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/MachineModuleInfo.h"
23 #include "llvm/CodeGen/MachineRegisterInfo.h"
24 #include "llvm/CodeGen/SelectionDAG.h"
25 #include "llvm/CodeGen/SelectionDAGISel.h"
26 #include "llvm/Target/TargetLowering.h"
27 #include "llvm/Support/Compiler.h"
28 #include "llvm/Support/Debug.h"
33 //===----------------------------------------------------------------------===//
34 // TargetLowering Implementation
35 //===----------------------------------------------------------------------===//
39 FIRST_NUMBER = ISD::BUILTIN_OP_END+SP::INSTRUCTION_LIST_END,
40 CMPICC, // Compare two GPR operands, set icc.
41 CMPFCC, // Compare two FP operands, set fcc.
42 BRICC, // Branch to dest on icc condition
43 BRFCC, // Branch to dest on fcc condition
44 SELECT_ICC, // Select between two values using the current ICC flags.
45 SELECT_FCC, // Select between two values using the current FCC flags.
47 Hi, Lo, // Hi/Lo operations, typically on a global address.
49 FTOI, // FP to Int within a FP register.
50 ITOF, // Int to FP within a FP register.
52 CALL, // A call instruction.
53 RET_FLAG // Return with a flag operand.
57 /// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
59 static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
61 default: assert(0 && "Unknown integer condition code!");
62 case ISD::SETEQ: return SPCC::ICC_E;
63 case ISD::SETNE: return SPCC::ICC_NE;
64 case ISD::SETLT: return SPCC::ICC_L;
65 case ISD::SETGT: return SPCC::ICC_G;
66 case ISD::SETLE: return SPCC::ICC_LE;
67 case ISD::SETGE: return SPCC::ICC_GE;
68 case ISD::SETULT: return SPCC::ICC_CS;
69 case ISD::SETULE: return SPCC::ICC_LEU;
70 case ISD::SETUGT: return SPCC::ICC_GU;
71 case ISD::SETUGE: return SPCC::ICC_CC;
75 /// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
77 static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
79 default: assert(0 && "Unknown fp condition code!");
81 case ISD::SETOEQ: return SPCC::FCC_E;
83 case ISD::SETUNE: return SPCC::FCC_NE;
85 case ISD::SETOLT: return SPCC::FCC_L;
87 case ISD::SETOGT: return SPCC::FCC_G;
89 case ISD::SETOLE: return SPCC::FCC_LE;
91 case ISD::SETOGE: return SPCC::FCC_GE;
92 case ISD::SETULT: return SPCC::FCC_UL;
93 case ISD::SETULE: return SPCC::FCC_ULE;
94 case ISD::SETUGT: return SPCC::FCC_UG;
95 case ISD::SETUGE: return SPCC::FCC_UGE;
96 case ISD::SETUO: return SPCC::FCC_U;
97 case ISD::SETO: return SPCC::FCC_O;
98 case ISD::SETONE: return SPCC::FCC_LG;
99 case ISD::SETUEQ: return SPCC::FCC_UE;
104 class SparcTargetLowering : public TargetLowering {
105 int VarArgsFrameOffset; // Frame offset to start of varargs area.
107 SparcTargetLowering(TargetMachine &TM);
108 virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
110 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
111 /// in Mask are known to be either zero or one and return them in the
112 /// KnownZero/KnownOne bitsets.
113 virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
117 const SelectionDAG &DAG,
118 unsigned Depth = 0) const;
120 virtual std::vector<SDOperand>
121 LowerArguments(Function &F, SelectionDAG &DAG);
122 virtual std::pair<SDOperand, SDOperand>
123 LowerCallTo(SDOperand Chain, const Type *RetTy, bool RetTyIsSigned,
124 bool isVarArg, 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);
144 // Sparc doesn't have i1 sign extending load
145 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
147 // Custom legalize GlobalAddress nodes into LO/HI parts.
148 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
149 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
150 setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
152 // Sparc doesn't have sext_inreg, replace them with shl/sra
153 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
154 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
155 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
157 // Sparc has no REM or DIVREM operations.
158 setOperationAction(ISD::UREM, MVT::i32, Expand);
159 setOperationAction(ISD::SREM, MVT::i32, Expand);
160 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
161 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
163 // Custom expand fp<->sint
164 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
165 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
168 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
169 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
171 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
172 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
174 // Sparc has no select or setcc: expand to SELECT_CC.
175 setOperationAction(ISD::SELECT, MVT::i32, Expand);
176 setOperationAction(ISD::SELECT, MVT::f32, Expand);
177 setOperationAction(ISD::SELECT, MVT::f64, Expand);
178 setOperationAction(ISD::SETCC, MVT::i32, Expand);
179 setOperationAction(ISD::SETCC, MVT::f32, Expand);
180 setOperationAction(ISD::SETCC, MVT::f64, Expand);
182 // Sparc doesn't have BRCOND either, it has BR_CC.
183 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
184 setOperationAction(ISD::BRIND, MVT::Other, Expand);
185 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
186 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
187 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
188 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
190 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
191 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
192 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
194 // SPARC has no intrinsics for these particular operations.
195 setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
196 setOperationAction(ISD::MEMSET, MVT::Other, Expand);
197 setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
199 setOperationAction(ISD::FSIN , MVT::f64, Expand);
200 setOperationAction(ISD::FCOS , MVT::f64, Expand);
201 setOperationAction(ISD::FREM , MVT::f64, Expand);
202 setOperationAction(ISD::FSIN , MVT::f32, Expand);
203 setOperationAction(ISD::FCOS , MVT::f32, Expand);
204 setOperationAction(ISD::FREM , MVT::f32, Expand);
205 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
206 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
207 setOperationAction(ISD::CTLZ , MVT::i32, Expand);
208 setOperationAction(ISD::ROTL , MVT::i32, Expand);
209 setOperationAction(ISD::ROTR , MVT::i32, Expand);
210 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
211 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
212 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
213 setOperationAction(ISD::FPOW , MVT::f64, Expand);
214 setOperationAction(ISD::FPOW , MVT::f32, Expand);
216 setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
217 setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
218 setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
220 // We don't have line number support yet.
221 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
222 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
223 setOperationAction(ISD::LABEL, MVT::Other, Expand);
225 // RET must be custom lowered, to meet ABI requirements
226 setOperationAction(ISD::RET , MVT::Other, Custom);
228 // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
229 setOperationAction(ISD::VASTART , MVT::Other, Custom);
230 // VAARG needs to be lowered to not do unaligned accesses for doubles.
231 setOperationAction(ISD::VAARG , MVT::Other, Custom);
233 // Use the default implementation.
234 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
235 setOperationAction(ISD::VAEND , MVT::Other, Expand);
236 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
237 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
238 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
240 setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
241 setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
243 setStackPointerRegisterToSaveRestore(SP::O6);
245 if (TM.getSubtarget<SparcSubtarget>().isV9()) {
246 setOperationAction(ISD::CTPOP, MVT::i32, Legal);
249 computeRegisterProperties();
252 const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
255 case SPISD::CMPICC: return "SPISD::CMPICC";
256 case SPISD::CMPFCC: return "SPISD::CMPFCC";
257 case SPISD::BRICC: return "SPISD::BRICC";
258 case SPISD::BRFCC: return "SPISD::BRFCC";
259 case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
260 case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
261 case SPISD::Hi: return "SPISD::Hi";
262 case SPISD::Lo: return "SPISD::Lo";
263 case SPISD::FTOI: return "SPISD::FTOI";
264 case SPISD::ITOF: return "SPISD::ITOF";
265 case SPISD::CALL: return "SPISD::CALL";
266 case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
270 /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
271 /// be zero. Op is expected to be a target specific node. Used by DAG
273 void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
277 const SelectionDAG &DAG,
278 unsigned Depth) const {
279 uint64_t KnownZero2, KnownOne2;
280 KnownZero = KnownOne = 0; // Don't know anything.
282 switch (Op.getOpcode()) {
284 case SPISD::SELECT_ICC:
285 case SPISD::SELECT_FCC:
286 DAG.ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne,
288 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2,
290 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
291 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
293 // Only known if known in both the LHS and RHS.
294 KnownOne &= KnownOne2;
295 KnownZero &= KnownZero2;
300 /// LowerArguments - V8 uses a very simple ABI, where all values are passed in
301 /// either one or two GPRs, including FP values. TODO: we should pass FP values
302 /// in FP registers for fastcc functions.
303 std::vector<SDOperand>
304 SparcTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
305 MachineFunction &MF = DAG.getMachineFunction();
306 MachineRegisterInfo &RegInfo = MF.getRegInfo();
307 std::vector<SDOperand> ArgValues;
309 static const unsigned ArgRegs[] = {
310 SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
313 const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
314 unsigned ArgOffset = 68;
316 SDOperand Root = DAG.getRoot();
317 std::vector<SDOperand> OutChains;
319 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
320 MVT::ValueType ObjectVT = getValueType(I->getType());
323 default: assert(0 && "Unhandled argument type!");
328 if (I->use_empty()) { // Argument is dead.
329 if (CurArgReg < ArgRegEnd) ++CurArgReg;
330 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
331 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
332 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
333 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
334 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
335 if (ObjectVT != MVT::i32) {
336 unsigned AssertOp = ISD::AssertSext;
337 Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
338 DAG.getValueType(ObjectVT));
339 Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
341 ArgValues.push_back(Arg);
343 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
344 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
346 if (ObjectVT == MVT::i32) {
347 Load = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
349 ISD::LoadExtType LoadOp = ISD::SEXTLOAD;
351 // Sparc is big endian, so add an offset based on the ObjectVT.
352 unsigned Offset = 4-std::max(1U, MVT::getSizeInBits(ObjectVT)/8);
353 FIPtr = DAG.getNode(ISD::ADD, MVT::i32, FIPtr,
354 DAG.getConstant(Offset, MVT::i32));
355 Load = DAG.getExtLoad(LoadOp, MVT::i32, Root, FIPtr,
357 Load = DAG.getNode(ISD::TRUNCATE, ObjectVT, Load);
359 ArgValues.push_back(Load);
365 if (I->use_empty()) { // Argument is dead.
366 if (CurArgReg < ArgRegEnd) ++CurArgReg;
367 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
368 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
369 // FP value is passed in an integer register.
370 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
371 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
372 SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
374 Arg = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Arg);
375 ArgValues.push_back(Arg);
377 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
378 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
379 SDOperand Load = DAG.getLoad(MVT::f32, Root, FIPtr, NULL, 0);
380 ArgValues.push_back(Load);
387 if (I->use_empty()) { // Argument is dead.
388 if (CurArgReg < ArgRegEnd) ++CurArgReg;
389 if (CurArgReg < ArgRegEnd) ++CurArgReg;
390 ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
391 } else if (/* FIXME: Apparently this isn't safe?? */
392 0 && CurArgReg == ArgRegEnd && ObjectVT == MVT::f64 &&
393 ((CurArgReg-ArgRegs) & 1) == 0) {
394 // If this is a double argument and the whole thing lives on the stack,
395 // and the argument is aligned, load the double straight from the stack.
396 // We can't do a load in cases like void foo([6ints], int,double),
397 // because the double wouldn't be aligned!
398 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(8, ArgOffset);
399 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
400 ArgValues.push_back(DAG.getLoad(MVT::f64, Root, FIPtr, NULL, 0));
403 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
404 unsigned VRegHi = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
405 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegHi);
406 HiVal = DAG.getCopyFromReg(Root, VRegHi, MVT::i32);
408 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
409 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
410 HiVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
414 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
415 unsigned VRegLo = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
416 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegLo);
417 LoVal = DAG.getCopyFromReg(Root, VRegLo, MVT::i32);
419 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4);
420 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
421 LoVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
424 // Compose the two halves together into an i64 unit.
425 SDOperand WholeValue =
426 DAG.getNode(ISD::BUILD_PAIR, MVT::i64, LoVal, HiVal);
428 // If we want a double, do a bit convert.
429 if (ObjectVT == MVT::f64)
430 WholeValue = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, WholeValue);
432 ArgValues.push_back(WholeValue);
439 // Store remaining ArgRegs to the stack if this is a varargs function.
440 if (F.getFunctionType()->isVarArg()) {
441 // Remember the vararg offset for the va_start implementation.
442 VarArgsFrameOffset = ArgOffset;
444 for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
445 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
446 MF.getRegInfo().addLiveIn(*CurArgReg, VReg);
447 SDOperand Arg = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
449 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
450 SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
452 OutChains.push_back(DAG.getStore(DAG.getRoot(), Arg, FIPtr, NULL, 0));
457 if (!OutChains.empty())
458 DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other,
459 &OutChains[0], OutChains.size()));
461 // Finally, inform the code generator which regs we return values in.
462 switch (getValueType(F.getReturnType())) {
463 default: assert(0 && "Unknown type!");
464 case MVT::isVoid: break;
469 MF.getRegInfo().addLiveOut(SP::I0);
472 MF.getRegInfo().addLiveOut(SP::I0);
473 MF.getRegInfo().addLiveOut(SP::I1);
476 MF.getRegInfo().addLiveOut(SP::F0);
479 MF.getRegInfo().addLiveOut(SP::D0);
486 std::pair<SDOperand, SDOperand>
487 SparcTargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
488 bool RetTyIsSigned, bool isVarArg, unsigned CC,
489 bool isTailCall, SDOperand Callee,
490 ArgListTy &Args, SelectionDAG &DAG) {
491 // Count the size of the outgoing arguments.
492 unsigned ArgsSize = 0;
493 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
494 switch (getValueType(Args[i].Ty)) {
495 default: assert(0 && "Unknown value type!");
510 ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
514 // Keep stack frames 8-byte aligned.
515 ArgsSize = (ArgsSize+7) & ~7;
517 Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(ArgsSize, getPointerTy()));
520 std::vector<SDOperand> Stores;
521 std::vector<SDOperand> RegValuesToPass;
522 unsigned ArgOffset = 68;
523 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
524 SDOperand Val = Args[i].Node;
525 MVT::ValueType ObjectVT = Val.getValueType();
526 SDOperand ValToStore(0, 0);
529 default: assert(0 && "Unhandled argument type!");
533 // Promote the integer to 32-bits. If the input type is signed, use a
534 // sign extend, otherwise use a zero extend.
535 ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
537 ExtendKind = ISD::SIGN_EXTEND;
538 else if (Args[i].isZExt)
539 ExtendKind = ISD::ZERO_EXTEND;
540 Val = DAG.getNode(ExtendKind, MVT::i32, Val);
546 if (RegValuesToPass.size() >= 6) {
549 RegValuesToPass.push_back(Val);
554 if (RegValuesToPass.size() >= 6) {
557 // Convert this to a FP value in an int reg.
558 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Val);
559 RegValuesToPass.push_back(Val);
564 // If we can store this directly into the outgoing slot, do so. We can
565 // do this when all ArgRegs are used and if the outgoing slot is aligned.
566 // FIXME: McGill/misr fails with this.
567 if (0 && RegValuesToPass.size() >= 6 && ((ArgOffset-68) & 7) == 0) {
572 // Otherwise, convert this to a FP value in int regs.
573 Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i64, Val);
577 if (RegValuesToPass.size() >= 6) {
578 ValToStore = Val; // Whole thing is passed in memory.
582 // Split the value into top and bottom part. Top part goes in a reg.
583 SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
584 DAG.getConstant(1, MVT::i32));
585 SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, getPointerTy(), Val,
586 DAG.getConstant(0, MVT::i32));
587 RegValuesToPass.push_back(Hi);
589 if (RegValuesToPass.size() >= 6) {
594 RegValuesToPass.push_back(Lo);
599 if (ValToStore.Val) {
601 StackPtr = DAG.getRegister(SP::O6, MVT::i32);
603 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
604 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
605 Stores.push_back(DAG.getStore(Chain, ValToStore, PtrOff, NULL, 0));
607 ArgOffset += ObjSize;
610 // Emit all stores, make sure the occur before any copies into physregs.
612 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Stores[0],Stores.size());
614 static const unsigned ArgRegs[] = {
615 SP::O0, SP::O1, SP::O2, SP::O3, SP::O4, SP::O5
618 // Build a sequence of copy-to-reg nodes chained together with token chain
619 // and flag operands which copy the outgoing args into O[0-5].
621 for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
622 Chain = DAG.getCopyToReg(Chain, ArgRegs[i], RegValuesToPass[i], InFlag);
623 InFlag = Chain.getValue(1);
626 // If the callee is a GlobalAddress node (quite common, every direct call is)
627 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
628 // Likewise ExternalSymbol -> TargetExternalSymbol.
629 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
630 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i32);
631 else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
632 Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
634 std::vector<MVT::ValueType> NodeTys;
635 NodeTys.push_back(MVT::Other); // Returns a chain
636 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
637 SDOperand Ops[] = { Chain, Callee, InFlag };
638 Chain = DAG.getNode(SPISD::CALL, NodeTys, Ops, InFlag.Val ? 3 : 2);
639 InFlag = Chain.getValue(1);
641 MVT::ValueType RetTyVT = getValueType(RetTy);
643 if (RetTyVT != MVT::isVoid) {
645 default: assert(0 && "Unknown value type to return!");
649 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
650 Chain = RetVal.getValue(1);
652 // Add a note to keep track of whether it is sign or zero extended.
653 ISD::NodeType AssertKind = ISD::AssertZext;
655 AssertKind = ISD::AssertSext;
656 RetVal = DAG.getNode(AssertKind, MVT::i32, RetVal,
657 DAG.getValueType(RetTyVT));
658 RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
662 RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
663 Chain = RetVal.getValue(1);
666 RetVal = DAG.getCopyFromReg(Chain, SP::F0, MVT::f32, InFlag);
667 Chain = RetVal.getValue(1);
670 RetVal = DAG.getCopyFromReg(Chain, SP::D0, MVT::f64, InFlag);
671 Chain = RetVal.getValue(1);
674 SDOperand Lo = DAG.getCopyFromReg(Chain, SP::O1, MVT::i32, InFlag);
675 SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), SP::O0, MVT::i32,
677 RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
678 Chain = Hi.getValue(1);
683 Chain = DAG.getCALLSEQ_END(Chain,
684 DAG.getConstant(ArgsSize, getPointerTy()),
685 DAG.getConstant(0, getPointerTy()),
687 return std::make_pair(RetVal, Chain);
690 // Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
691 // set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
692 static void LookThroughSetCC(SDOperand &LHS, SDOperand &RHS,
693 ISD::CondCode CC, unsigned &SPCC) {
694 if (isa<ConstantSDNode>(RHS) && cast<ConstantSDNode>(RHS)->getValue() == 0 &&
696 ((LHS.getOpcode() == SPISD::SELECT_ICC &&
697 LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
698 (LHS.getOpcode() == SPISD::SELECT_FCC &&
699 LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
700 isa<ConstantSDNode>(LHS.getOperand(0)) &&
701 isa<ConstantSDNode>(LHS.getOperand(1)) &&
702 cast<ConstantSDNode>(LHS.getOperand(0))->getValue() == 1 &&
703 cast<ConstantSDNode>(LHS.getOperand(1))->getValue() == 0) {
704 SDOperand CMPCC = LHS.getOperand(3);
705 SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getValue();
706 LHS = CMPCC.getOperand(0);
707 RHS = CMPCC.getOperand(1);
712 SDOperand SparcTargetLowering::
713 LowerOperation(SDOperand Op, SelectionDAG &DAG) {
714 switch (Op.getOpcode()) {
715 default: assert(0 && "Should not custom lower this!");
716 case ISD::GlobalTLSAddress:
717 assert(0 && "TLS not implemented for Sparc.");
718 case ISD::GlobalAddress: {
719 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
720 SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
721 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, GA);
722 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, GA);
723 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
725 case ISD::ConstantPool: {
726 Constant *C = cast<ConstantPoolSDNode>(Op)->getConstVal();
727 SDOperand CP = DAG.getTargetConstantPool(C, MVT::i32,
728 cast<ConstantPoolSDNode>(Op)->getAlignment());
729 SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, CP);
730 SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, CP);
731 return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
733 case ISD::FP_TO_SINT:
734 // Convert the fp value to integer in an FP register.
735 assert(Op.getValueType() == MVT::i32);
736 Op = DAG.getNode(SPISD::FTOI, MVT::f32, Op.getOperand(0));
737 return DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Op);
738 case ISD::SINT_TO_FP: {
739 assert(Op.getOperand(0).getValueType() == MVT::i32);
740 SDOperand Tmp = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Op.getOperand(0));
741 // Convert the int value to FP in an FP register.
742 return DAG.getNode(SPISD::ITOF, Op.getValueType(), Tmp);
745 SDOperand Chain = Op.getOperand(0);
746 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
747 SDOperand LHS = Op.getOperand(2);
748 SDOperand RHS = Op.getOperand(3);
749 SDOperand Dest = Op.getOperand(4);
750 unsigned Opc, SPCC = ~0U;
752 // If this is a br_cc of a "setcc", and if the setcc got lowered into
753 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
754 LookThroughSetCC(LHS, RHS, CC, SPCC);
756 // Get the condition flag.
757 SDOperand CompareFlag;
758 if (LHS.getValueType() == MVT::i32) {
759 std::vector<MVT::ValueType> VTs;
760 VTs.push_back(MVT::i32);
761 VTs.push_back(MVT::Flag);
762 SDOperand Ops[2] = { LHS, RHS };
763 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
764 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
767 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
768 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
771 return DAG.getNode(Opc, MVT::Other, Chain, Dest,
772 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
774 case ISD::SELECT_CC: {
775 SDOperand LHS = Op.getOperand(0);
776 SDOperand RHS = Op.getOperand(1);
777 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
778 SDOperand TrueVal = Op.getOperand(2);
779 SDOperand FalseVal = Op.getOperand(3);
780 unsigned Opc, SPCC = ~0U;
782 // If this is a select_cc of a "setcc", and if the setcc got lowered into
783 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
784 LookThroughSetCC(LHS, RHS, CC, SPCC);
786 SDOperand CompareFlag;
787 if (LHS.getValueType() == MVT::i32) {
788 std::vector<MVT::ValueType> VTs;
789 VTs.push_back(LHS.getValueType()); // subcc returns a value
790 VTs.push_back(MVT::Flag);
791 SDOperand Ops[2] = { LHS, RHS };
792 CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops, 2).getValue(1);
793 Opc = SPISD::SELECT_ICC;
794 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
796 CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
797 Opc = SPISD::SELECT_FCC;
798 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
800 return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
801 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
804 // vastart just stores the address of the VarArgsFrameIndex slot into the
805 // memory location argument.
806 SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
807 DAG.getRegister(SP::I6, MVT::i32),
808 DAG.getConstant(VarArgsFrameOffset, MVT::i32));
809 SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
810 return DAG.getStore(Op.getOperand(0), Offset,
811 Op.getOperand(1), SV->getValue(), SV->getOffset());
814 SDNode *Node = Op.Val;
815 MVT::ValueType VT = Node->getValueType(0);
816 SDOperand InChain = Node->getOperand(0);
817 SDOperand VAListPtr = Node->getOperand(1);
818 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
819 SDOperand VAList = DAG.getLoad(getPointerTy(), InChain, VAListPtr,
820 SV->getValue(), SV->getOffset());
821 // Increment the pointer, VAList, to the next vaarg
822 SDOperand NextPtr = DAG.getNode(ISD::ADD, getPointerTy(), VAList,
823 DAG.getConstant(MVT::getSizeInBits(VT)/8,
825 // Store the incremented VAList to the legalized pointer
826 InChain = DAG.getStore(VAList.getValue(1), NextPtr,
827 VAListPtr, SV->getValue(), SV->getOffset());
828 // Load the actual argument out of the pointer VAList, unless this is an
830 if (VT != MVT::f64) {
831 return DAG.getLoad(VT, InChain, VAList, NULL, 0);
833 // Otherwise, load it as i64, then do a bitconvert.
834 SDOperand V = DAG.getLoad(MVT::i64, InChain, VAList, NULL, 0);
835 std::vector<MVT::ValueType> Tys;
836 Tys.push_back(MVT::f64);
837 Tys.push_back(MVT::Other);
838 // Bit-Convert the value to f64.
839 SDOperand Ops[2] = { DAG.getNode(ISD::BIT_CONVERT, MVT::f64, V),
841 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
844 case ISD::DYNAMIC_STACKALLOC: {
845 SDOperand Chain = Op.getOperand(0); // Legalize the chain.
846 SDOperand Size = Op.getOperand(1); // Legalize the size.
848 unsigned SPReg = SP::O6;
849 SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, MVT::i32);
850 SDOperand NewSP = DAG.getNode(ISD::SUB, MVT::i32, SP, Size); // Value
851 Chain = DAG.getCopyToReg(SP.getValue(1), SPReg, NewSP); // Output chain
853 // The resultant pointer is actually 16 words from the bottom of the stack,
854 // to provide a register spill area.
855 SDOperand NewVal = DAG.getNode(ISD::ADD, MVT::i32, NewSP,
856 DAG.getConstant(96, MVT::i32));
857 std::vector<MVT::ValueType> Tys;
858 Tys.push_back(MVT::i32);
859 Tys.push_back(MVT::Other);
860 SDOperand Ops[2] = { NewVal, Chain };
861 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
866 switch(Op.getNumOperands()) {
868 assert(0 && "Do not know how to return this many arguments!");
871 return SDOperand(); // ret void is legal
874 switch(Op.getOperand(1).getValueType()) {
875 default: assert(0 && "Unknown type to return!");
876 case MVT::i32: ArgReg = SP::I0; break;
877 case MVT::f32: ArgReg = SP::F0; break;
878 case MVT::f64: ArgReg = SP::D0; break;
880 Copy = DAG.getCopyToReg(Op.getOperand(0), ArgReg, Op.getOperand(1),
885 Copy = DAG.getCopyToReg(Op.getOperand(0), SP::I0, Op.getOperand(3),
887 Copy = DAG.getCopyToReg(Copy, SP::I1, Op.getOperand(1), Copy.getValue(1));
890 return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
892 // Frame & Return address. Currently unimplemented
893 case ISD::RETURNADDR: break;
894 case ISD::FRAMEADDR: break;
900 SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
901 MachineBasicBlock *BB) {
902 const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
905 // Figure out the conditional branch opcode to use for this select_cc.
906 switch (MI->getOpcode()) {
907 default: assert(0 && "Unknown SELECT_CC!");
908 case SP::SELECT_CC_Int_ICC:
909 case SP::SELECT_CC_FP_ICC:
910 case SP::SELECT_CC_DFP_ICC:
911 BROpcode = SP::BCOND;
913 case SP::SELECT_CC_Int_FCC:
914 case SP::SELECT_CC_FP_FCC:
915 case SP::SELECT_CC_DFP_FCC:
916 BROpcode = SP::FBCOND;
920 CC = (SPCC::CondCodes)MI->getOperand(3).getImm();
922 // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
923 // control-flow pattern. The incoming instruction knows the destination vreg
924 // to set, the condition code register to branch on, the true/false values to
925 // select between, and a branch opcode to use.
926 const BasicBlock *LLVM_BB = BB->getBasicBlock();
927 ilist<MachineBasicBlock>::iterator It = BB;
934 // fallthrough --> copy0MBB
935 MachineBasicBlock *thisMBB = BB;
936 MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
937 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
938 BuildMI(BB, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
939 MachineFunction *F = BB->getParent();
940 F->getBasicBlockList().insert(It, copy0MBB);
941 F->getBasicBlockList().insert(It, sinkMBB);
942 // Update machine-CFG edges by first adding all successors of the current
943 // block to the new block which will contain the Phi node for the select.
944 for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
945 e = BB->succ_end(); i != e; ++i)
946 sinkMBB->addSuccessor(*i);
947 // Next, remove all successors of the current block, and add the true
948 // and fallthrough blocks as its successors.
949 while(!BB->succ_empty())
950 BB->removeSuccessor(BB->succ_begin());
951 BB->addSuccessor(copy0MBB);
952 BB->addSuccessor(sinkMBB);
956 // # fallthrough to sinkMBB
959 // Update machine-CFG edges
960 BB->addSuccessor(sinkMBB);
963 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
966 BuildMI(BB, TII.get(SP::PHI), MI->getOperand(0).getReg())
967 .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
968 .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
970 delete MI; // The pseudo instruction is gone now.
974 //===----------------------------------------------------------------------===//
975 // Instruction Selector Implementation
976 //===----------------------------------------------------------------------===//
978 //===--------------------------------------------------------------------===//
979 /// SparcDAGToDAGISel - SPARC specific code to select SPARC machine
980 /// instructions for SelectionDAG operations.
983 class SparcDAGToDAGISel : public SelectionDAGISel {
984 SparcTargetLowering Lowering;
986 /// Subtarget - Keep a pointer to the Sparc Subtarget around so that we can
987 /// make the right decision when generating code for different targets.
988 const SparcSubtarget &Subtarget;
990 SparcDAGToDAGISel(TargetMachine &TM)
991 : SelectionDAGISel(Lowering), Lowering(TM),
992 Subtarget(TM.getSubtarget<SparcSubtarget>()) {
995 SDNode *Select(SDOperand Op);
997 // Complex Pattern Selectors.
998 bool SelectADDRrr(SDOperand Op, SDOperand N, SDOperand &R1, SDOperand &R2);
999 bool SelectADDRri(SDOperand Op, SDOperand N, SDOperand &Base,
1002 /// InstructionSelectBasicBlock - This callback is invoked by
1003 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
1004 virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
1006 virtual const char *getPassName() const {
1007 return "SPARC DAG->DAG Pattern Instruction Selection";
1010 // Include the pieces autogenerated from the target description.
1011 #include "SparcGenDAGISel.inc"
1013 } // end anonymous namespace
1015 /// InstructionSelectBasicBlock - This callback is invoked by
1016 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
1017 void SparcDAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
1020 // Select target instructions for the DAG.
1021 DAG.setRoot(SelectRoot(DAG.getRoot()));
1022 DAG.RemoveDeadNodes();
1024 // Emit machine code to BB.
1025 ScheduleAndEmitDAG(DAG);
1028 bool SparcDAGToDAGISel::SelectADDRri(SDOperand Op, SDOperand Addr,
1029 SDOperand &Base, SDOperand &Offset) {
1030 if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
1031 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1032 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1035 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1036 Addr.getOpcode() == ISD::TargetGlobalAddress)
1037 return false; // direct calls.
1039 if (Addr.getOpcode() == ISD::ADD) {
1040 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1))) {
1041 if (Predicate_simm13(CN)) {
1042 if (FrameIndexSDNode *FIN =
1043 dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
1044 // Constant offset from frame ref.
1045 Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
1047 Base = Addr.getOperand(0);
1049 Offset = CurDAG->getTargetConstant(CN->getValue(), MVT::i32);
1053 if (Addr.getOperand(0).getOpcode() == SPISD::Lo) {
1054 Base = Addr.getOperand(1);
1055 Offset = Addr.getOperand(0).getOperand(0);
1058 if (Addr.getOperand(1).getOpcode() == SPISD::Lo) {
1059 Base = Addr.getOperand(0);
1060 Offset = Addr.getOperand(1).getOperand(0);
1065 Offset = CurDAG->getTargetConstant(0, MVT::i32);
1069 bool SparcDAGToDAGISel::SelectADDRrr(SDOperand Op, SDOperand Addr,
1070 SDOperand &R1, SDOperand &R2) {
1071 if (Addr.getOpcode() == ISD::FrameIndex) return false;
1072 if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
1073 Addr.getOpcode() == ISD::TargetGlobalAddress)
1074 return false; // direct calls.
1076 if (Addr.getOpcode() == ISD::ADD) {
1077 if (isa<ConstantSDNode>(Addr.getOperand(1)) &&
1078 Predicate_simm13(Addr.getOperand(1).Val))
1079 return false; // Let the reg+imm pattern catch this!
1080 if (Addr.getOperand(0).getOpcode() == SPISD::Lo ||
1081 Addr.getOperand(1).getOpcode() == SPISD::Lo)
1082 return false; // Let the reg+imm pattern catch this!
1083 R1 = Addr.getOperand(0);
1084 R2 = Addr.getOperand(1);
1089 R2 = CurDAG->getRegister(SP::G0, MVT::i32);
1093 SDNode *SparcDAGToDAGISel::Select(SDOperand Op) {
1095 if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
1096 N->getOpcode() < SPISD::FIRST_NUMBER)
1097 return NULL; // Already selected.
1099 switch (N->getOpcode()) {
1103 // FIXME: should use a custom expander to expose the SRA to the dag.
1104 SDOperand DivLHS = N->getOperand(0);
1105 SDOperand DivRHS = N->getOperand(1);
1106 AddToISelQueue(DivLHS);
1107 AddToISelQueue(DivRHS);
1109 // Set the Y register to the high-part.
1111 if (N->getOpcode() == ISD::SDIV) {
1112 TopPart = SDOperand(CurDAG->getTargetNode(SP::SRAri, MVT::i32, DivLHS,
1113 CurDAG->getTargetConstant(31, MVT::i32)), 0);
1115 TopPart = CurDAG->getRegister(SP::G0, MVT::i32);
1117 TopPart = SDOperand(CurDAG->getTargetNode(SP::WRYrr, MVT::Flag, TopPart,
1118 CurDAG->getRegister(SP::G0, MVT::i32)), 0);
1120 // FIXME: Handle div by immediate.
1121 unsigned Opcode = N->getOpcode() == ISD::SDIV ? SP::SDIVrr : SP::UDIVrr;
1122 return CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS,
1127 // FIXME: Handle mul by immediate.
1128 SDOperand MulLHS = N->getOperand(0);
1129 SDOperand MulRHS = N->getOperand(1);
1130 AddToISelQueue(MulLHS);
1131 AddToISelQueue(MulRHS);
1132 unsigned Opcode = N->getOpcode() == ISD::MULHU ? SP::UMULrr : SP::SMULrr;
1133 SDNode *Mul = CurDAG->getTargetNode(Opcode, MVT::i32, MVT::Flag,
1135 // The high part is in the Y register.
1136 return CurDAG->SelectNodeTo(N, SP::RDY, MVT::i32, SDOperand(Mul, 1));
1141 return SelectCode(Op);
1145 /// createSparcISelDag - This pass converts a legalized DAG into a
1146 /// SPARC-specific DAG, ready for instruction scheduling.
1148 FunctionPass *llvm::createSparcISelDag(TargetMachine &TM) {
1149 return new SparcDAGToDAGISel(TM);