1 //===-- SparcISelDAGToDAG.cpp - A dag to dag inst selector for Sparc ------===//
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 an instruction selector for the SPARC target.
12 //===----------------------------------------------------------------------===//
15 #include "SparcTargetMachine.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Function.h"
18 #include "llvm/Intrinsics.h"
19 #include "llvm/CodeGen/MachineFrameInfo.h"
20 #include "llvm/CodeGen/MachineFunction.h"
21 #include "llvm/CodeGen/MachineInstrBuilder.h"
22 #include "llvm/CodeGen/MachineRegisterInfo.h"
23 #include "llvm/CodeGen/SelectionDAG.h"
24 #include "llvm/CodeGen/SelectionDAGISel.h"
25 #include "llvm/Target/TargetLowering.h"
26 #include "llvm/Support/Compiler.h"
27 #include "llvm/Support/Debug.h"
32 //===----------------------------------------------------------------------===//
33 // TargetLowering Implementation
34 //===----------------------------------------------------------------------===//
38 FIRST_NUMBER = ISD::BUILTIN_OP_END+SP::INSTRUCTION_LIST_END,
39 CMPICC, // Compare two GPR operands, set icc.
40 CMPFCC, // Compare two FP operands, set fcc.
41 BRICC, // Branch to dest on icc condition
42 BRFCC, // Branch to dest on fcc condition
43 SELECT_ICC, // Select between two values using the current ICC flags.
44 SELECT_FCC, // Select between two values using the current FCC flags.
46 Hi, Lo, // Hi/Lo operations, typically on a global address.
48 FTOI, // FP to Int within a FP register.
49 ITOF, // Int to FP within a FP register.
51 CALL, // A call instruction.
52 RET_FLAG // Return with a flag operand.
56 /// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
58 static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
60 default: assert(0 && "Unknown integer condition code!");
61 case ISD::SETEQ: return SPCC::ICC_E;
62 case ISD::SETNE: return SPCC::ICC_NE;
63 case ISD::SETLT: return SPCC::ICC_L;
64 case ISD::SETGT: return SPCC::ICC_G;
65 case ISD::SETLE: return SPCC::ICC_LE;
66 case ISD::SETGE: return SPCC::ICC_GE;
67 case ISD::SETULT: return SPCC::ICC_CS;
68 case ISD::SETULE: return SPCC::ICC_LEU;
69 case ISD::SETUGT: return SPCC::ICC_GU;
70 case ISD::SETUGE: return SPCC::ICC_CC;
74 /// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
76 static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
78 default: assert(0 && "Unknown fp condition code!");
80 case ISD::SETOEQ: return SPCC::FCC_E;
82 case ISD::SETUNE: return SPCC::FCC_NE;
84 case ISD::SETOLT: return SPCC::FCC_L;
86 case ISD::SETOGT: return SPCC::FCC_G;
88 case ISD::SETOLE: return SPCC::FCC_LE;
90 case ISD::SETOGE: return SPCC::FCC_GE;
91 case ISD::SETULT: return SPCC::FCC_UL;
92 case ISD::SETULE: return SPCC::FCC_ULE;
93 case ISD::SETUGT: return SPCC::FCC_UG;
94 case ISD::SETUGE: return SPCC::FCC_UGE;
95 case ISD::SETUO: return SPCC::FCC_U;
96 case ISD::SETO: return SPCC::FCC_O;
97 case ISD::SETONE: return SPCC::FCC_LG;
98 case ISD::SETUEQ: return SPCC::FCC_UE;
103 class SparcTargetLowering : public TargetLowering {
104 int VarArgsFrameOffset; // Frame offset to start of varargs area.
106 SparcTargetLowering(TargetMachine &TM);
107 virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
109 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
110 /// in Mask are known to be either zero or one and return them in the
111 /// KnownZero/KnownOne bitsets.
112 virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
116 const SelectionDAG &DAG,
117 unsigned Depth = 0) const;
119 virtual std::vector<SDOperand>
120 LowerArguments(Function &F, SelectionDAG &DAG);
121 virtual std::pair<SDOperand, SDOperand>
122 LowerCallTo(SDOperand Chain, const Type *RetTy,
123 bool RetSExt, bool RetZExt, bool isVarArg,
124 unsigned CC, bool isTailCall, SDOperand Callee,
125 ArgListTy &Args, SelectionDAG &DAG);
126 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
127 MachineBasicBlock *MBB);
129 virtual const char *getTargetNodeName(unsigned Opcode) const;
133 SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
134 : TargetLowering(TM) {
136 // Set up the register classes.
137 addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
138 addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
139 addRegisterClass(MVT::f64, SP::DFPRegsRegisterClass);
141 // Turn FP extload into load/fextend
142 setLoadXAction(ISD::EXTLOAD, MVT::f32, Expand);
143 // Sparc doesn't have i1 sign extending load
144 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
145 // Turn FP truncstore into trunc + store.
146 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
148 // Custom legalize GlobalAddress nodes into LO/HI parts.
149 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
150 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
151 setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
153 // Sparc doesn't have sext_inreg, replace them with shl/sra
154 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
155 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
156 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
158 // Sparc has no REM or DIVREM operations.
159 setOperationAction(ISD::UREM, MVT::i32, Expand);
160 setOperationAction(ISD::SREM, MVT::i32, Expand);
161 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
162 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
164 // Custom expand fp<->sint
165 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
166 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
169 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
170 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
172 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
173 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
175 // Sparc has no select or setcc: expand to SELECT_CC.
176 setOperationAction(ISD::SELECT, MVT::i32, Expand);
177 setOperationAction(ISD::SELECT, MVT::f32, Expand);
178 setOperationAction(ISD::SELECT, MVT::f64, Expand);
179 setOperationAction(ISD::SETCC, MVT::i32, Expand);
180 setOperationAction(ISD::SETCC, MVT::f32, Expand);
181 setOperationAction(ISD::SETCC, MVT::f64, Expand);
183 // Sparc doesn't have BRCOND either, it has BR_CC.
184 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
185 setOperationAction(ISD::BRIND, MVT::Other, Expand);
186 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
187 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
188 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
189 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
191 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
192 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
193 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
195 // SPARC has no intrinsics for these particular operations.
196 setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
197 setOperationAction(ISD::MEMSET, MVT::Other, Expand);
198 setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
199 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
200 setOperationAction(ISD::PREFETCH, MVT::Other, Expand);
202 setOperationAction(ISD::FSIN , MVT::f64, Expand);
203 setOperationAction(ISD::FCOS , MVT::f64, Expand);
204 setOperationAction(ISD::FREM , MVT::f64, Expand);
205 setOperationAction(ISD::FSIN , MVT::f32, Expand);
206 setOperationAction(ISD::FCOS , MVT::f32, Expand);
207 setOperationAction(ISD::FREM , MVT::f32, Expand);
208 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
209 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
210 setOperationAction(ISD::CTLZ , MVT::i32, Expand);
211 setOperationAction(ISD::ROTL , MVT::i32, Expand);
212 setOperationAction(ISD::ROTR , MVT::i32, Expand);
213 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
214 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
215 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
216 setOperationAction(ISD::FPOW , MVT::f64, Expand);
217 setOperationAction(ISD::FPOW , MVT::f32, Expand);
219 setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
220 setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
221 setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
223 // FIXME: Sparc provides these multiplies, but we don't have them yet.
224 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
226 // We don't have line number support yet.
227 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
228 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
229 setOperationAction(ISD::LABEL, MVT::Other, Expand);
231 // RET must be custom lowered, to meet ABI requirements
232 setOperationAction(ISD::RET , MVT::Other, Custom);
234 // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
235 setOperationAction(ISD::VASTART , MVT::Other, Custom);
236 // VAARG needs to be lowered to not do unaligned accesses for doubles.
237 setOperationAction(ISD::VAARG , MVT::Other, Custom);
239 // Use the default implementation.
240 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
241 setOperationAction(ISD::VAEND , MVT::Other, Expand);
242 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
243 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
244 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
246 // No debug info support yet.
247 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
248 setOperationAction(ISD::LABEL, MVT::Other, Expand);
249 setOperationAction(ISD::DECLARE, MVT::Other, Expand);
251 setStackPointerRegisterToSaveRestore(SP::O6);
253 if (TM.getSubtarget<SparcSubtarget>().isV9())
254 setOperationAction(ISD::CTPOP, MVT::i32, Legal);
256 computeRegisterProperties();
259 const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
262 case SPISD::CMPICC: return "SPISD::CMPICC";
263 case SPISD::CMPFCC: return "SPISD::CMPFCC";
264 case SPISD::BRICC: return "SPISD::BRICC";
265 case SPISD::BRFCC: return "SPISD::BRFCC";
266 case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
267 case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
268 case SPISD::Hi: return "SPISD::Hi";
269 case SPISD::Lo: return "SPISD::Lo";
270 case SPISD::FTOI: return "SPISD::FTOI";
271 case SPISD::ITOF: return "SPISD::ITOF";
272 case SPISD::CALL: return "SPISD::CALL";
273 case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
277 /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
278 /// be zero. Op is expected to be a target specific node. Used by DAG
280 void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
284 const SelectionDAG &DAG,
285 unsigned Depth) const {
286 APInt KnownZero2, KnownOne2;
287 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
289 switch (Op.getOpcode()) {
291 case SPISD::SELECT_ICC:
292 case SPISD::SELECT_FCC:
293 DAG.ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne,
295 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2,
297 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
298 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
300 // Only known if known in both the LHS and RHS.
301 KnownOne &= KnownOne2;
302 KnownZero &= KnownZero2;
307 /// LowerArguments - V8 uses a very simple ABI, where all values are passed in
308 /// either one or two GPRs, including FP values. TODO: we should pass FP values
309 /// in FP registers for fastcc functions.
310 std::vector<SDOperand>
311 SparcTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
312 MachineFunction &MF = DAG.getMachineFunction();
313 MachineRegisterInfo &RegInfo = MF.getRegInfo();
314 std::vector<SDOperand> ArgValues;
316 static const unsigned ArgRegs[] = {
317 SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
320 const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
321 unsigned ArgOffset = 68;
323 SDOperand Root = DAG.getRoot();
324 std::vector<SDOperand> OutChains;
326 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
327 MVT::ValueType ObjectVT = getValueType(I->getType());
330 default: assert(0 && "Unhandled argument type!");
335 if (I->use_empty()) { // Argument is dead.
336 if (CurArgReg < ArgRegEnd) ++CurArgReg;
337 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
338 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
339 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
340 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
341 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
342 if (ObjectVT != MVT::i32) {
343 unsigned AssertOp = ISD::AssertSext;
344 Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
345 DAG.getValueType(ObjectVT));
346 Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
348 ArgValues.push_back(Arg);
350 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
351 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
353 if (ObjectVT == MVT::i32) {
354 Load = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
356 ISD::LoadExtType LoadOp = ISD::SEXTLOAD;
358 // Sparc is big endian, so add an offset based on the ObjectVT.
359 unsigned Offset = 4-std::max(1U, MVT::getSizeInBits(ObjectVT)/8);
360 FIPtr = DAG.getNode(ISD::ADD, MVT::i32, FIPtr,
361 DAG.getConstant(Offset, MVT::i32));
362 Load = DAG.getExtLoad(LoadOp, MVT::i32, Root, FIPtr,
364 Load = DAG.getNode(ISD::TRUNCATE, ObjectVT, Load);
366 ArgValues.push_back(Load);
372 if (I->use_empty()) { // Argument is dead.
373 if (CurArgReg < ArgRegEnd) ++CurArgReg;
374 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
375 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
376 // FP value is passed in an integer register.
377 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
378 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
379 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
381 Arg = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Arg);
382 ArgValues.push_back(Arg);
384 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
385 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
386 SDOperand Load = DAG.getLoad(MVT::f32, Root, FIPtr, NULL, 0);
387 ArgValues.push_back(Load);
394 if (I->use_empty()) { // Argument is dead.
395 if (CurArgReg < ArgRegEnd) ++CurArgReg;
396 if (CurArgReg < ArgRegEnd) ++CurArgReg;
397 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
398 } else if (/* FIXME: Apparently this isn't safe?? */
399 0 && CurArgReg == ArgRegEnd && ObjectVT == MVT::f64 &&
400 ((CurArgReg-ArgRegs) & 1) == 0) {
401 // If this is a double argument and the whole thing lives on the stack,
402 // and the argument is aligned, load the double straight from the stack.
403 // We can't do a load in cases like void foo([6ints], int,double),
404 // because the double wouldn't be aligned!
405 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(8, ArgOffset);
406 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
407 ArgValues.push_back(DAG.getLoad(MVT::f64, Root, FIPtr, NULL, 0));
410 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
411 unsigned VRegHi = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
412 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegHi);
413 HiVal = DAG.getCopyFromReg(Root, VRegHi, MVT::i32);
415 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
416 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
417 HiVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
421 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
422 unsigned VRegLo = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
423 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegLo);
424 LoVal = DAG.getCopyFromReg(Root, VRegLo, MVT::i32);
426 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4);
427 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
428 LoVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
431 // Compose the two halves together into an i64 unit.
432 SDOperand WholeValue =
433 DAG.getNode(ISD::BUILD_PAIR, MVT::i64, LoVal, HiVal);
435 // If we want a double, do a bit convert.
436 if (ObjectVT == MVT::f64)
437 WholeValue = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, WholeValue);
439 ArgValues.push_back(WholeValue);
446 // Store remaining ArgRegs to the stack if this is a varargs function.
447 if (F.getFunctionType()->isVarArg()) {
448 // Remember the vararg offset for the va_start implementation.
449 VarArgsFrameOffset = ArgOffset;
451 for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
452 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
453 MF.getRegInfo().addLiveIn(*CurArgReg, VReg);
454 SDOperand Arg = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
456 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
457 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
459 OutChains.push_back(DAG.getStore(DAG.getRoot(), Arg, FIPtr, NULL, 0));
464 if (!OutChains.empty())
465 DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other,
466 &OutChains[0], OutChains.size()));
468 // Finally, inform the code generator which regs we return values in.
469 switch (getValueType(F.getReturnType())) {
470 default: assert(0 && "Unknown type!");
471 case MVT::isVoid: break;
476 MF.getRegInfo().addLiveOut(SP::I0);
479 MF.getRegInfo().addLiveOut(SP::I0);
480 MF.getRegInfo().addLiveOut(SP::I1);
483 MF.getRegInfo().addLiveOut(SP::F0);
486 MF.getRegInfo().addLiveOut(SP::D0);
493 std::pair<SDOperand, SDOperand>
494 SparcTargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
495 bool RetSExt, bool RetZExt, bool isVarArg,
496 unsigned CC, bool isTailCall, SDOperand Callee,
497 ArgListTy &Args, SelectionDAG &DAG) {
498 // Count the size of the outgoing arguments.
499 unsigned ArgsSize = 0;
500 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
501 switch (getValueType(Args[i].Ty)) {
502 default: assert(0 && "Unknown value type!");
517 ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
521 // Keep stack frames 8-byte aligned.
522 ArgsSize = (ArgsSize+7) & ~7;
524 Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(ArgsSize, getPointerTy()));
527 std::vector<SDOperand> Stores;
528 std::vector<SDOperand> RegValuesToPass;
529 unsigned ArgOffset = 68;
530 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
531 SDOperand Val = Args[i].Node;
532 MVT::ValueType ObjectVT = Val.getValueType();
533 SDOperand ValToStore(0, 0);
536 default: assert(0 && "Unhandled argument type!");
540 // Promote the integer to 32-bits. If the input type is signed, use a
541 // sign extend, otherwise use a zero extend.
542 ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
544 ExtendKind = ISD::SIGN_EXTEND;
545 else if (Args[i].isZExt)
546 ExtendKind = ISD::ZERO_EXTEND;
547 Val = DAG.getNode(ExtendKind, MVT::i32, Val);
553 if (RegValuesToPass.size() >= 6) {
556 RegValuesToPass.push_back(Val);
561 if (RegValuesToPass.size() >= 6) {
564 // Convert this to a FP value in an int reg.
565 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Val);
566 RegValuesToPass.push_back(Val);
571 // If we can store this directly into the outgoing slot, do so. We can
572 // do this when all ArgRegs are used and if the outgoing slot is aligned.
573 // FIXME: McGill/misr fails with this.
574 if (0 && RegValuesToPass.size() >= 6 && ((ArgOffset-68) & 7) == 0) {
579 // Otherwise, convert this to a FP value in int regs.
580 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i64, Val);
584 if (RegValuesToPass.size() >= 6) {
585 ValToStore = Val; // Whole thing is passed in memory.
589 // Split the value into top and bottom part. Top part goes in a reg.
590 SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
591 DAG.getConstant(1, MVT::i32));
592 SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
593 DAG.getConstant(0, MVT::i32));
594 RegValuesToPass.push_back(Hi);
596 if (RegValuesToPass.size() >= 6) {
601 RegValuesToPass.push_back(Lo);
606 if (ValToStore.Val) {
608 StackPtr = DAG.getRegister(SP::O6, MVT::i32);
610 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
611 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
612 Stores.push_back(DAG.getStore(Chain, ValToStore, PtrOff, NULL, 0));
614 ArgOffset += ObjSize;
617 // Emit all stores, make sure the occur before any copies into physregs.
619 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Stores[0],Stores.size());
621 static const unsigned ArgRegs[] = {
622 SP::O0, SP::O1, SP::O2, SP::O3, SP::O4, SP::O5
625 // Build a sequence of copy-to-reg nodes chained together with token chain
626 // and flag operands which copy the outgoing args into O[0-5].
628 for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
629 Chain = DAG.getCopyToReg(Chain, ArgRegs[i], RegValuesToPass[i], InFlag);
630 InFlag = Chain.getValue(1);
633 // If the callee is a GlobalAddress node (quite common, every direct call is)
634 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
635 // Likewise ExternalSymbol -> TargetExternalSymbol.
636 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
637 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i32);
638 else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
639 Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
641 std::vector<MVT::ValueType> NodeTys;
642 NodeTys.push_back(MVT::Other); // Returns a chain
643 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
644 SDOperand Ops[] = { Chain, Callee, InFlag };
645 Chain = DAG.getNode(SPISD::CALL, NodeTys, Ops, InFlag.Val ? 3 : 2);
646 InFlag = Chain.getValue(1);
648 MVT::ValueType RetTyVT = getValueType(RetTy);
650 if (RetTyVT != MVT::isVoid) {
652 default: assert(0 && "Unknown value type to return!");
656 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
657 Chain = RetVal.getValue(1);
659 // Add a note to keep track of whether it is sign or zero extended.
660 ISD::NodeType AssertKind = ISD::DELETED_NODE;
662 AssertKind = ISD::AssertSext;
664 AssertKind = ISD::AssertZext;
666 if (AssertKind != ISD::DELETED_NODE)
667 RetVal = DAG.getNode(AssertKind, MVT::i32, RetVal,
668 DAG.getValueType(RetTyVT));
670 RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
674 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
675 Chain = RetVal.getValue(1);
678 RetVal = DAG.getCopyFromReg(Chain, SP::F0, MVT::f32, InFlag);
679 Chain = RetVal.getValue(1);
682 RetVal = DAG.getCopyFromReg(Chain, SP::D0, MVT::f64, InFlag);
683 Chain = RetVal.getValue(1);
686 SDOperand Lo = DAG.getCopyFromReg(Chain, SP::O1, MVT::i32, InFlag);
687 SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), SP::O0, MVT::i32,
689 RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
690 Chain = Hi.getValue(1);
695 Chain = DAG.getCALLSEQ_END(Chain,
696 DAG.getConstant(ArgsSize, getPointerTy()),
697 DAG.getConstant(0, getPointerTy()),
699 return std::make_pair(RetVal, Chain);
702 // Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
703 // set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
704 static void LookThroughSetCC(SDOperand &LHS, SDOperand &RHS,
705 ISD::CondCode CC, unsigned &SPCC) {
706 if (isa<ConstantSDNode>(RHS) && cast<ConstantSDNode>(RHS)->getValue() == 0 &&
708 ((LHS.getOpcode() == SPISD::SELECT_ICC &&
709 LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
710 (LHS.getOpcode() == SPISD::SELECT_FCC &&
711 LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
712 isa<ConstantSDNode>(LHS.getOperand(0)) &&
713 isa<ConstantSDNode>(LHS.getOperand(1)) &&
714 cast<ConstantSDNode>(LHS.getOperand(0))->getValue() == 1 &&
715 cast<ConstantSDNode>(LHS.getOperand(1))->getValue() == 0) {
716 SDOperand CMPCC = LHS.getOperand(3);
717 SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getValue();
718 LHS = CMPCC.getOperand(0);
719 RHS = CMPCC.getOperand(1);
724 SDOperand SparcTargetLowering::
725 LowerOperation(SDOperand Op, SelectionDAG &DAG) {
726 switch (Op.getOpcode()) {
727 default: assert(0 && "Should not custom lower this!");
728 case ISD::GlobalTLSAddress:
729 assert(0 && "TLS not implemented for Sparc.");
730 case ISD::GlobalAddress: {
731 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
732 SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
733 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, GA);
734 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, GA);
735 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
737 case ISD::ConstantPool: {
738 Constant *C = cast<ConstantPoolSDNode>(Op)->getConstVal();
739 SDOperand CP = DAG.getTargetConstantPool(C, MVT::i32,
740 cast<ConstantPoolSDNode>(Op)->getAlignment());
741 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, CP);
742 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, CP);
743 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
745 case ISD::FP_TO_SINT:
746 // Convert the fp value to integer in an FP register.
747 assert(Op.getValueType() == MVT::i32);
748 Op = DAG.getNode(SPISD::FTOI, MVT::f32, Op.getOperand(0));
749 return DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Op);
750 case ISD::SINT_TO_FP: {
751 assert(Op.getOperand(0).getValueType() == MVT::i32);
752 SDOperand Tmp = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Op.getOperand(0));
753 // Convert the int value to FP in an FP register.
754 return DAG.getNode(SPISD::ITOF, Op.getValueType(), Tmp);
757 SDOperand Chain = Op.getOperand(0);
758 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
759 SDOperand LHS = Op.getOperand(2);
760 SDOperand RHS = Op.getOperand(3);
761 SDOperand Dest = Op.getOperand(4);
762 unsigned Opc, SPCC = ~0U;
764 // If this is a br_cc of a "setcc", and if the setcc got lowered into
765 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
766 LookThroughSetCC(LHS, RHS, CC, SPCC);
768 // Get the condition flag.
769 SDOperand CompareFlag;
770 if (LHS.getValueType() == MVT::i32) {
771 std::vector<MVT::ValueType> VTs;
772 VTs.push_back(MVT::i32);
773 VTs.push_back(MVT::Flag);
774 SDOperand Ops[2] = { LHS, RHS };
775 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
776 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
779 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
780 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
783 return DAG.getNode(Opc, MVT::Other, Chain, Dest,
784 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
786 case ISD::SELECT_CC: {
787 SDOperand LHS = Op.getOperand(0);
788 SDOperand RHS = Op.getOperand(1);
789 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
790 SDOperand TrueVal = Op.getOperand(2);
791 SDOperand FalseVal = Op.getOperand(3);
792 unsigned Opc, SPCC = ~0U;
794 // If this is a select_cc of a "setcc", and if the setcc got lowered into
795 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
796 LookThroughSetCC(LHS, RHS, CC, SPCC);
798 SDOperand CompareFlag;
799 if (LHS.getValueType() == MVT::i32) {
800 std::vector<MVT::ValueType> VTs;
801 VTs.push_back(LHS.getValueType()); // subcc returns a value
802 VTs.push_back(MVT::Flag);
803 SDOperand Ops[2] = { LHS, RHS };
804 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
805 Opc = SPISD::SELECT_ICC;
806 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
808 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
809 Opc = SPISD::SELECT_FCC;
810 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
812 return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
813 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
816 // vastart just stores the address of the VarArgsFrameIndex slot into the
817 // memory location argument.
818 SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
819 DAG.getRegister(SP::I6, MVT::i32),
820 DAG.getConstant(VarArgsFrameOffset, MVT::i32));
821 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
822 return DAG.getStore(Op.getOperand(0), Offset, Op.getOperand(1), SV, 0);
825 SDNode *Node = Op.Val;
826 MVT::ValueType VT = Node->getValueType(0);
827 SDOperand InChain = Node->getOperand(0);
828 SDOperand VAListPtr = Node->getOperand(1);
829 const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
830 SDOperand VAList = DAG.getLoad(getPointerTy(), InChain, VAListPtr, SV, 0);
831 // Increment the pointer, VAList, to the next vaarg
832 SDOperand NextPtr = DAG.getNode(ISD::ADD, getPointerTy(), VAList,
833 DAG.getConstant(MVT::getSizeInBits(VT)/8,
835 // Store the incremented VAList to the legalized pointer
836 InChain = DAG.getStore(VAList.getValue(1), NextPtr,
838 // Load the actual argument out of the pointer VAList, unless this is an
840 if (VT != MVT::f64) {
841 return DAG.getLoad(VT, InChain, VAList, NULL, 0);
843 // Otherwise, load it as i64, then do a bitconvert.
844 SDOperand V = DAG.getLoad(MVT::i64, InChain, VAList, NULL, 0);
845 std::vector<MVT::ValueType> Tys;
846 Tys.push_back(MVT::f64);
847 Tys.push_back(MVT::Other);
848 // Bit-Convert the value to f64.
849 SDOperand Ops[2] = { DAG.getNode(ISD::BIT_CONVERT, MVT::f64, V),
851 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
854 case ISD::DYNAMIC_STACKALLOC: {
855 SDOperand Chain = Op.getOperand(0); // Legalize the chain.
856 SDOperand Size = Op.getOperand(1); // Legalize the size.
858 unsigned SPReg = SP::O6;
859 SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, MVT::i32);
860 SDOperand NewSP = DAG.getNode(ISD::SUB, MVT::i32, SP, Size); // Value
861 Chain = DAG.getCopyToReg(SP.getValue(1), SPReg, NewSP); // Output chain
863 // The resultant pointer is actually 16 words from the bottom of the stack,
864 // to provide a register spill area.
865 SDOperand NewVal = DAG.getNode(ISD::ADD, MVT::i32, NewSP,
866 DAG.getConstant(96, MVT::i32));
867 std::vector<MVT::ValueType> Tys;
868 Tys.push_back(MVT::i32);
869 Tys.push_back(MVT::Other);
870 SDOperand Ops[2] = { NewVal, Chain };
871 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
876 switch(Op.getNumOperands()) {
878 assert(0 && "Do not know how to return this many arguments!");
881 return SDOperand(); // ret void is legal
884 switch(Op.getOperand(1).getValueType()) {
885 default: assert(0 && "Unknown type to return!");
886 case MVT::i32: ArgReg = SP::I0; break;
887 case MVT::f32: ArgReg = SP::F0; break;
888 case MVT::f64: ArgReg = SP::D0; break;
890 Copy = DAG.getCopyToReg(Op.getOperand(0), ArgReg, Op.getOperand(1),
895 Copy = DAG.getCopyToReg(Op.getOperand(0), SP::I0, Op.getOperand(3),
897 Copy = DAG.getCopyToReg(Copy, SP::I1, Op.getOperand(1), Copy.getValue(1));
900 return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
902 // Frame & Return address. Currently unimplemented
903 case ISD::RETURNADDR: break;
904 case ISD::FRAMEADDR: break;
910 SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
911 MachineBasicBlock *BB) {
912 const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
915 // Figure out the conditional branch opcode to use for this select_cc.
916 switch (MI->getOpcode()) {
917 default: assert(0 && "Unknown SELECT_CC!");
918 case SP::SELECT_CC_Int_ICC:
919 case SP::SELECT_CC_FP_ICC:
920 case SP::SELECT_CC_DFP_ICC:
921 BROpcode = SP::BCOND;
923 case SP::SELECT_CC_Int_FCC:
924 case SP::SELECT_CC_FP_FCC:
925 case SP::SELECT_CC_DFP_FCC:
926 BROpcode = SP::FBCOND;
930 CC = (SPCC::CondCodes)MI->getOperand(3).getImm();
932 // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
933 // control-flow pattern. The incoming instruction knows the destination vreg
934 // to set, the condition code register to branch on, the true/false values to
935 // select between, and a branch opcode to use.
936 const BasicBlock *LLVM_BB = BB->getBasicBlock();
937 ilist<MachineBasicBlock>::iterator It = BB;
944 // fallthrough --> copy0MBB
945 MachineBasicBlock *thisMBB = BB;
946 MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
947 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
948 BuildMI(BB, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
949 MachineFunction *F = BB->getParent();
950 F->getBasicBlockList().insert(It, copy0MBB);
951 F->getBasicBlockList().insert(It, sinkMBB);
952 // Update machine-CFG edges by first adding all successors of the current
953 // block to the new block which will contain the Phi node for the select.
954 for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
955 e = BB->succ_end(); i != e; ++i)
956 sinkMBB->addSuccessor(*i);
957 // Next, remove all successors of the current block, and add the true
958 // and fallthrough blocks as its successors.
959 while(!BB->succ_empty())
960 BB->removeSuccessor(BB->succ_begin());
961 BB->addSuccessor(copy0MBB);
962 BB->addSuccessor(sinkMBB);
966 // # fallthrough to sinkMBB
969 // Update machine-CFG edges
970 BB->addSuccessor(sinkMBB);
973 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
976 BuildMI(BB, TII.get(SP::PHI), MI->getOperand(0).getReg())
977 .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
978 .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
980 delete MI; // The pseudo instruction is gone now.
984 //===----------------------------------------------------------------------===//
985 // Instruction Selector Implementation
986 //===----------------------------------------------------------------------===//
988 //===--------------------------------------------------------------------===//
989 /// SparcDAGToDAGISel - SPARC specific code to select SPARC machine
990 /// instructions for SelectionDAG operations.
993 class SparcDAGToDAGISel : public SelectionDAGISel {
994 SparcTargetLowering Lowering;
996 /// Subtarget - Keep a pointer to the Sparc Subtarget around so that we can
997 /// make the right decision when generating code for different targets.
998 const SparcSubtarget &Subtarget;
1000 SparcDAGToDAGISel(TargetMachine &TM)
1001 : SelectionDAGISel(Lowering), Lowering(TM),
1002 Subtarget(TM.getSubtarget<SparcSubtarget>()) {
1005 SDNode *Select(SDOperand Op);
1007 // Complex Pattern Selectors.
1008 bool SelectADDRrr(SDOperand Op, SDOperand N, SDOperand &R1, SDOperand &R2);
1009 bool SelectADDRri(SDOperand Op, SDOperand N, SDOperand &Base,
1012 /// InstructionSelectBasicBlock - This callback is invoked by
1013 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
1014 virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
1016 virtual const char *getPassName() const {
1017 return "SPARC DAG->DAG Pattern Instruction Selection";
1020 // Include the pieces autogenerated from the target description.
1021 #include "SparcGenDAGISel.inc"
1023 } // end anonymous namespace
1025 /// InstructionSelectBasicBlock - This callback is invoked by
1026 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
1027 void SparcDAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
1030 // Select target instructions for the DAG.
1031 DAG.setRoot(SelectRoot(DAG.getRoot()));
1032 DAG.RemoveDeadNodes();
1034 // Emit machine code to BB.
1035 ScheduleAndEmitDAG(DAG);
1038 bool SparcDAGToDAGISel::SelectADDRri(SDOperand Op, SDOperand Addr,
1039 SDOperand &Base, SDOperand &Offset) {
1040 if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
1041 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1042 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1045 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1046 Addr.getOpcode() == ISD::TargetGlobalAddress)
1047 return false; // direct calls.
1049 if (Addr.getOpcode() == ISD::ADD) {
1050 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1))) {
1051 if (Predicate_simm13(CN)) {
1052 if (FrameIndexSDNode *FIN =
1053 dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
1054 // Constant offset from frame ref.
1055 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1057 Base = Addr.getOperand(0);
1059 Offset = CurDAG->getTargetConstant(CN->getValue(), MVT::i32);
1063 if (Addr.getOperand(0).getOpcode() == SPISD::Lo) {
1064 Base = Addr.getOperand(1);
1065 Offset = Addr.getOperand(0).getOperand(0);
1068 if (Addr.getOperand(1).getOpcode() == SPISD::Lo) {
1069 Base = Addr.getOperand(0);
1070 Offset = Addr.getOperand(1).getOperand(0);
1075 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1079 bool SparcDAGToDAGISel::SelectADDRrr(SDOperand Op, SDOperand Addr,
1080 SDOperand &R1, SDOperand &R2) {
1081 if (Addr.getOpcode() == ISD::FrameIndex) return false;
1082 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1083 Addr.getOpcode() == ISD::TargetGlobalAddress)
1084 return false; // direct calls.
1086 if (Addr.getOpcode() == ISD::ADD) {
1087 if (isa<ConstantSDNode>(Addr.getOperand(1)) &&
1088 Predicate_simm13(Addr.getOperand(1).Val))
1089 return false; // Let the reg+imm pattern catch this!
1090 if (Addr.getOperand(0).getOpcode() == SPISD::Lo ||
1091 Addr.getOperand(1).getOpcode() == SPISD::Lo)
1092 return false; // Let the reg+imm pattern catch this!
1093 R1 = Addr.getOperand(0);
1094 R2 = Addr.getOperand(1);
1099 R2 = CurDAG->getRegister(SP::G0, MVT::i32);
1103 SDNode *SparcDAGToDAGISel::Select(SDOperand Op) {
1105 if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
1106 N->getOpcode() < SPISD::FIRST_NUMBER)
1107 return NULL; // Already selected.
1109 switch (N->getOpcode()) {
1113 // FIXME: should use a custom expander to expose the SRA to the dag.
1114 SDOperand DivLHS = N->getOperand(0);
1115 SDOperand DivRHS = N->getOperand(1);
1116 AddToISelQueue(DivLHS);
1117 AddToISelQueue(DivRHS);
1119 // Set the Y register to the high-part.
1121 if (N->getOpcode() == ISD::SDIV) {
1122 TopPart = SDOperand(CurDAG->getTargetNode(SP::SRAri, MVT::i32, DivLHS,
1123 CurDAG->getTargetConstant(31, MVT::i32)), 0);
1125 TopPart = CurDAG->getRegister(SP::G0, MVT::i32);
1127 TopPart = SDOperand(CurDAG->getTargetNode(SP::WRYrr, MVT::Flag, TopPart,
1128 CurDAG->getRegister(SP::G0, MVT::i32)), 0);
1130 // FIXME: Handle div by immediate.
1131 unsigned Opcode = N->getOpcode() == ISD::SDIV ? SP::SDIVrr : SP::UDIVrr;
1132 return CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS,
1137 // FIXME: Handle mul by immediate.
1138 SDOperand MulLHS = N->getOperand(0);
1139 SDOperand MulRHS = N->getOperand(1);
1140 AddToISelQueue(MulLHS);
1141 AddToISelQueue(MulRHS);
1142 unsigned Opcode = N->getOpcode() == ISD::MULHU ? SP::UMULrr : SP::SMULrr;
1143 SDNode *Mul = CurDAG->getTargetNode(Opcode, MVT::i32, MVT::Flag,
1145 // The high part is in the Y register.
1146 return CurDAG->SelectNodeTo(N, SP::RDY, MVT::i32, SDOperand(Mul, 1));
1151 return SelectCode(Op);
1155 /// createSparcISelDag - This pass converts a legalized DAG into a
1156 /// SPARC-specific DAG, ready for instruction scheduling.
1158 FunctionPass *llvm::createSparcISelDag(TargetMachine &TM) {
1159 return new SparcDAGToDAGISel(TM);