1 //===-- ARMISelLowering.cpp - ARM DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
16 #include "ARMAddressingModes.h"
17 #include "ARMConstantPoolValue.h"
18 #include "ARMISelLowering.h"
19 #include "ARMMachineFunctionInfo.h"
20 #include "ARMPerfectShuffle.h"
21 #include "ARMRegisterInfo.h"
22 #include "ARMSubtarget.h"
23 #include "ARMTargetMachine.h"
24 #include "ARMTargetObjectFile.h"
25 #include "llvm/CallingConv.h"
26 #include "llvm/Constants.h"
27 #include "llvm/Function.h"
28 #include "llvm/GlobalValue.h"
29 #include "llvm/Instruction.h"
30 #include "llvm/Intrinsics.h"
31 #include "llvm/Type.h"
32 #include "llvm/CodeGen/CallingConvLower.h"
33 #include "llvm/CodeGen/MachineBasicBlock.h"
34 #include "llvm/CodeGen/MachineFrameInfo.h"
35 #include "llvm/CodeGen/MachineFunction.h"
36 #include "llvm/CodeGen/MachineInstrBuilder.h"
37 #include "llvm/CodeGen/MachineRegisterInfo.h"
38 #include "llvm/CodeGen/PseudoSourceValue.h"
39 #include "llvm/CodeGen/SelectionDAG.h"
40 #include "llvm/Target/TargetOptions.h"
41 #include "llvm/ADT/VectorExtras.h"
42 #include "llvm/Support/CommandLine.h"
43 #include "llvm/Support/ErrorHandling.h"
44 #include "llvm/Support/MathExtras.h"
45 #include "llvm/Support/raw_ostream.h"
49 static bool CC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
50 CCValAssign::LocInfo &LocInfo,
51 ISD::ArgFlagsTy &ArgFlags,
53 static bool CC_ARM_AAPCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
54 CCValAssign::LocInfo &LocInfo,
55 ISD::ArgFlagsTy &ArgFlags,
57 static bool RetCC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
58 CCValAssign::LocInfo &LocInfo,
59 ISD::ArgFlagsTy &ArgFlags,
61 static bool RetCC_ARM_AAPCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
62 CCValAssign::LocInfo &LocInfo,
63 ISD::ArgFlagsTy &ArgFlags,
66 void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
67 EVT PromotedBitwiseVT) {
68 if (VT != PromotedLdStVT) {
69 setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
70 AddPromotedToType (ISD::LOAD, VT.getSimpleVT(),
71 PromotedLdStVT.getSimpleVT());
73 setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
74 AddPromotedToType (ISD::STORE, VT.getSimpleVT(),
75 PromotedLdStVT.getSimpleVT());
78 EVT ElemTy = VT.getVectorElementType();
79 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
80 setOperationAction(ISD::VSETCC, VT.getSimpleVT(), Custom);
81 if (ElemTy == MVT::i8 || ElemTy == MVT::i16)
82 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT.getSimpleVT(), Custom);
83 if (ElemTy != MVT::i32) {
84 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Expand);
85 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Expand);
86 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Expand);
87 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Expand);
89 setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
90 setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
91 setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Custom);
92 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Expand);
94 setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
95 setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
96 setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
99 // Promote all bit-wise operations.
100 if (VT.isInteger() && VT != PromotedBitwiseVT) {
101 setOperationAction(ISD::AND, VT.getSimpleVT(), Promote);
102 AddPromotedToType (ISD::AND, VT.getSimpleVT(),
103 PromotedBitwiseVT.getSimpleVT());
104 setOperationAction(ISD::OR, VT.getSimpleVT(), Promote);
105 AddPromotedToType (ISD::OR, VT.getSimpleVT(),
106 PromotedBitwiseVT.getSimpleVT());
107 setOperationAction(ISD::XOR, VT.getSimpleVT(), Promote);
108 AddPromotedToType (ISD::XOR, VT.getSimpleVT(),
109 PromotedBitwiseVT.getSimpleVT());
112 // Neon does not support vector divide/remainder operations.
113 setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
114 setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
115 setOperationAction(ISD::FDIV, VT.getSimpleVT(), Expand);
116 setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
117 setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
118 setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
121 void ARMTargetLowering::addDRTypeForNEON(EVT VT) {
122 addRegisterClass(VT, ARM::DPRRegisterClass);
123 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
126 void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
127 addRegisterClass(VT, ARM::QPRRegisterClass);
128 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
131 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
132 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
133 return new TargetLoweringObjectFileMachO();
134 return new ARMElfTargetObjectFile();
137 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
138 : TargetLowering(TM, createTLOF(TM)) {
139 Subtarget = &TM.getSubtarget<ARMSubtarget>();
141 if (Subtarget->isTargetDarwin()) {
142 // Uses VFP for Thumb libfuncs if available.
143 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
144 // Single-precision floating-point arithmetic.
145 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
146 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
147 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
148 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
150 // Double-precision floating-point arithmetic.
151 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
152 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
153 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
154 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
156 // Single-precision comparisons.
157 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
158 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
159 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
160 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
161 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
162 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
163 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
164 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
166 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
167 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
168 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
169 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
170 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
171 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
172 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
173 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
175 // Double-precision comparisons.
176 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
177 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
178 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
179 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
180 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
181 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
182 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
183 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
185 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
186 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
187 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
188 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
189 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
190 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
191 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
192 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
194 // Floating-point to integer conversions.
195 // i64 conversions are done via library routines even when generating VFP
196 // instructions, so use the same ones.
197 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
198 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
199 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
200 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
202 // Conversions between floating types.
203 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
204 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
206 // Integer to floating-point conversions.
207 // i64 conversions are done via library routines even when generating VFP
208 // instructions, so use the same ones.
209 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
210 // e.g., __floatunsidf vs. __floatunssidfvfp.
211 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
212 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
213 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
214 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
218 // These libcalls are not available in 32-bit.
219 setLibcallName(RTLIB::SHL_I128, 0);
220 setLibcallName(RTLIB::SRL_I128, 0);
221 setLibcallName(RTLIB::SRA_I128, 0);
223 // Libcalls should use the AAPCS base standard ABI, even if hard float
224 // is in effect, as per the ARM RTABI specification, section 4.1.2.
225 if (Subtarget->isAAPCS_ABI()) {
226 for (int i = 0; i < RTLIB::UNKNOWN_LIBCALL; ++i) {
227 setLibcallCallingConv(static_cast<RTLIB::Libcall>(i),
228 CallingConv::ARM_AAPCS);
232 if (Subtarget->isThumb1Only())
233 addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
235 addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
236 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
237 addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
238 addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
240 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
243 if (Subtarget->hasNEON()) {
244 addDRTypeForNEON(MVT::v2f32);
245 addDRTypeForNEON(MVT::v8i8);
246 addDRTypeForNEON(MVT::v4i16);
247 addDRTypeForNEON(MVT::v2i32);
248 addDRTypeForNEON(MVT::v1i64);
250 addQRTypeForNEON(MVT::v4f32);
251 addQRTypeForNEON(MVT::v2f64);
252 addQRTypeForNEON(MVT::v16i8);
253 addQRTypeForNEON(MVT::v8i16);
254 addQRTypeForNEON(MVT::v4i32);
255 addQRTypeForNEON(MVT::v2i64);
257 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
258 // neither Neon nor VFP support any arithmetic operations on it.
259 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
260 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
261 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
262 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
263 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
264 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
265 setOperationAction(ISD::VSETCC, MVT::v2f64, Expand);
266 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
267 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
268 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
269 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
270 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
271 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
272 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
273 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
274 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
275 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
276 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
277 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
278 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
279 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
280 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
281 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
282 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
284 // Neon does not support some operations on v1i64 and v2i64 types.
285 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
286 setOperationAction(ISD::MUL, MVT::v2i64, Expand);
287 setOperationAction(ISD::VSETCC, MVT::v1i64, Expand);
288 setOperationAction(ISD::VSETCC, MVT::v2i64, Expand);
290 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
291 setTargetDAGCombine(ISD::SHL);
292 setTargetDAGCombine(ISD::SRL);
293 setTargetDAGCombine(ISD::SRA);
294 setTargetDAGCombine(ISD::SIGN_EXTEND);
295 setTargetDAGCombine(ISD::ZERO_EXTEND);
296 setTargetDAGCombine(ISD::ANY_EXTEND);
299 computeRegisterProperties();
301 // ARM does not have f32 extending load.
302 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
304 // ARM does not have i1 sign extending load.
305 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
307 // ARM supports all 4 flavors of integer indexed load / store.
308 if (!Subtarget->isThumb1Only()) {
309 for (unsigned im = (unsigned)ISD::PRE_INC;
310 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
311 setIndexedLoadAction(im, MVT::i1, Legal);
312 setIndexedLoadAction(im, MVT::i8, Legal);
313 setIndexedLoadAction(im, MVT::i16, Legal);
314 setIndexedLoadAction(im, MVT::i32, Legal);
315 setIndexedStoreAction(im, MVT::i1, Legal);
316 setIndexedStoreAction(im, MVT::i8, Legal);
317 setIndexedStoreAction(im, MVT::i16, Legal);
318 setIndexedStoreAction(im, MVT::i32, Legal);
322 // i64 operation support.
323 if (Subtarget->isThumb1Only()) {
324 setOperationAction(ISD::MUL, MVT::i64, Expand);
325 setOperationAction(ISD::MULHU, MVT::i32, Expand);
326 setOperationAction(ISD::MULHS, MVT::i32, Expand);
327 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
328 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
330 setOperationAction(ISD::MUL, MVT::i64, Expand);
331 setOperationAction(ISD::MULHU, MVT::i32, Expand);
332 if (!Subtarget->hasV6Ops())
333 setOperationAction(ISD::MULHS, MVT::i32, Expand);
335 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
336 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
337 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
338 setOperationAction(ISD::SRL, MVT::i64, Custom);
339 setOperationAction(ISD::SRA, MVT::i64, Custom);
341 // ARM does not have ROTL.
342 setOperationAction(ISD::ROTL, MVT::i32, Expand);
343 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
344 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
345 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
346 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
348 // Only ARMv6 has BSWAP.
349 if (!Subtarget->hasV6Ops())
350 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
352 // These are expanded into libcalls.
353 setOperationAction(ISD::SDIV, MVT::i32, Expand);
354 setOperationAction(ISD::UDIV, MVT::i32, Expand);
355 setOperationAction(ISD::SREM, MVT::i32, Expand);
356 setOperationAction(ISD::UREM, MVT::i32, Expand);
357 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
358 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
360 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
361 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
362 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
363 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
364 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
366 // Use the default implementation.
367 setOperationAction(ISD::VASTART, MVT::Other, Custom);
368 setOperationAction(ISD::VAARG, MVT::Other, Expand);
369 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
370 setOperationAction(ISD::VAEND, MVT::Other, Expand);
371 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
372 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
373 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
374 // FIXME: Shouldn't need this, since no register is used, but the legalizer
375 // doesn't yet know how to not do that for SjLj.
376 setExceptionSelectorRegister(ARM::R0);
377 if (Subtarget->isThumb())
378 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
380 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
381 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
383 if (!Subtarget->hasV6Ops() && !Subtarget->isThumb2()) {
384 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
385 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
387 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
389 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only())
390 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
391 // iff target supports vfp2.
392 setOperationAction(ISD::BIT_CONVERT, MVT::i64, Custom);
394 // We want to custom lower some of our intrinsics.
395 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
397 setOperationAction(ISD::SETCC, MVT::i32, Expand);
398 setOperationAction(ISD::SETCC, MVT::f32, Expand);
399 setOperationAction(ISD::SETCC, MVT::f64, Expand);
400 setOperationAction(ISD::SELECT, MVT::i32, Expand);
401 setOperationAction(ISD::SELECT, MVT::f32, Expand);
402 setOperationAction(ISD::SELECT, MVT::f64, Expand);
403 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
404 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
405 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
407 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
408 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
409 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
410 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
411 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
413 // We don't support sin/cos/fmod/copysign/pow
414 setOperationAction(ISD::FSIN, MVT::f64, Expand);
415 setOperationAction(ISD::FSIN, MVT::f32, Expand);
416 setOperationAction(ISD::FCOS, MVT::f32, Expand);
417 setOperationAction(ISD::FCOS, MVT::f64, Expand);
418 setOperationAction(ISD::FREM, MVT::f64, Expand);
419 setOperationAction(ISD::FREM, MVT::f32, Expand);
420 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
421 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
422 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
424 setOperationAction(ISD::FPOW, MVT::f64, Expand);
425 setOperationAction(ISD::FPOW, MVT::f32, Expand);
427 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
428 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
429 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
430 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
431 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
432 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
435 // We have target-specific dag combine patterns for the following nodes:
436 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
437 setTargetDAGCombine(ISD::ADD);
438 setTargetDAGCombine(ISD::SUB);
440 setStackPointerRegisterToSaveRestore(ARM::SP);
441 setSchedulingPreference(SchedulingForRegPressure);
443 // FIXME: If-converter should use instruction latency to determine
444 // profitability rather than relying on fixed limits.
445 if (Subtarget->getCPUString() == "generic") {
446 // Generic (and overly aggressive) if-conversion limits.
447 setIfCvtBlockSizeLimit(10);
448 setIfCvtDupBlockSizeLimit(2);
449 } else if (Subtarget->hasV6Ops()) {
450 setIfCvtBlockSizeLimit(2);
451 setIfCvtDupBlockSizeLimit(1);
453 setIfCvtBlockSizeLimit(3);
454 setIfCvtDupBlockSizeLimit(2);
457 maxStoresPerMemcpy = 1; //// temporary - rewrite interface to use type
458 // Do not enable CodePlacementOpt for now: it currently runs after the
459 // ARMConstantIslandPass and messes up branch relaxation and placement
460 // of constant islands.
461 // benefitFromCodePlacementOpt = true;
464 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
467 case ARMISD::Wrapper: return "ARMISD::Wrapper";
468 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
469 case ARMISD::CALL: return "ARMISD::CALL";
470 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
471 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
472 case ARMISD::tCALL: return "ARMISD::tCALL";
473 case ARMISD::BRCOND: return "ARMISD::BRCOND";
474 case ARMISD::BR_JT: return "ARMISD::BR_JT";
475 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
476 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
477 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
478 case ARMISD::CMP: return "ARMISD::CMP";
479 case ARMISD::CMPZ: return "ARMISD::CMPZ";
480 case ARMISD::CMPFP: return "ARMISD::CMPFP";
481 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
482 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
483 case ARMISD::CMOV: return "ARMISD::CMOV";
484 case ARMISD::CNEG: return "ARMISD::CNEG";
486 case ARMISD::RBIT: return "ARMISD::RBIT";
488 case ARMISD::FTOSI: return "ARMISD::FTOSI";
489 case ARMISD::FTOUI: return "ARMISD::FTOUI";
490 case ARMISD::SITOF: return "ARMISD::SITOF";
491 case ARMISD::UITOF: return "ARMISD::UITOF";
493 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
494 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
495 case ARMISD::RRX: return "ARMISD::RRX";
497 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
498 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
500 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
501 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
503 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
505 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
507 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
508 case ARMISD::SYNCBARRIER: return "ARMISD::SYNCBARRIER";
510 case ARMISD::VCEQ: return "ARMISD::VCEQ";
511 case ARMISD::VCGE: return "ARMISD::VCGE";
512 case ARMISD::VCGEU: return "ARMISD::VCGEU";
513 case ARMISD::VCGT: return "ARMISD::VCGT";
514 case ARMISD::VCGTU: return "ARMISD::VCGTU";
515 case ARMISD::VTST: return "ARMISD::VTST";
517 case ARMISD::VSHL: return "ARMISD::VSHL";
518 case ARMISD::VSHRs: return "ARMISD::VSHRs";
519 case ARMISD::VSHRu: return "ARMISD::VSHRu";
520 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
521 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
522 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
523 case ARMISD::VSHRN: return "ARMISD::VSHRN";
524 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
525 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
526 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
527 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
528 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
529 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
530 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
531 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
532 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
533 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
534 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
535 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
536 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
537 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
538 case ARMISD::VDUP: return "ARMISD::VDUP";
539 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
540 case ARMISD::VEXT: return "ARMISD::VEXT";
541 case ARMISD::VREV64: return "ARMISD::VREV64";
542 case ARMISD::VREV32: return "ARMISD::VREV32";
543 case ARMISD::VREV16: return "ARMISD::VREV16";
544 case ARMISD::VZIP: return "ARMISD::VZIP";
545 case ARMISD::VUZP: return "ARMISD::VUZP";
546 case ARMISD::VTRN: return "ARMISD::VTRN";
550 /// getFunctionAlignment - Return the Log2 alignment of this function.
551 unsigned ARMTargetLowering::getFunctionAlignment(const Function *F) const {
552 return getTargetMachine().getSubtarget<ARMSubtarget>().isThumb() ? 0 : 1;
555 //===----------------------------------------------------------------------===//
557 //===----------------------------------------------------------------------===//
559 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
560 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
562 default: llvm_unreachable("Unknown condition code!");
563 case ISD::SETNE: return ARMCC::NE;
564 case ISD::SETEQ: return ARMCC::EQ;
565 case ISD::SETGT: return ARMCC::GT;
566 case ISD::SETGE: return ARMCC::GE;
567 case ISD::SETLT: return ARMCC::LT;
568 case ISD::SETLE: return ARMCC::LE;
569 case ISD::SETUGT: return ARMCC::HI;
570 case ISD::SETUGE: return ARMCC::HS;
571 case ISD::SETULT: return ARMCC::LO;
572 case ISD::SETULE: return ARMCC::LS;
576 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
577 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
578 ARMCC::CondCodes &CondCode2) {
579 CondCode2 = ARMCC::AL;
581 default: llvm_unreachable("Unknown FP condition!");
583 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
585 case ISD::SETOGT: CondCode = ARMCC::GT; break;
587 case ISD::SETOGE: CondCode = ARMCC::GE; break;
588 case ISD::SETOLT: CondCode = ARMCC::MI; break;
589 case ISD::SETOLE: CondCode = ARMCC::LS; break;
590 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
591 case ISD::SETO: CondCode = ARMCC::VC; break;
592 case ISD::SETUO: CondCode = ARMCC::VS; break;
593 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
594 case ISD::SETUGT: CondCode = ARMCC::HI; break;
595 case ISD::SETUGE: CondCode = ARMCC::PL; break;
597 case ISD::SETULT: CondCode = ARMCC::LT; break;
599 case ISD::SETULE: CondCode = ARMCC::LE; break;
601 case ISD::SETUNE: CondCode = ARMCC::NE; break;
605 //===----------------------------------------------------------------------===//
606 // Calling Convention Implementation
607 //===----------------------------------------------------------------------===//
609 #include "ARMGenCallingConv.inc"
611 // APCS f64 is in register pairs, possibly split to stack
612 static bool f64AssignAPCS(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
613 CCValAssign::LocInfo &LocInfo,
614 CCState &State, bool CanFail) {
615 static const unsigned RegList[] = { ARM::R0, ARM::R1, ARM::R2, ARM::R3 };
617 // Try to get the first register.
618 if (unsigned Reg = State.AllocateReg(RegList, 4))
619 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, Reg, LocVT, LocInfo));
621 // For the 2nd half of a v2f64, do not fail.
625 // Put the whole thing on the stack.
626 State.addLoc(CCValAssign::getCustomMem(ValNo, ValVT,
627 State.AllocateStack(8, 4),
632 // Try to get the second register.
633 if (unsigned Reg = State.AllocateReg(RegList, 4))
634 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, Reg, LocVT, LocInfo));
636 State.addLoc(CCValAssign::getCustomMem(ValNo, ValVT,
637 State.AllocateStack(4, 4),
642 static bool CC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
643 CCValAssign::LocInfo &LocInfo,
644 ISD::ArgFlagsTy &ArgFlags,
646 if (!f64AssignAPCS(ValNo, ValVT, LocVT, LocInfo, State, true))
648 if (LocVT == MVT::v2f64 &&
649 !f64AssignAPCS(ValNo, ValVT, LocVT, LocInfo, State, false))
651 return true; // we handled it
654 // AAPCS f64 is in aligned register pairs
655 static bool f64AssignAAPCS(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
656 CCValAssign::LocInfo &LocInfo,
657 CCState &State, bool CanFail) {
658 static const unsigned HiRegList[] = { ARM::R0, ARM::R2 };
659 static const unsigned LoRegList[] = { ARM::R1, ARM::R3 };
661 unsigned Reg = State.AllocateReg(HiRegList, LoRegList, 2);
663 // For the 2nd half of a v2f64, do not just fail.
667 // Put the whole thing on the stack.
668 State.addLoc(CCValAssign::getCustomMem(ValNo, ValVT,
669 State.AllocateStack(8, 8),
675 for (i = 0; i < 2; ++i)
676 if (HiRegList[i] == Reg)
679 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, Reg, LocVT, LocInfo));
680 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, LoRegList[i],
685 static bool CC_ARM_AAPCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
686 CCValAssign::LocInfo &LocInfo,
687 ISD::ArgFlagsTy &ArgFlags,
689 if (!f64AssignAAPCS(ValNo, ValVT, LocVT, LocInfo, State, true))
691 if (LocVT == MVT::v2f64 &&
692 !f64AssignAAPCS(ValNo, ValVT, LocVT, LocInfo, State, false))
694 return true; // we handled it
697 static bool f64RetAssign(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
698 CCValAssign::LocInfo &LocInfo, CCState &State) {
699 static const unsigned HiRegList[] = { ARM::R0, ARM::R2 };
700 static const unsigned LoRegList[] = { ARM::R1, ARM::R3 };
702 unsigned Reg = State.AllocateReg(HiRegList, LoRegList, 2);
704 return false; // we didn't handle it
707 for (i = 0; i < 2; ++i)
708 if (HiRegList[i] == Reg)
711 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, Reg, LocVT, LocInfo));
712 State.addLoc(CCValAssign::getCustomReg(ValNo, ValVT, LoRegList[i],
717 static bool RetCC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
718 CCValAssign::LocInfo &LocInfo,
719 ISD::ArgFlagsTy &ArgFlags,
721 if (!f64RetAssign(ValNo, ValVT, LocVT, LocInfo, State))
723 if (LocVT == MVT::v2f64 && !f64RetAssign(ValNo, ValVT, LocVT, LocInfo, State))
725 return true; // we handled it
728 static bool RetCC_ARM_AAPCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
729 CCValAssign::LocInfo &LocInfo,
730 ISD::ArgFlagsTy &ArgFlags,
732 return RetCC_ARM_APCS_Custom_f64(ValNo, ValVT, LocVT, LocInfo, ArgFlags,
736 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
737 /// given CallingConvention value.
738 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
740 bool isVarArg) const {
743 llvm_unreachable("Unsupported calling convention");
745 case CallingConv::Fast:
746 // Use target triple & subtarget features to do actual dispatch.
747 if (Subtarget->isAAPCS_ABI()) {
748 if (Subtarget->hasVFP2() &&
749 FloatABIType == FloatABI::Hard && !isVarArg)
750 return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
752 return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
754 return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
755 case CallingConv::ARM_AAPCS_VFP:
756 return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
757 case CallingConv::ARM_AAPCS:
758 return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
759 case CallingConv::ARM_APCS:
760 return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
764 /// LowerCallResult - Lower the result values of a call into the
765 /// appropriate copies out of appropriate physical registers.
767 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
768 CallingConv::ID CallConv, bool isVarArg,
769 const SmallVectorImpl<ISD::InputArg> &Ins,
770 DebugLoc dl, SelectionDAG &DAG,
771 SmallVectorImpl<SDValue> &InVals) {
773 // Assign locations to each value returned by this call.
774 SmallVector<CCValAssign, 16> RVLocs;
775 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
776 RVLocs, *DAG.getContext());
777 CCInfo.AnalyzeCallResult(Ins,
778 CCAssignFnForNode(CallConv, /* Return*/ true,
781 // Copy all of the result registers out of their specified physreg.
782 for (unsigned i = 0; i != RVLocs.size(); ++i) {
783 CCValAssign VA = RVLocs[i];
786 if (VA.needsCustom()) {
787 // Handle f64 or half of a v2f64.
788 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
790 Chain = Lo.getValue(1);
791 InFlag = Lo.getValue(2);
792 VA = RVLocs[++i]; // skip ahead to next loc
793 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
795 Chain = Hi.getValue(1);
796 InFlag = Hi.getValue(2);
797 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
799 if (VA.getLocVT() == MVT::v2f64) {
800 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
801 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
802 DAG.getConstant(0, MVT::i32));
804 VA = RVLocs[++i]; // skip ahead to next loc
805 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
806 Chain = Lo.getValue(1);
807 InFlag = Lo.getValue(2);
808 VA = RVLocs[++i]; // skip ahead to next loc
809 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
810 Chain = Hi.getValue(1);
811 InFlag = Hi.getValue(2);
812 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
813 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
814 DAG.getConstant(1, MVT::i32));
817 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
819 Chain = Val.getValue(1);
820 InFlag = Val.getValue(2);
823 switch (VA.getLocInfo()) {
824 default: llvm_unreachable("Unknown loc info!");
825 case CCValAssign::Full: break;
826 case CCValAssign::BCvt:
827 Val = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), Val);
831 InVals.push_back(Val);
837 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
838 /// by "Src" to address "Dst" of size "Size". Alignment information is
839 /// specified by the specific parameter attribute. The copy will be passed as
840 /// a byval function parameter.
841 /// Sometimes what we are copying is the end of a larger object, the part that
842 /// does not fit in registers.
844 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
845 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
847 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
848 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
849 /*AlwaysInline=*/false, NULL, 0, NULL, 0);
852 /// LowerMemOpCallTo - Store the argument to the stack.
854 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
855 SDValue StackPtr, SDValue Arg,
856 DebugLoc dl, SelectionDAG &DAG,
857 const CCValAssign &VA,
858 ISD::ArgFlagsTy Flags) {
859 unsigned LocMemOffset = VA.getLocMemOffset();
860 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
861 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
862 if (Flags.isByVal()) {
863 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
865 return DAG.getStore(Chain, dl, Arg, PtrOff,
866 PseudoSourceValue::getStack(), LocMemOffset);
869 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
870 SDValue Chain, SDValue &Arg,
871 RegsToPassVector &RegsToPass,
872 CCValAssign &VA, CCValAssign &NextVA,
874 SmallVector<SDValue, 8> &MemOpChains,
875 ISD::ArgFlagsTy Flags) {
877 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
878 DAG.getVTList(MVT::i32, MVT::i32), Arg);
879 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
881 if (NextVA.isRegLoc())
882 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
884 assert(NextVA.isMemLoc());
885 if (StackPtr.getNode() == 0)
886 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
888 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
894 /// LowerCall - Lowering a call into a callseq_start <-
895 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
898 ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
899 CallingConv::ID CallConv, bool isVarArg,
901 const SmallVectorImpl<ISD::OutputArg> &Outs,
902 const SmallVectorImpl<ISD::InputArg> &Ins,
903 DebugLoc dl, SelectionDAG &DAG,
904 SmallVectorImpl<SDValue> &InVals) {
906 // Analyze operands of the call, assigning locations to each operand.
907 SmallVector<CCValAssign, 16> ArgLocs;
908 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), ArgLocs,
910 CCInfo.AnalyzeCallOperands(Outs,
911 CCAssignFnForNode(CallConv, /* Return*/ false,
914 // Get a count of how many bytes are to be pushed on the stack.
915 unsigned NumBytes = CCInfo.getNextStackOffset();
917 // Adjust the stack pointer for the new arguments...
918 // These operations are automatically eliminated by the prolog/epilog pass
919 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
921 SDValue StackPtr = DAG.getRegister(ARM::SP, MVT::i32);
923 RegsToPassVector RegsToPass;
924 SmallVector<SDValue, 8> MemOpChains;
926 // Walk the register/memloc assignments, inserting copies/loads. In the case
927 // of tail call optimization, arguments are handled later.
928 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
931 CCValAssign &VA = ArgLocs[i];
932 SDValue Arg = Outs[realArgIdx].Val;
933 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
935 // Promote the value if needed.
936 switch (VA.getLocInfo()) {
937 default: llvm_unreachable("Unknown loc info!");
938 case CCValAssign::Full: break;
939 case CCValAssign::SExt:
940 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
942 case CCValAssign::ZExt:
943 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
945 case CCValAssign::AExt:
946 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
948 case CCValAssign::BCvt:
949 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), Arg);
953 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
954 if (VA.needsCustom()) {
955 if (VA.getLocVT() == MVT::v2f64) {
956 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
957 DAG.getConstant(0, MVT::i32));
958 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
959 DAG.getConstant(1, MVT::i32));
961 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
962 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
964 VA = ArgLocs[++i]; // skip ahead to next loc
966 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
967 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
969 assert(VA.isMemLoc());
970 if (StackPtr.getNode() == 0)
971 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
973 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
974 dl, DAG, VA, Flags));
977 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
978 StackPtr, MemOpChains, Flags);
980 } else if (VA.isRegLoc()) {
981 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
983 assert(VA.isMemLoc());
984 if (StackPtr.getNode() == 0)
985 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
987 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
988 dl, DAG, VA, Flags));
992 if (!MemOpChains.empty())
993 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
994 &MemOpChains[0], MemOpChains.size());
996 // Build a sequence of copy-to-reg nodes chained together with token chain
997 // and flag operands which copy the outgoing args into the appropriate regs.
999 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1000 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1001 RegsToPass[i].second, InFlag);
1002 InFlag = Chain.getValue(1);
1005 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1006 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1007 // node so that legalize doesn't hack it.
1008 bool isDirect = false;
1009 bool isARMFunc = false;
1010 bool isLocalARMFunc = false;
1011 MachineFunction &MF = DAG.getMachineFunction();
1012 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1013 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1014 GlobalValue *GV = G->getGlobal();
1016 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1017 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1018 getTargetMachine().getRelocationModel() != Reloc::Static;
1019 isARMFunc = !Subtarget->isThumb() || isStub;
1020 // ARM call to a local ARM function is predicable.
1021 isLocalARMFunc = !Subtarget->isThumb() && !isExt;
1022 // tBX takes a register source operand.
1023 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1024 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1025 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV,
1028 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1029 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1030 Callee = DAG.getLoad(getPointerTy(), dl,
1031 DAG.getEntryNode(), CPAddr,
1032 PseudoSourceValue::getConstantPool(), 0);
1033 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1034 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1035 getPointerTy(), Callee, PICLabel);
1037 Callee = DAG.getTargetGlobalAddress(GV, getPointerTy());
1038 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1040 bool isStub = Subtarget->isTargetDarwin() &&
1041 getTargetMachine().getRelocationModel() != Reloc::Static;
1042 isARMFunc = !Subtarget->isThumb() || isStub;
1043 // tBX takes a register source operand.
1044 const char *Sym = S->getSymbol();
1045 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1046 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1047 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
1048 Sym, ARMPCLabelIndex, 4);
1049 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1050 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1051 Callee = DAG.getLoad(getPointerTy(), dl,
1052 DAG.getEntryNode(), CPAddr,
1053 PseudoSourceValue::getConstantPool(), 0);
1054 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1055 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1056 getPointerTy(), Callee, PICLabel);
1058 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy());
1061 // FIXME: handle tail calls differently.
1063 if (Subtarget->isThumb()) {
1064 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1065 CallOpc = ARMISD::CALL_NOLINK;
1067 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1069 CallOpc = (isDirect || Subtarget->hasV5TOps())
1070 ? (isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL)
1071 : ARMISD::CALL_NOLINK;
1073 if (CallOpc == ARMISD::CALL_NOLINK && !Subtarget->isThumb1Only()) {
1074 // implicit def LR - LR mustn't be allocated as GRP:$dst of CALL_NOLINK
1075 Chain = DAG.getCopyToReg(Chain, dl, ARM::LR, DAG.getUNDEF(MVT::i32),InFlag);
1076 InFlag = Chain.getValue(1);
1079 std::vector<SDValue> Ops;
1080 Ops.push_back(Chain);
1081 Ops.push_back(Callee);
1083 // Add argument registers to the end of the list so that they are known live
1085 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1086 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1087 RegsToPass[i].second.getValueType()));
1089 if (InFlag.getNode())
1090 Ops.push_back(InFlag);
1091 // Returns a chain and a flag for retval copy to use.
1092 Chain = DAG.getNode(CallOpc, dl, DAG.getVTList(MVT::Other, MVT::Flag),
1093 &Ops[0], Ops.size());
1094 InFlag = Chain.getValue(1);
1096 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1097 DAG.getIntPtrConstant(0, true), InFlag);
1099 InFlag = Chain.getValue(1);
1101 // Handle result values, copying them out of physregs into vregs that we
1103 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1108 ARMTargetLowering::LowerReturn(SDValue Chain,
1109 CallingConv::ID CallConv, bool isVarArg,
1110 const SmallVectorImpl<ISD::OutputArg> &Outs,
1111 DebugLoc dl, SelectionDAG &DAG) {
1113 // CCValAssign - represent the assignment of the return value to a location.
1114 SmallVector<CCValAssign, 16> RVLocs;
1116 // CCState - Info about the registers and stack slots.
1117 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), RVLocs,
1120 // Analyze outgoing return values.
1121 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1124 // If this is the first return lowered for this function, add
1125 // the regs to the liveout set for the function.
1126 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1127 for (unsigned i = 0; i != RVLocs.size(); ++i)
1128 if (RVLocs[i].isRegLoc())
1129 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1134 // Copy the result values into the output registers.
1135 for (unsigned i = 0, realRVLocIdx = 0;
1137 ++i, ++realRVLocIdx) {
1138 CCValAssign &VA = RVLocs[i];
1139 assert(VA.isRegLoc() && "Can only return in registers!");
1141 SDValue Arg = Outs[realRVLocIdx].Val;
1143 switch (VA.getLocInfo()) {
1144 default: llvm_unreachable("Unknown loc info!");
1145 case CCValAssign::Full: break;
1146 case CCValAssign::BCvt:
1147 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), Arg);
1151 if (VA.needsCustom()) {
1152 if (VA.getLocVT() == MVT::v2f64) {
1153 // Extract the first half and return it in two registers.
1154 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1155 DAG.getConstant(0, MVT::i32));
1156 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1157 DAG.getVTList(MVT::i32, MVT::i32), Half);
1159 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1160 Flag = Chain.getValue(1);
1161 VA = RVLocs[++i]; // skip ahead to next loc
1162 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1163 HalfGPRs.getValue(1), Flag);
1164 Flag = Chain.getValue(1);
1165 VA = RVLocs[++i]; // skip ahead to next loc
1167 // Extract the 2nd half and fall through to handle it as an f64 value.
1168 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1169 DAG.getConstant(1, MVT::i32));
1171 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1173 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1174 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1175 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1176 Flag = Chain.getValue(1);
1177 VA = RVLocs[++i]; // skip ahead to next loc
1178 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1181 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1183 // Guarantee that all emitted copies are
1184 // stuck together, avoiding something bad.
1185 Flag = Chain.getValue(1);
1190 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1192 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1197 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
1198 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
1199 // one of the above mentioned nodes. It has to be wrapped because otherwise
1200 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
1201 // be used to form addressing mode. These wrapped nodes will be selected
1203 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
1204 EVT PtrVT = Op.getValueType();
1205 // FIXME there is no actual debug info here
1206 DebugLoc dl = Op.getDebugLoc();
1207 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1209 if (CP->isMachineConstantPoolEntry())
1210 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
1211 CP->getAlignment());
1213 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
1214 CP->getAlignment());
1215 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
1218 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) {
1219 MachineFunction &MF = DAG.getMachineFunction();
1220 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1221 unsigned ARMPCLabelIndex = 0;
1222 DebugLoc DL = Op.getDebugLoc();
1223 EVT PtrVT = getPointerTy();
1224 BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1225 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1227 if (RelocM == Reloc::Static) {
1228 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
1230 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
1231 ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1232 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(BA, ARMPCLabelIndex,
1233 ARMCP::CPBlockAddress,
1235 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1237 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
1238 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
1239 PseudoSourceValue::getConstantPool(), 0);
1240 if (RelocM == Reloc::Static)
1242 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1243 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
1246 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
1248 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
1249 SelectionDAG &DAG) {
1250 DebugLoc dl = GA->getDebugLoc();
1251 EVT PtrVT = getPointerTy();
1252 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
1253 MachineFunction &MF = DAG.getMachineFunction();
1254 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1255 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1256 ARMConstantPoolValue *CPV =
1257 new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
1258 ARMCP::CPValue, PCAdj, "tlsgd", true);
1259 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1260 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
1261 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
1262 PseudoSourceValue::getConstantPool(), 0);
1263 SDValue Chain = Argument.getValue(1);
1265 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1266 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
1268 // call __tls_get_addr.
1271 Entry.Node = Argument;
1272 Entry.Ty = (const Type *) Type::getInt32Ty(*DAG.getContext());
1273 Args.push_back(Entry);
1274 // FIXME: is there useful debug info available here?
1275 std::pair<SDValue, SDValue> CallResult =
1276 LowerCallTo(Chain, (const Type *) Type::getInt32Ty(*DAG.getContext()),
1277 false, false, false, false,
1278 0, CallingConv::C, false, /*isReturnValueUsed=*/true,
1279 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl,
1280 DAG.GetOrdering(Chain.getNode()));
1281 return CallResult.first;
1284 // Lower ISD::GlobalTLSAddress using the "initial exec" or
1285 // "local exec" model.
1287 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
1288 SelectionDAG &DAG) {
1289 GlobalValue *GV = GA->getGlobal();
1290 DebugLoc dl = GA->getDebugLoc();
1292 SDValue Chain = DAG.getEntryNode();
1293 EVT PtrVT = getPointerTy();
1294 // Get the Thread Pointer
1295 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
1297 if (GV->isDeclaration()) {
1298 MachineFunction &MF = DAG.getMachineFunction();
1299 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1300 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1301 // Initial exec model.
1302 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
1303 ARMConstantPoolValue *CPV =
1304 new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
1305 ARMCP::CPValue, PCAdj, "gottpoff", true);
1306 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1307 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
1308 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1309 PseudoSourceValue::getConstantPool(), 0);
1310 Chain = Offset.getValue(1);
1312 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1313 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
1315 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1316 PseudoSourceValue::getConstantPool(), 0);
1319 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, "tpoff");
1320 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1321 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
1322 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1323 PseudoSourceValue::getConstantPool(), 0);
1326 // The address of the thread local variable is the add of the thread
1327 // pointer with the offset of the variable.
1328 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
1332 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) {
1333 // TODO: implement the "local dynamic" model
1334 assert(Subtarget->isTargetELF() &&
1335 "TLS not implemented for non-ELF targets");
1336 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1337 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
1338 // otherwise use the "Local Exec" TLS Model
1339 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
1340 return LowerToTLSGeneralDynamicModel(GA, DAG);
1342 return LowerToTLSExecModels(GA, DAG);
1345 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
1346 SelectionDAG &DAG) {
1347 EVT PtrVT = getPointerTy();
1348 DebugLoc dl = Op.getDebugLoc();
1349 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1350 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1351 if (RelocM == Reloc::PIC_) {
1352 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
1353 ARMConstantPoolValue *CPV =
1354 new ARMConstantPoolValue(GV, UseGOTOFF ? "GOTOFF" : "GOT");
1355 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1356 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1357 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
1359 PseudoSourceValue::getConstantPool(), 0);
1360 SDValue Chain = Result.getValue(1);
1361 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
1362 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
1364 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
1365 PseudoSourceValue::getGOT(), 0);
1368 // If we have T2 ops, we can materialize the address directly via movt/movw
1369 // pair. This is always cheaper.
1370 if (Subtarget->useMovt()) {
1371 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
1372 DAG.getTargetGlobalAddress(GV, PtrVT));
1374 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
1375 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1376 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1377 PseudoSourceValue::getConstantPool(), 0);
1382 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
1383 SelectionDAG &DAG) {
1384 MachineFunction &MF = DAG.getMachineFunction();
1385 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1386 unsigned ARMPCLabelIndex = 0;
1387 EVT PtrVT = getPointerTy();
1388 DebugLoc dl = Op.getDebugLoc();
1389 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1390 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1392 if (RelocM == Reloc::Static)
1393 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
1395 ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1396 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
1397 ARMConstantPoolValue *CPV =
1398 new ARMConstantPoolValue(GV, ARMPCLabelIndex, ARMCP::CPValue, PCAdj);
1399 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1401 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1403 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1404 PseudoSourceValue::getConstantPool(), 0);
1405 SDValue Chain = Result.getValue(1);
1407 if (RelocM == Reloc::PIC_) {
1408 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1409 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
1412 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
1413 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
1414 PseudoSourceValue::getGOT(), 0);
1419 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
1421 assert(Subtarget->isTargetELF() &&
1422 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
1423 MachineFunction &MF = DAG.getMachineFunction();
1424 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1425 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1426 EVT PtrVT = getPointerTy();
1427 DebugLoc dl = Op.getDebugLoc();
1428 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
1429 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
1430 "_GLOBAL_OFFSET_TABLE_",
1431 ARMPCLabelIndex, PCAdj);
1432 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1433 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1434 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1435 PseudoSourceValue::getConstantPool(), 0);
1436 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1437 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
1441 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
1442 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
1443 DebugLoc dl = Op.getDebugLoc();
1445 default: return SDValue(); // Don't custom lower most intrinsics.
1446 case Intrinsic::arm_thread_pointer: {
1447 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1448 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
1450 case Intrinsic::eh_sjlj_lsda: {
1451 MachineFunction &MF = DAG.getMachineFunction();
1452 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1453 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1454 EVT PtrVT = getPointerTy();
1455 DebugLoc dl = Op.getDebugLoc();
1456 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1458 unsigned PCAdj = (RelocM != Reloc::PIC_)
1459 ? 0 : (Subtarget->isThumb() ? 4 : 8);
1460 ARMConstantPoolValue *CPV =
1461 new ARMConstantPoolValue(MF.getFunction(), ARMPCLabelIndex,
1462 ARMCP::CPLSDA, PCAdj);
1463 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1464 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1466 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1467 PseudoSourceValue::getConstantPool(), 0);
1468 SDValue Chain = Result.getValue(1);
1470 if (RelocM == Reloc::PIC_) {
1471 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1472 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
1476 case Intrinsic::eh_sjlj_setjmp:
1477 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl, MVT::i32, Op.getOperand(1));
1481 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
1482 const ARMSubtarget *Subtarget) {
1483 DebugLoc dl = Op.getDebugLoc();
1484 SDValue Op5 = Op.getOperand(5);
1486 unsigned isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue();
1487 if (isDeviceBarrier) {
1488 if (Subtarget->hasV7Ops())
1489 Res = DAG.getNode(ARMISD::SYNCBARRIER, dl, MVT::Other, Op.getOperand(0));
1491 Res = DAG.getNode(ARMISD::SYNCBARRIER, dl, MVT::Other, Op.getOperand(0),
1492 DAG.getConstant(0, MVT::i32));
1494 if (Subtarget->hasV7Ops())
1495 Res = DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
1497 Res = DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
1498 DAG.getConstant(0, MVT::i32));
1503 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG,
1504 unsigned VarArgsFrameIndex) {
1505 // vastart just stores the address of the VarArgsFrameIndex slot into the
1506 // memory location argument.
1507 DebugLoc dl = Op.getDebugLoc();
1508 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1509 SDValue FR = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
1510 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1511 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1), SV, 0);
1515 ARMTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) {
1516 SDNode *Node = Op.getNode();
1517 DebugLoc dl = Node->getDebugLoc();
1518 EVT VT = Node->getValueType(0);
1519 SDValue Chain = Op.getOperand(0);
1520 SDValue Size = Op.getOperand(1);
1521 SDValue Align = Op.getOperand(2);
1523 // Chain the dynamic stack allocation so that it doesn't modify the stack
1524 // pointer when other instructions are using the stack.
1525 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(0, true));
1527 unsigned AlignVal = cast<ConstantSDNode>(Align)->getZExtValue();
1528 unsigned StackAlign = getTargetMachine().getFrameInfo()->getStackAlignment();
1529 if (AlignVal > StackAlign)
1530 // Do this now since selection pass cannot introduce new target
1531 // independent node.
1532 Align = DAG.getConstant(-(uint64_t)AlignVal, VT);
1534 // In Thumb1 mode, there isn't a "sub r, sp, r" instruction, we will end up
1535 // using a "add r, sp, r" instead. Negate the size now so we don't have to
1536 // do even more horrible hack later.
1537 MachineFunction &MF = DAG.getMachineFunction();
1538 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1539 if (AFI->isThumb1OnlyFunction()) {
1541 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Size);
1543 uint32_t Val = C->getZExtValue();
1544 if (Val <= 508 && ((Val & 3) == 0))
1548 Size = DAG.getNode(ISD::SUB, dl, VT, DAG.getConstant(0, VT), Size);
1551 SDVTList VTList = DAG.getVTList(VT, MVT::Other);
1552 SDValue Ops1[] = { Chain, Size, Align };
1553 SDValue Res = DAG.getNode(ARMISD::DYN_ALLOC, dl, VTList, Ops1, 3);
1554 Chain = Res.getValue(1);
1555 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, true),
1556 DAG.getIntPtrConstant(0, true), SDValue());
1557 SDValue Ops2[] = { Res, Chain };
1558 return DAG.getMergeValues(Ops2, 2, dl);
1562 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
1563 SDValue &Root, SelectionDAG &DAG,
1565 MachineFunction &MF = DAG.getMachineFunction();
1566 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1568 TargetRegisterClass *RC;
1569 if (AFI->isThumb1OnlyFunction())
1570 RC = ARM::tGPRRegisterClass;
1572 RC = ARM::GPRRegisterClass;
1574 // Transform the arguments stored in physical registers into virtual ones.
1575 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1576 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
1579 if (NextVA.isMemLoc()) {
1580 unsigned ArgSize = NextVA.getLocVT().getSizeInBits()/8;
1581 MachineFrameInfo *MFI = MF.getFrameInfo();
1582 int FI = MFI->CreateFixedObject(ArgSize, NextVA.getLocMemOffset(),
1585 // Create load node to retrieve arguments from the stack.
1586 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1587 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
1588 PseudoSourceValue::getFixedStack(FI), 0);
1590 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
1591 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
1594 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
1598 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
1599 CallingConv::ID CallConv, bool isVarArg,
1600 const SmallVectorImpl<ISD::InputArg>
1602 DebugLoc dl, SelectionDAG &DAG,
1603 SmallVectorImpl<SDValue> &InVals) {
1605 MachineFunction &MF = DAG.getMachineFunction();
1606 MachineFrameInfo *MFI = MF.getFrameInfo();
1608 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1610 // Assign locations to all of the incoming arguments.
1611 SmallVector<CCValAssign, 16> ArgLocs;
1612 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), ArgLocs,
1614 CCInfo.AnalyzeFormalArguments(Ins,
1615 CCAssignFnForNode(CallConv, /* Return*/ false,
1618 SmallVector<SDValue, 16> ArgValues;
1620 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1621 CCValAssign &VA = ArgLocs[i];
1623 // Arguments stored in registers.
1624 if (VA.isRegLoc()) {
1625 EVT RegVT = VA.getLocVT();
1628 if (VA.needsCustom()) {
1629 // f64 and vector types are split up into multiple registers or
1630 // combinations of registers and stack slots.
1633 if (VA.getLocVT() == MVT::v2f64) {
1634 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
1636 VA = ArgLocs[++i]; // skip ahead to next loc
1637 SDValue ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
1639 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1640 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
1641 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
1642 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
1643 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
1645 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
1648 TargetRegisterClass *RC;
1650 if (RegVT == MVT::f32)
1651 RC = ARM::SPRRegisterClass;
1652 else if (RegVT == MVT::f64)
1653 RC = ARM::DPRRegisterClass;
1654 else if (RegVT == MVT::v2f64)
1655 RC = ARM::QPRRegisterClass;
1656 else if (RegVT == MVT::i32)
1657 RC = (AFI->isThumb1OnlyFunction() ?
1658 ARM::tGPRRegisterClass : ARM::GPRRegisterClass);
1660 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
1662 // Transform the arguments in physical registers into virtual ones.
1663 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1664 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1667 // If this is an 8 or 16-bit value, it is really passed promoted
1668 // to 32 bits. Insert an assert[sz]ext to capture this, then
1669 // truncate to the right size.
1670 switch (VA.getLocInfo()) {
1671 default: llvm_unreachable("Unknown loc info!");
1672 case CCValAssign::Full: break;
1673 case CCValAssign::BCvt:
1674 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), ArgValue);
1676 case CCValAssign::SExt:
1677 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1678 DAG.getValueType(VA.getValVT()));
1679 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1681 case CCValAssign::ZExt:
1682 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1683 DAG.getValueType(VA.getValVT()));
1684 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1688 InVals.push_back(ArgValue);
1690 } else { // VA.isRegLoc()
1693 assert(VA.isMemLoc());
1694 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
1696 unsigned ArgSize = VA.getLocVT().getSizeInBits()/8;
1697 int FI = MFI->CreateFixedObject(ArgSize, VA.getLocMemOffset(),
1700 // Create load nodes to retrieve arguments from the stack.
1701 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1702 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
1703 PseudoSourceValue::getFixedStack(FI), 0));
1709 static const unsigned GPRArgRegs[] = {
1710 ARM::R0, ARM::R1, ARM::R2, ARM::R3
1713 unsigned NumGPRs = CCInfo.getFirstUnallocated
1714 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
1716 unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
1717 unsigned VARegSize = (4 - NumGPRs) * 4;
1718 unsigned VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
1719 unsigned ArgOffset = CCInfo.getNextStackOffset();
1720 if (VARegSaveSize) {
1721 // If this function is vararg, store any remaining integer argument regs
1722 // to their spots on the stack so that they may be loaded by deferencing
1723 // the result of va_next.
1724 AFI->setVarArgsRegSaveSize(VARegSaveSize);
1725 VarArgsFrameIndex = MFI->CreateFixedObject(VARegSaveSize, ArgOffset +
1726 VARegSaveSize - VARegSize,
1728 SDValue FIN = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
1730 SmallVector<SDValue, 4> MemOps;
1731 for (; NumGPRs < 4; ++NumGPRs) {
1732 TargetRegisterClass *RC;
1733 if (AFI->isThumb1OnlyFunction())
1734 RC = ARM::tGPRRegisterClass;
1736 RC = ARM::GPRRegisterClass;
1738 unsigned VReg = MF.addLiveIn(GPRArgRegs[NumGPRs], RC);
1739 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
1740 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
1741 PseudoSourceValue::getFixedStack(VarArgsFrameIndex), 0);
1742 MemOps.push_back(Store);
1743 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
1744 DAG.getConstant(4, getPointerTy()));
1746 if (!MemOps.empty())
1747 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1748 &MemOps[0], MemOps.size());
1750 // This will point to the next argument passed via stack.
1751 VarArgsFrameIndex = MFI->CreateFixedObject(4, ArgOffset, true, false);
1757 /// isFloatingPointZero - Return true if this is +0.0.
1758 static bool isFloatingPointZero(SDValue Op) {
1759 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
1760 return CFP->getValueAPF().isPosZero();
1761 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
1762 // Maybe this has already been legalized into the constant pool?
1763 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
1764 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
1765 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
1766 if (ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
1767 return CFP->getValueAPF().isPosZero();
1773 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
1774 /// the given operands.
1776 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
1777 SDValue &ARMCC, SelectionDAG &DAG, DebugLoc dl) {
1778 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
1779 unsigned C = RHSC->getZExtValue();
1780 if (!isLegalICmpImmediate(C)) {
1781 // Constant does not fit, try adjusting it by one?
1786 if (isLegalICmpImmediate(C-1)) {
1787 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
1788 RHS = DAG.getConstant(C-1, MVT::i32);
1793 if (C > 0 && isLegalICmpImmediate(C-1)) {
1794 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
1795 RHS = DAG.getConstant(C-1, MVT::i32);
1800 if (isLegalICmpImmediate(C+1)) {
1801 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
1802 RHS = DAG.getConstant(C+1, MVT::i32);
1807 if (C < 0xffffffff && isLegalICmpImmediate(C+1)) {
1808 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
1809 RHS = DAG.getConstant(C+1, MVT::i32);
1816 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
1817 ARMISD::NodeType CompareType;
1820 CompareType = ARMISD::CMP;
1825 CompareType = ARMISD::CMPZ;
1828 ARMCC = DAG.getConstant(CondCode, MVT::i32);
1829 return DAG.getNode(CompareType, dl, MVT::Flag, LHS, RHS);
1832 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
1833 static SDValue getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
1836 if (!isFloatingPointZero(RHS))
1837 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Flag, LHS, RHS);
1839 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Flag, LHS);
1840 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Flag, Cmp);
1843 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) {
1844 EVT VT = Op.getValueType();
1845 SDValue LHS = Op.getOperand(0);
1846 SDValue RHS = Op.getOperand(1);
1847 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
1848 SDValue TrueVal = Op.getOperand(2);
1849 SDValue FalseVal = Op.getOperand(3);
1850 DebugLoc dl = Op.getDebugLoc();
1852 if (LHS.getValueType() == MVT::i32) {
1854 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
1855 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, dl);
1856 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMCC, CCR,Cmp);
1859 ARMCC::CondCodes CondCode, CondCode2;
1860 FPCCToARMCC(CC, CondCode, CondCode2);
1862 SDValue ARMCC = DAG.getConstant(CondCode, MVT::i32);
1863 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
1864 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
1865 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
1867 if (CondCode2 != ARMCC::AL) {
1868 SDValue ARMCC2 = DAG.getConstant(CondCode2, MVT::i32);
1869 // FIXME: Needs another CMP because flag can have but one use.
1870 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
1871 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
1872 Result, TrueVal, ARMCC2, CCR, Cmp2);
1877 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) {
1878 SDValue Chain = Op.getOperand(0);
1879 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
1880 SDValue LHS = Op.getOperand(2);
1881 SDValue RHS = Op.getOperand(3);
1882 SDValue Dest = Op.getOperand(4);
1883 DebugLoc dl = Op.getDebugLoc();
1885 if (LHS.getValueType() == MVT::i32) {
1887 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
1888 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMCC, DAG, dl);
1889 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
1890 Chain, Dest, ARMCC, CCR,Cmp);
1893 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
1894 ARMCC::CondCodes CondCode, CondCode2;
1895 FPCCToARMCC(CC, CondCode, CondCode2);
1897 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
1898 SDValue ARMCC = DAG.getConstant(CondCode, MVT::i32);
1899 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
1900 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Flag);
1901 SDValue Ops[] = { Chain, Dest, ARMCC, CCR, Cmp };
1902 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
1903 if (CondCode2 != ARMCC::AL) {
1904 ARMCC = DAG.getConstant(CondCode2, MVT::i32);
1905 SDValue Ops[] = { Res, Dest, ARMCC, CCR, Res.getValue(1) };
1906 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
1911 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) {
1912 SDValue Chain = Op.getOperand(0);
1913 SDValue Table = Op.getOperand(1);
1914 SDValue Index = Op.getOperand(2);
1915 DebugLoc dl = Op.getDebugLoc();
1917 EVT PTy = getPointerTy();
1918 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
1919 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
1920 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
1921 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
1922 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
1923 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
1924 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
1925 if (Subtarget->isThumb2()) {
1926 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
1927 // which does another jump to the destination. This also makes it easier
1928 // to translate it to TBB / TBH later.
1929 // FIXME: This might not work if the function is extremely large.
1930 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
1931 Addr, Op.getOperand(2), JTI, UId);
1933 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
1934 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
1935 PseudoSourceValue::getJumpTable(), 0);
1936 Chain = Addr.getValue(1);
1937 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
1938 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
1940 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
1941 PseudoSourceValue::getJumpTable(), 0);
1942 Chain = Addr.getValue(1);
1943 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
1947 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
1948 DebugLoc dl = Op.getDebugLoc();
1950 Op.getOpcode() == ISD::FP_TO_SINT ? ARMISD::FTOSI : ARMISD::FTOUI;
1951 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
1952 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Op);
1955 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
1956 EVT VT = Op.getValueType();
1957 DebugLoc dl = Op.getDebugLoc();
1959 Op.getOpcode() == ISD::SINT_TO_FP ? ARMISD::SITOF : ARMISD::UITOF;
1961 Op = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Op.getOperand(0));
1962 return DAG.getNode(Opc, dl, VT, Op);
1965 static SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) {
1966 // Implement fcopysign with a fabs and a conditional fneg.
1967 SDValue Tmp0 = Op.getOperand(0);
1968 SDValue Tmp1 = Op.getOperand(1);
1969 DebugLoc dl = Op.getDebugLoc();
1970 EVT VT = Op.getValueType();
1971 EVT SrcVT = Tmp1.getValueType();
1972 SDValue AbsVal = DAG.getNode(ISD::FABS, dl, VT, Tmp0);
1973 SDValue Cmp = getVFPCmp(Tmp1, DAG.getConstantFP(0.0, SrcVT), DAG, dl);
1974 SDValue ARMCC = DAG.getConstant(ARMCC::LT, MVT::i32);
1975 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
1976 return DAG.getNode(ARMISD::CNEG, dl, VT, AbsVal, AbsVal, ARMCC, CCR, Cmp);
1979 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
1980 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1981 MFI->setFrameAddressIsTaken(true);
1982 EVT VT = Op.getValueType();
1983 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
1984 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
1985 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
1986 ? ARM::R7 : ARM::R11;
1987 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
1989 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, NULL, 0);
1994 ARMTargetLowering::EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
1996 SDValue Dst, SDValue Src,
1997 SDValue Size, unsigned Align,
1999 const Value *DstSV, uint64_t DstSVOff,
2000 const Value *SrcSV, uint64_t SrcSVOff){
2001 // Do repeated 4-byte loads and stores. To be improved.
2002 // This requires 4-byte alignment.
2003 if ((Align & 3) != 0)
2005 // This requires the copy size to be a constant, preferrably
2006 // within a subtarget-specific limit.
2007 ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
2010 uint64_t SizeVal = ConstantSize->getZExtValue();
2011 if (!AlwaysInline && SizeVal > getSubtarget()->getMaxInlineSizeThreshold())
2014 unsigned BytesLeft = SizeVal & 3;
2015 unsigned NumMemOps = SizeVal >> 2;
2016 unsigned EmittedNumMemOps = 0;
2018 unsigned VTSize = 4;
2020 const unsigned MAX_LOADS_IN_LDM = 6;
2021 SDValue TFOps[MAX_LOADS_IN_LDM];
2022 SDValue Loads[MAX_LOADS_IN_LDM];
2023 uint64_t SrcOff = 0, DstOff = 0;
2025 // Emit up to MAX_LOADS_IN_LDM loads, then a TokenFactor barrier, then the
2026 // same number of stores. The loads and stores will get combined into
2027 // ldm/stm later on.
2028 while (EmittedNumMemOps < NumMemOps) {
2030 i < MAX_LOADS_IN_LDM && EmittedNumMemOps + i < NumMemOps; ++i) {
2031 Loads[i] = DAG.getLoad(VT, dl, Chain,
2032 DAG.getNode(ISD::ADD, dl, MVT::i32, Src,
2033 DAG.getConstant(SrcOff, MVT::i32)),
2034 SrcSV, SrcSVOff + SrcOff);
2035 TFOps[i] = Loads[i].getValue(1);
2038 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &TFOps[0], i);
2041 i < MAX_LOADS_IN_LDM && EmittedNumMemOps + i < NumMemOps; ++i) {
2042 TFOps[i] = DAG.getStore(Chain, dl, Loads[i],
2043 DAG.getNode(ISD::ADD, dl, MVT::i32, Dst,
2044 DAG.getConstant(DstOff, MVT::i32)),
2045 DstSV, DstSVOff + DstOff);
2048 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &TFOps[0], i);
2050 EmittedNumMemOps += i;
2056 // Issue loads / stores for the trailing (1 - 3) bytes.
2057 unsigned BytesLeftSave = BytesLeft;
2060 if (BytesLeft >= 2) {
2068 Loads[i] = DAG.getLoad(VT, dl, Chain,
2069 DAG.getNode(ISD::ADD, dl, MVT::i32, Src,
2070 DAG.getConstant(SrcOff, MVT::i32)),
2071 SrcSV, SrcSVOff + SrcOff);
2072 TFOps[i] = Loads[i].getValue(1);
2075 BytesLeft -= VTSize;
2077 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &TFOps[0], i);
2080 BytesLeft = BytesLeftSave;
2082 if (BytesLeft >= 2) {
2090 TFOps[i] = DAG.getStore(Chain, dl, Loads[i],
2091 DAG.getNode(ISD::ADD, dl, MVT::i32, Dst,
2092 DAG.getConstant(DstOff, MVT::i32)),
2093 DstSV, DstSVOff + DstOff);
2096 BytesLeft -= VTSize;
2098 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &TFOps[0], i);
2101 static SDValue ExpandBIT_CONVERT(SDNode *N, SelectionDAG &DAG) {
2102 SDValue Op = N->getOperand(0);
2103 DebugLoc dl = N->getDebugLoc();
2104 if (N->getValueType(0) == MVT::f64) {
2105 // Turn i64->f64 into VMOVDRR.
2106 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
2107 DAG.getConstant(0, MVT::i32));
2108 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
2109 DAG.getConstant(1, MVT::i32));
2110 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
2113 // Turn f64->i64 into VMOVRRD.
2114 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
2115 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
2117 // Merge the pieces into a single i64 value.
2118 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
2121 /// getZeroVector - Returns a vector of specified type with all zero elements.
2123 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
2124 assert(VT.isVector() && "Expected a vector type");
2126 // Zero vectors are used to represent vector negation and in those cases
2127 // will be implemented with the NEON VNEG instruction. However, VNEG does
2128 // not support i64 elements, so sometimes the zero vectors will need to be
2129 // explicitly constructed. For those cases, and potentially other uses in
2130 // the future, always build zero vectors as <16 x i8> or <8 x i8> bitcasted
2131 // to their dest type. This ensures they get CSE'd.
2133 SDValue Cst = DAG.getTargetConstant(0, MVT::i8);
2134 SmallVector<SDValue, 8> Ops;
2137 if (VT.getSizeInBits() == 64) {
2138 Ops.assign(8, Cst); TVT = MVT::v8i8;
2140 Ops.assign(16, Cst); TVT = MVT::v16i8;
2142 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, TVT, &Ops[0], Ops.size());
2144 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
2147 /// getOnesVector - Returns a vector of specified type with all bits set.
2149 static SDValue getOnesVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
2150 assert(VT.isVector() && "Expected a vector type");
2152 // Always build ones vectors as <16 x i8> or <8 x i8> bitcasted to their
2153 // dest type. This ensures they get CSE'd.
2155 SDValue Cst = DAG.getTargetConstant(0xFF, MVT::i8);
2156 SmallVector<SDValue, 8> Ops;
2159 if (VT.getSizeInBits() == 64) {
2160 Ops.assign(8, Cst); TVT = MVT::v8i8;
2162 Ops.assign(16, Cst); TVT = MVT::v16i8;
2164 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, TVT, &Ops[0], Ops.size());
2166 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
2169 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
2170 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
2171 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op, SelectionDAG &DAG) {
2172 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
2173 EVT VT = Op.getValueType();
2174 unsigned VTBits = VT.getSizeInBits();
2175 DebugLoc dl = Op.getDebugLoc();
2176 SDValue ShOpLo = Op.getOperand(0);
2177 SDValue ShOpHi = Op.getOperand(1);
2178 SDValue ShAmt = Op.getOperand(2);
2180 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
2182 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
2184 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
2185 DAG.getConstant(VTBits, MVT::i32), ShAmt);
2186 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
2187 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
2188 DAG.getConstant(VTBits, MVT::i32));
2189 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
2190 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
2191 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
2193 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2194 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
2196 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
2197 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMCC,
2200 SDValue Ops[2] = { Lo, Hi };
2201 return DAG.getMergeValues(Ops, 2, dl);
2204 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
2205 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
2206 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op, SelectionDAG &DAG) {
2207 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
2208 EVT VT = Op.getValueType();
2209 unsigned VTBits = VT.getSizeInBits();
2210 DebugLoc dl = Op.getDebugLoc();
2211 SDValue ShOpLo = Op.getOperand(0);
2212 SDValue ShOpHi = Op.getOperand(1);
2213 SDValue ShAmt = Op.getOperand(2);
2216 assert(Op.getOpcode() == ISD::SHL_PARTS);
2217 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
2218 DAG.getConstant(VTBits, MVT::i32), ShAmt);
2219 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
2220 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
2221 DAG.getConstant(VTBits, MVT::i32));
2222 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
2223 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
2225 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
2226 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2227 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
2229 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
2230 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMCC,
2233 SDValue Ops[2] = { Lo, Hi };
2234 return DAG.getMergeValues(Ops, 2, dl);
2237 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
2238 const ARMSubtarget *ST) {
2239 EVT VT = N->getValueType(0);
2240 DebugLoc dl = N->getDebugLoc();
2242 if (!ST->hasV6T2Ops())
2245 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
2246 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
2249 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
2250 const ARMSubtarget *ST) {
2251 EVT VT = N->getValueType(0);
2252 DebugLoc dl = N->getDebugLoc();
2254 // Lower vector shifts on NEON to use VSHL.
2255 if (VT.isVector()) {
2256 assert(ST->hasNEON() && "unexpected vector shift");
2258 // Left shifts translate directly to the vshiftu intrinsic.
2259 if (N->getOpcode() == ISD::SHL)
2260 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
2261 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
2262 N->getOperand(0), N->getOperand(1));
2264 assert((N->getOpcode() == ISD::SRA ||
2265 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
2267 // NEON uses the same intrinsics for both left and right shifts. For
2268 // right shifts, the shift amounts are negative, so negate the vector of
2270 EVT ShiftVT = N->getOperand(1).getValueType();
2271 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
2272 getZeroVector(ShiftVT, DAG, dl),
2274 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
2275 Intrinsic::arm_neon_vshifts :
2276 Intrinsic::arm_neon_vshiftu);
2277 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
2278 DAG.getConstant(vshiftInt, MVT::i32),
2279 N->getOperand(0), NegatedCount);
2282 // We can get here for a node like i32 = ISD::SHL i32, i64
2286 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
2287 "Unknown shift to lower!");
2289 // We only lower SRA, SRL of 1 here, all others use generic lowering.
2290 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
2291 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
2294 // If we are in thumb mode, we don't have RRX.
2295 if (ST->isThumb1Only()) return SDValue();
2297 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
2298 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
2299 DAG.getConstant(0, MVT::i32));
2300 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
2301 DAG.getConstant(1, MVT::i32));
2303 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
2304 // captures the result into a carry flag.
2305 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
2306 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Flag), &Hi, 1);
2308 // The low part is an ARMISD::RRX operand, which shifts the carry in.
2309 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
2311 // Merge the pieces into a single i64 value.
2312 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
2315 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
2316 SDValue TmpOp0, TmpOp1;
2317 bool Invert = false;
2321 SDValue Op0 = Op.getOperand(0);
2322 SDValue Op1 = Op.getOperand(1);
2323 SDValue CC = Op.getOperand(2);
2324 EVT VT = Op.getValueType();
2325 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
2326 DebugLoc dl = Op.getDebugLoc();
2328 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
2329 switch (SetCCOpcode) {
2330 default: llvm_unreachable("Illegal FP comparison"); break;
2332 case ISD::SETNE: Invert = true; // Fallthrough
2334 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
2336 case ISD::SETLT: Swap = true; // Fallthrough
2338 case ISD::SETGT: Opc = ARMISD::VCGT; break;
2340 case ISD::SETLE: Swap = true; // Fallthrough
2342 case ISD::SETGE: Opc = ARMISD::VCGE; break;
2343 case ISD::SETUGE: Swap = true; // Fallthrough
2344 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
2345 case ISD::SETUGT: Swap = true; // Fallthrough
2346 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
2347 case ISD::SETUEQ: Invert = true; // Fallthrough
2349 // Expand this to (OLT | OGT).
2353 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
2354 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
2356 case ISD::SETUO: Invert = true; // Fallthrough
2358 // Expand this to (OLT | OGE).
2362 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
2363 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
2367 // Integer comparisons.
2368 switch (SetCCOpcode) {
2369 default: llvm_unreachable("Illegal integer comparison"); break;
2370 case ISD::SETNE: Invert = true;
2371 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
2372 case ISD::SETLT: Swap = true;
2373 case ISD::SETGT: Opc = ARMISD::VCGT; break;
2374 case ISD::SETLE: Swap = true;
2375 case ISD::SETGE: Opc = ARMISD::VCGE; break;
2376 case ISD::SETULT: Swap = true;
2377 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
2378 case ISD::SETULE: Swap = true;
2379 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
2382 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
2383 if (Opc == ARMISD::VCEQ) {
2386 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
2388 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
2391 // Ignore bitconvert.
2392 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BIT_CONVERT)
2393 AndOp = AndOp.getOperand(0);
2395 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
2397 Op0 = DAG.getNode(ISD::BIT_CONVERT, dl, VT, AndOp.getOperand(0));
2398 Op1 = DAG.getNode(ISD::BIT_CONVERT, dl, VT, AndOp.getOperand(1));
2405 std::swap(Op0, Op1);
2407 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
2410 Result = DAG.getNOT(dl, Result, VT);
2415 /// isVMOVSplat - Check if the specified splat value corresponds to an immediate
2416 /// VMOV instruction, and if so, return the constant being splatted.
2417 static SDValue isVMOVSplat(uint64_t SplatBits, uint64_t SplatUndef,
2418 unsigned SplatBitSize, SelectionDAG &DAG) {
2419 switch (SplatBitSize) {
2421 // Any 1-byte value is OK.
2422 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
2423 return DAG.getTargetConstant(SplatBits, MVT::i8);
2426 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
2427 if ((SplatBits & ~0xff) == 0 ||
2428 (SplatBits & ~0xff00) == 0)
2429 return DAG.getTargetConstant(SplatBits, MVT::i16);
2433 // NEON's 32-bit VMOV supports splat values where:
2434 // * only one byte is nonzero, or
2435 // * the least significant byte is 0xff and the second byte is nonzero, or
2436 // * the least significant 2 bytes are 0xff and the third is nonzero.
2437 if ((SplatBits & ~0xff) == 0 ||
2438 (SplatBits & ~0xff00) == 0 ||
2439 (SplatBits & ~0xff0000) == 0 ||
2440 (SplatBits & ~0xff000000) == 0)
2441 return DAG.getTargetConstant(SplatBits, MVT::i32);
2443 if ((SplatBits & ~0xffff) == 0 &&
2444 ((SplatBits | SplatUndef) & 0xff) == 0xff)
2445 return DAG.getTargetConstant(SplatBits | 0xff, MVT::i32);
2447 if ((SplatBits & ~0xffffff) == 0 &&
2448 ((SplatBits | SplatUndef) & 0xffff) == 0xffff)
2449 return DAG.getTargetConstant(SplatBits | 0xffff, MVT::i32);
2451 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
2452 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
2453 // VMOV.I32. A (very) minor optimization would be to replicate the value
2454 // and fall through here to test for a valid 64-bit splat. But, then the
2455 // caller would also need to check and handle the change in size.
2459 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
2460 uint64_t BitMask = 0xff;
2462 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
2463 if (((SplatBits | SplatUndef) & BitMask) == BitMask)
2465 else if ((SplatBits & BitMask) != 0)
2469 return DAG.getTargetConstant(Val, MVT::i64);
2473 llvm_unreachable("unexpected size for isVMOVSplat");
2480 /// getVMOVImm - If this is a build_vector of constants which can be
2481 /// formed by using a VMOV instruction of the specified element size,
2482 /// return the constant being splatted. The ByteSize field indicates the
2483 /// number of bytes of each element [1248].
2484 SDValue ARM::getVMOVImm(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) {
2485 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N);
2486 APInt SplatBits, SplatUndef;
2487 unsigned SplatBitSize;
2489 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
2490 HasAnyUndefs, ByteSize * 8))
2493 if (SplatBitSize > ByteSize * 8)
2496 return isVMOVSplat(SplatBits.getZExtValue(), SplatUndef.getZExtValue(),
2500 static bool isVEXTMask(const SmallVectorImpl<int> &M, EVT VT,
2501 bool &ReverseVEXT, unsigned &Imm) {
2502 unsigned NumElts = VT.getVectorNumElements();
2503 ReverseVEXT = false;
2506 // If this is a VEXT shuffle, the immediate value is the index of the first
2507 // element. The other shuffle indices must be the successive elements after
2509 unsigned ExpectedElt = Imm;
2510 for (unsigned i = 1; i < NumElts; ++i) {
2511 // Increment the expected index. If it wraps around, it may still be
2512 // a VEXT but the source vectors must be swapped.
2514 if (ExpectedElt == NumElts * 2) {
2519 if (ExpectedElt != static_cast<unsigned>(M[i]))
2523 // Adjust the index value if the source operands will be swapped.
2530 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
2531 /// instruction with the specified blocksize. (The order of the elements
2532 /// within each block of the vector is reversed.)
2533 static bool isVREVMask(const SmallVectorImpl<int> &M, EVT VT,
2534 unsigned BlockSize) {
2535 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
2536 "Only possible block sizes for VREV are: 16, 32, 64");
2538 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2542 unsigned NumElts = VT.getVectorNumElements();
2543 unsigned BlockElts = M[0] + 1;
2545 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
2548 for (unsigned i = 0; i < NumElts; ++i) {
2549 if ((unsigned) M[i] !=
2550 (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
2557 static bool isVTRNMask(const SmallVectorImpl<int> &M, EVT VT,
2558 unsigned &WhichResult) {
2559 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2563 unsigned NumElts = VT.getVectorNumElements();
2564 WhichResult = (M[0] == 0 ? 0 : 1);
2565 for (unsigned i = 0; i < NumElts; i += 2) {
2566 if ((unsigned) M[i] != i + WhichResult ||
2567 (unsigned) M[i+1] != i + NumElts + WhichResult)
2573 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
2574 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
2575 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
2576 static bool isVTRN_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
2577 unsigned &WhichResult) {
2578 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2582 unsigned NumElts = VT.getVectorNumElements();
2583 WhichResult = (M[0] == 0 ? 0 : 1);
2584 for (unsigned i = 0; i < NumElts; i += 2) {
2585 if ((unsigned) M[i] != i + WhichResult ||
2586 (unsigned) M[i+1] != i + WhichResult)
2592 static bool isVUZPMask(const SmallVectorImpl<int> &M, EVT VT,
2593 unsigned &WhichResult) {
2594 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2598 unsigned NumElts = VT.getVectorNumElements();
2599 WhichResult = (M[0] == 0 ? 0 : 1);
2600 for (unsigned i = 0; i != NumElts; ++i) {
2601 if ((unsigned) M[i] != 2 * i + WhichResult)
2605 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
2606 if (VT.is64BitVector() && EltSz == 32)
2612 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
2613 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
2614 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
2615 static bool isVUZP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
2616 unsigned &WhichResult) {
2617 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2621 unsigned Half = VT.getVectorNumElements() / 2;
2622 WhichResult = (M[0] == 0 ? 0 : 1);
2623 for (unsigned j = 0; j != 2; ++j) {
2624 unsigned Idx = WhichResult;
2625 for (unsigned i = 0; i != Half; ++i) {
2626 if ((unsigned) M[i + j * Half] != Idx)
2632 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
2633 if (VT.is64BitVector() && EltSz == 32)
2639 static bool isVZIPMask(const SmallVectorImpl<int> &M, EVT VT,
2640 unsigned &WhichResult) {
2641 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2645 unsigned NumElts = VT.getVectorNumElements();
2646 WhichResult = (M[0] == 0 ? 0 : 1);
2647 unsigned Idx = WhichResult * NumElts / 2;
2648 for (unsigned i = 0; i != NumElts; i += 2) {
2649 if ((unsigned) M[i] != Idx ||
2650 (unsigned) M[i+1] != Idx + NumElts)
2655 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
2656 if (VT.is64BitVector() && EltSz == 32)
2662 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
2663 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
2664 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
2665 static bool isVZIP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
2666 unsigned &WhichResult) {
2667 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
2671 unsigned NumElts = VT.getVectorNumElements();
2672 WhichResult = (M[0] == 0 ? 0 : 1);
2673 unsigned Idx = WhichResult * NumElts / 2;
2674 for (unsigned i = 0; i != NumElts; i += 2) {
2675 if ((unsigned) M[i] != Idx ||
2676 (unsigned) M[i+1] != Idx)
2681 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
2682 if (VT.is64BitVector() && EltSz == 32)
2689 static SDValue BuildSplat(SDValue Val, EVT VT, SelectionDAG &DAG, DebugLoc dl) {
2690 // Canonicalize all-zeros and all-ones vectors.
2691 ConstantSDNode *ConstVal = cast<ConstantSDNode>(Val.getNode());
2692 if (ConstVal->isNullValue())
2693 return getZeroVector(VT, DAG, dl);
2694 if (ConstVal->isAllOnesValue())
2695 return getOnesVector(VT, DAG, dl);
2698 if (VT.is64BitVector()) {
2699 switch (Val.getValueType().getSizeInBits()) {
2700 case 8: CanonicalVT = MVT::v8i8; break;
2701 case 16: CanonicalVT = MVT::v4i16; break;
2702 case 32: CanonicalVT = MVT::v2i32; break;
2703 case 64: CanonicalVT = MVT::v1i64; break;
2704 default: llvm_unreachable("unexpected splat element type"); break;
2707 assert(VT.is128BitVector() && "unknown splat vector size");
2708 switch (Val.getValueType().getSizeInBits()) {
2709 case 8: CanonicalVT = MVT::v16i8; break;
2710 case 16: CanonicalVT = MVT::v8i16; break;
2711 case 32: CanonicalVT = MVT::v4i32; break;
2712 case 64: CanonicalVT = MVT::v2i64; break;
2713 default: llvm_unreachable("unexpected splat element type"); break;
2717 // Build a canonical splat for this value.
2718 SmallVector<SDValue, 8> Ops;
2719 Ops.assign(CanonicalVT.getVectorNumElements(), Val);
2720 SDValue Res = DAG.getNode(ISD::BUILD_VECTOR, dl, CanonicalVT, &Ops[0],
2722 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Res);
2725 // If this is a case we can't handle, return null and let the default
2726 // expansion code take care of it.
2727 static SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) {
2728 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
2729 DebugLoc dl = Op.getDebugLoc();
2730 EVT VT = Op.getValueType();
2732 APInt SplatBits, SplatUndef;
2733 unsigned SplatBitSize;
2735 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
2736 if (SplatBitSize <= 64) {
2737 SDValue Val = isVMOVSplat(SplatBits.getZExtValue(),
2738 SplatUndef.getZExtValue(), SplatBitSize, DAG);
2740 return BuildSplat(Val, VT, DAG, dl);
2744 // If there are only 2 elements in a 128-bit vector, insert them into an
2745 // undef vector. This handles the common case for 128-bit vector argument
2746 // passing, where the insertions should be translated to subreg accesses
2747 // with no real instructions.
2748 if (VT.is128BitVector() && Op.getNumOperands() == 2) {
2749 SDValue Val = DAG.getUNDEF(VT);
2750 SDValue Op0 = Op.getOperand(0);
2751 SDValue Op1 = Op.getOperand(1);
2752 if (Op0.getOpcode() != ISD::UNDEF)
2753 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Val, Op0,
2754 DAG.getIntPtrConstant(0));
2755 if (Op1.getOpcode() != ISD::UNDEF)
2756 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Val, Op1,
2757 DAG.getIntPtrConstant(1));
2764 /// isShuffleMaskLegal - Targets can use this to indicate that they only
2765 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
2766 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
2767 /// are assumed to be legal.
2769 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
2771 if (VT.getVectorNumElements() == 4 &&
2772 (VT.is128BitVector() || VT.is64BitVector())) {
2773 unsigned PFIndexes[4];
2774 for (unsigned i = 0; i != 4; ++i) {
2778 PFIndexes[i] = M[i];
2781 // Compute the index in the perfect shuffle table.
2782 unsigned PFTableIndex =
2783 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
2784 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
2785 unsigned Cost = (PFEntry >> 30);
2792 unsigned Imm, WhichResult;
2794 return (ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
2795 isVREVMask(M, VT, 64) ||
2796 isVREVMask(M, VT, 32) ||
2797 isVREVMask(M, VT, 16) ||
2798 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
2799 isVTRNMask(M, VT, WhichResult) ||
2800 isVUZPMask(M, VT, WhichResult) ||
2801 isVZIPMask(M, VT, WhichResult) ||
2802 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
2803 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
2804 isVZIP_v_undef_Mask(M, VT, WhichResult));
2807 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
2808 /// the specified operations to build the shuffle.
2809 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
2810 SDValue RHS, SelectionDAG &DAG,
2812 unsigned OpNum = (PFEntry >> 26) & 0x0F;
2813 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
2814 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
2817 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
2826 OP_VUZPL, // VUZP, left result
2827 OP_VUZPR, // VUZP, right result
2828 OP_VZIPL, // VZIP, left result
2829 OP_VZIPR, // VZIP, right result
2830 OP_VTRNL, // VTRN, left result
2831 OP_VTRNR // VTRN, right result
2834 if (OpNum == OP_COPY) {
2835 if (LHSID == (1*9+2)*9+3) return LHS;
2836 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
2840 SDValue OpLHS, OpRHS;
2841 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
2842 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
2843 EVT VT = OpLHS.getValueType();
2846 default: llvm_unreachable("Unknown shuffle opcode!");
2848 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
2853 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
2854 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
2858 return DAG.getNode(ARMISD::VEXT, dl, VT,
2860 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
2863 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
2864 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
2867 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
2868 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
2871 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
2872 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
2876 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
2877 SDValue V1 = Op.getOperand(0);
2878 SDValue V2 = Op.getOperand(1);
2879 DebugLoc dl = Op.getDebugLoc();
2880 EVT VT = Op.getValueType();
2881 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
2882 SmallVector<int, 8> ShuffleMask;
2884 // Convert shuffles that are directly supported on NEON to target-specific
2885 // DAG nodes, instead of keeping them as shuffles and matching them again
2886 // during code selection. This is more efficient and avoids the possibility
2887 // of inconsistencies between legalization and selection.
2888 // FIXME: floating-point vectors should be canonicalized to integer vectors
2889 // of the same time so that they get CSEd properly.
2890 SVN->getMask(ShuffleMask);
2892 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
2893 int Lane = SVN->getSplatIndex();
2894 // If this is undef splat, generate it via "just" vdup, if possible.
2895 if (Lane == -1) Lane = 0;
2897 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
2898 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
2900 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
2901 DAG.getConstant(Lane, MVT::i32));
2906 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
2909 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
2910 DAG.getConstant(Imm, MVT::i32));
2913 if (isVREVMask(ShuffleMask, VT, 64))
2914 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
2915 if (isVREVMask(ShuffleMask, VT, 32))
2916 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
2917 if (isVREVMask(ShuffleMask, VT, 16))
2918 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
2920 // Check for Neon shuffles that modify both input vectors in place.
2921 // If both results are used, i.e., if there are two shuffles with the same
2922 // source operands and with masks corresponding to both results of one of
2923 // these operations, DAG memoization will ensure that a single node is
2924 // used for both shuffles.
2925 unsigned WhichResult;
2926 if (isVTRNMask(ShuffleMask, VT, WhichResult))
2927 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
2928 V1, V2).getValue(WhichResult);
2929 if (isVUZPMask(ShuffleMask, VT, WhichResult))
2930 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
2931 V1, V2).getValue(WhichResult);
2932 if (isVZIPMask(ShuffleMask, VT, WhichResult))
2933 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
2934 V1, V2).getValue(WhichResult);
2936 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
2937 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
2938 V1, V1).getValue(WhichResult);
2939 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
2940 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
2941 V1, V1).getValue(WhichResult);
2942 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
2943 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
2944 V1, V1).getValue(WhichResult);
2946 // If the shuffle is not directly supported and it has 4 elements, use
2947 // the PerfectShuffle-generated table to synthesize it from other shuffles.
2948 if (VT.getVectorNumElements() == 4 &&
2949 (VT.is128BitVector() || VT.is64BitVector())) {
2950 unsigned PFIndexes[4];
2951 for (unsigned i = 0; i != 4; ++i) {
2952 if (ShuffleMask[i] < 0)
2955 PFIndexes[i] = ShuffleMask[i];
2958 // Compute the index in the perfect shuffle table.
2959 unsigned PFTableIndex =
2960 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
2962 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
2963 unsigned Cost = (PFEntry >> 30);
2966 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
2972 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
2973 EVT VT = Op.getValueType();
2974 DebugLoc dl = Op.getDebugLoc();
2975 SDValue Vec = Op.getOperand(0);
2976 SDValue Lane = Op.getOperand(1);
2977 assert(VT == MVT::i32 &&
2978 Vec.getValueType().getVectorElementType().getSizeInBits() < 32 &&
2979 "unexpected type for custom-lowering vector extract");
2980 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
2983 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
2984 // The only time a CONCAT_VECTORS operation can have legal types is when
2985 // two 64-bit vectors are concatenated to a 128-bit vector.
2986 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
2987 "unexpected CONCAT_VECTORS");
2988 DebugLoc dl = Op.getDebugLoc();
2989 SDValue Val = DAG.getUNDEF(MVT::v2f64);
2990 SDValue Op0 = Op.getOperand(0);
2991 SDValue Op1 = Op.getOperand(1);
2992 if (Op0.getOpcode() != ISD::UNDEF)
2993 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
2994 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, Op0),
2995 DAG.getIntPtrConstant(0));
2996 if (Op1.getOpcode() != ISD::UNDEF)
2997 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
2998 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, Op1),
2999 DAG.getIntPtrConstant(1));
3000 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(), Val);
3003 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
3004 switch (Op.getOpcode()) {
3005 default: llvm_unreachable("Don't know how to custom lower this!");
3006 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
3007 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
3008 case ISD::GlobalAddress:
3009 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
3010 LowerGlobalAddressELF(Op, DAG);
3011 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
3012 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
3013 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
3014 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
3015 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
3016 case ISD::VASTART: return LowerVASTART(Op, DAG, VarArgsFrameIndex);
3017 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
3018 case ISD::SINT_TO_FP:
3019 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
3020 case ISD::FP_TO_SINT:
3021 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
3022 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
3023 case ISD::RETURNADDR: break;
3024 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
3025 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
3026 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
3027 case ISD::BIT_CONVERT: return ExpandBIT_CONVERT(Op.getNode(), DAG);
3030 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
3031 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
3032 case ISD::SRL_PARTS:
3033 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
3034 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
3035 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
3036 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
3037 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
3038 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
3039 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
3044 /// ReplaceNodeResults - Replace the results of node with an illegal result
3045 /// type with new values built out of custom code.
3046 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
3047 SmallVectorImpl<SDValue>&Results,
3048 SelectionDAG &DAG) {
3049 switch (N->getOpcode()) {
3051 llvm_unreachable("Don't know how to custom expand this!");
3053 case ISD::BIT_CONVERT:
3054 Results.push_back(ExpandBIT_CONVERT(N, DAG));
3058 SDValue Res = LowerShift(N, DAG, Subtarget);
3060 Results.push_back(Res);
3066 //===----------------------------------------------------------------------===//
3067 // ARM Scheduler Hooks
3068 //===----------------------------------------------------------------------===//
3071 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
3072 MachineBasicBlock *BB,
3073 unsigned Size) const {
3074 unsigned dest = MI->getOperand(0).getReg();
3075 unsigned ptr = MI->getOperand(1).getReg();
3076 unsigned oldval = MI->getOperand(2).getReg();
3077 unsigned newval = MI->getOperand(3).getReg();
3078 unsigned scratch = BB->getParent()->getRegInfo()
3079 .createVirtualRegister(ARM::GPRRegisterClass);
3080 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
3081 DebugLoc dl = MI->getDebugLoc();
3082 bool isThumb2 = Subtarget->isThumb2();
3084 unsigned ldrOpc, strOpc;
3086 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
3088 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
3089 strOpc = isThumb2 ? ARM::t2LDREXB : ARM::STREXB;
3092 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
3093 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
3096 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
3097 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
3101 MachineFunction *MF = BB->getParent();
3102 const BasicBlock *LLVM_BB = BB->getBasicBlock();
3103 MachineFunction::iterator It = BB;
3104 ++It; // insert the new blocks after the current block
3106 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
3107 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
3108 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
3109 MF->insert(It, loop1MBB);
3110 MF->insert(It, loop2MBB);
3111 MF->insert(It, exitMBB);
3112 exitMBB->transferSuccessors(BB);
3116 // fallthrough --> loop1MBB
3117 BB->addSuccessor(loop1MBB);
3120 // ldrex dest, [ptr]
3124 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr));
3125 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
3126 .addReg(dest).addReg(oldval));
3127 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
3128 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
3129 BB->addSuccessor(loop2MBB);
3130 BB->addSuccessor(exitMBB);
3133 // strex scratch, newval, [ptr]
3137 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval)
3139 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
3140 .addReg(scratch).addImm(0));
3141 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
3142 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
3143 BB->addSuccessor(loop1MBB);
3144 BB->addSuccessor(exitMBB);
3150 MF->DeleteMachineInstr(MI); // The instruction is gone now.
3156 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
3157 unsigned Size, unsigned BinOpcode) const {
3158 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
3159 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
3161 const BasicBlock *LLVM_BB = BB->getBasicBlock();
3162 MachineFunction *MF = BB->getParent();
3163 MachineFunction::iterator It = BB;
3166 unsigned dest = MI->getOperand(0).getReg();
3167 unsigned ptr = MI->getOperand(1).getReg();
3168 unsigned incr = MI->getOperand(2).getReg();
3169 DebugLoc dl = MI->getDebugLoc();
3171 bool isThumb2 = Subtarget->isThumb2();
3172 unsigned ldrOpc, strOpc;
3174 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
3176 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
3177 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
3180 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
3181 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
3184 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
3185 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
3189 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
3190 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
3191 MF->insert(It, loopMBB);
3192 MF->insert(It, exitMBB);
3193 exitMBB->transferSuccessors(BB);
3195 MachineRegisterInfo &RegInfo = MF->getRegInfo();
3196 unsigned scratch = RegInfo.createVirtualRegister(ARM::GPRRegisterClass);
3197 unsigned scratch2 = (!BinOpcode) ? incr :
3198 RegInfo.createVirtualRegister(ARM::GPRRegisterClass);
3202 // fallthrough --> loopMBB
3203 BB->addSuccessor(loopMBB);
3207 // <binop> scratch2, dest, incr
3208 // strex scratch, scratch2, ptr
3211 // fallthrough --> exitMBB
3213 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr));
3215 // operand order needs to go the other way for NAND
3216 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
3217 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
3218 addReg(incr).addReg(dest)).addReg(0);
3220 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
3221 addReg(dest).addReg(incr)).addReg(0);
3224 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2)
3226 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
3227 .addReg(scratch).addImm(0));
3228 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
3229 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
3231 BB->addSuccessor(loopMBB);
3232 BB->addSuccessor(exitMBB);
3238 MF->DeleteMachineInstr(MI); // The instruction is gone now.
3244 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
3245 MachineBasicBlock *BB,
3246 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const {
3247 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
3248 DebugLoc dl = MI->getDebugLoc();
3249 bool isThumb2 = Subtarget->isThumb2();
3250 switch (MI->getOpcode()) {
3253 llvm_unreachable("Unexpected instr type to insert");
3255 case ARM::ATOMIC_LOAD_ADD_I8:
3256 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
3257 case ARM::ATOMIC_LOAD_ADD_I16:
3258 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
3259 case ARM::ATOMIC_LOAD_ADD_I32:
3260 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
3262 case ARM::ATOMIC_LOAD_AND_I8:
3263 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
3264 case ARM::ATOMIC_LOAD_AND_I16:
3265 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
3266 case ARM::ATOMIC_LOAD_AND_I32:
3267 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
3269 case ARM::ATOMIC_LOAD_OR_I8:
3270 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
3271 case ARM::ATOMIC_LOAD_OR_I16:
3272 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
3273 case ARM::ATOMIC_LOAD_OR_I32:
3274 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
3276 case ARM::ATOMIC_LOAD_XOR_I8:
3277 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
3278 case ARM::ATOMIC_LOAD_XOR_I16:
3279 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
3280 case ARM::ATOMIC_LOAD_XOR_I32:
3281 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
3283 case ARM::ATOMIC_LOAD_NAND_I8:
3284 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
3285 case ARM::ATOMIC_LOAD_NAND_I16:
3286 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
3287 case ARM::ATOMIC_LOAD_NAND_I32:
3288 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
3290 case ARM::ATOMIC_LOAD_SUB_I8:
3291 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
3292 case ARM::ATOMIC_LOAD_SUB_I16:
3293 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
3294 case ARM::ATOMIC_LOAD_SUB_I32:
3295 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
3297 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
3298 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
3299 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
3301 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
3302 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
3303 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
3305 case ARM::tMOVCCr_pseudo: {
3306 // To "insert" a SELECT_CC instruction, we actually have to insert the
3307 // diamond control-flow pattern. The incoming instruction knows the
3308 // destination vreg to set, the condition code register to branch on, the
3309 // true/false values to select between, and a branch opcode to use.
3310 const BasicBlock *LLVM_BB = BB->getBasicBlock();
3311 MachineFunction::iterator It = BB;
3317 // cmpTY ccX, r1, r2
3319 // fallthrough --> copy0MBB
3320 MachineBasicBlock *thisMBB = BB;
3321 MachineFunction *F = BB->getParent();
3322 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
3323 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
3324 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
3325 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
3326 F->insert(It, copy0MBB);
3327 F->insert(It, sinkMBB);
3328 // Update machine-CFG edges by first adding all successors of the current
3329 // block to the new block which will contain the Phi node for the select.
3330 // Also inform sdisel of the edge changes.
3331 for (MachineBasicBlock::succ_iterator I = BB->succ_begin(),
3332 E = BB->succ_end(); I != E; ++I) {
3333 EM->insert(std::make_pair(*I, sinkMBB));
3334 sinkMBB->addSuccessor(*I);
3336 // Next, remove all successors of the current block, and add the true
3337 // and fallthrough blocks as its successors.
3338 while (!BB->succ_empty())
3339 BB->removeSuccessor(BB->succ_begin());
3340 BB->addSuccessor(copy0MBB);
3341 BB->addSuccessor(sinkMBB);
3344 // %FalseValue = ...
3345 // # fallthrough to sinkMBB
3348 // Update machine-CFG edges
3349 BB->addSuccessor(sinkMBB);
3352 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
3355 BuildMI(BB, dl, TII->get(ARM::PHI), MI->getOperand(0).getReg())
3356 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
3357 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
3359 F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
3366 case ARM::t2SUBrSPi_:
3367 case ARM::t2SUBrSPi12_:
3368 case ARM::t2SUBrSPs_: {
3369 MachineFunction *MF = BB->getParent();
3370 unsigned DstReg = MI->getOperand(0).getReg();
3371 unsigned SrcReg = MI->getOperand(1).getReg();
3372 bool DstIsDead = MI->getOperand(0).isDead();
3373 bool SrcIsKill = MI->getOperand(1).isKill();
3375 if (SrcReg != ARM::SP) {
3376 // Copy the source to SP from virtual register.
3377 const TargetRegisterClass *RC = MF->getRegInfo().getRegClass(SrcReg);
3378 unsigned CopyOpc = (RC == ARM::tGPRRegisterClass)
3379 ? ARM::tMOVtgpr2gpr : ARM::tMOVgpr2gpr;
3380 BuildMI(BB, dl, TII->get(CopyOpc), ARM::SP)
3381 .addReg(SrcReg, getKillRegState(SrcIsKill));
3385 bool NeedPred = false, NeedCC = false, NeedOp3 = false;
3386 switch (MI->getOpcode()) {
3388 llvm_unreachable("Unexpected pseudo instruction!");
3394 OpOpc = ARM::tADDspr;
3397 OpOpc = ARM::tSUBspi;
3399 case ARM::t2SUBrSPi_:
3400 OpOpc = ARM::t2SUBrSPi;
3401 NeedPred = true; NeedCC = true;
3403 case ARM::t2SUBrSPi12_:
3404 OpOpc = ARM::t2SUBrSPi12;
3407 case ARM::t2SUBrSPs_:
3408 OpOpc = ARM::t2SUBrSPs;
3409 NeedPred = true; NeedCC = true; NeedOp3 = true;
3412 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(OpOpc), ARM::SP);
3413 if (OpOpc == ARM::tAND)
3414 AddDefaultT1CC(MIB);
3415 MIB.addReg(ARM::SP);
3416 MIB.addOperand(MI->getOperand(2));
3418 MIB.addOperand(MI->getOperand(3));
3420 AddDefaultPred(MIB);
3424 // Copy the result from SP to virtual register.
3425 const TargetRegisterClass *RC = MF->getRegInfo().getRegClass(DstReg);
3426 unsigned CopyOpc = (RC == ARM::tGPRRegisterClass)
3427 ? ARM::tMOVgpr2tgpr : ARM::tMOVgpr2gpr;
3428 BuildMI(BB, dl, TII->get(CopyOpc))
3429 .addReg(DstReg, getDefRegState(true) | getDeadRegState(DstIsDead))
3431 MF->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
3437 //===----------------------------------------------------------------------===//
3438 // ARM Optimization Hooks
3439 //===----------------------------------------------------------------------===//
3442 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
3443 TargetLowering::DAGCombinerInfo &DCI) {
3444 SelectionDAG &DAG = DCI.DAG;
3445 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3446 EVT VT = N->getValueType(0);
3447 unsigned Opc = N->getOpcode();
3448 bool isSlctCC = Slct.getOpcode() == ISD::SELECT_CC;
3449 SDValue LHS = isSlctCC ? Slct.getOperand(2) : Slct.getOperand(1);
3450 SDValue RHS = isSlctCC ? Slct.getOperand(3) : Slct.getOperand(2);
3451 ISD::CondCode CC = ISD::SETCC_INVALID;
3454 CC = cast<CondCodeSDNode>(Slct.getOperand(4))->get();
3456 SDValue CCOp = Slct.getOperand(0);
3457 if (CCOp.getOpcode() == ISD::SETCC)
3458 CC = cast<CondCodeSDNode>(CCOp.getOperand(2))->get();
3461 bool DoXform = false;
3463 assert ((Opc == ISD::ADD || (Opc == ISD::SUB && Slct == N->getOperand(1))) &&
3466 if (LHS.getOpcode() == ISD::Constant &&
3467 cast<ConstantSDNode>(LHS)->isNullValue()) {
3469 } else if (CC != ISD::SETCC_INVALID &&
3470 RHS.getOpcode() == ISD::Constant &&
3471 cast<ConstantSDNode>(RHS)->isNullValue()) {
3472 std::swap(LHS, RHS);
3473 SDValue Op0 = Slct.getOperand(0);
3474 EVT OpVT = isSlctCC ? Op0.getValueType() :
3475 Op0.getOperand(0).getValueType();
3476 bool isInt = OpVT.isInteger();
3477 CC = ISD::getSetCCInverse(CC, isInt);
3479 if (!TLI.isCondCodeLegal(CC, OpVT))
3480 return SDValue(); // Inverse operator isn't legal.
3487 SDValue Result = DAG.getNode(Opc, RHS.getDebugLoc(), VT, OtherOp, RHS);
3489 return DAG.getSelectCC(N->getDebugLoc(), OtherOp, Result,
3490 Slct.getOperand(0), Slct.getOperand(1), CC);
3491 SDValue CCOp = Slct.getOperand(0);
3493 CCOp = DAG.getSetCC(Slct.getDebugLoc(), CCOp.getValueType(),
3494 CCOp.getOperand(0), CCOp.getOperand(1), CC);
3495 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
3496 CCOp, OtherOp, Result);
3501 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
3502 static SDValue PerformADDCombine(SDNode *N,
3503 TargetLowering::DAGCombinerInfo &DCI) {
3504 // added by evan in r37685 with no testcase.
3505 SDValue N0 = N->getOperand(0), N1 = N->getOperand(1);
3507 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
3508 if (N0.getOpcode() == ISD::SELECT && N0.getNode()->hasOneUse()) {
3509 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
3510 if (Result.getNode()) return Result;
3512 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
3513 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
3514 if (Result.getNode()) return Result;
3520 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
3521 static SDValue PerformSUBCombine(SDNode *N,
3522 TargetLowering::DAGCombinerInfo &DCI) {
3523 // added by evan in r37685 with no testcase.
3524 SDValue N0 = N->getOperand(0), N1 = N->getOperand(1);
3526 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
3527 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
3528 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
3529 if (Result.getNode()) return Result;
3535 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
3536 /// ARMISD::VMOVRRD.
3537 static SDValue PerformVMOVRRDCombine(SDNode *N,
3538 TargetLowering::DAGCombinerInfo &DCI) {
3539 // fmrrd(fmdrr x, y) -> x,y
3540 SDValue InDouble = N->getOperand(0);
3541 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
3542 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
3546 /// getVShiftImm - Check if this is a valid build_vector for the immediate
3547 /// operand of a vector shift operation, where all the elements of the
3548 /// build_vector must have the same constant integer value.
3549 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
3550 // Ignore bit_converts.
3551 while (Op.getOpcode() == ISD::BIT_CONVERT)
3552 Op = Op.getOperand(0);
3553 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
3554 APInt SplatBits, SplatUndef;
3555 unsigned SplatBitSize;
3557 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
3558 HasAnyUndefs, ElementBits) ||
3559 SplatBitSize > ElementBits)
3561 Cnt = SplatBits.getSExtValue();
3565 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
3566 /// operand of a vector shift left operation. That value must be in the range:
3567 /// 0 <= Value < ElementBits for a left shift; or
3568 /// 0 <= Value <= ElementBits for a long left shift.
3569 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
3570 assert(VT.isVector() && "vector shift count is not a vector type");
3571 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
3572 if (! getVShiftImm(Op, ElementBits, Cnt))
3574 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
3577 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
3578 /// operand of a vector shift right operation. For a shift opcode, the value
3579 /// is positive, but for an intrinsic the value count must be negative. The
3580 /// absolute value must be in the range:
3581 /// 1 <= |Value| <= ElementBits for a right shift; or
3582 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
3583 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
3585 assert(VT.isVector() && "vector shift count is not a vector type");
3586 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
3587 if (! getVShiftImm(Op, ElementBits, Cnt))
3591 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
3594 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
3595 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
3596 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
3599 // Don't do anything for most intrinsics.
3602 // Vector shifts: check for immediate versions and lower them.
3603 // Note: This is done during DAG combining instead of DAG legalizing because
3604 // the build_vectors for 64-bit vector element shift counts are generally
3605 // not legal, and it is hard to see their values after they get legalized to
3606 // loads from a constant pool.
3607 case Intrinsic::arm_neon_vshifts:
3608 case Intrinsic::arm_neon_vshiftu:
3609 case Intrinsic::arm_neon_vshiftls:
3610 case Intrinsic::arm_neon_vshiftlu:
3611 case Intrinsic::arm_neon_vshiftn:
3612 case Intrinsic::arm_neon_vrshifts:
3613 case Intrinsic::arm_neon_vrshiftu:
3614 case Intrinsic::arm_neon_vrshiftn:
3615 case Intrinsic::arm_neon_vqshifts:
3616 case Intrinsic::arm_neon_vqshiftu:
3617 case Intrinsic::arm_neon_vqshiftsu:
3618 case Intrinsic::arm_neon_vqshiftns:
3619 case Intrinsic::arm_neon_vqshiftnu:
3620 case Intrinsic::arm_neon_vqshiftnsu:
3621 case Intrinsic::arm_neon_vqrshiftns:
3622 case Intrinsic::arm_neon_vqrshiftnu:
3623 case Intrinsic::arm_neon_vqrshiftnsu: {
3624 EVT VT = N->getOperand(1).getValueType();
3626 unsigned VShiftOpc = 0;
3629 case Intrinsic::arm_neon_vshifts:
3630 case Intrinsic::arm_neon_vshiftu:
3631 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
3632 VShiftOpc = ARMISD::VSHL;
3635 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
3636 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
3637 ARMISD::VSHRs : ARMISD::VSHRu);
3642 case Intrinsic::arm_neon_vshiftls:
3643 case Intrinsic::arm_neon_vshiftlu:
3644 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
3646 llvm_unreachable("invalid shift count for vshll intrinsic");
3648 case Intrinsic::arm_neon_vrshifts:
3649 case Intrinsic::arm_neon_vrshiftu:
3650 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
3654 case Intrinsic::arm_neon_vqshifts:
3655 case Intrinsic::arm_neon_vqshiftu:
3656 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
3660 case Intrinsic::arm_neon_vqshiftsu:
3661 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
3663 llvm_unreachable("invalid shift count for vqshlu intrinsic");
3665 case Intrinsic::arm_neon_vshiftn:
3666 case Intrinsic::arm_neon_vrshiftn:
3667 case Intrinsic::arm_neon_vqshiftns:
3668 case Intrinsic::arm_neon_vqshiftnu:
3669 case Intrinsic::arm_neon_vqshiftnsu:
3670 case Intrinsic::arm_neon_vqrshiftns:
3671 case Intrinsic::arm_neon_vqrshiftnu:
3672 case Intrinsic::arm_neon_vqrshiftnsu:
3673 // Narrowing shifts require an immediate right shift.
3674 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
3676 llvm_unreachable("invalid shift count for narrowing vector shift intrinsic");
3679 llvm_unreachable("unhandled vector shift");
3683 case Intrinsic::arm_neon_vshifts:
3684 case Intrinsic::arm_neon_vshiftu:
3685 // Opcode already set above.
3687 case Intrinsic::arm_neon_vshiftls:
3688 case Intrinsic::arm_neon_vshiftlu:
3689 if (Cnt == VT.getVectorElementType().getSizeInBits())
3690 VShiftOpc = ARMISD::VSHLLi;
3692 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
3693 ARMISD::VSHLLs : ARMISD::VSHLLu);
3695 case Intrinsic::arm_neon_vshiftn:
3696 VShiftOpc = ARMISD::VSHRN; break;
3697 case Intrinsic::arm_neon_vrshifts:
3698 VShiftOpc = ARMISD::VRSHRs; break;
3699 case Intrinsic::arm_neon_vrshiftu:
3700 VShiftOpc = ARMISD::VRSHRu; break;
3701 case Intrinsic::arm_neon_vrshiftn:
3702 VShiftOpc = ARMISD::VRSHRN; break;
3703 case Intrinsic::arm_neon_vqshifts:
3704 VShiftOpc = ARMISD::VQSHLs; break;
3705 case Intrinsic::arm_neon_vqshiftu:
3706 VShiftOpc = ARMISD::VQSHLu; break;
3707 case Intrinsic::arm_neon_vqshiftsu:
3708 VShiftOpc = ARMISD::VQSHLsu; break;
3709 case Intrinsic::arm_neon_vqshiftns:
3710 VShiftOpc = ARMISD::VQSHRNs; break;
3711 case Intrinsic::arm_neon_vqshiftnu:
3712 VShiftOpc = ARMISD::VQSHRNu; break;
3713 case Intrinsic::arm_neon_vqshiftnsu:
3714 VShiftOpc = ARMISD::VQSHRNsu; break;
3715 case Intrinsic::arm_neon_vqrshiftns:
3716 VShiftOpc = ARMISD::VQRSHRNs; break;
3717 case Intrinsic::arm_neon_vqrshiftnu:
3718 VShiftOpc = ARMISD::VQRSHRNu; break;
3719 case Intrinsic::arm_neon_vqrshiftnsu:
3720 VShiftOpc = ARMISD::VQRSHRNsu; break;
3723 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
3724 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
3727 case Intrinsic::arm_neon_vshiftins: {
3728 EVT VT = N->getOperand(1).getValueType();
3730 unsigned VShiftOpc = 0;
3732 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
3733 VShiftOpc = ARMISD::VSLI;
3734 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
3735 VShiftOpc = ARMISD::VSRI;
3737 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
3740 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
3741 N->getOperand(1), N->getOperand(2),
3742 DAG.getConstant(Cnt, MVT::i32));
3745 case Intrinsic::arm_neon_vqrshifts:
3746 case Intrinsic::arm_neon_vqrshiftu:
3747 // No immediate versions of these to check for.
3754 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
3755 /// lowers them. As with the vector shift intrinsics, this is done during DAG
3756 /// combining instead of DAG legalizing because the build_vectors for 64-bit
3757 /// vector element shift counts are generally not legal, and it is hard to see
3758 /// their values after they get legalized to loads from a constant pool.
3759 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
3760 const ARMSubtarget *ST) {
3761 EVT VT = N->getValueType(0);
3763 // Nothing to be done for scalar shifts.
3764 if (! VT.isVector())
3767 assert(ST->hasNEON() && "unexpected vector shift");
3770 switch (N->getOpcode()) {
3771 default: llvm_unreachable("unexpected shift opcode");
3774 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
3775 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
3776 DAG.getConstant(Cnt, MVT::i32));
3781 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
3782 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
3783 ARMISD::VSHRs : ARMISD::VSHRu);
3784 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
3785 DAG.getConstant(Cnt, MVT::i32));
3791 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
3792 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
3793 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
3794 const ARMSubtarget *ST) {
3795 SDValue N0 = N->getOperand(0);
3797 // Check for sign- and zero-extensions of vector extract operations of 8-
3798 // and 16-bit vector elements. NEON supports these directly. They are
3799 // handled during DAG combining because type legalization will promote them
3800 // to 32-bit types and it is messy to recognize the operations after that.
3801 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
3802 SDValue Vec = N0.getOperand(0);
3803 SDValue Lane = N0.getOperand(1);
3804 EVT VT = N->getValueType(0);
3805 EVT EltVT = N0.getValueType();
3806 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3808 if (VT == MVT::i32 &&
3809 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
3810 TLI.isTypeLegal(Vec.getValueType())) {
3813 switch (N->getOpcode()) {
3814 default: llvm_unreachable("unexpected opcode");
3815 case ISD::SIGN_EXTEND:
3816 Opc = ARMISD::VGETLANEs;
3818 case ISD::ZERO_EXTEND:
3819 case ISD::ANY_EXTEND:
3820 Opc = ARMISD::VGETLANEu;
3823 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
3830 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
3831 DAGCombinerInfo &DCI) const {
3832 switch (N->getOpcode()) {
3834 case ISD::ADD: return PerformADDCombine(N, DCI);
3835 case ISD::SUB: return PerformSUBCombine(N, DCI);
3836 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
3837 case ISD::INTRINSIC_WO_CHAIN:
3838 return PerformIntrinsicCombine(N, DCI.DAG);
3842 return PerformShiftCombine(N, DCI.DAG, Subtarget);
3843 case ISD::SIGN_EXTEND:
3844 case ISD::ZERO_EXTEND:
3845 case ISD::ANY_EXTEND:
3846 return PerformExtendCombine(N, DCI.DAG, Subtarget);
3851 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
3852 if (!Subtarget->hasV6Ops())
3853 // Pre-v6 does not support unaligned mem access.
3855 else if (!Subtarget->hasV6Ops()) {
3856 // v6 may or may not support unaligned mem access.
3857 if (!Subtarget->isTargetDarwin())
3861 switch (VT.getSimpleVT().SimpleTy) {
3868 // FIXME: VLD1 etc with standard alignment is legal.
3872 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
3877 switch (VT.getSimpleVT().SimpleTy) {
3878 default: return false;
3893 if ((V & (Scale - 1)) != 0)
3896 return V == (V & ((1LL << 5) - 1));
3899 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
3900 const ARMSubtarget *Subtarget) {
3907 switch (VT.getSimpleVT().SimpleTy) {
3908 default: return false;
3913 // + imm12 or - imm8
3915 return V == (V & ((1LL << 8) - 1));
3916 return V == (V & ((1LL << 12) - 1));
3919 // Same as ARM mode. FIXME: NEON?
3920 if (!Subtarget->hasVFP2())
3925 return V == (V & ((1LL << 8) - 1));
3929 /// isLegalAddressImmediate - Return true if the integer value can be used
3930 /// as the offset of the target addressing mode for load / store of the
3932 static bool isLegalAddressImmediate(int64_t V, EVT VT,
3933 const ARMSubtarget *Subtarget) {
3940 if (Subtarget->isThumb1Only())
3941 return isLegalT1AddressImmediate(V, VT);
3942 else if (Subtarget->isThumb2())
3943 return isLegalT2AddressImmediate(V, VT, Subtarget);
3948 switch (VT.getSimpleVT().SimpleTy) {
3949 default: return false;
3954 return V == (V & ((1LL << 12) - 1));
3957 return V == (V & ((1LL << 8) - 1));
3960 if (!Subtarget->hasVFP2()) // FIXME: NEON?
3965 return V == (V & ((1LL << 8) - 1));
3969 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
3971 int Scale = AM.Scale;
3975 switch (VT.getSimpleVT().SimpleTy) {
3976 default: return false;
3985 return Scale == 2 || Scale == 4 || Scale == 8;
3988 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
3992 // Note, we allow "void" uses (basically, uses that aren't loads or
3993 // stores), because arm allows folding a scale into many arithmetic
3994 // operations. This should be made more precise and revisited later.
3996 // Allow r << imm, but the imm has to be a multiple of two.
3997 if (Scale & 1) return false;
3998 return isPowerOf2_32(Scale);
4002 /// isLegalAddressingMode - Return true if the addressing mode represented
4003 /// by AM is legal for this target, for a load/store of the specified type.
4004 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
4005 const Type *Ty) const {
4006 EVT VT = getValueType(Ty, true);
4007 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
4010 // Can never fold addr of global into load/store.
4015 case 0: // no scale reg, must be "r+i" or "r", or "i".
4018 if (Subtarget->isThumb1Only())
4022 // ARM doesn't support any R+R*scale+imm addr modes.
4029 if (Subtarget->isThumb2())
4030 return isLegalT2ScaledAddressingMode(AM, VT);
4032 int Scale = AM.Scale;
4033 switch (VT.getSimpleVT().SimpleTy) {
4034 default: return false;
4038 if (Scale < 0) Scale = -Scale;
4042 return isPowerOf2_32(Scale & ~1);
4046 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
4051 // Note, we allow "void" uses (basically, uses that aren't loads or
4052 // stores), because arm allows folding a scale into many arithmetic
4053 // operations. This should be made more precise and revisited later.
4055 // Allow r << imm, but the imm has to be a multiple of two.
4056 if (Scale & 1) return false;
4057 return isPowerOf2_32(Scale);
4064 /// isLegalICmpImmediate - Return true if the specified immediate is legal
4065 /// icmp immediate, that is the target has icmp instructions which can compare
4066 /// a register against the immediate without having to materialize the
4067 /// immediate into a register.
4068 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
4069 if (!Subtarget->isThumb())
4070 return ARM_AM::getSOImmVal(Imm) != -1;
4071 if (Subtarget->isThumb2())
4072 return ARM_AM::getT2SOImmVal(Imm) != -1;
4073 return Imm >= 0 && Imm <= 255;
4076 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
4077 bool isSEXTLoad, SDValue &Base,
4078 SDValue &Offset, bool &isInc,
4079 SelectionDAG &DAG) {
4080 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
4083 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
4085 Base = Ptr->getOperand(0);
4086 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
4087 int RHSC = (int)RHS->getZExtValue();
4088 if (RHSC < 0 && RHSC > -256) {
4089 assert(Ptr->getOpcode() == ISD::ADD);
4091 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
4095 isInc = (Ptr->getOpcode() == ISD::ADD);
4096 Offset = Ptr->getOperand(1);
4098 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
4100 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
4101 int RHSC = (int)RHS->getZExtValue();
4102 if (RHSC < 0 && RHSC > -0x1000) {
4103 assert(Ptr->getOpcode() == ISD::ADD);
4105 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
4106 Base = Ptr->getOperand(0);
4111 if (Ptr->getOpcode() == ISD::ADD) {
4113 ARM_AM::ShiftOpc ShOpcVal= ARM_AM::getShiftOpcForNode(Ptr->getOperand(0));
4114 if (ShOpcVal != ARM_AM::no_shift) {
4115 Base = Ptr->getOperand(1);
4116 Offset = Ptr->getOperand(0);
4118 Base = Ptr->getOperand(0);
4119 Offset = Ptr->getOperand(1);
4124 isInc = (Ptr->getOpcode() == ISD::ADD);
4125 Base = Ptr->getOperand(0);
4126 Offset = Ptr->getOperand(1);
4130 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
4134 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
4135 bool isSEXTLoad, SDValue &Base,
4136 SDValue &Offset, bool &isInc,
4137 SelectionDAG &DAG) {
4138 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
4141 Base = Ptr->getOperand(0);
4142 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
4143 int RHSC = (int)RHS->getZExtValue();
4144 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
4145 assert(Ptr->getOpcode() == ISD::ADD);
4147 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
4149 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
4150 isInc = Ptr->getOpcode() == ISD::ADD;
4151 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
4159 /// getPreIndexedAddressParts - returns true by value, base pointer and
4160 /// offset pointer and addressing mode by reference if the node's address
4161 /// can be legally represented as pre-indexed load / store address.
4163 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
4165 ISD::MemIndexedMode &AM,
4166 SelectionDAG &DAG) const {
4167 if (Subtarget->isThumb1Only())
4172 bool isSEXTLoad = false;
4173 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
4174 Ptr = LD->getBasePtr();
4175 VT = LD->getMemoryVT();
4176 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
4177 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
4178 Ptr = ST->getBasePtr();
4179 VT = ST->getMemoryVT();
4184 bool isLegal = false;
4185 if (Subtarget->isThumb2())
4186 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
4187 Offset, isInc, DAG);
4189 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
4190 Offset, isInc, DAG);
4194 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
4198 /// getPostIndexedAddressParts - returns true by value, base pointer and
4199 /// offset pointer and addressing mode by reference if this node can be
4200 /// combined with a load / store to form a post-indexed load / store.
4201 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
4204 ISD::MemIndexedMode &AM,
4205 SelectionDAG &DAG) const {
4206 if (Subtarget->isThumb1Only())
4211 bool isSEXTLoad = false;
4212 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
4213 VT = LD->getMemoryVT();
4214 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
4215 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
4216 VT = ST->getMemoryVT();
4221 bool isLegal = false;
4222 if (Subtarget->isThumb2())
4223 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
4226 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
4231 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
4235 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
4239 const SelectionDAG &DAG,
4240 unsigned Depth) const {
4241 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
4242 switch (Op.getOpcode()) {
4244 case ARMISD::CMOV: {
4245 // Bits are known zero/one if known on the LHS and RHS.
4246 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
4247 if (KnownZero == 0 && KnownOne == 0) return;
4249 APInt KnownZeroRHS, KnownOneRHS;
4250 DAG.ComputeMaskedBits(Op.getOperand(1), Mask,
4251 KnownZeroRHS, KnownOneRHS, Depth+1);
4252 KnownZero &= KnownZeroRHS;
4253 KnownOne &= KnownOneRHS;
4259 //===----------------------------------------------------------------------===//
4260 // ARM Inline Assembly Support
4261 //===----------------------------------------------------------------------===//
4263 /// getConstraintType - Given a constraint letter, return the type of
4264 /// constraint it is for this target.
4265 ARMTargetLowering::ConstraintType
4266 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
4267 if (Constraint.size() == 1) {
4268 switch (Constraint[0]) {
4270 case 'l': return C_RegisterClass;
4271 case 'w': return C_RegisterClass;
4274 return TargetLowering::getConstraintType(Constraint);
4277 std::pair<unsigned, const TargetRegisterClass*>
4278 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
4280 if (Constraint.size() == 1) {
4281 // GCC ARM Constraint Letters
4282 switch (Constraint[0]) {
4284 if (Subtarget->isThumb())
4285 return std::make_pair(0U, ARM::tGPRRegisterClass);
4287 return std::make_pair(0U, ARM::GPRRegisterClass);
4289 return std::make_pair(0U, ARM::GPRRegisterClass);
4292 return std::make_pair(0U, ARM::SPRRegisterClass);
4293 if (VT.getSizeInBits() == 64)
4294 return std::make_pair(0U, ARM::DPRRegisterClass);
4295 if (VT.getSizeInBits() == 128)
4296 return std::make_pair(0U, ARM::QPRRegisterClass);
4300 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
4303 std::vector<unsigned> ARMTargetLowering::
4304 getRegClassForInlineAsmConstraint(const std::string &Constraint,
4306 if (Constraint.size() != 1)
4307 return std::vector<unsigned>();
4309 switch (Constraint[0]) { // GCC ARM Constraint Letters
4312 return make_vector<unsigned>(ARM::R0, ARM::R1, ARM::R2, ARM::R3,
4313 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
4316 return make_vector<unsigned>(ARM::R0, ARM::R1, ARM::R2, ARM::R3,
4317 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
4318 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
4319 ARM::R12, ARM::LR, 0);
4322 return make_vector<unsigned>(ARM::S0, ARM::S1, ARM::S2, ARM::S3,
4323 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
4324 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
4325 ARM::S12,ARM::S13,ARM::S14,ARM::S15,
4326 ARM::S16,ARM::S17,ARM::S18,ARM::S19,
4327 ARM::S20,ARM::S21,ARM::S22,ARM::S23,
4328 ARM::S24,ARM::S25,ARM::S26,ARM::S27,
4329 ARM::S28,ARM::S29,ARM::S30,ARM::S31, 0);
4330 if (VT.getSizeInBits() == 64)
4331 return make_vector<unsigned>(ARM::D0, ARM::D1, ARM::D2, ARM::D3,
4332 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
4333 ARM::D8, ARM::D9, ARM::D10,ARM::D11,
4334 ARM::D12,ARM::D13,ARM::D14,ARM::D15, 0);
4335 if (VT.getSizeInBits() == 128)
4336 return make_vector<unsigned>(ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
4337 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7, 0);
4341 return std::vector<unsigned>();
4344 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
4345 /// vector. If it is invalid, don't add anything to Ops.
4346 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
4349 std::vector<SDValue>&Ops,
4350 SelectionDAG &DAG) const {
4351 SDValue Result(0, 0);
4353 switch (Constraint) {
4355 case 'I': case 'J': case 'K': case 'L':
4356 case 'M': case 'N': case 'O':
4357 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
4361 int64_t CVal64 = C->getSExtValue();
4362 int CVal = (int) CVal64;
4363 // None of these constraints allow values larger than 32 bits. Check
4364 // that the value fits in an int.
4368 switch (Constraint) {
4370 if (Subtarget->isThumb1Only()) {
4371 // This must be a constant between 0 and 255, for ADD
4373 if (CVal >= 0 && CVal <= 255)
4375 } else if (Subtarget->isThumb2()) {
4376 // A constant that can be used as an immediate value in a
4377 // data-processing instruction.
4378 if (ARM_AM::getT2SOImmVal(CVal) != -1)
4381 // A constant that can be used as an immediate value in a
4382 // data-processing instruction.
4383 if (ARM_AM::getSOImmVal(CVal) != -1)
4389 if (Subtarget->isThumb()) { // FIXME thumb2
4390 // This must be a constant between -255 and -1, for negated ADD
4391 // immediates. This can be used in GCC with an "n" modifier that
4392 // prints the negated value, for use with SUB instructions. It is
4393 // not useful otherwise but is implemented for compatibility.
4394 if (CVal >= -255 && CVal <= -1)
4397 // This must be a constant between -4095 and 4095. It is not clear
4398 // what this constraint is intended for. Implemented for
4399 // compatibility with GCC.
4400 if (CVal >= -4095 && CVal <= 4095)
4406 if (Subtarget->isThumb1Only()) {
4407 // A 32-bit value where only one byte has a nonzero value. Exclude
4408 // zero to match GCC. This constraint is used by GCC internally for
4409 // constants that can be loaded with a move/shift combination.
4410 // It is not useful otherwise but is implemented for compatibility.
4411 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
4413 } else if (Subtarget->isThumb2()) {
4414 // A constant whose bitwise inverse can be used as an immediate
4415 // value in a data-processing instruction. This can be used in GCC
4416 // with a "B" modifier that prints the inverted value, for use with
4417 // BIC and MVN instructions. It is not useful otherwise but is
4418 // implemented for compatibility.
4419 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
4422 // A constant whose bitwise inverse can be used as an immediate
4423 // value in a data-processing instruction. This can be used in GCC
4424 // with a "B" modifier that prints the inverted value, for use with
4425 // BIC and MVN instructions. It is not useful otherwise but is
4426 // implemented for compatibility.
4427 if (ARM_AM::getSOImmVal(~CVal) != -1)
4433 if (Subtarget->isThumb1Only()) {
4434 // This must be a constant between -7 and 7,
4435 // for 3-operand ADD/SUB immediate instructions.
4436 if (CVal >= -7 && CVal < 7)
4438 } else if (Subtarget->isThumb2()) {
4439 // A constant whose negation can be used as an immediate value in a
4440 // data-processing instruction. This can be used in GCC with an "n"
4441 // modifier that prints the negated value, for use with SUB
4442 // instructions. It is not useful otherwise but is implemented for
4444 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
4447 // A constant whose negation can be used as an immediate value in a
4448 // data-processing instruction. This can be used in GCC with an "n"
4449 // modifier that prints the negated value, for use with SUB
4450 // instructions. It is not useful otherwise but is implemented for
4452 if (ARM_AM::getSOImmVal(-CVal) != -1)
4458 if (Subtarget->isThumb()) { // FIXME thumb2
4459 // This must be a multiple of 4 between 0 and 1020, for
4460 // ADD sp + immediate.
4461 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
4464 // A power of two or a constant between 0 and 32. This is used in
4465 // GCC for the shift amount on shifted register operands, but it is
4466 // useful in general for any shift amounts.
4467 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
4473 if (Subtarget->isThumb()) { // FIXME thumb2
4474 // This must be a constant between 0 and 31, for shift amounts.
4475 if (CVal >= 0 && CVal <= 31)
4481 if (Subtarget->isThumb()) { // FIXME thumb2
4482 // This must be a multiple of 4 between -508 and 508, for
4483 // ADD/SUB sp = sp + immediate.
4484 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
4489 Result = DAG.getTargetConstant(CVal, Op.getValueType());
4493 if (Result.getNode()) {
4494 Ops.push_back(Result);
4497 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, hasMemory,
4502 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
4503 // The ARM target isn't yet aware of offsets.
4507 int ARM::getVFPf32Imm(const APFloat &FPImm) {
4508 APInt Imm = FPImm.bitcastToAPInt();
4509 uint32_t Sign = Imm.lshr(31).getZExtValue() & 1;
4510 int32_t Exp = (Imm.lshr(23).getSExtValue() & 0xff) - 127; // -126 to 127
4511 int64_t Mantissa = Imm.getZExtValue() & 0x7fffff; // 23 bits
4513 // We can handle 4 bits of mantissa.
4514 // mantissa = (16+UInt(e:f:g:h))/16.
4515 if (Mantissa & 0x7ffff)
4518 if ((Mantissa & 0xf) != Mantissa)
4521 // We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
4522 if (Exp < -3 || Exp > 4)
4524 Exp = ((Exp+3) & 0x7) ^ 4;
4526 return ((int)Sign << 7) | (Exp << 4) | Mantissa;
4529 int ARM::getVFPf64Imm(const APFloat &FPImm) {
4530 APInt Imm = FPImm.bitcastToAPInt();
4531 uint64_t Sign = Imm.lshr(63).getZExtValue() & 1;
4532 int64_t Exp = (Imm.lshr(52).getSExtValue() & 0x7ff) - 1023; // -1022 to 1023
4533 uint64_t Mantissa = Imm.getZExtValue() & 0xfffffffffffffLL;
4535 // We can handle 4 bits of mantissa.
4536 // mantissa = (16+UInt(e:f:g:h))/16.
4537 if (Mantissa & 0xffffffffffffLL)
4540 if ((Mantissa & 0xf) != Mantissa)
4543 // We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
4544 if (Exp < -3 || Exp > 4)
4546 Exp = ((Exp+3) & 0x7) ^ 4;
4548 return ((int)Sign << 7) | (Exp << 4) | Mantissa;
4551 /// isFPImmLegal - Returns true if the target can instruction select the
4552 /// specified FP immediate natively. If false, the legalizer will
4553 /// materialize the FP immediate as a load from a constant pool.
4554 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
4555 if (!Subtarget->hasVFP3())
4558 return ARM::getVFPf32Imm(Imm) != -1;
4560 return ARM::getVFPf64Imm(Imm) != -1;