1 //===-- SparcISelDAGToDAG.cpp - A dag to dag inst selector for Sparc ------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source 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/SelectionDAG.h"
23 #include "llvm/CodeGen/SelectionDAGISel.h"
24 #include "llvm/CodeGen/SSARegMap.h"
25 #include "llvm/Target/TargetLowering.h"
26 #include "llvm/Support/Debug.h"
31 //===----------------------------------------------------------------------===//
32 // TargetLowering Implementation
33 //===----------------------------------------------------------------------===//
37 FIRST_NUMBER = ISD::BUILTIN_OP_END+SP::INSTRUCTION_LIST_END,
38 CMPICC, // Compare two GPR operands, set icc.
39 CMPFCC, // Compare two FP operands, set fcc.
40 BRICC, // Branch to dest on icc condition
41 BRFCC, // Branch to dest on fcc condition
42 SELECT_ICC, // Select between two values using the current ICC flags.
43 SELECT_FCC, // Select between two values using the current FCC flags.
45 Hi, Lo, // Hi/Lo operations, typically on a global address.
47 FTOI, // FP to Int within a FP register.
48 ITOF, // Int to FP within a FP register.
50 CALL, // A call instruction.
51 RET_FLAG // Return with a flag operand.
55 /// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
57 static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
59 default: assert(0 && "Unknown integer condition code!");
60 case ISD::SETEQ: return SPCC::ICC_E;
61 case ISD::SETNE: return SPCC::ICC_NE;
62 case ISD::SETLT: return SPCC::ICC_L;
63 case ISD::SETGT: return SPCC::ICC_G;
64 case ISD::SETLE: return SPCC::ICC_LE;
65 case ISD::SETGE: return SPCC::ICC_GE;
66 case ISD::SETULT: return SPCC::ICC_CS;
67 case ISD::SETULE: return SPCC::ICC_LEU;
68 case ISD::SETUGT: return SPCC::ICC_GU;
69 case ISD::SETUGE: return SPCC::ICC_CC;
73 /// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
75 static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
77 default: assert(0 && "Unknown fp condition code!");
79 case ISD::SETOEQ: return SPCC::FCC_E;
81 case ISD::SETUNE: return SPCC::FCC_NE;
83 case ISD::SETOLT: return SPCC::FCC_L;
85 case ISD::SETOGT: return SPCC::FCC_G;
87 case ISD::SETOLE: return SPCC::FCC_LE;
89 case ISD::SETOGE: return SPCC::FCC_GE;
90 case ISD::SETULT: return SPCC::FCC_UL;
91 case ISD::SETULE: return SPCC::FCC_ULE;
92 case ISD::SETUGT: return SPCC::FCC_UG;
93 case ISD::SETUGE: return SPCC::FCC_UGE;
94 case ISD::SETUO: return SPCC::FCC_U;
95 case ISD::SETO: return SPCC::FCC_O;
96 case ISD::SETONE: return SPCC::FCC_LG;
97 case ISD::SETUEQ: return SPCC::FCC_UE;
102 class SparcTargetLowering : public TargetLowering {
103 int VarArgsFrameOffset; // Frame offset to start of varargs area.
105 SparcTargetLowering(TargetMachine &TM);
106 virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
108 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
109 /// in Mask are known to be either zero or one and return them in the
110 /// KnownZero/KnownOne bitsets.
111 virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
115 const SelectionDAG &DAG,
116 unsigned Depth = 0) const;
118 virtual std::vector<SDOperand>
119 LowerArguments(Function &F, SelectionDAG &DAG);
120 virtual std::pair<SDOperand, SDOperand>
121 LowerCallTo(SDOperand Chain, const Type *RetTy, bool RetTyIsSigned,
122 bool isVarArg, unsigned CC, bool isTailCall, SDOperand Callee,
123 ArgListTy &Args, SelectionDAG &DAG);
124 virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
125 MachineBasicBlock *MBB);
127 virtual const char *getTargetNodeName(unsigned Opcode) const;
131 SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
132 : TargetLowering(TM) {
134 // Set up the register classes.
135 addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
136 addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
137 addRegisterClass(MVT::f64, SP::DFPRegsRegisterClass);
139 // Turn FP extload into load/fextend
140 setLoadXAction(ISD::EXTLOAD, MVT::f32, Expand);
142 // Custom legalize GlobalAddress nodes into LO/HI parts.
143 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
144 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
145 setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
147 // Sparc doesn't have sext_inreg, replace them with shl/sra
148 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
149 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
150 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
152 // Sparc has no REM operation.
153 setOperationAction(ISD::UREM, MVT::i32, Expand);
154 setOperationAction(ISD::SREM, MVT::i32, Expand);
156 // Custom expand fp<->sint
157 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
158 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
161 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
162 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
164 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
165 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
167 // Sparc has no select or setcc: expand to SELECT_CC.
168 setOperationAction(ISD::SELECT, MVT::i32, Expand);
169 setOperationAction(ISD::SELECT, MVT::f32, Expand);
170 setOperationAction(ISD::SELECT, MVT::f64, Expand);
171 setOperationAction(ISD::SETCC, MVT::i32, Expand);
172 setOperationAction(ISD::SETCC, MVT::f32, Expand);
173 setOperationAction(ISD::SETCC, MVT::f64, Expand);
175 // Sparc doesn't have BRCOND either, it has BR_CC.
176 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
177 setOperationAction(ISD::BRIND, MVT::Other, Expand);
178 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
179 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
180 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
181 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
183 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
184 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
185 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
187 // SPARC has no intrinsics for these particular operations.
188 setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
189 setOperationAction(ISD::MEMSET, MVT::Other, Expand);
190 setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
192 setOperationAction(ISD::FSIN , MVT::f64, Expand);
193 setOperationAction(ISD::FCOS , MVT::f64, Expand);
194 setOperationAction(ISD::FREM , MVT::f64, Expand);
195 setOperationAction(ISD::FSIN , MVT::f32, Expand);
196 setOperationAction(ISD::FCOS , MVT::f32, Expand);
197 setOperationAction(ISD::FREM , MVT::f32, Expand);
198 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
199 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
200 setOperationAction(ISD::CTLZ , MVT::i32, Expand);
201 setOperationAction(ISD::ROTL , MVT::i32, Expand);
202 setOperationAction(ISD::ROTR , MVT::i32, Expand);
203 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
204 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
205 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
207 setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
208 setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
209 setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
211 // We don't have line number support yet.
212 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
213 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
214 setOperationAction(ISD::LABEL, MVT::Other, Expand);
216 // RET must be custom lowered, to meet ABI requirements
217 setOperationAction(ISD::RET , MVT::Other, Custom);
219 setOperationAction(ISD::ADJUST_TRAMP, MVT::i32, Expand);
221 // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
222 setOperationAction(ISD::VASTART , MVT::Other, Custom);
223 // VAARG needs to be lowered to not do unaligned accesses for doubles.
224 setOperationAction(ISD::VAARG , MVT::Other, Custom);
226 // Use the default implementation.
227 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
228 setOperationAction(ISD::VAEND , MVT::Other, Expand);
229 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
230 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
231 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
233 setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
234 setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
236 setStackPointerRegisterToSaveRestore(SP::O6);
238 if (TM.getSubtarget<SparcSubtarget>().isV9()) {
239 setOperationAction(ISD::CTPOP, MVT::i32, Legal);
242 computeRegisterProperties();
245 const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
248 case SPISD::CMPICC: return "SPISD::CMPICC";
249 case SPISD::CMPFCC: return "SPISD::CMPFCC";
250 case SPISD::BRICC: return "SPISD::BRICC";
251 case SPISD::BRFCC: return "SPISD::BRFCC";
252 case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
253 case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
254 case SPISD::Hi: return "SPISD::Hi";
255 case SPISD::Lo: return "SPISD::Lo";
256 case SPISD::FTOI: return "SPISD::FTOI";
257 case SPISD::ITOF: return "SPISD::ITOF";
258 case SPISD::CALL: return "SPISD::CALL";
259 case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
263 /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
264 /// be zero. Op is expected to be a target specific node. Used by DAG
266 void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
270 const SelectionDAG &DAG,
271 unsigned Depth) const {
272 uint64_t KnownZero2, KnownOne2;
273 KnownZero = KnownOne = 0; // Don't know anything.
275 switch (Op.getOpcode()) {
277 case SPISD::SELECT_ICC:
278 case SPISD::SELECT_FCC:
279 DAG.ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne,
281 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2,
283 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
284 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
286 // Only known if known in both the LHS and RHS.
287 KnownOne &= KnownOne2;
288 KnownZero &= KnownZero2;
293 /// LowerArguments - V8 uses a very simple ABI, where all values are passed in
294 /// either one or two GPRs, including FP values. TODO: we should pass FP values
295 /// in FP registers for fastcc functions.
296 std::vector<SDOperand>
297 SparcTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
298 MachineFunction &MF = DAG.getMachineFunction();
299 SSARegMap *RegMap = MF.getSSARegMap();
300 std::vector<SDOperand> ArgValues;
302 static const unsigned ArgRegs[] = {
303 SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
306 const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
307 unsigned ArgOffset = 68;
309 SDOperand Root = DAG.getRoot();
310 std::vector<SDOperand> OutChains;
312 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
313 MVT::ValueType ObjectVT = getValueType(I->getType());
316 default: assert(0 && "Unhandled argument type!");
321 if (I->use_empty()) { // Argument is dead.
322 if (CurArgReg < ArgRegEnd) ++CurArgReg;
323 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
324 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
325 unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
326 MF.addLiveIn(*CurArgReg++, VReg);
327 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
328 if (ObjectVT != MVT::i32) {
329 unsigned AssertOp = ISD::AssertSext;
330 Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
331 DAG.getValueType(ObjectVT));
332 Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
334 ArgValues.push_back(Arg);
336 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
337 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
339 if (ObjectVT == MVT::i32) {
340 Load = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
342 ISD::LoadExtType LoadOp = ISD::SEXTLOAD;
344 // Sparc is big endian, so add an offset based on the ObjectVT.
345 unsigned Offset = 4-std::max(1U, MVT::getSizeInBits(ObjectVT)/8);
346 FIPtr = DAG.getNode(ISD::ADD, MVT::i32, FIPtr,
347 DAG.getConstant(Offset, MVT::i32));
348 Load = DAG.getExtLoad(LoadOp, MVT::i32, Root, FIPtr,
350 Load = DAG.getNode(ISD::TRUNCATE, ObjectVT, Load);
352 ArgValues.push_back(Load);
358 if (I->use_empty()) { // Argument is dead.
359 if (CurArgReg < ArgRegEnd) ++CurArgReg;
360 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
361 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
362 // FP value is passed in an integer register.
363 unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
364 MF.addLiveIn(*CurArgReg++, VReg);
365 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
367 Arg = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Arg);
368 ArgValues.push_back(Arg);
370 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
371 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
372 SDOperand Load = DAG.getLoad(MVT::f32, Root, FIPtr, NULL, 0);
373 ArgValues.push_back(Load);
380 if (I->use_empty()) { // Argument is dead.
381 if (CurArgReg < ArgRegEnd) ++CurArgReg;
382 if (CurArgReg < ArgRegEnd) ++CurArgReg;
383 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
384 } else if (/* FIXME: Apparently this isn't safe?? */
385 0 && CurArgReg == ArgRegEnd && ObjectVT == MVT::f64 &&
386 ((CurArgReg-ArgRegs) & 1) == 0) {
387 // If this is a double argument and the whole thing lives on the stack,
388 // and the argument is aligned, load the double straight from the stack.
389 // We can't do a load in cases like void foo([6ints], int,double),
390 // because the double wouldn't be aligned!
391 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(8, ArgOffset);
392 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
393 ArgValues.push_back(DAG.getLoad(MVT::f64, Root, FIPtr, NULL, 0));
396 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
397 unsigned VRegHi = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
398 MF.addLiveIn(*CurArgReg++, VRegHi);
399 HiVal = DAG.getCopyFromReg(Root, VRegHi, MVT::i32);
401 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
402 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
403 HiVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
407 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
408 unsigned VRegLo = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
409 MF.addLiveIn(*CurArgReg++, VRegLo);
410 LoVal = DAG.getCopyFromReg(Root, VRegLo, MVT::i32);
412 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4);
413 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
414 LoVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
417 // Compose the two halves together into an i64 unit.
418 SDOperand WholeValue =
419 DAG.getNode(ISD::BUILD_PAIR, MVT::i64, LoVal, HiVal);
421 // If we want a double, do a bit convert.
422 if (ObjectVT == MVT::f64)
423 WholeValue = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, WholeValue);
425 ArgValues.push_back(WholeValue);
432 // Store remaining ArgRegs to the stack if this is a varargs function.
433 if (F.getFunctionType()->isVarArg()) {
434 // Remember the vararg offset for the va_start implementation.
435 VarArgsFrameOffset = ArgOffset;
437 for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
438 unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
439 MF.addLiveIn(*CurArgReg, VReg);
440 SDOperand Arg = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
442 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
443 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
445 OutChains.push_back(DAG.getStore(DAG.getRoot(), Arg, FIPtr, NULL, 0));
450 if (!OutChains.empty())
451 DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other,
452 &OutChains[0], OutChains.size()));
454 // Finally, inform the code generator which regs we return values in.
455 switch (getValueType(F.getReturnType())) {
456 default: assert(0 && "Unknown type!");
457 case MVT::isVoid: break;
462 MF.addLiveOut(SP::I0);
465 MF.addLiveOut(SP::I0);
466 MF.addLiveOut(SP::I1);
469 MF.addLiveOut(SP::F0);
472 MF.addLiveOut(SP::D0);
479 std::pair<SDOperand, SDOperand>
480 SparcTargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
481 bool RetTyIsSigned, bool isVarArg, unsigned CC,
482 bool isTailCall, SDOperand Callee,
483 ArgListTy &Args, SelectionDAG &DAG) {
484 // Count the size of the outgoing arguments.
485 unsigned ArgsSize = 0;
486 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
487 switch (getValueType(Args[i].Ty)) {
488 default: assert(0 && "Unknown value type!");
503 ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
507 // Keep stack frames 8-byte aligned.
508 ArgsSize = (ArgsSize+7) & ~7;
510 Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(ArgsSize, getPointerTy()));
513 std::vector<SDOperand> Stores;
514 std::vector<SDOperand> RegValuesToPass;
515 unsigned ArgOffset = 68;
516 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
517 SDOperand Val = Args[i].Node;
518 MVT::ValueType ObjectVT = Val.getValueType();
519 SDOperand ValToStore(0, 0);
522 default: assert(0 && "Unhandled argument type!");
526 // Promote the integer to 32-bits. If the input type is signed, use a
527 // sign extend, otherwise use a zero extend.
528 ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
530 ExtendKind = ISD::SIGN_EXTEND;
531 else if (Args[i].isZExt)
532 ExtendKind = ISD::ZERO_EXTEND;
533 Val = DAG.getNode(ExtendKind, MVT::i32, Val);
539 if (RegValuesToPass.size() >= 6) {
542 RegValuesToPass.push_back(Val);
547 if (RegValuesToPass.size() >= 6) {
550 // Convert this to a FP value in an int reg.
551 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Val);
552 RegValuesToPass.push_back(Val);
557 // If we can store this directly into the outgoing slot, do so. We can
558 // do this when all ArgRegs are used and if the outgoing slot is aligned.
559 // FIXME: McGill/misr fails with this.
560 if (0 && RegValuesToPass.size() >= 6 && ((ArgOffset-68) & 7) == 0) {
565 // Otherwise, convert this to a FP value in int regs.
566 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i64, Val);
570 if (RegValuesToPass.size() >= 6) {
571 ValToStore = Val; // Whole thing is passed in memory.
575 // Split the value into top and bottom part. Top part goes in a reg.
576 SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
577 DAG.getConstant(1, MVT::i32));
578 SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
579 DAG.getConstant(0, MVT::i32));
580 RegValuesToPass.push_back(Hi);
582 if (RegValuesToPass.size() >= 6) {
587 RegValuesToPass.push_back(Lo);
592 if (ValToStore.Val) {
594 StackPtr = DAG.getRegister(SP::O6, MVT::i32);
596 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
597 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
598 Stores.push_back(DAG.getStore(Chain, ValToStore, PtrOff, NULL, 0));
600 ArgOffset += ObjSize;
603 // Emit all stores, make sure the occur before any copies into physregs.
605 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Stores[0],Stores.size());
607 static const unsigned ArgRegs[] = {
608 SP::O0, SP::O1, SP::O2, SP::O3, SP::O4, SP::O5
611 // Build a sequence of copy-to-reg nodes chained together with token chain
612 // and flag operands which copy the outgoing args into O[0-5].
614 for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
615 Chain = DAG.getCopyToReg(Chain, ArgRegs[i], RegValuesToPass[i], InFlag);
616 InFlag = Chain.getValue(1);
619 // If the callee is a GlobalAddress node (quite common, every direct call is)
620 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
621 // Likewise ExternalSymbol -> TargetExternalSymbol.
622 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
623 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i32);
624 else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
625 Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
627 std::vector<MVT::ValueType> NodeTys;
628 NodeTys.push_back(MVT::Other); // Returns a chain
629 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
630 SDOperand Ops[] = { Chain, Callee, InFlag };
631 Chain = DAG.getNode(SPISD::CALL, NodeTys, Ops, InFlag.Val ? 3 : 2);
632 InFlag = Chain.getValue(1);
634 MVT::ValueType RetTyVT = getValueType(RetTy);
636 if (RetTyVT != MVT::isVoid) {
638 default: assert(0 && "Unknown value type to return!");
642 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
643 Chain = RetVal.getValue(1);
645 // Add a note to keep track of whether it is sign or zero extended.
646 ISD::NodeType AssertKind = ISD::AssertZext;
648 AssertKind = ISD::AssertSext;
649 RetVal = DAG.getNode(AssertKind, MVT::i32, RetVal,
650 DAG.getValueType(RetTyVT));
651 RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
655 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
656 Chain = RetVal.getValue(1);
659 RetVal = DAG.getCopyFromReg(Chain, SP::F0, MVT::f32, InFlag);
660 Chain = RetVal.getValue(1);
663 RetVal = DAG.getCopyFromReg(Chain, SP::D0, MVT::f64, InFlag);
664 Chain = RetVal.getValue(1);
667 SDOperand Lo = DAG.getCopyFromReg(Chain, SP::O1, MVT::i32, InFlag);
668 SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), SP::O0, MVT::i32,
670 RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
671 Chain = Hi.getValue(1);
676 Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
677 DAG.getConstant(ArgsSize, getPointerTy()));
679 return std::make_pair(RetVal, Chain);
682 // Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
683 // set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
684 static void LookThroughSetCC(SDOperand &LHS, SDOperand &RHS,
685 ISD::CondCode CC, unsigned &SPCC) {
686 if (isa<ConstantSDNode>(RHS) && cast<ConstantSDNode>(RHS)->getValue() == 0 &&
688 ((LHS.getOpcode() == SPISD::SELECT_ICC &&
689 LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
690 (LHS.getOpcode() == SPISD::SELECT_FCC &&
691 LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
692 isa<ConstantSDNode>(LHS.getOperand(0)) &&
693 isa<ConstantSDNode>(LHS.getOperand(1)) &&
694 cast<ConstantSDNode>(LHS.getOperand(0))->getValue() == 1 &&
695 cast<ConstantSDNode>(LHS.getOperand(1))->getValue() == 0) {
696 SDOperand CMPCC = LHS.getOperand(3);
697 SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getValue();
698 LHS = CMPCC.getOperand(0);
699 RHS = CMPCC.getOperand(1);
704 SDOperand SparcTargetLowering::
705 LowerOperation(SDOperand Op, SelectionDAG &DAG) {
706 switch (Op.getOpcode()) {
707 default: assert(0 && "Should not custom lower this!");
708 case ISD::GlobalTLSAddress:
709 assert(0 && "TLS not implemented for Sparc.");
710 case ISD::GlobalAddress: {
711 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
712 SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
713 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, GA);
714 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, GA);
715 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
717 case ISD::ConstantPool: {
718 Constant *C = cast<ConstantPoolSDNode>(Op)->getConstVal();
719 SDOperand CP = DAG.getTargetConstantPool(C, MVT::i32,
720 cast<ConstantPoolSDNode>(Op)->getAlignment());
721 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, CP);
722 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, CP);
723 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
725 case ISD::FP_TO_SINT:
726 // Convert the fp value to integer in an FP register.
727 assert(Op.getValueType() == MVT::i32);
728 Op = DAG.getNode(SPISD::FTOI, MVT::f32, Op.getOperand(0));
729 return DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Op);
730 case ISD::SINT_TO_FP: {
731 assert(Op.getOperand(0).getValueType() == MVT::i32);
732 SDOperand Tmp = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Op.getOperand(0));
733 // Convert the int value to FP in an FP register.
734 return DAG.getNode(SPISD::ITOF, Op.getValueType(), Tmp);
737 SDOperand Chain = Op.getOperand(0);
738 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
739 SDOperand LHS = Op.getOperand(2);
740 SDOperand RHS = Op.getOperand(3);
741 SDOperand Dest = Op.getOperand(4);
742 unsigned Opc, SPCC = ~0U;
744 // If this is a br_cc of a "setcc", and if the setcc got lowered into
745 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
746 LookThroughSetCC(LHS, RHS, CC, SPCC);
748 // Get the condition flag.
749 SDOperand CompareFlag;
750 if (LHS.getValueType() == MVT::i32) {
751 std::vector<MVT::ValueType> VTs;
752 VTs.push_back(MVT::i32);
753 VTs.push_back(MVT::Flag);
754 SDOperand Ops[2] = { LHS, RHS };
755 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
756 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
759 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
760 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
763 return DAG.getNode(Opc, MVT::Other, Chain, Dest,
764 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
766 case ISD::SELECT_CC: {
767 SDOperand LHS = Op.getOperand(0);
768 SDOperand RHS = Op.getOperand(1);
769 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
770 SDOperand TrueVal = Op.getOperand(2);
771 SDOperand FalseVal = Op.getOperand(3);
772 unsigned Opc, SPCC = ~0U;
774 // If this is a select_cc of a "setcc", and if the setcc got lowered into
775 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
776 LookThroughSetCC(LHS, RHS, CC, SPCC);
778 SDOperand CompareFlag;
779 if (LHS.getValueType() == MVT::i32) {
780 std::vector<MVT::ValueType> VTs;
781 VTs.push_back(LHS.getValueType()); // subcc returns a value
782 VTs.push_back(MVT::Flag);
783 SDOperand Ops[2] = { LHS, RHS };
784 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
785 Opc = SPISD::SELECT_ICC;
786 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
788 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
789 Opc = SPISD::SELECT_FCC;
790 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
792 return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
793 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
796 // vastart just stores the address of the VarArgsFrameIndex slot into the
797 // memory location argument.
798 SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
799 DAG.getRegister(SP::I6, MVT::i32),
800 DAG.getConstant(VarArgsFrameOffset, MVT::i32));
801 SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
802 return DAG.getStore(Op.getOperand(0), Offset,
803 Op.getOperand(1), SV->getValue(), SV->getOffset());
806 SDNode *Node = Op.Val;
807 MVT::ValueType VT = Node->getValueType(0);
808 SDOperand InChain = Node->getOperand(0);
809 SDOperand VAListPtr = Node->getOperand(1);
810 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
811 SDOperand VAList = DAG.getLoad(getPointerTy(), InChain, VAListPtr,
812 SV->getValue(), SV->getOffset());
813 // Increment the pointer, VAList, to the next vaarg
814 SDOperand NextPtr = DAG.getNode(ISD::ADD, getPointerTy(), VAList,
815 DAG.getConstant(MVT::getSizeInBits(VT)/8,
817 // Store the incremented VAList to the legalized pointer
818 InChain = DAG.getStore(VAList.getValue(1), NextPtr,
819 VAListPtr, SV->getValue(), SV->getOffset());
820 // Load the actual argument out of the pointer VAList, unless this is an
822 if (VT != MVT::f64) {
823 return DAG.getLoad(VT, InChain, VAList, NULL, 0);
825 // Otherwise, load it as i64, then do a bitconvert.
826 SDOperand V = DAG.getLoad(MVT::i64, InChain, VAList, NULL, 0);
827 std::vector<MVT::ValueType> Tys;
828 Tys.push_back(MVT::f64);
829 Tys.push_back(MVT::Other);
830 // Bit-Convert the value to f64.
831 SDOperand Ops[2] = { DAG.getNode(ISD::BIT_CONVERT, MVT::f64, V),
833 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
836 case ISD::DYNAMIC_STACKALLOC: {
837 SDOperand Chain = Op.getOperand(0); // Legalize the chain.
838 SDOperand Size = Op.getOperand(1); // Legalize the size.
840 unsigned SPReg = SP::O6;
841 SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, MVT::i32);
842 SDOperand NewSP = DAG.getNode(ISD::SUB, MVT::i32, SP, Size); // Value
843 Chain = DAG.getCopyToReg(SP.getValue(1), SPReg, NewSP); // Output chain
845 // The resultant pointer is actually 16 words from the bottom of the stack,
846 // to provide a register spill area.
847 SDOperand NewVal = DAG.getNode(ISD::ADD, MVT::i32, NewSP,
848 DAG.getConstant(96, MVT::i32));
849 std::vector<MVT::ValueType> Tys;
850 Tys.push_back(MVT::i32);
851 Tys.push_back(MVT::Other);
852 SDOperand Ops[2] = { NewVal, Chain };
853 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
858 switch(Op.getNumOperands()) {
860 assert(0 && "Do not know how to return this many arguments!");
863 return SDOperand(); // ret void is legal
866 switch(Op.getOperand(1).getValueType()) {
867 default: assert(0 && "Unknown type to return!");
868 case MVT::i32: ArgReg = SP::I0; break;
869 case MVT::f32: ArgReg = SP::F0; break;
870 case MVT::f64: ArgReg = SP::D0; break;
872 Copy = DAG.getCopyToReg(Op.getOperand(0), ArgReg, Op.getOperand(1),
877 Copy = DAG.getCopyToReg(Op.getOperand(0), SP::I0, Op.getOperand(3),
879 Copy = DAG.getCopyToReg(Copy, SP::I1, Op.getOperand(1), Copy.getValue(1));
882 return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
884 // Frame & Return address. Currently unimplemented
885 case ISD::RETURNADDR: break;
886 case ISD::FRAMEADDR: break;
892 SparcTargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
893 MachineBasicBlock *BB) {
894 const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
897 // Figure out the conditional branch opcode to use for this select_cc.
898 switch (MI->getOpcode()) {
899 default: assert(0 && "Unknown SELECT_CC!");
900 case SP::SELECT_CC_Int_ICC:
901 case SP::SELECT_CC_FP_ICC:
902 case SP::SELECT_CC_DFP_ICC:
903 BROpcode = SP::BCOND;
905 case SP::SELECT_CC_Int_FCC:
906 case SP::SELECT_CC_FP_FCC:
907 case SP::SELECT_CC_DFP_FCC:
908 BROpcode = SP::FBCOND;
912 CC = (SPCC::CondCodes)MI->getOperand(3).getImmedValue();
914 // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
915 // control-flow pattern. The incoming instruction knows the destination vreg
916 // to set, the condition code register to branch on, the true/false values to
917 // select between, and a branch opcode to use.
918 const BasicBlock *LLVM_BB = BB->getBasicBlock();
919 ilist<MachineBasicBlock>::iterator It = BB;
926 // fallthrough --> copy0MBB
927 MachineBasicBlock *thisMBB = BB;
928 MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
929 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
930 BuildMI(BB, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
931 MachineFunction *F = BB->getParent();
932 F->getBasicBlockList().insert(It, copy0MBB);
933 F->getBasicBlockList().insert(It, sinkMBB);
934 // Update machine-CFG edges by first adding all successors of the current
935 // block to the new block which will contain the Phi node for the select.
936 for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
937 e = BB->succ_end(); i != e; ++i)
938 sinkMBB->addSuccessor(*i);
939 // Next, remove all successors of the current block, and add the true
940 // and fallthrough blocks as its successors.
941 while(!BB->succ_empty())
942 BB->removeSuccessor(BB->succ_begin());
943 BB->addSuccessor(copy0MBB);
944 BB->addSuccessor(sinkMBB);
948 // # fallthrough to sinkMBB
951 // Update machine-CFG edges
952 BB->addSuccessor(sinkMBB);
955 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
958 BuildMI(BB, TII.get(SP::PHI), MI->getOperand(0).getReg())
959 .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
960 .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
962 delete MI; // The pseudo instruction is gone now.
966 //===----------------------------------------------------------------------===//
967 // Instruction Selector Implementation
968 //===----------------------------------------------------------------------===//
970 //===--------------------------------------------------------------------===//
971 /// SparcDAGToDAGISel - SPARC specific code to select SPARC machine
972 /// instructions for SelectionDAG operations.
975 class SparcDAGToDAGISel : public SelectionDAGISel {
976 SparcTargetLowering Lowering;
978 /// Subtarget - Keep a pointer to the Sparc Subtarget around so that we can
979 /// make the right decision when generating code for different targets.
980 const SparcSubtarget &Subtarget;
982 SparcDAGToDAGISel(TargetMachine &TM)
983 : SelectionDAGISel(Lowering), Lowering(TM),
984 Subtarget(TM.getSubtarget<SparcSubtarget>()) {
987 SDNode *Select(SDOperand Op);
989 // Complex Pattern Selectors.
990 bool SelectADDRrr(SDOperand Op, SDOperand N, SDOperand &R1, SDOperand &R2);
991 bool SelectADDRri(SDOperand Op, SDOperand N, SDOperand &Base,
994 /// InstructionSelectBasicBlock - This callback is invoked by
995 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
996 virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
998 virtual const char *getPassName() const {
999 return "SPARC DAG->DAG Pattern Instruction Selection";
1002 // Include the pieces autogenerated from the target description.
1003 #include "SparcGenDAGISel.inc"
1005 } // end anonymous namespace
1007 /// InstructionSelectBasicBlock - This callback is invoked by
1008 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
1009 void SparcDAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
1012 // Select target instructions for the DAG.
1013 DAG.setRoot(SelectRoot(DAG.getRoot()));
1014 DAG.RemoveDeadNodes();
1016 // Emit machine code to BB.
1017 ScheduleAndEmitDAG(DAG);
1020 bool SparcDAGToDAGISel::SelectADDRri(SDOperand Op, SDOperand Addr,
1021 SDOperand &Base, SDOperand &Offset) {
1022 if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
1023 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1024 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1027 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1028 Addr.getOpcode() == ISD::TargetGlobalAddress)
1029 return false; // direct calls.
1031 if (Addr.getOpcode() == ISD::ADD) {
1032 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1))) {
1033 if (Predicate_simm13(CN)) {
1034 if (FrameIndexSDNode *FIN =
1035 dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
1036 // Constant offset from frame ref.
1037 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1039 Base = Addr.getOperand(0);
1041 Offset = CurDAG->getTargetConstant(CN->getValue(), MVT::i32);
1045 if (Addr.getOperand(0).getOpcode() == SPISD::Lo) {
1046 Base = Addr.getOperand(1);
1047 Offset = Addr.getOperand(0).getOperand(0);
1050 if (Addr.getOperand(1).getOpcode() == SPISD::Lo) {
1051 Base = Addr.getOperand(0);
1052 Offset = Addr.getOperand(1).getOperand(0);
1057 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1061 bool SparcDAGToDAGISel::SelectADDRrr(SDOperand Op, SDOperand Addr,
1062 SDOperand &R1, SDOperand &R2) {
1063 if (Addr.getOpcode() == ISD::FrameIndex) return false;
1064 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1065 Addr.getOpcode() == ISD::TargetGlobalAddress)
1066 return false; // direct calls.
1068 if (Addr.getOpcode() == ISD::ADD) {
1069 if (isa<ConstantSDNode>(Addr.getOperand(1)) &&
1070 Predicate_simm13(Addr.getOperand(1).Val))
1071 return false; // Let the reg+imm pattern catch this!
1072 if (Addr.getOperand(0).getOpcode() == SPISD::Lo ||
1073 Addr.getOperand(1).getOpcode() == SPISD::Lo)
1074 return false; // Let the reg+imm pattern catch this!
1075 R1 = Addr.getOperand(0);
1076 R2 = Addr.getOperand(1);
1081 R2 = CurDAG->getRegister(SP::G0, MVT::i32);
1085 SDNode *SparcDAGToDAGISel::Select(SDOperand Op) {
1087 if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
1088 N->getOpcode() < SPISD::FIRST_NUMBER)
1089 return NULL; // Already selected.
1091 switch (N->getOpcode()) {
1095 // FIXME: should use a custom expander to expose the SRA to the dag.
1096 SDOperand DivLHS = N->getOperand(0);
1097 SDOperand DivRHS = N->getOperand(1);
1098 AddToISelQueue(DivLHS);
1099 AddToISelQueue(DivRHS);
1101 // Set the Y register to the high-part.
1103 if (N->getOpcode() == ISD::SDIV) {
1104 TopPart = SDOperand(CurDAG->getTargetNode(SP::SRAri, MVT::i32, DivLHS,
1105 CurDAG->getTargetConstant(31, MVT::i32)), 0);
1107 TopPart = CurDAG->getRegister(SP::G0, MVT::i32);
1109 TopPart = SDOperand(CurDAG->getTargetNode(SP::WRYrr, MVT::Flag, TopPart,
1110 CurDAG->getRegister(SP::G0, MVT::i32)), 0);
1112 // FIXME: Handle div by immediate.
1113 unsigned Opcode = N->getOpcode() == ISD::SDIV ? SP::SDIVrr : SP::UDIVrr;
1114 return CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS,
1119 // FIXME: Handle mul by immediate.
1120 SDOperand MulLHS = N->getOperand(0);
1121 SDOperand MulRHS = N->getOperand(1);
1122 AddToISelQueue(MulLHS);
1123 AddToISelQueue(MulRHS);
1124 unsigned Opcode = N->getOpcode() == ISD::MULHU ? SP::UMULrr : SP::SMULrr;
1125 SDNode *Mul = CurDAG->getTargetNode(Opcode, MVT::i32, MVT::Flag,
1127 // The high part is in the Y register.
1128 return CurDAG->SelectNodeTo(N, SP::RDY, MVT::i32, SDOperand(Mul, 1));
1133 return SelectCode(Op);
1137 /// createSparcISelDag - This pass converts a legalized DAG into a
1138 /// SPARC-specific DAG, ready for instruction scheduling.
1140 FunctionPass *llvm::createSparcISelDag(TargetMachine &TM) {
1141 return new SparcDAGToDAGISel(TM);