1 //===-- MipsISelLowering.cpp - Mips 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 Mips uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "mips-lower"
15 #include "MipsISelLowering.h"
16 #include "InstPrinter/MipsInstPrinter.h"
17 #include "MCTargetDesc/MipsBaseInfo.h"
18 #include "MipsMachineFunction.h"
19 #include "MipsSubtarget.h"
20 #include "MipsTargetMachine.h"
21 #include "MipsTargetObjectFile.h"
22 #include "llvm/ADT/Statistic.h"
23 #include "llvm/CodeGen/CallingConvLower.h"
24 #include "llvm/CodeGen/MachineFrameInfo.h"
25 #include "llvm/CodeGen/MachineFunction.h"
26 #include "llvm/CodeGen/MachineInstrBuilder.h"
27 #include "llvm/CodeGen/MachineRegisterInfo.h"
28 #include "llvm/CodeGen/SelectionDAGISel.h"
29 #include "llvm/CodeGen/ValueTypes.h"
30 #include "llvm/IR/CallingConv.h"
31 #include "llvm/IR/DerivedTypes.h"
32 #include "llvm/IR/GlobalVariable.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/Debug.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/raw_ostream.h"
41 STATISTIC(NumTailCalls, "Number of tail calls");
44 LargeGOT("mxgot", cl::Hidden,
45 cl::desc("MIPS: Enable GOT larger than 64k."), cl::init(false));
48 NoZeroDivCheck("mno-check-zero-division", cl::Hidden,
49 cl::desc("MIPS: Don't trap on integer division by zero."),
52 static const uint16_t O32IntRegs[4] = {
53 Mips::A0, Mips::A1, Mips::A2, Mips::A3
56 static const uint16_t Mips64IntRegs[8] = {
57 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
58 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64
61 static const uint16_t Mips64DPRegs[8] = {
62 Mips::D12_64, Mips::D13_64, Mips::D14_64, Mips::D15_64,
63 Mips::D16_64, Mips::D17_64, Mips::D18_64, Mips::D19_64
66 // If I is a shifted mask, set the size (Size) and the first bit of the
67 // mask (Pos), and return true.
68 // For example, if I is 0x003ff800, (Pos, Size) = (11, 11).
69 static bool isShiftedMask(uint64_t I, uint64_t &Pos, uint64_t &Size) {
70 if (!isShiftedMask_64(I))
73 Size = CountPopulation_64(I);
74 Pos = countTrailingZeros(I);
78 SDValue MipsTargetLowering::getGlobalReg(SelectionDAG &DAG, EVT Ty) const {
79 MipsFunctionInfo *FI = DAG.getMachineFunction().getInfo<MipsFunctionInfo>();
80 return DAG.getRegister(FI->getGlobalBaseReg(), Ty);
83 SDValue MipsTargetLowering::getTargetNode(GlobalAddressSDNode *N, EVT Ty,
85 unsigned Flag) const {
86 return DAG.getTargetGlobalAddress(N->getGlobal(), SDLoc(N), Ty, 0, Flag);
89 SDValue MipsTargetLowering::getTargetNode(ExternalSymbolSDNode *N, EVT Ty,
91 unsigned Flag) const {
92 return DAG.getTargetExternalSymbol(N->getSymbol(), Ty, Flag);
95 SDValue MipsTargetLowering::getTargetNode(BlockAddressSDNode *N, EVT Ty,
97 unsigned Flag) const {
98 return DAG.getTargetBlockAddress(N->getBlockAddress(), Ty, 0, Flag);
101 SDValue MipsTargetLowering::getTargetNode(JumpTableSDNode *N, EVT Ty,
103 unsigned Flag) const {
104 return DAG.getTargetJumpTable(N->getIndex(), Ty, Flag);
107 SDValue MipsTargetLowering::getTargetNode(ConstantPoolSDNode *N, EVT Ty,
109 unsigned Flag) const {
110 return DAG.getTargetConstantPool(N->getConstVal(), Ty, N->getAlignment(),
111 N->getOffset(), Flag);
114 const char *MipsTargetLowering::getTargetNodeName(unsigned Opcode) const {
116 case MipsISD::JmpLink: return "MipsISD::JmpLink";
117 case MipsISD::TailCall: return "MipsISD::TailCall";
118 case MipsISD::Hi: return "MipsISD::Hi";
119 case MipsISD::Lo: return "MipsISD::Lo";
120 case MipsISD::GPRel: return "MipsISD::GPRel";
121 case MipsISD::ThreadPointer: return "MipsISD::ThreadPointer";
122 case MipsISD::Ret: return "MipsISD::Ret";
123 case MipsISD::EH_RETURN: return "MipsISD::EH_RETURN";
124 case MipsISD::FPBrcond: return "MipsISD::FPBrcond";
125 case MipsISD::FPCmp: return "MipsISD::FPCmp";
126 case MipsISD::CMovFP_T: return "MipsISD::CMovFP_T";
127 case MipsISD::CMovFP_F: return "MipsISD::CMovFP_F";
128 case MipsISD::TruncIntFP: return "MipsISD::TruncIntFP";
129 case MipsISD::ExtractLOHI: return "MipsISD::ExtractLOHI";
130 case MipsISD::InsertLOHI: return "MipsISD::InsertLOHI";
131 case MipsISD::Mult: return "MipsISD::Mult";
132 case MipsISD::Multu: return "MipsISD::Multu";
133 case MipsISD::MAdd: return "MipsISD::MAdd";
134 case MipsISD::MAddu: return "MipsISD::MAddu";
135 case MipsISD::MSub: return "MipsISD::MSub";
136 case MipsISD::MSubu: return "MipsISD::MSubu";
137 case MipsISD::DivRem: return "MipsISD::DivRem";
138 case MipsISD::DivRemU: return "MipsISD::DivRemU";
139 case MipsISD::DivRem16: return "MipsISD::DivRem16";
140 case MipsISD::DivRemU16: return "MipsISD::DivRemU16";
141 case MipsISD::BuildPairF64: return "MipsISD::BuildPairF64";
142 case MipsISD::ExtractElementF64: return "MipsISD::ExtractElementF64";
143 case MipsISD::Wrapper: return "MipsISD::Wrapper";
144 case MipsISD::Sync: return "MipsISD::Sync";
145 case MipsISD::Ext: return "MipsISD::Ext";
146 case MipsISD::Ins: return "MipsISD::Ins";
147 case MipsISD::LWL: return "MipsISD::LWL";
148 case MipsISD::LWR: return "MipsISD::LWR";
149 case MipsISD::SWL: return "MipsISD::SWL";
150 case MipsISD::SWR: return "MipsISD::SWR";
151 case MipsISD::LDL: return "MipsISD::LDL";
152 case MipsISD::LDR: return "MipsISD::LDR";
153 case MipsISD::SDL: return "MipsISD::SDL";
154 case MipsISD::SDR: return "MipsISD::SDR";
155 case MipsISD::EXTP: return "MipsISD::EXTP";
156 case MipsISD::EXTPDP: return "MipsISD::EXTPDP";
157 case MipsISD::EXTR_S_H: return "MipsISD::EXTR_S_H";
158 case MipsISD::EXTR_W: return "MipsISD::EXTR_W";
159 case MipsISD::EXTR_R_W: return "MipsISD::EXTR_R_W";
160 case MipsISD::EXTR_RS_W: return "MipsISD::EXTR_RS_W";
161 case MipsISD::SHILO: return "MipsISD::SHILO";
162 case MipsISD::MTHLIP: return "MipsISD::MTHLIP";
163 case MipsISD::MULT: return "MipsISD::MULT";
164 case MipsISD::MULTU: return "MipsISD::MULTU";
165 case MipsISD::MADD_DSP: return "MipsISD::MADD_DSP";
166 case MipsISD::MADDU_DSP: return "MipsISD::MADDU_DSP";
167 case MipsISD::MSUB_DSP: return "MipsISD::MSUB_DSP";
168 case MipsISD::MSUBU_DSP: return "MipsISD::MSUBU_DSP";
169 case MipsISD::SHLL_DSP: return "MipsISD::SHLL_DSP";
170 case MipsISD::SHRA_DSP: return "MipsISD::SHRA_DSP";
171 case MipsISD::SHRL_DSP: return "MipsISD::SHRL_DSP";
172 case MipsISD::SETCC_DSP: return "MipsISD::SETCC_DSP";
173 case MipsISD::SELECT_CC_DSP: return "MipsISD::SELECT_CC_DSP";
174 case MipsISD::VALL_ZERO: return "MipsISD::VALL_ZERO";
175 case MipsISD::VANY_ZERO: return "MipsISD::VANY_ZERO";
176 case MipsISD::VALL_NONZERO: return "MipsISD::VALL_NONZERO";
177 case MipsISD::VANY_NONZERO: return "MipsISD::VANY_NONZERO";
178 case MipsISD::VCEQ: return "MipsISD::VCEQ";
179 case MipsISD::VCLE_S: return "MipsISD::VCLE_S";
180 case MipsISD::VCLE_U: return "MipsISD::VCLE_U";
181 case MipsISD::VCLT_S: return "MipsISD::VCLT_S";
182 case MipsISD::VCLT_U: return "MipsISD::VCLT_U";
183 case MipsISD::VSMAX: return "MipsISD::VSMAX";
184 case MipsISD::VSMIN: return "MipsISD::VSMIN";
185 case MipsISD::VUMAX: return "MipsISD::VUMAX";
186 case MipsISD::VUMIN: return "MipsISD::VUMIN";
187 case MipsISD::VEXTRACT_SEXT_ELT: return "MipsISD::VEXTRACT_SEXT_ELT";
188 case MipsISD::VEXTRACT_ZEXT_ELT: return "MipsISD::VEXTRACT_ZEXT_ELT";
189 case MipsISD::VNOR: return "MipsISD::VNOR";
190 case MipsISD::VSHF: return "MipsISD::VSHF";
191 case MipsISD::SHF: return "MipsISD::SHF";
192 case MipsISD::ILVEV: return "MipsISD::ILVEV";
193 case MipsISD::ILVOD: return "MipsISD::ILVOD";
194 case MipsISD::ILVL: return "MipsISD::ILVL";
195 case MipsISD::ILVR: return "MipsISD::ILVR";
196 case MipsISD::PCKEV: return "MipsISD::PCKEV";
197 case MipsISD::PCKOD: return "MipsISD::PCKOD";
198 default: return NULL;
203 MipsTargetLowering(MipsTargetMachine &TM)
204 : TargetLowering(TM, new MipsTargetObjectFile()),
205 Subtarget(&TM.getSubtarget<MipsSubtarget>()),
206 HasMips64(Subtarget->hasMips64()), IsN64(Subtarget->isABI_N64()),
207 IsO32(Subtarget->isABI_O32()) {
208 // Mips does not have i1 type, so use i32 for
209 // setcc operations results (slt, sgt, ...).
210 setBooleanContents(ZeroOrOneBooleanContent);
211 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
213 // Load extented operations for i1 types must be promoted
214 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
215 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
216 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
218 // MIPS doesn't have extending float->double load/store
219 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
220 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
222 // Used by legalize types to correctly generate the setcc result.
223 // Without this, every float setcc comes with a AND/OR with the result,
224 // we don't want this, since the fpcmp result goes to a flag register,
225 // which is used implicitly by brcond and select operations.
226 AddPromotedToType(ISD::SETCC, MVT::i1, MVT::i32);
228 // Mips Custom Operations
229 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
230 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
231 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
232 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
233 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
234 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
235 setOperationAction(ISD::SELECT, MVT::f32, Custom);
236 setOperationAction(ISD::SELECT, MVT::f64, Custom);
237 setOperationAction(ISD::SELECT, MVT::i32, Custom);
238 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
239 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
240 setOperationAction(ISD::SETCC, MVT::f32, Custom);
241 setOperationAction(ISD::SETCC, MVT::f64, Custom);
242 setOperationAction(ISD::BRCOND, MVT::Other, Custom);
243 setOperationAction(ISD::VASTART, MVT::Other, Custom);
244 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
245 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
246 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
248 if (!TM.Options.NoNaNsFPMath) {
249 setOperationAction(ISD::FABS, MVT::f32, Custom);
250 setOperationAction(ISD::FABS, MVT::f64, Custom);
254 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
255 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
256 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
257 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
258 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
259 setOperationAction(ISD::SELECT, MVT::i64, Custom);
260 setOperationAction(ISD::LOAD, MVT::i64, Custom);
261 setOperationAction(ISD::STORE, MVT::i64, Custom);
262 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
266 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
267 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
268 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
271 setOperationAction(ISD::ADD, MVT::i32, Custom);
273 setOperationAction(ISD::ADD, MVT::i64, Custom);
275 setOperationAction(ISD::SDIV, MVT::i32, Expand);
276 setOperationAction(ISD::SREM, MVT::i32, Expand);
277 setOperationAction(ISD::UDIV, MVT::i32, Expand);
278 setOperationAction(ISD::UREM, MVT::i32, Expand);
279 setOperationAction(ISD::SDIV, MVT::i64, Expand);
280 setOperationAction(ISD::SREM, MVT::i64, Expand);
281 setOperationAction(ISD::UDIV, MVT::i64, Expand);
282 setOperationAction(ISD::UREM, MVT::i64, Expand);
284 // Operations not directly supported by Mips.
285 setOperationAction(ISD::BR_CC, MVT::f32, Expand);
286 setOperationAction(ISD::BR_CC, MVT::f64, Expand);
287 setOperationAction(ISD::BR_CC, MVT::i32, Expand);
288 setOperationAction(ISD::BR_CC, MVT::i64, Expand);
289 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
290 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
291 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
292 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
293 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
294 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
295 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
296 setOperationAction(ISD::CTPOP, MVT::i64, Expand);
297 setOperationAction(ISD::CTTZ, MVT::i32, Expand);
298 setOperationAction(ISD::CTTZ, MVT::i64, Expand);
299 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
300 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
301 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
302 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
303 setOperationAction(ISD::ROTL, MVT::i32, Expand);
304 setOperationAction(ISD::ROTL, MVT::i64, Expand);
305 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
306 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
308 if (!Subtarget->hasMips32r2())
309 setOperationAction(ISD::ROTR, MVT::i32, Expand);
311 if (!Subtarget->hasMips64r2())
312 setOperationAction(ISD::ROTR, MVT::i64, Expand);
314 setOperationAction(ISD::FSIN, MVT::f32, Expand);
315 setOperationAction(ISD::FSIN, MVT::f64, Expand);
316 setOperationAction(ISD::FCOS, MVT::f32, Expand);
317 setOperationAction(ISD::FCOS, MVT::f64, Expand);
318 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
319 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
320 setOperationAction(ISD::FPOWI, MVT::f32, Expand);
321 setOperationAction(ISD::FPOW, MVT::f32, Expand);
322 setOperationAction(ISD::FPOW, MVT::f64, Expand);
323 setOperationAction(ISD::FLOG, MVT::f32, Expand);
324 setOperationAction(ISD::FLOG2, MVT::f32, Expand);
325 setOperationAction(ISD::FLOG10, MVT::f32, Expand);
326 setOperationAction(ISD::FEXP, MVT::f32, Expand);
327 setOperationAction(ISD::FMA, MVT::f32, Expand);
328 setOperationAction(ISD::FMA, MVT::f64, Expand);
329 setOperationAction(ISD::FREM, MVT::f32, Expand);
330 setOperationAction(ISD::FREM, MVT::f64, Expand);
332 if (!TM.Options.NoNaNsFPMath) {
333 setOperationAction(ISD::FNEG, MVT::f32, Expand);
334 setOperationAction(ISD::FNEG, MVT::f64, Expand);
337 setOperationAction(ISD::EH_RETURN, MVT::Other, Custom);
339 setOperationAction(ISD::VAARG, MVT::Other, Expand);
340 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
341 setOperationAction(ISD::VAEND, MVT::Other, Expand);
343 // Use the default for now
344 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
345 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
347 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
348 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
349 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
350 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
352 setInsertFencesForAtomic(true);
354 if (!Subtarget->hasSEInReg()) {
355 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
356 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
359 if (!Subtarget->hasBitCount()) {
360 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
361 setOperationAction(ISD::CTLZ, MVT::i64, Expand);
364 if (!Subtarget->hasSwap()) {
365 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
366 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
370 setLoadExtAction(ISD::SEXTLOAD, MVT::i32, Custom);
371 setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Custom);
372 setLoadExtAction(ISD::EXTLOAD, MVT::i32, Custom);
373 setTruncStoreAction(MVT::i64, MVT::i32, Custom);
376 setOperationAction(ISD::TRAP, MVT::Other, Legal);
378 setTargetDAGCombine(ISD::SDIVREM);
379 setTargetDAGCombine(ISD::UDIVREM);
380 setTargetDAGCombine(ISD::SELECT);
381 setTargetDAGCombine(ISD::AND);
382 setTargetDAGCombine(ISD::OR);
383 setTargetDAGCombine(ISD::ADD);
385 setMinFunctionAlignment(HasMips64 ? 3 : 2);
387 setStackPointerRegisterToSaveRestore(IsN64 ? Mips::SP_64 : Mips::SP);
389 setExceptionPointerRegister(IsN64 ? Mips::A0_64 : Mips::A0);
390 setExceptionSelectorRegister(IsN64 ? Mips::A1_64 : Mips::A1);
392 MaxStoresPerMemcpy = 16;
395 const MipsTargetLowering *MipsTargetLowering::create(MipsTargetMachine &TM) {
396 if (TM.getSubtargetImpl()->inMips16Mode())
397 return llvm::createMips16TargetLowering(TM);
399 return llvm::createMipsSETargetLowering(TM);
402 EVT MipsTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
405 return VT.changeVectorElementTypeToInteger();
408 static SDValue performDivRemCombine(SDNode *N, SelectionDAG &DAG,
409 TargetLowering::DAGCombinerInfo &DCI,
410 const MipsSubtarget *Subtarget) {
411 if (DCI.isBeforeLegalizeOps())
414 EVT Ty = N->getValueType(0);
415 unsigned LO = (Ty == MVT::i32) ? Mips::LO0 : Mips::LO0_64;
416 unsigned HI = (Ty == MVT::i32) ? Mips::HI0 : Mips::HI0_64;
417 unsigned Opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem16 :
421 SDValue DivRem = DAG.getNode(Opc, DL, MVT::Glue,
422 N->getOperand(0), N->getOperand(1));
423 SDValue InChain = DAG.getEntryNode();
424 SDValue InGlue = DivRem;
427 if (N->hasAnyUseOfValue(0)) {
428 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, DL, LO, Ty,
430 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
431 InChain = CopyFromLo.getValue(1);
432 InGlue = CopyFromLo.getValue(2);
436 if (N->hasAnyUseOfValue(1)) {
437 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, DL,
439 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
445 static Mips::CondCode condCodeToFCC(ISD::CondCode CC) {
447 default: llvm_unreachable("Unknown fp condition code!");
449 case ISD::SETOEQ: return Mips::FCOND_OEQ;
450 case ISD::SETUNE: return Mips::FCOND_UNE;
452 case ISD::SETOLT: return Mips::FCOND_OLT;
454 case ISD::SETOGT: return Mips::FCOND_OGT;
456 case ISD::SETOLE: return Mips::FCOND_OLE;
458 case ISD::SETOGE: return Mips::FCOND_OGE;
459 case ISD::SETULT: return Mips::FCOND_ULT;
460 case ISD::SETULE: return Mips::FCOND_ULE;
461 case ISD::SETUGT: return Mips::FCOND_UGT;
462 case ISD::SETUGE: return Mips::FCOND_UGE;
463 case ISD::SETUO: return Mips::FCOND_UN;
464 case ISD::SETO: return Mips::FCOND_OR;
466 case ISD::SETONE: return Mips::FCOND_ONE;
467 case ISD::SETUEQ: return Mips::FCOND_UEQ;
472 /// This function returns true if the floating point conditional branches and
473 /// conditional moves which use condition code CC should be inverted.
474 static bool invertFPCondCodeUser(Mips::CondCode CC) {
475 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
478 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
479 "Illegal Condition Code");
484 // Creates and returns an FPCmp node from a setcc node.
485 // Returns Op if setcc is not a floating point comparison.
486 static SDValue createFPCmp(SelectionDAG &DAG, const SDValue &Op) {
487 // must be a SETCC node
488 if (Op.getOpcode() != ISD::SETCC)
491 SDValue LHS = Op.getOperand(0);
493 if (!LHS.getValueType().isFloatingPoint())
496 SDValue RHS = Op.getOperand(1);
499 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
500 // node if necessary.
501 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
503 return DAG.getNode(MipsISD::FPCmp, DL, MVT::Glue, LHS, RHS,
504 DAG.getConstant(condCodeToFCC(CC), MVT::i32));
507 // Creates and returns a CMovFPT/F node.
508 static SDValue createCMovFP(SelectionDAG &DAG, SDValue Cond, SDValue True,
509 SDValue False, SDLoc DL) {
510 ConstantSDNode *CC = cast<ConstantSDNode>(Cond.getOperand(2));
511 bool invert = invertFPCondCodeUser((Mips::CondCode)CC->getSExtValue());
512 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
514 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
515 True.getValueType(), True, FCC0, False, Cond);
518 static SDValue performSELECTCombine(SDNode *N, SelectionDAG &DAG,
519 TargetLowering::DAGCombinerInfo &DCI,
520 const MipsSubtarget *Subtarget) {
521 if (DCI.isBeforeLegalizeOps())
524 SDValue SetCC = N->getOperand(0);
526 if ((SetCC.getOpcode() != ISD::SETCC) ||
527 !SetCC.getOperand(0).getValueType().isInteger())
530 SDValue False = N->getOperand(2);
531 EVT FalseTy = False.getValueType();
533 if (!FalseTy.isInteger())
536 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(False);
538 if (!CN || CN->getZExtValue())
542 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
543 SDValue True = N->getOperand(1);
545 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
546 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
548 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
551 static SDValue performANDCombine(SDNode *N, SelectionDAG &DAG,
552 TargetLowering::DAGCombinerInfo &DCI,
553 const MipsSubtarget *Subtarget) {
554 // Pattern match EXT.
555 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
556 // => ext $dst, $src, size, pos
557 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
560 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
561 unsigned ShiftRightOpc = ShiftRight.getOpcode();
563 // Op's first operand must be a shift right.
564 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
567 // The second operand of the shift must be an immediate.
569 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
572 uint64_t Pos = CN->getZExtValue();
573 uint64_t SMPos, SMSize;
575 // Op's second operand must be a shifted mask.
576 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
577 !isShiftedMask(CN->getZExtValue(), SMPos, SMSize))
580 // Return if the shifted mask does not start at bit 0 or the sum of its size
581 // and Pos exceeds the word's size.
582 EVT ValTy = N->getValueType(0);
583 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
586 return DAG.getNode(MipsISD::Ext, SDLoc(N), ValTy,
587 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
588 DAG.getConstant(SMSize, MVT::i32));
591 static SDValue performORCombine(SDNode *N, SelectionDAG &DAG,
592 TargetLowering::DAGCombinerInfo &DCI,
593 const MipsSubtarget *Subtarget) {
594 // Pattern match INS.
595 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
596 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
597 // => ins $dst, $src, size, pos, $src1
598 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
601 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
602 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
605 // See if Op's first operand matches (and $src1 , mask0).
606 if (And0.getOpcode() != ISD::AND)
609 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
610 !isShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
613 // See if Op's second operand matches (and (shl $src, pos), mask1).
614 if (And1.getOpcode() != ISD::AND)
617 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
618 !isShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
621 // The shift masks must have the same position and size.
622 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
625 SDValue Shl = And1.getOperand(0);
626 if (Shl.getOpcode() != ISD::SHL)
629 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
632 unsigned Shamt = CN->getZExtValue();
634 // Return if the shift amount and the first bit position of mask are not the
636 EVT ValTy = N->getValueType(0);
637 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
640 return DAG.getNode(MipsISD::Ins, SDLoc(N), ValTy, Shl.getOperand(0),
641 DAG.getConstant(SMPos0, MVT::i32),
642 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
645 static SDValue performADDCombine(SDNode *N, SelectionDAG &DAG,
646 TargetLowering::DAGCombinerInfo &DCI,
647 const MipsSubtarget *Subtarget) {
648 // (add v0, (add v1, abs_lo(tjt))) => (add (add v0, v1), abs_lo(tjt))
650 if (DCI.isBeforeLegalizeOps())
653 SDValue Add = N->getOperand(1);
655 if (Add.getOpcode() != ISD::ADD)
658 SDValue Lo = Add.getOperand(1);
660 if ((Lo.getOpcode() != MipsISD::Lo) ||
661 (Lo.getOperand(0).getOpcode() != ISD::TargetJumpTable))
664 EVT ValTy = N->getValueType(0);
667 SDValue Add1 = DAG.getNode(ISD::ADD, DL, ValTy, N->getOperand(0),
669 return DAG.getNode(ISD::ADD, DL, ValTy, Add1, Lo);
672 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
674 SelectionDAG &DAG = DCI.DAG;
675 unsigned Opc = N->getOpcode();
681 return performDivRemCombine(N, DAG, DCI, Subtarget);
683 return performSELECTCombine(N, DAG, DCI, Subtarget);
685 return performANDCombine(N, DAG, DCI, Subtarget);
687 return performORCombine(N, DAG, DCI, Subtarget);
689 return performADDCombine(N, DAG, DCI, Subtarget);
696 MipsTargetLowering::LowerOperationWrapper(SDNode *N,
697 SmallVectorImpl<SDValue> &Results,
698 SelectionDAG &DAG) const {
699 SDValue Res = LowerOperation(SDValue(N, 0), DAG);
701 for (unsigned I = 0, E = Res->getNumValues(); I != E; ++I)
702 Results.push_back(Res.getValue(I));
706 MipsTargetLowering::ReplaceNodeResults(SDNode *N,
707 SmallVectorImpl<SDValue> &Results,
708 SelectionDAG &DAG) const {
709 return LowerOperationWrapper(N, Results, DAG);
712 SDValue MipsTargetLowering::
713 LowerOperation(SDValue Op, SelectionDAG &DAG) const
715 switch (Op.getOpcode())
717 case ISD::BR_JT: return lowerBR_JT(Op, DAG);
718 case ISD::BRCOND: return lowerBRCOND(Op, DAG);
719 case ISD::ConstantPool: return lowerConstantPool(Op, DAG);
720 case ISD::GlobalAddress: return lowerGlobalAddress(Op, DAG);
721 case ISD::BlockAddress: return lowerBlockAddress(Op, DAG);
722 case ISD::GlobalTLSAddress: return lowerGlobalTLSAddress(Op, DAG);
723 case ISD::JumpTable: return lowerJumpTable(Op, DAG);
724 case ISD::SELECT: return lowerSELECT(Op, DAG);
725 case ISD::SELECT_CC: return lowerSELECT_CC(Op, DAG);
726 case ISD::SETCC: return lowerSETCC(Op, DAG);
727 case ISD::VASTART: return lowerVASTART(Op, DAG);
728 case ISD::FCOPYSIGN: return lowerFCOPYSIGN(Op, DAG);
729 case ISD::FABS: return lowerFABS(Op, DAG);
730 case ISD::FRAMEADDR: return lowerFRAMEADDR(Op, DAG);
731 case ISD::RETURNADDR: return lowerRETURNADDR(Op, DAG);
732 case ISD::EH_RETURN: return lowerEH_RETURN(Op, DAG);
733 case ISD::ATOMIC_FENCE: return lowerATOMIC_FENCE(Op, DAG);
734 case ISD::SHL_PARTS: return lowerShiftLeftParts(Op, DAG);
735 case ISD::SRA_PARTS: return lowerShiftRightParts(Op, DAG, true);
736 case ISD::SRL_PARTS: return lowerShiftRightParts(Op, DAG, false);
737 case ISD::LOAD: return lowerLOAD(Op, DAG);
738 case ISD::STORE: return lowerSTORE(Op, DAG);
739 case ISD::ADD: return lowerADD(Op, DAG);
740 case ISD::FP_TO_SINT: return lowerFP_TO_SINT(Op, DAG);
745 //===----------------------------------------------------------------------===//
746 // Lower helper functions
747 //===----------------------------------------------------------------------===//
749 // addLiveIn - This helper function adds the specified physical register to the
750 // MachineFunction as a live in value. It also creates a corresponding
751 // virtual register for it.
753 addLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
755 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
756 MF.getRegInfo().addLiveIn(PReg, VReg);
760 static MachineBasicBlock *expandPseudoDIV(MachineInstr *MI,
761 MachineBasicBlock &MBB,
762 const TargetInstrInfo &TII,
767 // Insert instruction "teq $divisor_reg, $zero, 7".
768 MachineBasicBlock::iterator I(MI);
769 MachineInstrBuilder MIB;
770 MIB = BuildMI(MBB, llvm::next(I), MI->getDebugLoc(), TII.get(Mips::TEQ))
771 .addOperand(MI->getOperand(2)).addReg(Mips::ZERO).addImm(7);
773 // Use the 32-bit sub-register if this is a 64-bit division.
775 MIB->getOperand(0).setSubReg(Mips::sub_32);
781 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
782 MachineBasicBlock *BB) const {
783 switch (MI->getOpcode()) {
785 llvm_unreachable("Unexpected instr type to insert");
786 case Mips::ATOMIC_LOAD_ADD_I8:
787 return emitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
788 case Mips::ATOMIC_LOAD_ADD_I16:
789 return emitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
790 case Mips::ATOMIC_LOAD_ADD_I32:
791 return emitAtomicBinary(MI, BB, 4, Mips::ADDu);
792 case Mips::ATOMIC_LOAD_ADD_I64:
793 return emitAtomicBinary(MI, BB, 8, Mips::DADDu);
795 case Mips::ATOMIC_LOAD_AND_I8:
796 return emitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
797 case Mips::ATOMIC_LOAD_AND_I16:
798 return emitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
799 case Mips::ATOMIC_LOAD_AND_I32:
800 return emitAtomicBinary(MI, BB, 4, Mips::AND);
801 case Mips::ATOMIC_LOAD_AND_I64:
802 return emitAtomicBinary(MI, BB, 8, Mips::AND64);
804 case Mips::ATOMIC_LOAD_OR_I8:
805 return emitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
806 case Mips::ATOMIC_LOAD_OR_I16:
807 return emitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
808 case Mips::ATOMIC_LOAD_OR_I32:
809 return emitAtomicBinary(MI, BB, 4, Mips::OR);
810 case Mips::ATOMIC_LOAD_OR_I64:
811 return emitAtomicBinary(MI, BB, 8, Mips::OR64);
813 case Mips::ATOMIC_LOAD_XOR_I8:
814 return emitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
815 case Mips::ATOMIC_LOAD_XOR_I16:
816 return emitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
817 case Mips::ATOMIC_LOAD_XOR_I32:
818 return emitAtomicBinary(MI, BB, 4, Mips::XOR);
819 case Mips::ATOMIC_LOAD_XOR_I64:
820 return emitAtomicBinary(MI, BB, 8, Mips::XOR64);
822 case Mips::ATOMIC_LOAD_NAND_I8:
823 return emitAtomicBinaryPartword(MI, BB, 1, 0, true);
824 case Mips::ATOMIC_LOAD_NAND_I16:
825 return emitAtomicBinaryPartword(MI, BB, 2, 0, true);
826 case Mips::ATOMIC_LOAD_NAND_I32:
827 return emitAtomicBinary(MI, BB, 4, 0, true);
828 case Mips::ATOMIC_LOAD_NAND_I64:
829 return emitAtomicBinary(MI, BB, 8, 0, true);
831 case Mips::ATOMIC_LOAD_SUB_I8:
832 return emitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
833 case Mips::ATOMIC_LOAD_SUB_I16:
834 return emitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
835 case Mips::ATOMIC_LOAD_SUB_I32:
836 return emitAtomicBinary(MI, BB, 4, Mips::SUBu);
837 case Mips::ATOMIC_LOAD_SUB_I64:
838 return emitAtomicBinary(MI, BB, 8, Mips::DSUBu);
840 case Mips::ATOMIC_SWAP_I8:
841 return emitAtomicBinaryPartword(MI, BB, 1, 0);
842 case Mips::ATOMIC_SWAP_I16:
843 return emitAtomicBinaryPartword(MI, BB, 2, 0);
844 case Mips::ATOMIC_SWAP_I32:
845 return emitAtomicBinary(MI, BB, 4, 0);
846 case Mips::ATOMIC_SWAP_I64:
847 return emitAtomicBinary(MI, BB, 8, 0);
849 case Mips::ATOMIC_CMP_SWAP_I8:
850 return emitAtomicCmpSwapPartword(MI, BB, 1);
851 case Mips::ATOMIC_CMP_SWAP_I16:
852 return emitAtomicCmpSwapPartword(MI, BB, 2);
853 case Mips::ATOMIC_CMP_SWAP_I32:
854 return emitAtomicCmpSwap(MI, BB, 4);
855 case Mips::ATOMIC_CMP_SWAP_I64:
856 return emitAtomicCmpSwap(MI, BB, 8);
857 case Mips::PseudoSDIV:
858 case Mips::PseudoUDIV:
859 return expandPseudoDIV(MI, *BB, *getTargetMachine().getInstrInfo(), false);
860 case Mips::PseudoDSDIV:
861 case Mips::PseudoDUDIV:
862 return expandPseudoDIV(MI, *BB, *getTargetMachine().getInstrInfo(), true);
866 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
867 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
869 MipsTargetLowering::emitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
870 unsigned Size, unsigned BinOpcode,
872 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
874 MachineFunction *MF = BB->getParent();
875 MachineRegisterInfo &RegInfo = MF->getRegInfo();
876 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
877 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
878 DebugLoc DL = MI->getDebugLoc();
879 unsigned LL, SC, AND, NOR, ZERO, BEQ;
894 ZERO = Mips::ZERO_64;
898 unsigned OldVal = MI->getOperand(0).getReg();
899 unsigned Ptr = MI->getOperand(1).getReg();
900 unsigned Incr = MI->getOperand(2).getReg();
902 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
903 unsigned AndRes = RegInfo.createVirtualRegister(RC);
904 unsigned Success = RegInfo.createVirtualRegister(RC);
906 // insert new blocks after the current block
907 const BasicBlock *LLVM_BB = BB->getBasicBlock();
908 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
909 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
910 MachineFunction::iterator It = BB;
912 MF->insert(It, loopMBB);
913 MF->insert(It, exitMBB);
915 // Transfer the remainder of BB and its successor edges to exitMBB.
916 exitMBB->splice(exitMBB->begin(), BB,
917 llvm::next(MachineBasicBlock::iterator(MI)),
919 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
923 // fallthrough --> loopMBB
924 BB->addSuccessor(loopMBB);
925 loopMBB->addSuccessor(loopMBB);
926 loopMBB->addSuccessor(exitMBB);
930 // <binop> storeval, oldval, incr
931 // sc success, storeval, 0(ptr)
932 // beq success, $0, loopMBB
934 BuildMI(BB, DL, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
936 // and andres, oldval, incr
937 // nor storeval, $0, andres
938 BuildMI(BB, DL, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
939 BuildMI(BB, DL, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
940 } else if (BinOpcode) {
941 // <binop> storeval, oldval, incr
942 BuildMI(BB, DL, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
946 BuildMI(BB, DL, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
947 BuildMI(BB, DL, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
949 MI->eraseFromParent(); // The instruction is gone now.
955 MipsTargetLowering::emitAtomicBinaryPartword(MachineInstr *MI,
956 MachineBasicBlock *BB,
957 unsigned Size, unsigned BinOpcode,
959 assert((Size == 1 || Size == 2) &&
960 "Unsupported size for EmitAtomicBinaryPartial.");
962 MachineFunction *MF = BB->getParent();
963 MachineRegisterInfo &RegInfo = MF->getRegInfo();
964 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
965 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
966 DebugLoc DL = MI->getDebugLoc();
968 unsigned Dest = MI->getOperand(0).getReg();
969 unsigned Ptr = MI->getOperand(1).getReg();
970 unsigned Incr = MI->getOperand(2).getReg();
972 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
973 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
974 unsigned Mask = RegInfo.createVirtualRegister(RC);
975 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
976 unsigned NewVal = RegInfo.createVirtualRegister(RC);
977 unsigned OldVal = RegInfo.createVirtualRegister(RC);
978 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
979 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
980 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
981 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
982 unsigned AndRes = RegInfo.createVirtualRegister(RC);
983 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
984 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
985 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
986 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
987 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
988 unsigned SllRes = RegInfo.createVirtualRegister(RC);
989 unsigned Success = RegInfo.createVirtualRegister(RC);
991 // insert new blocks after the current block
992 const BasicBlock *LLVM_BB = BB->getBasicBlock();
993 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
994 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
995 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
996 MachineFunction::iterator It = BB;
998 MF->insert(It, loopMBB);
999 MF->insert(It, sinkMBB);
1000 MF->insert(It, exitMBB);
1002 // Transfer the remainder of BB and its successor edges to exitMBB.
1003 exitMBB->splice(exitMBB->begin(), BB,
1004 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1005 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1007 BB->addSuccessor(loopMBB);
1008 loopMBB->addSuccessor(loopMBB);
1009 loopMBB->addSuccessor(sinkMBB);
1010 sinkMBB->addSuccessor(exitMBB);
1013 // addiu masklsb2,$0,-4 # 0xfffffffc
1014 // and alignedaddr,ptr,masklsb2
1015 // andi ptrlsb2,ptr,3
1016 // sll shiftamt,ptrlsb2,3
1017 // ori maskupper,$0,255 # 0xff
1018 // sll mask,maskupper,shiftamt
1019 // nor mask2,$0,mask
1020 // sll incr2,incr,shiftamt
1022 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1023 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1024 .addReg(Mips::ZERO).addImm(-4);
1025 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1026 .addReg(Ptr).addReg(MaskLSB2);
1027 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1028 if (Subtarget->isLittle()) {
1029 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1031 unsigned Off = RegInfo.createVirtualRegister(RC);
1032 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1033 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1034 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1036 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1037 .addReg(Mips::ZERO).addImm(MaskImm);
1038 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1039 .addReg(MaskUpper).addReg(ShiftAmt);
1040 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1041 BuildMI(BB, DL, TII->get(Mips::SLLV), Incr2).addReg(Incr).addReg(ShiftAmt);
1043 // atomic.load.binop
1045 // ll oldval,0(alignedaddr)
1046 // binop binopres,oldval,incr2
1047 // and newval,binopres,mask
1048 // and maskedoldval0,oldval,mask2
1049 // or storeval,maskedoldval0,newval
1050 // sc success,storeval,0(alignedaddr)
1051 // beq success,$0,loopMBB
1055 // ll oldval,0(alignedaddr)
1056 // and newval,incr2,mask
1057 // and maskedoldval0,oldval,mask2
1058 // or storeval,maskedoldval0,newval
1059 // sc success,storeval,0(alignedaddr)
1060 // beq success,$0,loopMBB
1063 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1065 // and andres, oldval, incr2
1066 // nor binopres, $0, andres
1067 // and newval, binopres, mask
1068 BuildMI(BB, DL, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1069 BuildMI(BB, DL, TII->get(Mips::NOR), BinOpRes)
1070 .addReg(Mips::ZERO).addReg(AndRes);
1071 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1072 } else if (BinOpcode) {
1073 // <binop> binopres, oldval, incr2
1074 // and newval, binopres, mask
1075 BuildMI(BB, DL, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1076 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1077 } else {// atomic.swap
1078 // and newval, incr2, mask
1079 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1082 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1083 .addReg(OldVal).addReg(Mask2);
1084 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1085 .addReg(MaskedOldVal0).addReg(NewVal);
1086 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1087 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1088 BuildMI(BB, DL, TII->get(Mips::BEQ))
1089 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1092 // and maskedoldval1,oldval,mask
1093 // srl srlres,maskedoldval1,shiftamt
1094 // sll sllres,srlres,24
1095 // sra dest,sllres,24
1097 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1099 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1100 .addReg(OldVal).addReg(Mask);
1101 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1102 .addReg(MaskedOldVal1).addReg(ShiftAmt);
1103 BuildMI(BB, DL, TII->get(Mips::SLL), SllRes)
1104 .addReg(SrlRes).addImm(ShiftImm);
1105 BuildMI(BB, DL, TII->get(Mips::SRA), Dest)
1106 .addReg(SllRes).addImm(ShiftImm);
1108 MI->eraseFromParent(); // The instruction is gone now.
1114 MipsTargetLowering::emitAtomicCmpSwap(MachineInstr *MI,
1115 MachineBasicBlock *BB,
1116 unsigned Size) const {
1117 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1119 MachineFunction *MF = BB->getParent();
1120 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1121 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1122 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1123 DebugLoc DL = MI->getDebugLoc();
1124 unsigned LL, SC, ZERO, BNE, BEQ;
1136 ZERO = Mips::ZERO_64;
1141 unsigned Dest = MI->getOperand(0).getReg();
1142 unsigned Ptr = MI->getOperand(1).getReg();
1143 unsigned OldVal = MI->getOperand(2).getReg();
1144 unsigned NewVal = MI->getOperand(3).getReg();
1146 unsigned Success = RegInfo.createVirtualRegister(RC);
1148 // insert new blocks after the current block
1149 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1150 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1151 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1152 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1153 MachineFunction::iterator It = BB;
1155 MF->insert(It, loop1MBB);
1156 MF->insert(It, loop2MBB);
1157 MF->insert(It, exitMBB);
1159 // Transfer the remainder of BB and its successor edges to exitMBB.
1160 exitMBB->splice(exitMBB->begin(), BB,
1161 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1162 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1166 // fallthrough --> loop1MBB
1167 BB->addSuccessor(loop1MBB);
1168 loop1MBB->addSuccessor(exitMBB);
1169 loop1MBB->addSuccessor(loop2MBB);
1170 loop2MBB->addSuccessor(loop1MBB);
1171 loop2MBB->addSuccessor(exitMBB);
1175 // bne dest, oldval, exitMBB
1177 BuildMI(BB, DL, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1178 BuildMI(BB, DL, TII->get(BNE))
1179 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1182 // sc success, newval, 0(ptr)
1183 // beq success, $0, loop1MBB
1185 BuildMI(BB, DL, TII->get(SC), Success)
1186 .addReg(NewVal).addReg(Ptr).addImm(0);
1187 BuildMI(BB, DL, TII->get(BEQ))
1188 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1190 MI->eraseFromParent(); // The instruction is gone now.
1196 MipsTargetLowering::emitAtomicCmpSwapPartword(MachineInstr *MI,
1197 MachineBasicBlock *BB,
1198 unsigned Size) const {
1199 assert((Size == 1 || Size == 2) &&
1200 "Unsupported size for EmitAtomicCmpSwapPartial.");
1202 MachineFunction *MF = BB->getParent();
1203 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1204 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1205 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1206 DebugLoc DL = MI->getDebugLoc();
1208 unsigned Dest = MI->getOperand(0).getReg();
1209 unsigned Ptr = MI->getOperand(1).getReg();
1210 unsigned CmpVal = MI->getOperand(2).getReg();
1211 unsigned NewVal = MI->getOperand(3).getReg();
1213 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1214 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1215 unsigned Mask = RegInfo.createVirtualRegister(RC);
1216 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1217 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1218 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1219 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1220 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1221 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1222 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1223 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1224 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1225 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1226 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1227 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1228 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1229 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1230 unsigned Success = RegInfo.createVirtualRegister(RC);
1232 // insert new blocks after the current block
1233 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1234 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1235 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1236 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1237 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1238 MachineFunction::iterator It = BB;
1240 MF->insert(It, loop1MBB);
1241 MF->insert(It, loop2MBB);
1242 MF->insert(It, sinkMBB);
1243 MF->insert(It, exitMBB);
1245 // Transfer the remainder of BB and its successor edges to exitMBB.
1246 exitMBB->splice(exitMBB->begin(), BB,
1247 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1248 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1250 BB->addSuccessor(loop1MBB);
1251 loop1MBB->addSuccessor(sinkMBB);
1252 loop1MBB->addSuccessor(loop2MBB);
1253 loop2MBB->addSuccessor(loop1MBB);
1254 loop2MBB->addSuccessor(sinkMBB);
1255 sinkMBB->addSuccessor(exitMBB);
1257 // FIXME: computation of newval2 can be moved to loop2MBB.
1259 // addiu masklsb2,$0,-4 # 0xfffffffc
1260 // and alignedaddr,ptr,masklsb2
1261 // andi ptrlsb2,ptr,3
1262 // sll shiftamt,ptrlsb2,3
1263 // ori maskupper,$0,255 # 0xff
1264 // sll mask,maskupper,shiftamt
1265 // nor mask2,$0,mask
1266 // andi maskedcmpval,cmpval,255
1267 // sll shiftedcmpval,maskedcmpval,shiftamt
1268 // andi maskednewval,newval,255
1269 // sll shiftednewval,maskednewval,shiftamt
1270 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1271 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1272 .addReg(Mips::ZERO).addImm(-4);
1273 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1274 .addReg(Ptr).addReg(MaskLSB2);
1275 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1276 if (Subtarget->isLittle()) {
1277 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1279 unsigned Off = RegInfo.createVirtualRegister(RC);
1280 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1281 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1282 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1284 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1285 .addReg(Mips::ZERO).addImm(MaskImm);
1286 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1287 .addReg(MaskUpper).addReg(ShiftAmt);
1288 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1289 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedCmpVal)
1290 .addReg(CmpVal).addImm(MaskImm);
1291 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedCmpVal)
1292 .addReg(MaskedCmpVal).addReg(ShiftAmt);
1293 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedNewVal)
1294 .addReg(NewVal).addImm(MaskImm);
1295 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedNewVal)
1296 .addReg(MaskedNewVal).addReg(ShiftAmt);
1299 // ll oldval,0(alginedaddr)
1300 // and maskedoldval0,oldval,mask
1301 // bne maskedoldval0,shiftedcmpval,sinkMBB
1303 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1304 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1305 .addReg(OldVal).addReg(Mask);
1306 BuildMI(BB, DL, TII->get(Mips::BNE))
1307 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1310 // and maskedoldval1,oldval,mask2
1311 // or storeval,maskedoldval1,shiftednewval
1312 // sc success,storeval,0(alignedaddr)
1313 // beq success,$0,loop1MBB
1315 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1316 .addReg(OldVal).addReg(Mask2);
1317 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1318 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1319 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1320 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1321 BuildMI(BB, DL, TII->get(Mips::BEQ))
1322 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1325 // srl srlres,maskedoldval0,shiftamt
1326 // sll sllres,srlres,24
1327 // sra dest,sllres,24
1329 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1331 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1332 .addReg(MaskedOldVal0).addReg(ShiftAmt);
1333 BuildMI(BB, DL, TII->get(Mips::SLL), SllRes)
1334 .addReg(SrlRes).addImm(ShiftImm);
1335 BuildMI(BB, DL, TII->get(Mips::SRA), Dest)
1336 .addReg(SllRes).addImm(ShiftImm);
1338 MI->eraseFromParent(); // The instruction is gone now.
1343 //===----------------------------------------------------------------------===//
1344 // Misc Lower Operation implementation
1345 //===----------------------------------------------------------------------===//
1346 SDValue MipsTargetLowering::lowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
1347 SDValue Chain = Op.getOperand(0);
1348 SDValue Table = Op.getOperand(1);
1349 SDValue Index = Op.getOperand(2);
1351 EVT PTy = getPointerTy();
1352 unsigned EntrySize =
1353 DAG.getMachineFunction().getJumpTableInfo()->getEntrySize(*getDataLayout());
1355 Index = DAG.getNode(ISD::MUL, DL, PTy, Index,
1356 DAG.getConstant(EntrySize, PTy));
1357 SDValue Addr = DAG.getNode(ISD::ADD, DL, PTy, Index, Table);
1359 EVT MemVT = EVT::getIntegerVT(*DAG.getContext(), EntrySize * 8);
1360 Addr = DAG.getExtLoad(ISD::SEXTLOAD, DL, PTy, Chain, Addr,
1361 MachinePointerInfo::getJumpTable(), MemVT, false, false,
1363 Chain = Addr.getValue(1);
1365 if ((getTargetMachine().getRelocationModel() == Reloc::PIC_) || IsN64) {
1366 // For PIC, the sequence is:
1367 // BRIND(load(Jumptable + index) + RelocBase)
1368 // RelocBase can be JumpTable, GOT or some sort of global base.
1369 Addr = DAG.getNode(ISD::ADD, DL, PTy, Addr,
1370 getPICJumpTableRelocBase(Table, DAG));
1373 return DAG.getNode(ISD::BRIND, DL, MVT::Other, Chain, Addr);
1376 SDValue MipsTargetLowering::
1377 lowerBRCOND(SDValue Op, SelectionDAG &DAG) const
1379 // The first operand is the chain, the second is the condition, the third is
1380 // the block to branch to if the condition is true.
1381 SDValue Chain = Op.getOperand(0);
1382 SDValue Dest = Op.getOperand(2);
1385 SDValue CondRes = createFPCmp(DAG, Op.getOperand(1));
1387 // Return if flag is not set by a floating point comparison.
1388 if (CondRes.getOpcode() != MipsISD::FPCmp)
1391 SDValue CCNode = CondRes.getOperand(2);
1393 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1394 unsigned Opc = invertFPCondCodeUser(CC) ? Mips::BRANCH_F : Mips::BRANCH_T;
1395 SDValue BrCode = DAG.getConstant(Opc, MVT::i32);
1396 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
1397 return DAG.getNode(MipsISD::FPBrcond, DL, Op.getValueType(), Chain, BrCode,
1398 FCC0, Dest, CondRes);
1401 SDValue MipsTargetLowering::
1402 lowerSELECT(SDValue Op, SelectionDAG &DAG) const
1404 SDValue Cond = createFPCmp(DAG, Op.getOperand(0));
1406 // Return if flag is not set by a floating point comparison.
1407 if (Cond.getOpcode() != MipsISD::FPCmp)
1410 return createCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1414 SDValue MipsTargetLowering::
1415 lowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
1418 EVT Ty = Op.getOperand(0).getValueType();
1419 SDValue Cond = DAG.getNode(ISD::SETCC, DL,
1420 getSetCCResultType(*DAG.getContext(), Ty),
1421 Op.getOperand(0), Op.getOperand(1),
1424 return DAG.getNode(ISD::SELECT, DL, Op.getValueType(), Cond, Op.getOperand(2),
1428 SDValue MipsTargetLowering::lowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1429 SDValue Cond = createFPCmp(DAG, Op);
1431 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1432 "Floating point operand expected.");
1434 SDValue True = DAG.getConstant(1, MVT::i32);
1435 SDValue False = DAG.getConstant(0, MVT::i32);
1437 return createCMovFP(DAG, Cond, True, False, SDLoc(Op));
1440 SDValue MipsTargetLowering::lowerGlobalAddress(SDValue Op,
1441 SelectionDAG &DAG) const {
1442 // FIXME there isn't actually debug info here
1444 EVT Ty = Op.getValueType();
1445 GlobalAddressSDNode *N = cast<GlobalAddressSDNode>(Op);
1446 const GlobalValue *GV = N->getGlobal();
1448 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1449 const MipsTargetObjectFile &TLOF =
1450 (const MipsTargetObjectFile&)getObjFileLowering();
1452 // %gp_rel relocation
1453 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1454 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, 0,
1456 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, DL,
1457 DAG.getVTList(MVT::i32), &GA, 1);
1458 SDValue GPReg = DAG.getRegister(Mips::GP, MVT::i32);
1459 return DAG.getNode(ISD::ADD, DL, MVT::i32, GPReg, GPRelNode);
1462 // %hi/%lo relocation
1463 return getAddrNonPIC(N, Ty, DAG);
1466 if (GV->hasInternalLinkage() || (GV->hasLocalLinkage() && !isa<Function>(GV)))
1467 return getAddrLocal(N, Ty, DAG, HasMips64);
1470 return getAddrGlobalLargeGOT(N, Ty, DAG, MipsII::MO_GOT_HI16,
1471 MipsII::MO_GOT_LO16, DAG.getEntryNode(),
1472 MachinePointerInfo::getGOT());
1474 return getAddrGlobal(N, Ty, DAG,
1475 HasMips64 ? MipsII::MO_GOT_DISP : MipsII::MO_GOT16,
1476 DAG.getEntryNode(), MachinePointerInfo::getGOT());
1479 SDValue MipsTargetLowering::lowerBlockAddress(SDValue Op,
1480 SelectionDAG &DAG) const {
1481 BlockAddressSDNode *N = cast<BlockAddressSDNode>(Op);
1482 EVT Ty = Op.getValueType();
1484 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64)
1485 return getAddrNonPIC(N, Ty, DAG);
1487 return getAddrLocal(N, Ty, DAG, HasMips64);
1490 SDValue MipsTargetLowering::
1491 lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1493 // If the relocation model is PIC, use the General Dynamic TLS Model or
1494 // Local Dynamic TLS model, otherwise use the Initial Exec or
1495 // Local Exec TLS Model.
1497 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1499 const GlobalValue *GV = GA->getGlobal();
1500 EVT PtrVT = getPointerTy();
1502 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
1504 if (model == TLSModel::GeneralDynamic || model == TLSModel::LocalDynamic) {
1505 // General Dynamic and Local Dynamic TLS Model.
1506 unsigned Flag = (model == TLSModel::LocalDynamic) ? MipsII::MO_TLSLDM
1509 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, Flag);
1510 SDValue Argument = DAG.getNode(MipsISD::Wrapper, DL, PtrVT,
1511 getGlobalReg(DAG, PtrVT), TGA);
1512 unsigned PtrSize = PtrVT.getSizeInBits();
1513 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1515 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1519 Entry.Node = Argument;
1521 Args.push_back(Entry);
1523 TargetLowering::CallLoweringInfo CLI(DAG.getEntryNode(), PtrTy,
1524 false, false, false, false, 0, CallingConv::C,
1525 /*IsTailCall=*/false, /*doesNotRet=*/false,
1526 /*isReturnValueUsed=*/true,
1527 TlsGetAddr, Args, DAG, DL);
1528 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1530 SDValue Ret = CallResult.first;
1532 if (model != TLSModel::LocalDynamic)
1535 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1536 MipsII::MO_DTPREL_HI);
1537 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1538 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1539 MipsII::MO_DTPREL_LO);
1540 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1541 SDValue Add = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Ret);
1542 return DAG.getNode(ISD::ADD, DL, PtrVT, Add, Lo);
1546 if (model == TLSModel::InitialExec) {
1547 // Initial Exec TLS Model
1548 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1549 MipsII::MO_GOTTPREL);
1550 TGA = DAG.getNode(MipsISD::Wrapper, DL, PtrVT, getGlobalReg(DAG, PtrVT),
1552 Offset = DAG.getLoad(PtrVT, DL,
1553 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1554 false, false, false, 0);
1556 // Local Exec TLS Model
1557 assert(model == TLSModel::LocalExec);
1558 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1559 MipsII::MO_TPREL_HI);
1560 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1561 MipsII::MO_TPREL_LO);
1562 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1563 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1564 Offset = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
1567 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, DL, PtrVT);
1568 return DAG.getNode(ISD::ADD, DL, PtrVT, ThreadPointer, Offset);
1571 SDValue MipsTargetLowering::
1572 lowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1574 JumpTableSDNode *N = cast<JumpTableSDNode>(Op);
1575 EVT Ty = Op.getValueType();
1577 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64)
1578 return getAddrNonPIC(N, Ty, DAG);
1580 return getAddrLocal(N, Ty, DAG, HasMips64);
1583 SDValue MipsTargetLowering::
1584 lowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1586 // gp_rel relocation
1587 // FIXME: we should reference the constant pool using small data sections,
1588 // but the asm printer currently doesn't support this feature without
1589 // hacking it. This feature should come soon so we can uncomment the
1591 //if (IsInSmallSection(C->getType())) {
1592 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1593 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1594 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1595 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1596 EVT Ty = Op.getValueType();
1598 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64)
1599 return getAddrNonPIC(N, Ty, DAG);
1601 return getAddrLocal(N, Ty, DAG, HasMips64);
1604 SDValue MipsTargetLowering::lowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1605 MachineFunction &MF = DAG.getMachineFunction();
1606 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1609 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1612 // vastart just stores the address of the VarArgsFrameIndex slot into the
1613 // memory location argument.
1614 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1615 return DAG.getStore(Op.getOperand(0), DL, FI, Op.getOperand(1),
1616 MachinePointerInfo(SV), false, false, 0);
1619 static SDValue lowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1620 EVT TyX = Op.getOperand(0).getValueType();
1621 EVT TyY = Op.getOperand(1).getValueType();
1622 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1623 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1627 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1629 SDValue X = (TyX == MVT::f32) ?
1630 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1631 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1633 SDValue Y = (TyY == MVT::f32) ?
1634 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1635 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1639 // ext E, Y, 31, 1 ; extract bit31 of Y
1640 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1641 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1642 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1645 // srl SrlX, SllX, 1
1647 // sll SllY, SrlX, 31
1648 // or Or, SrlX, SllY
1649 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1650 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1651 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1652 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1653 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1656 if (TyX == MVT::f32)
1657 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1659 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1660 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1661 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1664 static SDValue lowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1665 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1666 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1667 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1668 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1671 // Bitcast to integer nodes.
1672 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1673 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1676 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1677 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1678 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1679 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1681 if (WidthX > WidthY)
1682 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1683 else if (WidthY > WidthX)
1684 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1686 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1687 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1688 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1691 // (d)sll SllX, X, 1
1692 // (d)srl SrlX, SllX, 1
1693 // (d)srl SrlY, Y, width(Y)-1
1694 // (d)sll SllY, SrlX, width(Y)-1
1695 // or Or, SrlX, SllY
1696 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1697 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1698 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1699 DAG.getConstant(WidthY - 1, MVT::i32));
1701 if (WidthX > WidthY)
1702 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1703 else if (WidthY > WidthX)
1704 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1706 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1707 DAG.getConstant(WidthX - 1, MVT::i32));
1708 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1709 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1713 MipsTargetLowering::lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1714 if (Subtarget->hasMips64())
1715 return lowerFCOPYSIGN64(Op, DAG, Subtarget->hasMips32r2());
1717 return lowerFCOPYSIGN32(Op, DAG, Subtarget->hasMips32r2());
1720 static SDValue lowerFABS32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1721 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1724 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1726 SDValue X = (Op.getValueType() == MVT::f32) ?
1727 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1728 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1733 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32,
1734 DAG.getRegister(Mips::ZERO, MVT::i32),
1735 DAG.getConstant(31, MVT::i32), Const1, X);
1737 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1738 Res = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1741 if (Op.getValueType() == MVT::f32)
1742 return DAG.getNode(ISD::BITCAST, DL, MVT::f32, Res);
1744 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1745 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1746 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1749 static SDValue lowerFABS64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1750 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1753 // Bitcast to integer node.
1754 SDValue X = DAG.getNode(ISD::BITCAST, DL, MVT::i64, Op.getOperand(0));
1758 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i64,
1759 DAG.getRegister(Mips::ZERO_64, MVT::i64),
1760 DAG.getConstant(63, MVT::i32), Const1, X);
1762 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i64, X, Const1);
1763 Res = DAG.getNode(ISD::SRL, DL, MVT::i64, SllX, Const1);
1766 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, Res);
1770 MipsTargetLowering::lowerFABS(SDValue Op, SelectionDAG &DAG) const {
1771 if (Subtarget->hasMips64() && (Op.getValueType() == MVT::f64))
1772 return lowerFABS64(Op, DAG, Subtarget->hasMips32r2());
1774 return lowerFABS32(Op, DAG, Subtarget->hasMips32r2());
1777 SDValue MipsTargetLowering::
1778 lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
1780 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1781 "Frame address can only be determined for current frame.");
1783 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1784 MFI->setFrameAddressIsTaken(true);
1785 EVT VT = Op.getValueType();
1787 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), DL,
1788 IsN64 ? Mips::FP_64 : Mips::FP, VT);
1792 SDValue MipsTargetLowering::lowerRETURNADDR(SDValue Op,
1793 SelectionDAG &DAG) const {
1795 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1796 "Return address can be determined only for current frame.");
1798 MachineFunction &MF = DAG.getMachineFunction();
1799 MachineFrameInfo *MFI = MF.getFrameInfo();
1800 MVT VT = Op.getSimpleValueType();
1801 unsigned RA = IsN64 ? Mips::RA_64 : Mips::RA;
1802 MFI->setReturnAddressIsTaken(true);
1804 // Return RA, which contains the return address. Mark it an implicit live-in.
1805 unsigned Reg = MF.addLiveIn(RA, getRegClassFor(VT));
1806 return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op), Reg, VT);
1809 // An EH_RETURN is the result of lowering llvm.eh.return which in turn is
1810 // generated from __builtin_eh_return (offset, handler)
1811 // The effect of this is to adjust the stack pointer by "offset"
1812 // and then branch to "handler".
1813 SDValue MipsTargetLowering::lowerEH_RETURN(SDValue Op, SelectionDAG &DAG)
1815 MachineFunction &MF = DAG.getMachineFunction();
1816 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
1818 MipsFI->setCallsEhReturn();
1819 SDValue Chain = Op.getOperand(0);
1820 SDValue Offset = Op.getOperand(1);
1821 SDValue Handler = Op.getOperand(2);
1823 EVT Ty = IsN64 ? MVT::i64 : MVT::i32;
1825 // Store stack offset in V1, store jump target in V0. Glue CopyToReg and
1826 // EH_RETURN nodes, so that instructions are emitted back-to-back.
1827 unsigned OffsetReg = IsN64 ? Mips::V1_64 : Mips::V1;
1828 unsigned AddrReg = IsN64 ? Mips::V0_64 : Mips::V0;
1829 Chain = DAG.getCopyToReg(Chain, DL, OffsetReg, Offset, SDValue());
1830 Chain = DAG.getCopyToReg(Chain, DL, AddrReg, Handler, Chain.getValue(1));
1831 return DAG.getNode(MipsISD::EH_RETURN, DL, MVT::Other, Chain,
1832 DAG.getRegister(OffsetReg, Ty),
1833 DAG.getRegister(AddrReg, getPointerTy()),
1837 SDValue MipsTargetLowering::lowerATOMIC_FENCE(SDValue Op,
1838 SelectionDAG &DAG) const {
1839 // FIXME: Need pseudo-fence for 'singlethread' fences
1840 // FIXME: Set SType for weaker fences where supported/appropriate.
1843 return DAG.getNode(MipsISD::Sync, DL, MVT::Other, Op.getOperand(0),
1844 DAG.getConstant(SType, MVT::i32));
1847 SDValue MipsTargetLowering::lowerShiftLeftParts(SDValue Op,
1848 SelectionDAG &DAG) const {
1850 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1851 SDValue Shamt = Op.getOperand(2);
1854 // lo = (shl lo, shamt)
1855 // hi = (or (shl hi, shamt) (srl (srl lo, 1), ~shamt))
1858 // hi = (shl lo, shamt[4:0])
1859 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1860 DAG.getConstant(-1, MVT::i32));
1861 SDValue ShiftRight1Lo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo,
1862 DAG.getConstant(1, MVT::i32));
1863 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, ShiftRight1Lo,
1865 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi, Shamt);
1866 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1867 SDValue ShiftLeftLo = DAG.getNode(ISD::SHL, DL, MVT::i32, Lo, Shamt);
1868 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1869 DAG.getConstant(0x20, MVT::i32));
1870 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1871 DAG.getConstant(0, MVT::i32), ShiftLeftLo);
1872 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftLeftLo, Or);
1874 SDValue Ops[2] = {Lo, Hi};
1875 return DAG.getMergeValues(Ops, 2, DL);
1878 SDValue MipsTargetLowering::lowerShiftRightParts(SDValue Op, SelectionDAG &DAG,
1881 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1882 SDValue Shamt = Op.getOperand(2);
1885 // lo = (or (shl (shl hi, 1), ~shamt) (srl lo, shamt))
1887 // hi = (sra hi, shamt)
1889 // hi = (srl hi, shamt)
1892 // lo = (sra hi, shamt[4:0])
1893 // hi = (sra hi, 31)
1895 // lo = (srl hi, shamt[4:0])
1897 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1898 DAG.getConstant(-1, MVT::i32));
1899 SDValue ShiftLeft1Hi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi,
1900 DAG.getConstant(1, MVT::i32));
1901 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, ShiftLeft1Hi, Not);
1902 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo, Shamt);
1903 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1904 SDValue ShiftRightHi = DAG.getNode(IsSRA ? ISD::SRA : ISD::SRL, DL, MVT::i32,
1906 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1907 DAG.getConstant(0x20, MVT::i32));
1908 SDValue Shift31 = DAG.getNode(ISD::SRA, DL, MVT::i32, Hi,
1909 DAG.getConstant(31, MVT::i32));
1910 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftRightHi, Or);
1911 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1912 IsSRA ? Shift31 : DAG.getConstant(0, MVT::i32),
1915 SDValue Ops[2] = {Lo, Hi};
1916 return DAG.getMergeValues(Ops, 2, DL);
1919 static SDValue createLoadLR(unsigned Opc, SelectionDAG &DAG, LoadSDNode *LD,
1920 SDValue Chain, SDValue Src, unsigned Offset) {
1921 SDValue Ptr = LD->getBasePtr();
1922 EVT VT = LD->getValueType(0), MemVT = LD->getMemoryVT();
1923 EVT BasePtrVT = Ptr.getValueType();
1925 SDVTList VTList = DAG.getVTList(VT, MVT::Other);
1928 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
1929 DAG.getConstant(Offset, BasePtrVT));
1931 SDValue Ops[] = { Chain, Ptr, Src };
1932 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, 3, MemVT,
1933 LD->getMemOperand());
1936 // Expand an unaligned 32 or 64-bit integer load node.
1937 SDValue MipsTargetLowering::lowerLOAD(SDValue Op, SelectionDAG &DAG) const {
1938 LoadSDNode *LD = cast<LoadSDNode>(Op);
1939 EVT MemVT = LD->getMemoryVT();
1941 // Return if load is aligned or if MemVT is neither i32 nor i64.
1942 if ((LD->getAlignment() >= MemVT.getSizeInBits() / 8) ||
1943 ((MemVT != MVT::i32) && (MemVT != MVT::i64)))
1946 bool IsLittle = Subtarget->isLittle();
1947 EVT VT = Op.getValueType();
1948 ISD::LoadExtType ExtType = LD->getExtensionType();
1949 SDValue Chain = LD->getChain(), Undef = DAG.getUNDEF(VT);
1951 assert((VT == MVT::i32) || (VT == MVT::i64));
1954 // (set dst, (i64 (load baseptr)))
1956 // (set tmp, (ldl (add baseptr, 7), undef))
1957 // (set dst, (ldr baseptr, tmp))
1958 if ((VT == MVT::i64) && (ExtType == ISD::NON_EXTLOAD)) {
1959 SDValue LDL = createLoadLR(MipsISD::LDL, DAG, LD, Chain, Undef,
1961 return createLoadLR(MipsISD::LDR, DAG, LD, LDL.getValue(1), LDL,
1965 SDValue LWL = createLoadLR(MipsISD::LWL, DAG, LD, Chain, Undef,
1967 SDValue LWR = createLoadLR(MipsISD::LWR, DAG, LD, LWL.getValue(1), LWL,
1971 // (set dst, (i32 (load baseptr))) or
1972 // (set dst, (i64 (sextload baseptr))) or
1973 // (set dst, (i64 (extload baseptr)))
1975 // (set tmp, (lwl (add baseptr, 3), undef))
1976 // (set dst, (lwr baseptr, tmp))
1977 if ((VT == MVT::i32) || (ExtType == ISD::SEXTLOAD) ||
1978 (ExtType == ISD::EXTLOAD))
1981 assert((VT == MVT::i64) && (ExtType == ISD::ZEXTLOAD));
1984 // (set dst, (i64 (zextload baseptr)))
1986 // (set tmp0, (lwl (add baseptr, 3), undef))
1987 // (set tmp1, (lwr baseptr, tmp0))
1988 // (set tmp2, (shl tmp1, 32))
1989 // (set dst, (srl tmp2, 32))
1991 SDValue Const32 = DAG.getConstant(32, MVT::i32);
1992 SDValue SLL = DAG.getNode(ISD::SHL, DL, MVT::i64, LWR, Const32);
1993 SDValue SRL = DAG.getNode(ISD::SRL, DL, MVT::i64, SLL, Const32);
1994 SDValue Ops[] = { SRL, LWR.getValue(1) };
1995 return DAG.getMergeValues(Ops, 2, DL);
1998 static SDValue createStoreLR(unsigned Opc, SelectionDAG &DAG, StoreSDNode *SD,
1999 SDValue Chain, unsigned Offset) {
2000 SDValue Ptr = SD->getBasePtr(), Value = SD->getValue();
2001 EVT MemVT = SD->getMemoryVT(), BasePtrVT = Ptr.getValueType();
2003 SDVTList VTList = DAG.getVTList(MVT::Other);
2006 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2007 DAG.getConstant(Offset, BasePtrVT));
2009 SDValue Ops[] = { Chain, Value, Ptr };
2010 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, 3, MemVT,
2011 SD->getMemOperand());
2014 // Expand an unaligned 32 or 64-bit integer store node.
2015 static SDValue lowerUnalignedIntStore(StoreSDNode *SD, SelectionDAG &DAG,
2017 SDValue Value = SD->getValue(), Chain = SD->getChain();
2018 EVT VT = Value.getValueType();
2021 // (store val, baseptr) or
2022 // (truncstore val, baseptr)
2024 // (swl val, (add baseptr, 3))
2025 // (swr val, baseptr)
2026 if ((VT == MVT::i32) || SD->isTruncatingStore()) {
2027 SDValue SWL = createStoreLR(MipsISD::SWL, DAG, SD, Chain,
2029 return createStoreLR(MipsISD::SWR, DAG, SD, SWL, IsLittle ? 0 : 3);
2032 assert(VT == MVT::i64);
2035 // (store val, baseptr)
2037 // (sdl val, (add baseptr, 7))
2038 // (sdr val, baseptr)
2039 SDValue SDL = createStoreLR(MipsISD::SDL, DAG, SD, Chain, IsLittle ? 7 : 0);
2040 return createStoreLR(MipsISD::SDR, DAG, SD, SDL, IsLittle ? 0 : 7);
2043 // Lower (store (fp_to_sint $fp) $ptr) to (store (TruncIntFP $fp), $ptr).
2044 static SDValue lowerFP_TO_SINT_STORE(StoreSDNode *SD, SelectionDAG &DAG) {
2045 SDValue Val = SD->getValue();
2047 if (Val.getOpcode() != ISD::FP_TO_SINT)
2050 EVT FPTy = EVT::getFloatingPointVT(Val.getValueSizeInBits());
2051 SDValue Tr = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Val), FPTy,
2054 return DAG.getStore(SD->getChain(), SDLoc(SD), Tr, SD->getBasePtr(),
2055 SD->getPointerInfo(), SD->isVolatile(),
2056 SD->isNonTemporal(), SD->getAlignment());
2059 SDValue MipsTargetLowering::lowerSTORE(SDValue Op, SelectionDAG &DAG) const {
2060 StoreSDNode *SD = cast<StoreSDNode>(Op);
2061 EVT MemVT = SD->getMemoryVT();
2063 // Lower unaligned integer stores.
2064 if ((SD->getAlignment() < MemVT.getSizeInBits() / 8) &&
2065 ((MemVT == MVT::i32) || (MemVT == MVT::i64)))
2066 return lowerUnalignedIntStore(SD, DAG, Subtarget->isLittle());
2068 return lowerFP_TO_SINT_STORE(SD, DAG);
2071 SDValue MipsTargetLowering::lowerADD(SDValue Op, SelectionDAG &DAG) const {
2072 if (Op->getOperand(0).getOpcode() != ISD::FRAMEADDR
2073 || cast<ConstantSDNode>
2074 (Op->getOperand(0).getOperand(0))->getZExtValue() != 0
2075 || Op->getOperand(1).getOpcode() != ISD::FRAME_TO_ARGS_OFFSET)
2079 // (add (frameaddr 0), (frame_to_args_offset))
2080 // results from lowering llvm.eh.dwarf.cfa intrinsic. Transform it to
2081 // (add FrameObject, 0)
2082 // where FrameObject is a fixed StackObject with offset 0 which points to
2083 // the old stack pointer.
2084 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2085 EVT ValTy = Op->getValueType(0);
2086 int FI = MFI->CreateFixedObject(Op.getValueSizeInBits() / 8, 0, false);
2087 SDValue InArgsAddr = DAG.getFrameIndex(FI, ValTy);
2088 return DAG.getNode(ISD::ADD, SDLoc(Op), ValTy, InArgsAddr,
2089 DAG.getConstant(0, ValTy));
2092 SDValue MipsTargetLowering::lowerFP_TO_SINT(SDValue Op,
2093 SelectionDAG &DAG) const {
2094 EVT FPTy = EVT::getFloatingPointVT(Op.getValueSizeInBits());
2095 SDValue Trunc = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Op), FPTy,
2097 return DAG.getNode(ISD::BITCAST, SDLoc(Op), Op.getValueType(), Trunc);
2100 //===----------------------------------------------------------------------===//
2101 // Calling Convention Implementation
2102 //===----------------------------------------------------------------------===//
2104 //===----------------------------------------------------------------------===//
2105 // TODO: Implement a generic logic using tblgen that can support this.
2106 // Mips O32 ABI rules:
2108 // i32 - Passed in A0, A1, A2, A3 and stack
2109 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
2110 // an argument. Otherwise, passed in A1, A2, A3 and stack.
2111 // f64 - Only passed in two aliased f32 registers if no int reg has been used
2112 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
2113 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
2116 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
2117 //===----------------------------------------------------------------------===//
2119 static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
2120 MVT LocVT, CCValAssign::LocInfo LocInfo,
2121 ISD::ArgFlagsTy ArgFlags, CCState &State,
2122 const uint16_t *F64Regs) {
2124 static const unsigned IntRegsSize=4, FloatRegsSize=2;
2126 static const uint16_t IntRegs[] = {
2127 Mips::A0, Mips::A1, Mips::A2, Mips::A3
2129 static const uint16_t F32Regs[] = {
2130 Mips::F12, Mips::F14
2133 // Do not process byval args here.
2134 if (ArgFlags.isByVal())
2137 // Promote i8 and i16
2138 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2140 if (ArgFlags.isSExt())
2141 LocInfo = CCValAssign::SExt;
2142 else if (ArgFlags.isZExt())
2143 LocInfo = CCValAssign::ZExt;
2145 LocInfo = CCValAssign::AExt;
2150 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2151 // is true: function is vararg, argument is 3rd or higher, there is previous
2152 // argument which is not f32 or f64.
2153 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2154 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2155 unsigned OrigAlign = ArgFlags.getOrigAlign();
2156 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2158 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2159 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2160 // If this is the first part of an i64 arg,
2161 // the allocated register must be either A0 or A2.
2162 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2163 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2165 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2166 // Allocate int register and shadow next int register. If first
2167 // available register is Mips::A1 or Mips::A3, shadow it too.
2168 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2169 if (Reg == Mips::A1 || Reg == Mips::A3)
2170 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2171 State.AllocateReg(IntRegs, IntRegsSize);
2173 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2174 // we are guaranteed to find an available float register
2175 if (ValVT == MVT::f32) {
2176 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2177 // Shadow int register
2178 State.AllocateReg(IntRegs, IntRegsSize);
2180 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2181 // Shadow int registers
2182 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2183 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2184 State.AllocateReg(IntRegs, IntRegsSize);
2185 State.AllocateReg(IntRegs, IntRegsSize);
2188 llvm_unreachable("Cannot handle this ValVT.");
2191 unsigned Offset = State.AllocateStack(ValVT.getSizeInBits() >> 3,
2193 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2195 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2200 static bool CC_MipsO32_FP32(unsigned ValNo, MVT ValVT,
2201 MVT LocVT, CCValAssign::LocInfo LocInfo,
2202 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2203 static const uint16_t F64Regs[] = { Mips::D6, Mips::D7 };
2205 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2208 static bool CC_MipsO32_FP64(unsigned ValNo, MVT ValVT,
2209 MVT LocVT, CCValAssign::LocInfo LocInfo,
2210 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2211 static const uint16_t F64Regs[] = { Mips::D12_64, Mips::D12_64 };
2213 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2216 #include "MipsGenCallingConv.inc"
2218 //===----------------------------------------------------------------------===//
2219 // Call Calling Convention Implementation
2220 //===----------------------------------------------------------------------===//
2222 // Return next O32 integer argument register.
2223 static unsigned getNextIntArgReg(unsigned Reg) {
2224 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2225 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2229 MipsTargetLowering::passArgOnStack(SDValue StackPtr, unsigned Offset,
2230 SDValue Chain, SDValue Arg, SDLoc DL,
2231 bool IsTailCall, SelectionDAG &DAG) const {
2233 SDValue PtrOff = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr,
2234 DAG.getIntPtrConstant(Offset));
2235 return DAG.getStore(Chain, DL, Arg, PtrOff, MachinePointerInfo(), false,
2239 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2240 int FI = MFI->CreateFixedObject(Arg.getValueSizeInBits() / 8, Offset, false);
2241 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2242 return DAG.getStore(Chain, DL, Arg, FIN, MachinePointerInfo(),
2243 /*isVolatile=*/ true, false, 0);
2246 void MipsTargetLowering::
2247 getOpndList(SmallVectorImpl<SDValue> &Ops,
2248 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
2249 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
2250 CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const {
2251 // Insert node "GP copy globalreg" before call to function.
2253 // R_MIPS_CALL* operators (emitted when non-internal functions are called
2254 // in PIC mode) allow symbols to be resolved via lazy binding.
2255 // The lazy binding stub requires GP to point to the GOT.
2256 if (IsPICCall && !InternalLinkage) {
2257 unsigned GPReg = IsN64 ? Mips::GP_64 : Mips::GP;
2258 EVT Ty = IsN64 ? MVT::i64 : MVT::i32;
2259 RegsToPass.push_back(std::make_pair(GPReg, getGlobalReg(CLI.DAG, Ty)));
2262 // Build a sequence of copy-to-reg nodes chained together with token
2263 // chain and flag operands which copy the outgoing args into registers.
2264 // The InFlag in necessary since all emitted instructions must be
2268 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2269 Chain = CLI.DAG.getCopyToReg(Chain, CLI.DL, RegsToPass[i].first,
2270 RegsToPass[i].second, InFlag);
2271 InFlag = Chain.getValue(1);
2274 // Add argument registers to the end of the list so that they are
2275 // known live into the call.
2276 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2277 Ops.push_back(CLI.DAG.getRegister(RegsToPass[i].first,
2278 RegsToPass[i].second.getValueType()));
2280 // Add a register mask operand representing the call-preserved registers.
2281 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2282 const uint32_t *Mask = TRI->getCallPreservedMask(CLI.CallConv);
2283 assert(Mask && "Missing call preserved mask for calling convention");
2284 if (Subtarget->inMips16HardFloat()) {
2285 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(CLI.Callee)) {
2286 llvm::StringRef Sym = G->getGlobal()->getName();
2287 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
2288 if (F->hasFnAttribute("__Mips16RetHelper")) {
2289 Mask = MipsRegisterInfo::getMips16RetHelperMask();
2293 Ops.push_back(CLI.DAG.getRegisterMask(Mask));
2295 if (InFlag.getNode())
2296 Ops.push_back(InFlag);
2299 /// LowerCall - functions arguments are copied from virtual regs to
2300 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2302 MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2303 SmallVectorImpl<SDValue> &InVals) const {
2304 SelectionDAG &DAG = CLI.DAG;
2306 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
2307 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
2308 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
2309 SDValue Chain = CLI.Chain;
2310 SDValue Callee = CLI.Callee;
2311 bool &IsTailCall = CLI.IsTailCall;
2312 CallingConv::ID CallConv = CLI.CallConv;
2313 bool IsVarArg = CLI.IsVarArg;
2315 MachineFunction &MF = DAG.getMachineFunction();
2316 MachineFrameInfo *MFI = MF.getFrameInfo();
2317 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2318 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
2319 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2321 // Analyze operands of the call, assigning locations to each operand.
2322 SmallVector<CCValAssign, 16> ArgLocs;
2323 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2324 getTargetMachine(), ArgLocs, *DAG.getContext());
2325 MipsCC::SpecialCallingConvType SpecialCallingConv =
2326 getSpecialCallingConv(Callee);
2327 MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo,
2328 SpecialCallingConv);
2330 MipsCCInfo.analyzeCallOperands(Outs, IsVarArg,
2331 Subtarget->mipsSEUsesSoftFloat(),
2332 Callee.getNode(), CLI.Args);
2334 // Get a count of how many bytes are to be pushed on the stack.
2335 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2337 // Check if it's really possible to do a tail call.
2340 isEligibleForTailCallOptimization(MipsCCInfo, NextStackOffset,
2341 *MF.getInfo<MipsFunctionInfo>());
2346 // Chain is the output chain of the last Load/Store or CopyToReg node.
2347 // ByValChain is the output chain of the last Memcpy node created for copying
2348 // byval arguments to the stack.
2349 unsigned StackAlignment = TFL->getStackAlignment();
2350 NextStackOffset = RoundUpToAlignment(NextStackOffset, StackAlignment);
2351 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2354 Chain = DAG.getCALLSEQ_START(Chain, NextStackOffsetVal, DL);
2356 SDValue StackPtr = DAG.getCopyFromReg(Chain, DL,
2357 IsN64 ? Mips::SP_64 : Mips::SP,
2360 // With EABI is it possible to have 16 args on registers.
2361 std::deque< std::pair<unsigned, SDValue> > RegsToPass;
2362 SmallVector<SDValue, 8> MemOpChains;
2363 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2365 // Walk the register/memloc assignments, inserting copies/loads.
2366 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2367 SDValue Arg = OutVals[i];
2368 CCValAssign &VA = ArgLocs[i];
2369 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2370 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2373 if (Flags.isByVal()) {
2374 assert(Flags.getByValSize() &&
2375 "ByVal args of size 0 should have been ignored by front-end.");
2376 assert(ByValArg != MipsCCInfo.byval_end());
2377 assert(!IsTailCall &&
2378 "Do not tail-call optimize if there is a byval argument.");
2379 passByValArg(Chain, DL, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg,
2380 MipsCCInfo, *ByValArg, Flags, Subtarget->isLittle());
2385 // Promote the value if needed.
2386 switch (VA.getLocInfo()) {
2387 default: llvm_unreachable("Unknown loc info!");
2388 case CCValAssign::Full:
2389 if (VA.isRegLoc()) {
2390 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2391 (ValVT == MVT::f64 && LocVT == MVT::i64) ||
2392 (ValVT == MVT::i64 && LocVT == MVT::f64))
2393 Arg = DAG.getNode(ISD::BITCAST, DL, LocVT, Arg);
2394 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2395 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2396 Arg, DAG.getConstant(0, MVT::i32));
2397 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2398 Arg, DAG.getConstant(1, MVT::i32));
2399 if (!Subtarget->isLittle())
2401 unsigned LocRegLo = VA.getLocReg();
2402 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2403 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2404 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2409 case CCValAssign::SExt:
2410 Arg = DAG.getNode(ISD::SIGN_EXTEND, DL, LocVT, Arg);
2412 case CCValAssign::ZExt:
2413 Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, LocVT, Arg);
2415 case CCValAssign::AExt:
2416 Arg = DAG.getNode(ISD::ANY_EXTEND, DL, LocVT, Arg);
2420 // Arguments that can be passed on register must be kept at
2421 // RegsToPass vector
2422 if (VA.isRegLoc()) {
2423 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2427 // Register can't get to this point...
2428 assert(VA.isMemLoc());
2430 // emit ISD::STORE whichs stores the
2431 // parameter value to a stack Location
2432 MemOpChains.push_back(passArgOnStack(StackPtr, VA.getLocMemOffset(),
2433 Chain, Arg, DL, IsTailCall, DAG));
2436 // Transform all store nodes into one single node because all store
2437 // nodes are independent of each other.
2438 if (!MemOpChains.empty())
2439 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
2440 &MemOpChains[0], MemOpChains.size());
2442 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2443 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2444 // node so that legalize doesn't hack it.
2445 bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
2446 bool GlobalOrExternal = false, InternalLinkage = false;
2448 EVT Ty = Callee.getValueType();
2450 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2452 const GlobalValue *Val = G->getGlobal();
2453 InternalLinkage = Val->hasInternalLinkage();
2455 if (InternalLinkage)
2456 Callee = getAddrLocal(G, Ty, DAG, HasMips64);
2458 Callee = getAddrGlobalLargeGOT(G, Ty, DAG, MipsII::MO_CALL_HI16,
2459 MipsII::MO_CALL_LO16, Chain,
2460 FuncInfo->callPtrInfo(Val));
2462 Callee = getAddrGlobal(G, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2463 FuncInfo->callPtrInfo(Val));
2465 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), DL, getPointerTy(), 0,
2466 MipsII::MO_NO_FLAG);
2467 GlobalOrExternal = true;
2469 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2470 const char *Sym = S->getSymbol();
2472 if (!IsN64 && !IsPIC) // !N64 && static
2473 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(),
2474 MipsII::MO_NO_FLAG);
2476 Callee = getAddrGlobalLargeGOT(S, Ty, DAG, MipsII::MO_CALL_HI16,
2477 MipsII::MO_CALL_LO16, Chain,
2478 FuncInfo->callPtrInfo(Sym));
2480 Callee = getAddrGlobal(S, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2481 FuncInfo->callPtrInfo(Sym));
2483 GlobalOrExternal = true;
2486 SmallVector<SDValue, 8> Ops(1, Chain);
2487 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2489 getOpndList(Ops, RegsToPass, IsPICCall, GlobalOrExternal, InternalLinkage,
2490 CLI, Callee, Chain);
2493 return DAG.getNode(MipsISD::TailCall, DL, MVT::Other, &Ops[0], Ops.size());
2495 Chain = DAG.getNode(MipsISD::JmpLink, DL, NodeTys, &Ops[0], Ops.size());
2496 SDValue InFlag = Chain.getValue(1);
2498 // Create the CALLSEQ_END node.
2499 Chain = DAG.getCALLSEQ_END(Chain, NextStackOffsetVal,
2500 DAG.getIntPtrConstant(0, true), InFlag, DL);
2501 InFlag = Chain.getValue(1);
2503 // Handle result values, copying them out of physregs into vregs that we
2505 return LowerCallResult(Chain, InFlag, CallConv, IsVarArg,
2506 Ins, DL, DAG, InVals, CLI.Callee.getNode(), CLI.RetTy);
2509 /// LowerCallResult - Lower the result values of a call into the
2510 /// appropriate copies out of appropriate physical registers.
2512 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2513 CallingConv::ID CallConv, bool IsVarArg,
2514 const SmallVectorImpl<ISD::InputArg> &Ins,
2515 SDLoc DL, SelectionDAG &DAG,
2516 SmallVectorImpl<SDValue> &InVals,
2517 const SDNode *CallNode,
2518 const Type *RetTy) const {
2519 // Assign locations to each value returned by this call.
2520 SmallVector<CCValAssign, 16> RVLocs;
2521 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2522 getTargetMachine(), RVLocs, *DAG.getContext());
2523 MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
2525 MipsCCInfo.analyzeCallResult(Ins, Subtarget->mipsSEUsesSoftFloat(),
2528 // Copy all of the result registers out of their specified physreg.
2529 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2530 SDValue Val = DAG.getCopyFromReg(Chain, DL, RVLocs[i].getLocReg(),
2531 RVLocs[i].getLocVT(), InFlag);
2532 Chain = Val.getValue(1);
2533 InFlag = Val.getValue(2);
2535 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2536 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getValVT(), Val);
2538 InVals.push_back(Val);
2544 //===----------------------------------------------------------------------===//
2545 // Formal Arguments Calling Convention Implementation
2546 //===----------------------------------------------------------------------===//
2547 /// LowerFormalArguments - transform physical registers into virtual registers
2548 /// and generate load operations for arguments places on the stack.
2550 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
2551 CallingConv::ID CallConv,
2553 const SmallVectorImpl<ISD::InputArg> &Ins,
2554 SDLoc DL, SelectionDAG &DAG,
2555 SmallVectorImpl<SDValue> &InVals)
2557 MachineFunction &MF = DAG.getMachineFunction();
2558 MachineFrameInfo *MFI = MF.getFrameInfo();
2559 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2561 MipsFI->setVarArgsFrameIndex(0);
2563 // Used with vargs to acumulate store chains.
2564 std::vector<SDValue> OutChains;
2566 // Assign locations to all of the incoming arguments.
2567 SmallVector<CCValAssign, 16> ArgLocs;
2568 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2569 getTargetMachine(), ArgLocs, *DAG.getContext());
2570 MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
2571 Function::const_arg_iterator FuncArg =
2572 DAG.getMachineFunction().getFunction()->arg_begin();
2573 bool UseSoftFloat = Subtarget->mipsSEUsesSoftFloat();
2575 MipsCCInfo.analyzeFormalArguments(Ins, UseSoftFloat, FuncArg);
2576 MipsFI->setFormalArgInfo(CCInfo.getNextStackOffset(),
2577 MipsCCInfo.hasByValArg());
2579 unsigned CurArgIdx = 0;
2580 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2582 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2583 CCValAssign &VA = ArgLocs[i];
2584 std::advance(FuncArg, Ins[i].OrigArgIndex - CurArgIdx);
2585 CurArgIdx = Ins[i].OrigArgIndex;
2586 EVT ValVT = VA.getValVT();
2587 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2588 bool IsRegLoc = VA.isRegLoc();
2590 if (Flags.isByVal()) {
2591 assert(Flags.getByValSize() &&
2592 "ByVal args of size 0 should have been ignored by front-end.");
2593 assert(ByValArg != MipsCCInfo.byval_end());
2594 copyByValRegs(Chain, DL, OutChains, DAG, Flags, InVals, &*FuncArg,
2595 MipsCCInfo, *ByValArg);
2600 // Arguments stored on registers
2602 EVT RegVT = VA.getLocVT();
2603 unsigned ArgReg = VA.getLocReg();
2604 const TargetRegisterClass *RC;
2606 if (RegVT == MVT::i32)
2607 RC = Subtarget->inMips16Mode()? &Mips::CPU16RegsRegClass :
2608 &Mips::GPR32RegClass;
2609 else if (RegVT == MVT::i64)
2610 RC = &Mips::GPR64RegClass;
2611 else if (RegVT == MVT::f32)
2612 RC = &Mips::FGR32RegClass;
2613 else if (RegVT == MVT::f64)
2614 RC = Subtarget->isFP64bit() ? &Mips::FGR64RegClass :
2615 &Mips::AFGR64RegClass;
2617 llvm_unreachable("RegVT not supported by FormalArguments Lowering");
2619 // Transform the arguments stored on
2620 // physical registers into virtual ones
2621 unsigned Reg = addLiveIn(DAG.getMachineFunction(), ArgReg, RC);
2622 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegVT);
2624 // If this is an 8 or 16-bit value, it has been passed promoted
2625 // to 32 bits. Insert an assert[sz]ext to capture this, then
2626 // truncate to the right size.
2627 if (VA.getLocInfo() != CCValAssign::Full) {
2628 unsigned Opcode = 0;
2629 if (VA.getLocInfo() == CCValAssign::SExt)
2630 Opcode = ISD::AssertSext;
2631 else if (VA.getLocInfo() == CCValAssign::ZExt)
2632 Opcode = ISD::AssertZext;
2634 ArgValue = DAG.getNode(Opcode, DL, RegVT, ArgValue,
2635 DAG.getValueType(ValVT));
2636 ArgValue = DAG.getNode(ISD::TRUNCATE, DL, ValVT, ArgValue);
2639 // Handle floating point arguments passed in integer registers and
2640 // long double arguments passed in floating point registers.
2641 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
2642 (RegVT == MVT::i64 && ValVT == MVT::f64) ||
2643 (RegVT == MVT::f64 && ValVT == MVT::i64))
2644 ArgValue = DAG.getNode(ISD::BITCAST, DL, ValVT, ArgValue);
2645 else if (IsO32 && RegVT == MVT::i32 && ValVT == MVT::f64) {
2646 unsigned Reg2 = addLiveIn(DAG.getMachineFunction(),
2647 getNextIntArgReg(ArgReg), RC);
2648 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, DL, Reg2, RegVT);
2649 if (!Subtarget->isLittle())
2650 std::swap(ArgValue, ArgValue2);
2651 ArgValue = DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64,
2652 ArgValue, ArgValue2);
2655 InVals.push_back(ArgValue);
2656 } else { // VA.isRegLoc()
2659 assert(VA.isMemLoc());
2661 // The stack pointer offset is relative to the caller stack frame.
2662 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2663 VA.getLocMemOffset(), true);
2665 // Create load nodes to retrieve arguments from the stack
2666 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2667 InVals.push_back(DAG.getLoad(ValVT, DL, Chain, FIN,
2668 MachinePointerInfo::getFixedStack(FI),
2669 false, false, false, 0));
2673 // The mips ABIs for returning structs by value requires that we copy
2674 // the sret argument into $v0 for the return. Save the argument into
2675 // a virtual register so that we can access it from the return points.
2676 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
2677 unsigned Reg = MipsFI->getSRetReturnReg();
2679 Reg = MF.getRegInfo().
2680 createVirtualRegister(getRegClassFor(IsN64 ? MVT::i64 : MVT::i32));
2681 MipsFI->setSRetReturnReg(Reg);
2683 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), DL, Reg, InVals[0]);
2684 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Copy, Chain);
2688 writeVarArgRegs(OutChains, MipsCCInfo, Chain, DL, DAG);
2690 // All stores are grouped in one node to allow the matching between
2691 // the size of Ins and InVals. This only happens when on varg functions
2692 if (!OutChains.empty()) {
2693 OutChains.push_back(Chain);
2694 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
2695 &OutChains[0], OutChains.size());
2701 //===----------------------------------------------------------------------===//
2702 // Return Value Calling Convention Implementation
2703 //===----------------------------------------------------------------------===//
2706 MipsTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
2707 MachineFunction &MF, bool IsVarArg,
2708 const SmallVectorImpl<ISD::OutputArg> &Outs,
2709 LLVMContext &Context) const {
2710 SmallVector<CCValAssign, 16> RVLocs;
2711 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(),
2713 return CCInfo.CheckReturn(Outs, RetCC_Mips);
2717 MipsTargetLowering::LowerReturn(SDValue Chain,
2718 CallingConv::ID CallConv, bool IsVarArg,
2719 const SmallVectorImpl<ISD::OutputArg> &Outs,
2720 const SmallVectorImpl<SDValue> &OutVals,
2721 SDLoc DL, SelectionDAG &DAG) const {
2722 // CCValAssign - represent the assignment of
2723 // the return value to a location
2724 SmallVector<CCValAssign, 16> RVLocs;
2725 MachineFunction &MF = DAG.getMachineFunction();
2727 // CCState - Info about the registers and stack slot.
2728 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(), RVLocs,
2730 MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
2732 // Analyze return values.
2733 MipsCCInfo.analyzeReturn(Outs, Subtarget->mipsSEUsesSoftFloat(),
2734 MF.getFunction()->getReturnType());
2737 SmallVector<SDValue, 4> RetOps(1, Chain);
2739 // Copy the result values into the output registers.
2740 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2741 SDValue Val = OutVals[i];
2742 CCValAssign &VA = RVLocs[i];
2743 assert(VA.isRegLoc() && "Can only return in registers!");
2745 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2746 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getLocVT(), Val);
2748 Chain = DAG.getCopyToReg(Chain, DL, VA.getLocReg(), Val, Flag);
2750 // Guarantee that all emitted copies are stuck together with flags.
2751 Flag = Chain.getValue(1);
2752 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2755 // The mips ABIs for returning structs by value requires that we copy
2756 // the sret argument into $v0 for the return. We saved the argument into
2757 // a virtual register in the entry block, so now we copy the value out
2759 if (MF.getFunction()->hasStructRetAttr()) {
2760 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2761 unsigned Reg = MipsFI->getSRetReturnReg();
2764 llvm_unreachable("sret virtual register not created in the entry block");
2765 SDValue Val = DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
2766 unsigned V0 = IsN64 ? Mips::V0_64 : Mips::V0;
2768 Chain = DAG.getCopyToReg(Chain, DL, V0, Val, Flag);
2769 Flag = Chain.getValue(1);
2770 RetOps.push_back(DAG.getRegister(V0, getPointerTy()));
2773 RetOps[0] = Chain; // Update chain.
2775 // Add the flag if we have it.
2777 RetOps.push_back(Flag);
2779 // Return on Mips is always a "jr $ra"
2780 return DAG.getNode(MipsISD::Ret, DL, MVT::Other, &RetOps[0], RetOps.size());
2783 //===----------------------------------------------------------------------===//
2784 // Mips Inline Assembly Support
2785 //===----------------------------------------------------------------------===//
2787 /// getConstraintType - Given a constraint letter, return the type of
2788 /// constraint it is for this target.
2789 MipsTargetLowering::ConstraintType MipsTargetLowering::
2790 getConstraintType(const std::string &Constraint) const
2792 // Mips specific constrainy
2793 // GCC config/mips/constraints.md
2795 // 'd' : An address register. Equivalent to r
2796 // unless generating MIPS16 code.
2797 // 'y' : Equivalent to r; retained for
2798 // backwards compatibility.
2799 // 'c' : A register suitable for use in an indirect
2800 // jump. This will always be $25 for -mabicalls.
2801 // 'l' : The lo register. 1 word storage.
2802 // 'x' : The hilo register pair. Double word storage.
2803 if (Constraint.size() == 1) {
2804 switch (Constraint[0]) {
2812 return C_RegisterClass;
2817 return TargetLowering::getConstraintType(Constraint);
2820 /// Examine constraint type and operand type and determine a weight value.
2821 /// This object must already have been set up with the operand type
2822 /// and the current alternative constraint selected.
2823 TargetLowering::ConstraintWeight
2824 MipsTargetLowering::getSingleConstraintMatchWeight(
2825 AsmOperandInfo &info, const char *constraint) const {
2826 ConstraintWeight weight = CW_Invalid;
2827 Value *CallOperandVal = info.CallOperandVal;
2828 // If we don't have a value, we can't do a match,
2829 // but allow it at the lowest weight.
2830 if (CallOperandVal == NULL)
2832 Type *type = CallOperandVal->getType();
2833 // Look at the constraint type.
2834 switch (*constraint) {
2836 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
2840 if (type->isIntegerTy())
2841 weight = CW_Register;
2844 if (type->isFloatTy())
2845 weight = CW_Register;
2847 case 'c': // $25 for indirect jumps
2848 case 'l': // lo register
2849 case 'x': // hilo register pair
2850 if (type->isIntegerTy())
2851 weight = CW_SpecificReg;
2853 case 'I': // signed 16 bit immediate
2854 case 'J': // integer zero
2855 case 'K': // unsigned 16 bit immediate
2856 case 'L': // signed 32 bit immediate where lower 16 bits are 0
2857 case 'N': // immediate in the range of -65535 to -1 (inclusive)
2858 case 'O': // signed 15 bit immediate (+- 16383)
2859 case 'P': // immediate in the range of 65535 to 1 (inclusive)
2860 if (isa<ConstantInt>(CallOperandVal))
2861 weight = CW_Constant;
2870 /// This is a helper function to parse a physical register string and split it
2871 /// into non-numeric and numeric parts (Prefix and Reg). The first boolean flag
2872 /// that is returned indicates whether parsing was successful. The second flag
2873 /// is true if the numeric part exists.
2874 static std::pair<bool, bool>
2875 parsePhysicalReg(const StringRef &C, std::string &Prefix,
2876 unsigned long long &Reg) {
2877 if (C.front() != '{' || C.back() != '}')
2878 return std::make_pair(false, false);
2880 // Search for the first numeric character.
2881 StringRef::const_iterator I, B = C.begin() + 1, E = C.end() - 1;
2882 I = std::find_if(B, E, std::ptr_fun(isdigit));
2884 Prefix.assign(B, I - B);
2886 // The second flag is set to false if no numeric characters were found.
2888 return std::make_pair(true, false);
2890 // Parse the numeric characters.
2891 return std::make_pair(!getAsUnsignedInteger(StringRef(I, E - I), 10, Reg),
2895 std::pair<unsigned, const TargetRegisterClass *> MipsTargetLowering::
2896 parseRegForInlineAsmConstraint(const StringRef &C, MVT VT) const {
2897 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2898 const TargetRegisterClass *RC;
2900 unsigned long long Reg;
2902 std::pair<bool, bool> R = parsePhysicalReg(C, Prefix, Reg);
2905 return std::make_pair((unsigned)0, (const TargetRegisterClass*)0);
2907 if ((Prefix == "hi" || Prefix == "lo")) { // Parse hi/lo.
2908 // No numeric characters follow "hi" or "lo".
2910 return std::make_pair((unsigned)0, (const TargetRegisterClass*)0);
2912 RC = TRI->getRegClass(Prefix == "hi" ?
2913 Mips::HI32RegClassID : Mips::LO32RegClassID);
2914 return std::make_pair(*(RC->begin()), RC);
2918 return std::make_pair((unsigned)0, (const TargetRegisterClass*)0);
2920 if (Prefix == "$f") { // Parse $f0-$f31.
2921 // If the size of FP registers is 64-bit or Reg is an even number, select
2922 // the 64-bit register class. Otherwise, select the 32-bit register class.
2923 if (VT == MVT::Other)
2924 VT = (Subtarget->isFP64bit() || !(Reg % 2)) ? MVT::f64 : MVT::f32;
2926 RC= getRegClassFor(VT);
2928 if (RC == &Mips::AFGR64RegClass) {
2929 assert(Reg % 2 == 0);
2932 } else if (Prefix == "$fcc") { // Parse $fcc0-$fcc7.
2933 RC = TRI->getRegClass(Mips::FCCRegClassID);
2934 } else { // Parse $0-$31.
2935 assert(Prefix == "$");
2936 RC = getRegClassFor((VT == MVT::Other) ? MVT::i32 : VT);
2939 assert(Reg < RC->getNumRegs());
2940 return std::make_pair(*(RC->begin() + Reg), RC);
2943 /// Given a register class constraint, like 'r', if this corresponds directly
2944 /// to an LLVM register class, return a register of 0 and the register class
2946 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
2947 getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const
2949 if (Constraint.size() == 1) {
2950 switch (Constraint[0]) {
2951 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
2952 case 'y': // Same as 'r'. Exists for compatibility.
2954 if (VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
2955 if (Subtarget->inMips16Mode())
2956 return std::make_pair(0U, &Mips::CPU16RegsRegClass);
2957 return std::make_pair(0U, &Mips::GPR32RegClass);
2959 if (VT == MVT::i64 && !HasMips64)
2960 return std::make_pair(0U, &Mips::GPR32RegClass);
2961 if (VT == MVT::i64 && HasMips64)
2962 return std::make_pair(0U, &Mips::GPR64RegClass);
2963 // This will generate an error message
2964 return std::make_pair(0u, static_cast<const TargetRegisterClass*>(0));
2967 return std::make_pair(0U, &Mips::FGR32RegClass);
2968 if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
2969 if (Subtarget->isFP64bit())
2970 return std::make_pair(0U, &Mips::FGR64RegClass);
2971 return std::make_pair(0U, &Mips::AFGR64RegClass);
2974 case 'c': // register suitable for indirect jump
2976 return std::make_pair((unsigned)Mips::T9, &Mips::GPR32RegClass);
2977 assert(VT == MVT::i64 && "Unexpected type.");
2978 return std::make_pair((unsigned)Mips::T9_64, &Mips::GPR64RegClass);
2979 case 'l': // register suitable for indirect jump
2981 return std::make_pair((unsigned)Mips::LO0, &Mips::LO32RegClass);
2982 return std::make_pair((unsigned)Mips::LO0_64, &Mips::LO64RegClass);
2983 case 'x': // register suitable for indirect jump
2984 // Fixme: Not triggering the use of both hi and low
2985 // This will generate an error message
2986 return std::make_pair(0u, static_cast<const TargetRegisterClass*>(0));
2990 std::pair<unsigned, const TargetRegisterClass *> R;
2991 R = parseRegForInlineAsmConstraint(Constraint, VT);
2996 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
2999 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
3000 /// vector. If it is invalid, don't add anything to Ops.
3001 void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
3002 std::string &Constraint,
3003 std::vector<SDValue>&Ops,
3004 SelectionDAG &DAG) const {
3005 SDValue Result(0, 0);
3007 // Only support length 1 constraints for now.
3008 if (Constraint.length() > 1) return;
3010 char ConstraintLetter = Constraint[0];
3011 switch (ConstraintLetter) {
3012 default: break; // This will fall through to the generic implementation
3013 case 'I': // Signed 16 bit constant
3014 // If this fails, the parent routine will give an error
3015 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3016 EVT Type = Op.getValueType();
3017 int64_t Val = C->getSExtValue();
3018 if (isInt<16>(Val)) {
3019 Result = DAG.getTargetConstant(Val, Type);
3024 case 'J': // integer zero
3025 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3026 EVT Type = Op.getValueType();
3027 int64_t Val = C->getZExtValue();
3029 Result = DAG.getTargetConstant(0, Type);
3034 case 'K': // unsigned 16 bit immediate
3035 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3036 EVT Type = Op.getValueType();
3037 uint64_t Val = (uint64_t)C->getZExtValue();
3038 if (isUInt<16>(Val)) {
3039 Result = DAG.getTargetConstant(Val, Type);
3044 case 'L': // signed 32 bit immediate where lower 16 bits are 0
3045 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3046 EVT Type = Op.getValueType();
3047 int64_t Val = C->getSExtValue();
3048 if ((isInt<32>(Val)) && ((Val & 0xffff) == 0)){
3049 Result = DAG.getTargetConstant(Val, Type);
3054 case 'N': // immediate in the range of -65535 to -1 (inclusive)
3055 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3056 EVT Type = Op.getValueType();
3057 int64_t Val = C->getSExtValue();
3058 if ((Val >= -65535) && (Val <= -1)) {
3059 Result = DAG.getTargetConstant(Val, Type);
3064 case 'O': // signed 15 bit immediate
3065 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3066 EVT Type = Op.getValueType();
3067 int64_t Val = C->getSExtValue();
3068 if ((isInt<15>(Val))) {
3069 Result = DAG.getTargetConstant(Val, Type);
3074 case 'P': // immediate in the range of 1 to 65535 (inclusive)
3075 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3076 EVT Type = Op.getValueType();
3077 int64_t Val = C->getSExtValue();
3078 if ((Val <= 65535) && (Val >= 1)) {
3079 Result = DAG.getTargetConstant(Val, Type);
3086 if (Result.getNode()) {
3087 Ops.push_back(Result);
3091 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
3095 MipsTargetLowering::isLegalAddressingMode(const AddrMode &AM, Type *Ty) const {
3096 // No global is ever allowed as a base.
3101 case 0: // "r+i" or just "i", depending on HasBaseReg.
3104 if (!AM.HasBaseReg) // allow "r+i".
3106 return false; // disallow "r+r" or "r+r+i".
3115 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3116 // The Mips target isn't yet aware of offsets.
3120 EVT MipsTargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
3122 bool IsMemset, bool ZeroMemset,
3124 MachineFunction &MF) const {
3125 if (Subtarget->hasMips64())
3131 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3132 if (VT != MVT::f32 && VT != MVT::f64)
3134 if (Imm.isNegZero())
3136 return Imm.isZero();
3139 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3141 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3143 return TargetLowering::getJumpTableEncoding();
3146 /// This function returns true if CallSym is a long double emulation routine.
3147 static bool isF128SoftLibCall(const char *CallSym) {
3148 const char *const LibCalls[] =
3149 {"__addtf3", "__divtf3", "__eqtf2", "__extenddftf2", "__extendsftf2",
3150 "__fixtfdi", "__fixtfsi", "__fixtfti", "__fixunstfdi", "__fixunstfsi",
3151 "__fixunstfti", "__floatditf", "__floatsitf", "__floattitf",
3152 "__floatunditf", "__floatunsitf", "__floatuntitf", "__getf2", "__gttf2",
3153 "__letf2", "__lttf2", "__multf3", "__netf2", "__powitf2", "__subtf3",
3154 "__trunctfdf2", "__trunctfsf2", "__unordtf2",
3155 "ceill", "copysignl", "cosl", "exp2l", "expl", "floorl", "fmal", "fmodl",
3156 "log10l", "log2l", "logl", "nearbyintl", "powl", "rintl", "sinl", "sqrtl",
3159 const char * const *End = LibCalls + array_lengthof(LibCalls);
3161 // Check that LibCalls is sorted alphabetically.
3162 MipsTargetLowering::LTStr Comp;
3165 for (const char * const *I = LibCalls; I < End - 1; ++I)
3166 assert(Comp(*I, *(I + 1)));
3169 return std::binary_search(LibCalls, End, CallSym, Comp);
3172 /// This function returns true if Ty is fp128 or i128 which was originally a
3174 static bool originalTypeIsF128(const Type *Ty, const SDNode *CallNode) {
3175 if (Ty->isFP128Ty())
3178 const ExternalSymbolSDNode *ES =
3179 dyn_cast_or_null<const ExternalSymbolSDNode>(CallNode);
3181 // If the Ty is i128 and the function being called is a long double emulation
3182 // routine, then the original type is f128.
3183 return (ES && Ty->isIntegerTy(128) && isF128SoftLibCall(ES->getSymbol()));
3186 MipsTargetLowering::MipsCC::SpecialCallingConvType
3187 MipsTargetLowering::getSpecialCallingConv(SDValue Callee) const {
3188 MipsCC::SpecialCallingConvType SpecialCallingConv =
3189 MipsCC::NoSpecialCallingConv;;
3190 if (Subtarget->inMips16HardFloat()) {
3191 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
3192 llvm::StringRef Sym = G->getGlobal()->getName();
3193 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
3194 if (F->hasFnAttribute("__Mips16RetHelper")) {
3195 SpecialCallingConv = MipsCC::Mips16RetHelperConv;
3199 return SpecialCallingConv;
3202 MipsTargetLowering::MipsCC::MipsCC(
3203 CallingConv::ID CC, bool IsO32_, bool IsFP64_, CCState &Info,
3204 MipsCC::SpecialCallingConvType SpecialCallingConv_)
3205 : CCInfo(Info), CallConv(CC), IsO32(IsO32_), IsFP64(IsFP64_),
3206 SpecialCallingConv(SpecialCallingConv_){
3207 // Pre-allocate reserved argument area.
3208 CCInfo.AllocateStack(reservedArgArea(), 1);
3212 void MipsTargetLowering::MipsCC::
3213 analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Args,
3214 bool IsVarArg, bool IsSoftFloat, const SDNode *CallNode,
3215 std::vector<ArgListEntry> &FuncArgs) {
3216 assert((CallConv != CallingConv::Fast || !IsVarArg) &&
3217 "CallingConv::Fast shouldn't be used for vararg functions.");
3219 unsigned NumOpnds = Args.size();
3220 llvm::CCAssignFn *FixedFn = fixedArgFn(), *VarFn = varArgFn();
3222 for (unsigned I = 0; I != NumOpnds; ++I) {
3223 MVT ArgVT = Args[I].VT;
3224 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3227 if (ArgFlags.isByVal()) {
3228 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3232 if (IsVarArg && !Args[I].IsFixed)
3233 R = VarFn(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
3235 MVT RegVT = getRegVT(ArgVT, FuncArgs[Args[I].OrigArgIndex].Ty, CallNode,
3237 R = FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo);
3242 dbgs() << "Call operand #" << I << " has unhandled type "
3243 << EVT(ArgVT).getEVTString();
3245 llvm_unreachable(0);
3250 void MipsTargetLowering::MipsCC::
3251 analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Args,
3252 bool IsSoftFloat, Function::const_arg_iterator FuncArg) {
3253 unsigned NumArgs = Args.size();
3254 llvm::CCAssignFn *FixedFn = fixedArgFn();
3255 unsigned CurArgIdx = 0;
3257 for (unsigned I = 0; I != NumArgs; ++I) {
3258 MVT ArgVT = Args[I].VT;
3259 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3260 std::advance(FuncArg, Args[I].OrigArgIndex - CurArgIdx);
3261 CurArgIdx = Args[I].OrigArgIndex;
3263 if (ArgFlags.isByVal()) {
3264 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3268 MVT RegVT = getRegVT(ArgVT, FuncArg->getType(), 0, IsSoftFloat);
3270 if (!FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo))
3274 dbgs() << "Formal Arg #" << I << " has unhandled type "
3275 << EVT(ArgVT).getEVTString();
3277 llvm_unreachable(0);
3281 template<typename Ty>
3282 void MipsTargetLowering::MipsCC::
3283 analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat,
3284 const SDNode *CallNode, const Type *RetTy) const {
3287 if (IsSoftFloat && originalTypeIsF128(RetTy, CallNode))
3288 Fn = RetCC_F128Soft;
3292 for (unsigned I = 0, E = RetVals.size(); I < E; ++I) {
3293 MVT VT = RetVals[I].VT;
3294 ISD::ArgFlagsTy Flags = RetVals[I].Flags;
3295 MVT RegVT = this->getRegVT(VT, RetTy, CallNode, IsSoftFloat);
3297 if (Fn(I, VT, RegVT, CCValAssign::Full, Flags, this->CCInfo)) {
3299 dbgs() << "Call result #" << I << " has unhandled type "
3300 << EVT(VT).getEVTString() << '\n';
3302 llvm_unreachable(0);
3307 void MipsTargetLowering::MipsCC::
3308 analyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins, bool IsSoftFloat,
3309 const SDNode *CallNode, const Type *RetTy) const {
3310 analyzeReturn(Ins, IsSoftFloat, CallNode, RetTy);
3313 void MipsTargetLowering::MipsCC::
3314 analyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs, bool IsSoftFloat,
3315 const Type *RetTy) const {
3316 analyzeReturn(Outs, IsSoftFloat, 0, RetTy);
3320 MipsTargetLowering::MipsCC::handleByValArg(unsigned ValNo, MVT ValVT,
3322 CCValAssign::LocInfo LocInfo,
3323 ISD::ArgFlagsTy ArgFlags) {
3324 assert(ArgFlags.getByValSize() && "Byval argument's size shouldn't be 0.");
3326 struct ByValArgInfo ByVal;
3327 unsigned RegSize = regSize();
3328 unsigned ByValSize = RoundUpToAlignment(ArgFlags.getByValSize(), RegSize);
3329 unsigned Align = std::min(std::max(ArgFlags.getByValAlign(), RegSize),
3332 if (useRegsForByval())
3333 allocateRegs(ByVal, ByValSize, Align);
3335 // Allocate space on caller's stack.
3336 ByVal.Address = CCInfo.AllocateStack(ByValSize - RegSize * ByVal.NumRegs,
3338 CCInfo.addLoc(CCValAssign::getMem(ValNo, ValVT, ByVal.Address, LocVT,
3340 ByValArgs.push_back(ByVal);
3343 unsigned MipsTargetLowering::MipsCC::numIntArgRegs() const {
3344 return IsO32 ? array_lengthof(O32IntRegs) : array_lengthof(Mips64IntRegs);
3347 unsigned MipsTargetLowering::MipsCC::reservedArgArea() const {
3348 return (IsO32 && (CallConv != CallingConv::Fast)) ? 16 : 0;
3351 const uint16_t *MipsTargetLowering::MipsCC::intArgRegs() const {
3352 return IsO32 ? O32IntRegs : Mips64IntRegs;
3355 llvm::CCAssignFn *MipsTargetLowering::MipsCC::fixedArgFn() const {
3356 if (CallConv == CallingConv::Fast)
3357 return CC_Mips_FastCC;
3359 if (SpecialCallingConv == Mips16RetHelperConv)
3360 return CC_Mips16RetHelper;
3361 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN;
3364 llvm::CCAssignFn *MipsTargetLowering::MipsCC::varArgFn() const {
3365 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN_VarArg;
3368 const uint16_t *MipsTargetLowering::MipsCC::shadowRegs() const {
3369 return IsO32 ? O32IntRegs : Mips64DPRegs;
3372 void MipsTargetLowering::MipsCC::allocateRegs(ByValArgInfo &ByVal,
3375 unsigned RegSize = regSize(), NumIntArgRegs = numIntArgRegs();
3376 const uint16_t *IntArgRegs = intArgRegs(), *ShadowRegs = shadowRegs();
3377 assert(!(ByValSize % RegSize) && !(Align % RegSize) &&
3378 "Byval argument's size and alignment should be a multiple of"
3381 ByVal.FirstIdx = CCInfo.getFirstUnallocated(IntArgRegs, NumIntArgRegs);
3383 // If Align > RegSize, the first arg register must be even.
3384 if ((Align > RegSize) && (ByVal.FirstIdx % 2)) {
3385 CCInfo.AllocateReg(IntArgRegs[ByVal.FirstIdx], ShadowRegs[ByVal.FirstIdx]);
3389 // Mark the registers allocated.
3390 for (unsigned I = ByVal.FirstIdx; ByValSize && (I < NumIntArgRegs);
3391 ByValSize -= RegSize, ++I, ++ByVal.NumRegs)
3392 CCInfo.AllocateReg(IntArgRegs[I], ShadowRegs[I]);
3395 MVT MipsTargetLowering::MipsCC::getRegVT(MVT VT, const Type *OrigTy,
3396 const SDNode *CallNode,
3397 bool IsSoftFloat) const {
3398 if (IsSoftFloat || IsO32)
3401 // Check if the original type was fp128.
3402 if (originalTypeIsF128(OrigTy, CallNode)) {
3403 assert(VT == MVT::i64);
3410 void MipsTargetLowering::
3411 copyByValRegs(SDValue Chain, SDLoc DL, std::vector<SDValue> &OutChains,
3412 SelectionDAG &DAG, const ISD::ArgFlagsTy &Flags,
3413 SmallVectorImpl<SDValue> &InVals, const Argument *FuncArg,
3414 const MipsCC &CC, const ByValArgInfo &ByVal) const {
3415 MachineFunction &MF = DAG.getMachineFunction();
3416 MachineFrameInfo *MFI = MF.getFrameInfo();
3417 unsigned RegAreaSize = ByVal.NumRegs * CC.regSize();
3418 unsigned FrameObjSize = std::max(Flags.getByValSize(), RegAreaSize);
3422 FrameObjOffset = (int)CC.reservedArgArea() -
3423 (int)((CC.numIntArgRegs() - ByVal.FirstIdx) * CC.regSize());
3425 FrameObjOffset = ByVal.Address;
3427 // Create frame object.
3428 EVT PtrTy = getPointerTy();
3429 int FI = MFI->CreateFixedObject(FrameObjSize, FrameObjOffset, true);
3430 SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
3431 InVals.push_back(FIN);
3436 // Copy arg registers.
3437 MVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
3438 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3440 for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
3441 unsigned ArgReg = CC.intArgRegs()[ByVal.FirstIdx + I];
3442 unsigned VReg = addLiveIn(MF, ArgReg, RC);
3443 unsigned Offset = I * CC.regSize();
3444 SDValue StorePtr = DAG.getNode(ISD::ADD, DL, PtrTy, FIN,
3445 DAG.getConstant(Offset, PtrTy));
3446 SDValue Store = DAG.getStore(Chain, DL, DAG.getRegister(VReg, RegTy),
3447 StorePtr, MachinePointerInfo(FuncArg, Offset),
3449 OutChains.push_back(Store);
3453 // Copy byVal arg to registers and stack.
3454 void MipsTargetLowering::
3455 passByValArg(SDValue Chain, SDLoc DL,
3456 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
3457 SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr,
3458 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
3459 const MipsCC &CC, const ByValArgInfo &ByVal,
3460 const ISD::ArgFlagsTy &Flags, bool isLittle) const {
3461 unsigned ByValSize = Flags.getByValSize();
3462 unsigned Offset = 0; // Offset in # of bytes from the beginning of struct.
3463 unsigned RegSize = CC.regSize();
3464 unsigned Alignment = std::min(Flags.getByValAlign(), RegSize);
3465 EVT PtrTy = getPointerTy(), RegTy = MVT::getIntegerVT(RegSize * 8);
3467 if (ByVal.NumRegs) {
3468 const uint16_t *ArgRegs = CC.intArgRegs();
3469 bool LeftoverBytes = (ByVal.NumRegs * RegSize > ByValSize);
3472 // Copy words to registers.
3473 for (; I < ByVal.NumRegs - LeftoverBytes; ++I, Offset += RegSize) {
3474 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3475 DAG.getConstant(Offset, PtrTy));
3476 SDValue LoadVal = DAG.getLoad(RegTy, DL, Chain, LoadPtr,
3477 MachinePointerInfo(), false, false, false,
3479 MemOpChains.push_back(LoadVal.getValue(1));
3480 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3481 RegsToPass.push_back(std::make_pair(ArgReg, LoadVal));
3484 // Return if the struct has been fully copied.
3485 if (ByValSize == Offset)
3488 // Copy the remainder of the byval argument with sub-word loads and shifts.
3489 if (LeftoverBytes) {
3490 assert((ByValSize > Offset) && (ByValSize < Offset + RegSize) &&
3491 "Size of the remainder should be smaller than RegSize.");
3494 for (unsigned LoadSize = RegSize / 2, TotalSizeLoaded = 0;
3495 Offset < ByValSize; LoadSize /= 2) {
3496 unsigned RemSize = ByValSize - Offset;
3498 if (RemSize < LoadSize)
3502 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3503 DAG.getConstant(Offset, PtrTy));
3505 DAG.getExtLoad(ISD::ZEXTLOAD, DL, RegTy, Chain, LoadPtr,
3506 MachinePointerInfo(), MVT::getIntegerVT(LoadSize * 8),
3507 false, false, Alignment);
3508 MemOpChains.push_back(LoadVal.getValue(1));
3510 // Shift the loaded value.
3514 Shamt = TotalSizeLoaded;
3516 Shamt = (RegSize - (TotalSizeLoaded + LoadSize)) * 8;
3518 SDValue Shift = DAG.getNode(ISD::SHL, DL, RegTy, LoadVal,
3519 DAG.getConstant(Shamt, MVT::i32));
3522 Val = DAG.getNode(ISD::OR, DL, RegTy, Val, Shift);
3527 TotalSizeLoaded += LoadSize;
3528 Alignment = std::min(Alignment, LoadSize);
3531 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3532 RegsToPass.push_back(std::make_pair(ArgReg, Val));
3537 // Copy remainder of byval arg to it with memcpy.
3538 unsigned MemCpySize = ByValSize - Offset;
3539 SDValue Src = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3540 DAG.getConstant(Offset, PtrTy));
3541 SDValue Dst = DAG.getNode(ISD::ADD, DL, PtrTy, StackPtr,
3542 DAG.getIntPtrConstant(ByVal.Address));
3543 Chain = DAG.getMemcpy(Chain, DL, Dst, Src,
3544 DAG.getConstant(MemCpySize, PtrTy), Alignment,
3545 /*isVolatile=*/false, /*AlwaysInline=*/false,
3546 MachinePointerInfo(0), MachinePointerInfo(0));
3547 MemOpChains.push_back(Chain);
3551 MipsTargetLowering::writeVarArgRegs(std::vector<SDValue> &OutChains,
3552 const MipsCC &CC, SDValue Chain,
3553 SDLoc DL, SelectionDAG &DAG) const {
3554 unsigned NumRegs = CC.numIntArgRegs();
3555 const uint16_t *ArgRegs = CC.intArgRegs();
3556 const CCState &CCInfo = CC.getCCInfo();
3557 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumRegs);
3558 unsigned RegSize = CC.regSize();
3559 MVT RegTy = MVT::getIntegerVT(RegSize * 8);
3560 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3561 MachineFunction &MF = DAG.getMachineFunction();
3562 MachineFrameInfo *MFI = MF.getFrameInfo();
3563 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
3565 // Offset of the first variable argument from stack pointer.
3569 VaArgOffset = RoundUpToAlignment(CCInfo.getNextStackOffset(), RegSize);
3572 (int)CC.reservedArgArea() - (int)(RegSize * (NumRegs - Idx));
3574 // Record the frame index of the first variable argument
3575 // which is a value necessary to VASTART.
3576 int FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3577 MipsFI->setVarArgsFrameIndex(FI);
3579 // Copy the integer registers that have not been used for argument passing
3580 // to the argument register save area. For O32, the save area is allocated
3581 // in the caller's stack frame, while for N32/64, it is allocated in the
3582 // callee's stack frame.
3583 for (unsigned I = Idx; I < NumRegs; ++I, VaArgOffset += RegSize) {
3584 unsigned Reg = addLiveIn(MF, ArgRegs[I], RC);
3585 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegTy);
3586 FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3587 SDValue PtrOff = DAG.getFrameIndex(FI, getPointerTy());
3588 SDValue Store = DAG.getStore(Chain, DL, ArgValue, PtrOff,
3589 MachinePointerInfo(), false, false, 0);
3590 cast<StoreSDNode>(Store.getNode())->getMemOperand()->setValue(0);
3591 OutChains.push_back(Store);