1 //===-- SparcISelLowering.cpp - Sparc DAG Lowering Implementation ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the interfaces that Sparc uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #include "SparcISelLowering.h"
16 #include "SparcTargetMachine.h"
17 #include "SparcMachineFunctionInfo.h"
18 #include "llvm/Function.h"
19 #include "llvm/CodeGen/CallingConvLower.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/MachineFunction.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineRegisterInfo.h"
24 #include "llvm/CodeGen/SelectionDAG.h"
25 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
26 #include "llvm/ADT/VectorExtras.h"
27 #include "llvm/Support/ErrorHandling.h"
31 //===----------------------------------------------------------------------===//
32 // Calling Convention Implementation
33 //===----------------------------------------------------------------------===//
35 #include "SparcGenCallingConv.inc"
38 SparcTargetLowering::LowerReturn(SDValue Chain,
39 CallingConv::ID CallConv, bool isVarArg,
40 const SmallVectorImpl<ISD::OutputArg> &Outs,
41 const SmallVectorImpl<SDValue> &OutVals,
42 DebugLoc dl, SelectionDAG &DAG) const {
44 // CCValAssign - represent the assignment of the return value to locations.
45 SmallVector<CCValAssign, 16> RVLocs;
47 // CCState - Info about the registers and stack slot.
48 CCState CCInfo(CallConv, isVarArg, DAG.getTarget(),
49 RVLocs, *DAG.getContext());
51 // Analize return values.
52 CCInfo.AnalyzeReturn(Outs, RetCC_Sparc32);
54 // If this is the first return lowered for this function, add the regs to the
55 // liveout set for the function.
56 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
57 for (unsigned i = 0; i != RVLocs.size(); ++i)
58 if (RVLocs[i].isRegLoc())
59 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
64 // Copy the result values into the output registers.
65 for (unsigned i = 0; i != RVLocs.size(); ++i) {
66 CCValAssign &VA = RVLocs[i];
67 assert(VA.isRegLoc() && "Can only return in registers!");
69 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
72 // Guarantee that all emitted copies are stuck together with flags.
73 Flag = Chain.getValue(1);
77 return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
78 return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain);
81 /// LowerFormalArguments - V8 uses a very simple ABI, where all values are
82 /// passed in either one or two GPRs, including FP values. TODO: we should
83 /// pass FP values in FP registers for fastcc functions.
85 SparcTargetLowering::LowerFormalArguments(SDValue Chain,
86 CallingConv::ID CallConv, bool isVarArg,
87 const SmallVectorImpl<ISD::InputArg>
89 DebugLoc dl, SelectionDAG &DAG,
90 SmallVectorImpl<SDValue> &InVals)
93 MachineFunction &MF = DAG.getMachineFunction();
94 MachineRegisterInfo &RegInfo = MF.getRegInfo();
95 SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
97 // Assign locations to all of the incoming arguments.
98 SmallVector<CCValAssign, 16> ArgLocs;
99 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
100 ArgLocs, *DAG.getContext());
101 CCInfo.AnalyzeFormalArguments(Ins, CC_Sparc32);
103 static const unsigned ArgRegs[] = {
104 SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
106 const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
107 unsigned ArgOffset = 68;
109 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
111 CCValAssign &VA = ArgLocs[i];
112 // FIXME: We ignore the register assignments of AnalyzeFormalArguments
113 // because it doesn't know how to split a double into two i32 registers.
114 EVT ObjectVT = VA.getValVT();
115 switch (ObjectVT.getSimpleVT().SimpleTy) {
116 default: llvm_unreachable("Unhandled argument type!");
121 if (!Ins[i].Used) { // Argument is dead.
122 if (CurArgReg < ArgRegEnd) ++CurArgReg;
123 InVals.push_back(DAG.getUNDEF(ObjectVT));
124 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
125 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
126 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
127 SDValue Arg = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
128 if (ObjectVT != MVT::i32) {
129 unsigned AssertOp = ISD::AssertSext;
130 Arg = DAG.getNode(AssertOp, dl, MVT::i32, Arg,
131 DAG.getValueType(ObjectVT));
132 Arg = DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, Arg);
134 InVals.push_back(Arg);
136 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
138 SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
140 if (ObjectVT == MVT::i32) {
141 Load = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, MachinePointerInfo(),
144 ISD::LoadExtType LoadOp = ISD::SEXTLOAD;
146 // Sparc is big endian, so add an offset based on the ObjectVT.
147 unsigned Offset = 4-std::max(1U, ObjectVT.getSizeInBits()/8);
148 FIPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, FIPtr,
149 DAG.getConstant(Offset, MVT::i32));
150 Load = DAG.getExtLoad(LoadOp, MVT::i32, dl, Chain, FIPtr,
151 NULL, 0, ObjectVT, false, false, 0);
152 Load = DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, Load);
154 InVals.push_back(Load);
160 if (!Ins[i].Used) { // Argument is dead.
161 if (CurArgReg < ArgRegEnd) ++CurArgReg;
162 InVals.push_back(DAG.getUNDEF(ObjectVT));
163 } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
164 // FP value is passed in an integer register.
165 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
166 MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
167 SDValue Arg = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
169 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Arg);
170 InVals.push_back(Arg);
172 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
174 SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
175 SDValue Load = DAG.getLoad(MVT::f32, dl, Chain, FIPtr,
176 MachinePointerInfo(),
178 InVals.push_back(Load);
185 if (!Ins[i].Used) { // Argument is dead.
186 if (CurArgReg < ArgRegEnd) ++CurArgReg;
187 if (CurArgReg < ArgRegEnd) ++CurArgReg;
188 InVals.push_back(DAG.getUNDEF(ObjectVT));
191 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
192 unsigned VRegHi = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
193 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegHi);
194 HiVal = DAG.getCopyFromReg(Chain, dl, VRegHi, MVT::i32);
196 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
198 SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
199 HiVal = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, MachinePointerInfo(),
204 if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
205 unsigned VRegLo = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
206 MF.getRegInfo().addLiveIn(*CurArgReg++, VRegLo);
207 LoVal = DAG.getCopyFromReg(Chain, dl, VRegLo, MVT::i32);
209 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4,
211 SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
212 LoVal = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, MachinePointerInfo(),
216 // Compose the two halves together into an i64 unit.
218 DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, LoVal, HiVal);
220 // If we want a double, do a bit convert.
221 if (ObjectVT == MVT::f64)
222 WholeValue = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, WholeValue);
224 InVals.push_back(WholeValue);
231 // Store remaining ArgRegs to the stack if this is a varargs function.
233 // Remember the vararg offset for the va_start implementation.
234 FuncInfo->setVarArgsFrameOffset(ArgOffset);
236 std::vector<SDValue> OutChains;
238 for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
239 unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
240 MF.getRegInfo().addLiveIn(*CurArgReg, VReg);
241 SDValue Arg = DAG.getCopyFromReg(DAG.getRoot(), dl, VReg, MVT::i32);
243 int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
245 SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
247 OutChains.push_back(DAG.getStore(DAG.getRoot(), dl, Arg, FIPtr, NULL, 0,
252 if (!OutChains.empty()) {
253 OutChains.push_back(Chain);
254 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
255 &OutChains[0], OutChains.size());
263 SparcTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
264 CallingConv::ID CallConv, bool isVarArg,
266 const SmallVectorImpl<ISD::OutputArg> &Outs,
267 const SmallVectorImpl<SDValue> &OutVals,
268 const SmallVectorImpl<ISD::InputArg> &Ins,
269 DebugLoc dl, SelectionDAG &DAG,
270 SmallVectorImpl<SDValue> &InVals) const {
271 // Sparc target does not yet support tail call optimization.
275 // Analyze operands of the call, assigning locations to each operand.
276 SmallVector<CCValAssign, 16> ArgLocs;
277 CCState CCInfo(CallConv, isVarArg, DAG.getTarget(), ArgLocs);
278 CCInfo.AnalyzeCallOperands(Outs, CC_Sparc32);
280 // Get the size of the outgoing arguments stack space requirement.
281 unsigned ArgsSize = CCInfo.getNextStackOffset();
282 // FIXME: We can't use this until f64 is known to take two GPRs.
286 // Count the size of the outgoing arguments.
287 unsigned ArgsSize = 0;
288 for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
289 switch (Outs[i].VT.getSimpleVT().SimpleTy) {
290 default: llvm_unreachable("Unknown value type!");
305 ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
310 // Keep stack frames 8-byte aligned.
311 ArgsSize = (ArgsSize+7) & ~7;
313 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(ArgsSize, true));
315 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
316 SmallVector<SDValue, 8> MemOpChains;
319 // Walk the register/memloc assignments, inserting copies/loads.
320 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
321 CCValAssign &VA = ArgLocs[i];
322 SDValue Arg = OutVals[i];
324 // Promote the value if needed.
325 switch (VA.getLocInfo()) {
326 default: llvm_unreachable("Unknown loc info!");
327 case CCValAssign::Full: break;
328 case CCValAssign::SExt:
329 Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
331 case CCValAssign::ZExt:
332 Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
334 case CCValAssign::AExt:
335 Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
339 // Arguments that can be passed on register must be kept at
342 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
346 assert(VA.isMemLoc());
348 // Create a store off the stack pointer for this argument.
349 SDValue StackPtr = DAG.getRegister(SP::O6, MVT::i32);
350 // FIXME: VERIFY THAT 68 IS RIGHT.
351 SDValue PtrOff = DAG.getIntPtrConstant(VA.getLocMemOffset()+68);
352 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
353 MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0,
358 static const unsigned ArgRegs[] = {
359 SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
361 unsigned ArgOffset = 68;
363 for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
364 SDValue Val = OutVals[i];
365 EVT ObjectVT = Outs[i].VT;
366 SDValue ValToStore(0, 0);
368 switch (ObjectVT.getSimpleVT().SimpleTy) {
369 default: llvm_unreachable("Unhandled argument type!");
373 if (RegsToPass.size() >= 6) {
376 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Val));
381 if (RegsToPass.size() >= 6) {
384 // Convert this to a FP value in an int reg.
385 Val = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Val);
386 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Val));
391 if (RegsToPass.size() >= 6) {
392 ValToStore = Val; // Whole thing is passed in memory.
396 // Break into top and bottom parts by storing to the stack and loading
397 // out the parts as integers. Top part goes in a reg.
398 SDValue StackPtr = DAG.CreateStackTemporary(MVT::f64, MVT::i32);
399 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl,
400 Val, StackPtr, NULL, 0,
402 // Sparc is big-endian, so the high part comes first.
403 SDValue Hi = DAG.getLoad(MVT::i32, dl, Store, StackPtr,
404 MachinePointerInfo(), false, false, 0);
405 // Increment the pointer to the other half.
406 StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr,
407 DAG.getIntPtrConstant(4));
408 // Load the low part.
409 SDValue Lo = DAG.getLoad(MVT::i32, dl, Store, StackPtr,
410 MachinePointerInfo(), false, false, 0);
412 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Hi));
414 if (RegsToPass.size() >= 6) {
419 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Lo));
425 if (RegsToPass.size() >= 6) {
426 ValToStore = Val; // Whole thing is passed in memory.
430 // Split the value into top and bottom part. Top part goes in a reg.
431 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Val,
432 DAG.getConstant(1, MVT::i32));
433 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Val,
434 DAG.getConstant(0, MVT::i32));
435 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Hi));
437 if (RegsToPass.size() >= 6) {
442 RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Lo));
448 if (ValToStore.getNode()) {
449 SDValue StackPtr = DAG.getRegister(SP::O6, MVT::i32);
450 SDValue PtrOff = DAG.getConstant(ArgOffset, MVT::i32);
451 PtrOff = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr, PtrOff);
452 MemOpChains.push_back(DAG.getStore(Chain, dl, ValToStore,
456 ArgOffset += ObjSize;
460 // Emit all stores, make sure the occur before any copies into physregs.
461 if (!MemOpChains.empty())
462 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
463 &MemOpChains[0], MemOpChains.size());
465 // Build a sequence of copy-to-reg nodes chained together with token
466 // chain and flag operands which copy the outgoing args into registers.
467 // The InFlag in necessary since all emited instructions must be
470 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
471 unsigned Reg = RegsToPass[i].first;
472 // Remap I0->I7 -> O0->O7.
473 if (Reg >= SP::I0 && Reg <= SP::I7)
474 Reg = Reg-SP::I0+SP::O0;
476 Chain = DAG.getCopyToReg(Chain, dl, Reg, RegsToPass[i].second, InFlag);
477 InFlag = Chain.getValue(1);
480 // If the callee is a GlobalAddress node (quite common, every direct call is)
481 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
482 // Likewise ExternalSymbol -> TargetExternalSymbol.
483 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
484 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, MVT::i32);
485 else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
486 Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
488 std::vector<EVT> NodeTys;
489 NodeTys.push_back(MVT::Other); // Returns a chain
490 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
491 SDValue Ops[] = { Chain, Callee, InFlag };
492 Chain = DAG.getNode(SPISD::CALL, dl, NodeTys, Ops, InFlag.getNode() ? 3 : 2);
493 InFlag = Chain.getValue(1);
495 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(ArgsSize, true),
496 DAG.getIntPtrConstant(0, true), InFlag);
497 InFlag = Chain.getValue(1);
499 // Assign locations to each value returned by this call.
500 SmallVector<CCValAssign, 16> RVLocs;
501 CCState RVInfo(CallConv, isVarArg, DAG.getTarget(),
502 RVLocs, *DAG.getContext());
504 RVInfo.AnalyzeCallResult(Ins, RetCC_Sparc32);
506 // Copy all of the result registers out of their specified physreg.
507 for (unsigned i = 0; i != RVLocs.size(); ++i) {
508 unsigned Reg = RVLocs[i].getLocReg();
510 // Remap I0->I7 -> O0->O7.
511 if (Reg >= SP::I0 && Reg <= SP::I7)
512 Reg = Reg-SP::I0+SP::O0;
514 Chain = DAG.getCopyFromReg(Chain, dl, Reg,
515 RVLocs[i].getValVT(), InFlag).getValue(1);
516 InFlag = Chain.getValue(2);
517 InVals.push_back(Chain.getValue(0));
525 //===----------------------------------------------------------------------===//
526 // TargetLowering Implementation
527 //===----------------------------------------------------------------------===//
529 /// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
531 static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
533 default: llvm_unreachable("Unknown integer condition code!");
534 case ISD::SETEQ: return SPCC::ICC_E;
535 case ISD::SETNE: return SPCC::ICC_NE;
536 case ISD::SETLT: return SPCC::ICC_L;
537 case ISD::SETGT: return SPCC::ICC_G;
538 case ISD::SETLE: return SPCC::ICC_LE;
539 case ISD::SETGE: return SPCC::ICC_GE;
540 case ISD::SETULT: return SPCC::ICC_CS;
541 case ISD::SETULE: return SPCC::ICC_LEU;
542 case ISD::SETUGT: return SPCC::ICC_GU;
543 case ISD::SETUGE: return SPCC::ICC_CC;
547 /// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
549 static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
551 default: llvm_unreachable("Unknown fp condition code!");
553 case ISD::SETOEQ: return SPCC::FCC_E;
555 case ISD::SETUNE: return SPCC::FCC_NE;
557 case ISD::SETOLT: return SPCC::FCC_L;
559 case ISD::SETOGT: return SPCC::FCC_G;
561 case ISD::SETOLE: return SPCC::FCC_LE;
563 case ISD::SETOGE: return SPCC::FCC_GE;
564 case ISD::SETULT: return SPCC::FCC_UL;
565 case ISD::SETULE: return SPCC::FCC_ULE;
566 case ISD::SETUGT: return SPCC::FCC_UG;
567 case ISD::SETUGE: return SPCC::FCC_UGE;
568 case ISD::SETUO: return SPCC::FCC_U;
569 case ISD::SETO: return SPCC::FCC_O;
570 case ISD::SETONE: return SPCC::FCC_LG;
571 case ISD::SETUEQ: return SPCC::FCC_UE;
575 SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
576 : TargetLowering(TM, new TargetLoweringObjectFileELF()) {
578 // Set up the register classes.
579 addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
580 addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
581 addRegisterClass(MVT::f64, SP::DFPRegsRegisterClass);
583 // Turn FP extload into load/fextend
584 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
585 // Sparc doesn't have i1 sign extending load
586 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
587 // Turn FP truncstore into trunc + store.
588 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
590 // Custom legalize GlobalAddress nodes into LO/HI parts.
591 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
592 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
593 setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
595 // Sparc doesn't have sext_inreg, replace them with shl/sra
596 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
597 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
598 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
600 // Sparc has no REM or DIVREM operations.
601 setOperationAction(ISD::UREM, MVT::i32, Expand);
602 setOperationAction(ISD::SREM, MVT::i32, Expand);
603 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
604 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
606 // Custom expand fp<->sint
607 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
608 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
611 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
612 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
614 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
615 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
617 // Sparc has no select or setcc: expand to SELECT_CC.
618 setOperationAction(ISD::SELECT, MVT::i32, Expand);
619 setOperationAction(ISD::SELECT, MVT::f32, Expand);
620 setOperationAction(ISD::SELECT, MVT::f64, Expand);
621 setOperationAction(ISD::SETCC, MVT::i32, Expand);
622 setOperationAction(ISD::SETCC, MVT::f32, Expand);
623 setOperationAction(ISD::SETCC, MVT::f64, Expand);
625 // Sparc doesn't have BRCOND either, it has BR_CC.
626 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
627 setOperationAction(ISD::BRIND, MVT::Other, Expand);
628 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
629 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
630 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
631 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
633 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
634 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
635 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
637 // SPARC has no intrinsics for these particular operations.
638 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
640 setOperationAction(ISD::FSIN , MVT::f64, Expand);
641 setOperationAction(ISD::FCOS , MVT::f64, Expand);
642 setOperationAction(ISD::FREM , MVT::f64, Expand);
643 setOperationAction(ISD::FSIN , MVT::f32, Expand);
644 setOperationAction(ISD::FCOS , MVT::f32, Expand);
645 setOperationAction(ISD::FREM , MVT::f32, Expand);
646 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
647 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
648 setOperationAction(ISD::CTLZ , MVT::i32, Expand);
649 setOperationAction(ISD::ROTL , MVT::i32, Expand);
650 setOperationAction(ISD::ROTR , MVT::i32, Expand);
651 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
652 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
653 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
654 setOperationAction(ISD::FPOW , MVT::f64, Expand);
655 setOperationAction(ISD::FPOW , MVT::f32, Expand);
657 setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
658 setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
659 setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
661 // FIXME: Sparc provides these multiplies, but we don't have them yet.
662 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
663 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
665 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
667 // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
668 setOperationAction(ISD::VASTART , MVT::Other, Custom);
669 // VAARG needs to be lowered to not do unaligned accesses for doubles.
670 setOperationAction(ISD::VAARG , MVT::Other, Custom);
672 // Use the default implementation.
673 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
674 setOperationAction(ISD::VAEND , MVT::Other, Expand);
675 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
676 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
677 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
679 // No debug info support yet.
680 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
682 setStackPointerRegisterToSaveRestore(SP::O6);
684 if (TM.getSubtarget<SparcSubtarget>().isV9())
685 setOperationAction(ISD::CTPOP, MVT::i32, Legal);
687 computeRegisterProperties();
690 const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
693 case SPISD::CMPICC: return "SPISD::CMPICC";
694 case SPISD::CMPFCC: return "SPISD::CMPFCC";
695 case SPISD::BRICC: return "SPISD::BRICC";
696 case SPISD::BRFCC: return "SPISD::BRFCC";
697 case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
698 case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
699 case SPISD::Hi: return "SPISD::Hi";
700 case SPISD::Lo: return "SPISD::Lo";
701 case SPISD::FTOI: return "SPISD::FTOI";
702 case SPISD::ITOF: return "SPISD::ITOF";
703 case SPISD::CALL: return "SPISD::CALL";
704 case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
708 /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
709 /// be zero. Op is expected to be a target specific node. Used by DAG
711 void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
715 const SelectionDAG &DAG,
716 unsigned Depth) const {
717 APInt KnownZero2, KnownOne2;
718 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
720 switch (Op.getOpcode()) {
722 case SPISD::SELECT_ICC:
723 case SPISD::SELECT_FCC:
724 DAG.ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne,
726 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2,
728 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
729 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
731 // Only known if known in both the LHS and RHS.
732 KnownOne &= KnownOne2;
733 KnownZero &= KnownZero2;
738 // Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
739 // set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
740 static void LookThroughSetCC(SDValue &LHS, SDValue &RHS,
741 ISD::CondCode CC, unsigned &SPCC) {
742 if (isa<ConstantSDNode>(RHS) &&
743 cast<ConstantSDNode>(RHS)->isNullValue() &&
745 ((LHS.getOpcode() == SPISD::SELECT_ICC &&
746 LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
747 (LHS.getOpcode() == SPISD::SELECT_FCC &&
748 LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
749 isa<ConstantSDNode>(LHS.getOperand(0)) &&
750 isa<ConstantSDNode>(LHS.getOperand(1)) &&
751 cast<ConstantSDNode>(LHS.getOperand(0))->isOne() &&
752 cast<ConstantSDNode>(LHS.getOperand(1))->isNullValue()) {
753 SDValue CMPCC = LHS.getOperand(3);
754 SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getZExtValue();
755 LHS = CMPCC.getOperand(0);
756 RHS = CMPCC.getOperand(1);
760 SDValue SparcTargetLowering::LowerGlobalAddress(SDValue Op,
761 SelectionDAG &DAG) const {
762 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
763 // FIXME there isn't really any debug info here
764 DebugLoc dl = Op.getDebugLoc();
765 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32);
766 SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, GA);
767 SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, GA);
769 if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
770 return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
772 SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
774 SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
775 SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
776 GlobalBase, RelAddr);
777 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
778 AbsAddr, MachinePointerInfo(), false, false, 0);
781 SDValue SparcTargetLowering::LowerConstantPool(SDValue Op,
782 SelectionDAG &DAG) const {
783 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
784 // FIXME there isn't really any debug info here
785 DebugLoc dl = Op.getDebugLoc();
786 const Constant *C = N->getConstVal();
787 SDValue CP = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment());
788 SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, CP);
789 SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, CP);
790 if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
791 return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
793 SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
795 SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
796 SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
797 GlobalBase, RelAddr);
798 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
799 AbsAddr, MachinePointerInfo(), false, false, 0);
802 static SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
803 DebugLoc dl = Op.getDebugLoc();
804 // Convert the fp value to integer in an FP register.
805 assert(Op.getValueType() == MVT::i32);
806 Op = DAG.getNode(SPISD::FTOI, dl, MVT::f32, Op.getOperand(0));
807 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Op);
810 static SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
811 DebugLoc dl = Op.getDebugLoc();
812 assert(Op.getOperand(0).getValueType() == MVT::i32);
813 SDValue Tmp = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Op.getOperand(0));
814 // Convert the int value to FP in an FP register.
815 return DAG.getNode(SPISD::ITOF, dl, Op.getValueType(), Tmp);
818 static SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) {
819 SDValue Chain = Op.getOperand(0);
820 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
821 SDValue LHS = Op.getOperand(2);
822 SDValue RHS = Op.getOperand(3);
823 SDValue Dest = Op.getOperand(4);
824 DebugLoc dl = Op.getDebugLoc();
825 unsigned Opc, SPCC = ~0U;
827 // If this is a br_cc of a "setcc", and if the setcc got lowered into
828 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
829 LookThroughSetCC(LHS, RHS, CC, SPCC);
831 // Get the condition flag.
833 if (LHS.getValueType() == MVT::i32) {
834 std::vector<EVT> VTs;
835 VTs.push_back(MVT::i32);
836 VTs.push_back(MVT::Flag);
837 SDValue Ops[2] = { LHS, RHS };
838 CompareFlag = DAG.getNode(SPISD::CMPICC, dl, VTs, Ops, 2).getValue(1);
839 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
842 CompareFlag = DAG.getNode(SPISD::CMPFCC, dl, MVT::Flag, LHS, RHS);
843 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
846 return DAG.getNode(Opc, dl, MVT::Other, Chain, Dest,
847 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
850 static SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) {
851 SDValue LHS = Op.getOperand(0);
852 SDValue RHS = Op.getOperand(1);
853 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
854 SDValue TrueVal = Op.getOperand(2);
855 SDValue FalseVal = Op.getOperand(3);
856 DebugLoc dl = Op.getDebugLoc();
857 unsigned Opc, SPCC = ~0U;
859 // If this is a select_cc of a "setcc", and if the setcc got lowered into
860 // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
861 LookThroughSetCC(LHS, RHS, CC, SPCC);
864 if (LHS.getValueType() == MVT::i32) {
865 std::vector<EVT> VTs;
866 VTs.push_back(LHS.getValueType()); // subcc returns a value
867 VTs.push_back(MVT::Flag);
868 SDValue Ops[2] = { LHS, RHS };
869 CompareFlag = DAG.getNode(SPISD::CMPICC, dl, VTs, Ops, 2).getValue(1);
870 Opc = SPISD::SELECT_ICC;
871 if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
873 CompareFlag = DAG.getNode(SPISD::CMPFCC, dl, MVT::Flag, LHS, RHS);
874 Opc = SPISD::SELECT_FCC;
875 if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
877 return DAG.getNode(Opc, dl, TrueVal.getValueType(), TrueVal, FalseVal,
878 DAG.getConstant(SPCC, MVT::i32), CompareFlag);
881 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG,
882 const SparcTargetLowering &TLI) {
883 MachineFunction &MF = DAG.getMachineFunction();
884 SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
886 // vastart just stores the address of the VarArgsFrameIndex slot into the
887 // memory location argument.
888 DebugLoc dl = Op.getDebugLoc();
890 DAG.getNode(ISD::ADD, dl, MVT::i32,
891 DAG.getRegister(SP::I6, MVT::i32),
892 DAG.getConstant(FuncInfo->getVarArgsFrameOffset(),
894 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
895 return DAG.getStore(Op.getOperand(0), dl, Offset, Op.getOperand(1), SV, 0,
899 static SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG) {
900 SDNode *Node = Op.getNode();
901 EVT VT = Node->getValueType(0);
902 SDValue InChain = Node->getOperand(0);
903 SDValue VAListPtr = Node->getOperand(1);
904 const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
905 DebugLoc dl = Node->getDebugLoc();
906 SDValue VAList = DAG.getLoad(MVT::i32, dl, InChain, VAListPtr,
907 MachinePointerInfo(SV), false, false, 0);
908 // Increment the pointer, VAList, to the next vaarg
909 SDValue NextPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, VAList,
910 DAG.getConstant(VT.getSizeInBits()/8,
912 // Store the incremented VAList to the legalized pointer
913 InChain = DAG.getStore(VAList.getValue(1), dl, NextPtr,
914 VAListPtr, SV, 0, false, false, 0);
915 // Load the actual argument out of the pointer VAList, unless this is an
918 return DAG.getLoad(VT, dl, InChain, VAList, MachinePointerInfo(),
921 // Otherwise, load it as i64, then do a bitconvert.
922 SDValue V = DAG.getLoad(MVT::i64, dl, InChain, VAList, MachinePointerInfo(),
925 // Bit-Convert the value to f64.
927 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, V),
930 return DAG.getMergeValues(Ops, 2, dl);
933 static SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) {
934 SDValue Chain = Op.getOperand(0); // Legalize the chain.
935 SDValue Size = Op.getOperand(1); // Legalize the size.
936 DebugLoc dl = Op.getDebugLoc();
938 unsigned SPReg = SP::O6;
939 SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, MVT::i32);
940 SDValue NewSP = DAG.getNode(ISD::SUB, dl, MVT::i32, SP, Size); // Value
941 Chain = DAG.getCopyToReg(SP.getValue(1), dl, SPReg, NewSP); // Output chain
943 // The resultant pointer is actually 16 words from the bottom of the stack,
944 // to provide a register spill area.
945 SDValue NewVal = DAG.getNode(ISD::ADD, dl, MVT::i32, NewSP,
946 DAG.getConstant(96, MVT::i32));
947 SDValue Ops[2] = { NewVal, Chain };
948 return DAG.getMergeValues(Ops, 2, dl);
952 SDValue SparcTargetLowering::
953 LowerOperation(SDValue Op, SelectionDAG &DAG) const {
954 switch (Op.getOpcode()) {
955 default: llvm_unreachable("Should not custom lower this!");
956 // Frame & Return address. Currently unimplemented
957 case ISD::RETURNADDR: return SDValue();
958 case ISD::FRAMEADDR: return SDValue();
959 case ISD::GlobalTLSAddress:
960 llvm_unreachable("TLS not implemented for Sparc.");
961 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
962 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
963 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
964 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
965 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
966 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
967 case ISD::VASTART: return LowerVASTART(Op, DAG, *this);
968 case ISD::VAARG: return LowerVAARG(Op, DAG);
969 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
974 SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
975 MachineBasicBlock *BB) const {
976 const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
979 DebugLoc dl = MI->getDebugLoc();
980 // Figure out the conditional branch opcode to use for this select_cc.
981 switch (MI->getOpcode()) {
982 default: llvm_unreachable("Unknown SELECT_CC!");
983 case SP::SELECT_CC_Int_ICC:
984 case SP::SELECT_CC_FP_ICC:
985 case SP::SELECT_CC_DFP_ICC:
986 BROpcode = SP::BCOND;
988 case SP::SELECT_CC_Int_FCC:
989 case SP::SELECT_CC_FP_FCC:
990 case SP::SELECT_CC_DFP_FCC:
991 BROpcode = SP::FBCOND;
995 CC = (SPCC::CondCodes)MI->getOperand(3).getImm();
997 // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
998 // control-flow pattern. The incoming instruction knows the destination vreg
999 // to set, the condition code register to branch on, the true/false values to
1000 // select between, and a branch opcode to use.
1001 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1002 MachineFunction::iterator It = BB;
1009 // fallthrough --> copy0MBB
1010 MachineBasicBlock *thisMBB = BB;
1011 MachineFunction *F = BB->getParent();
1012 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
1013 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
1015 // Transfer the remainder of BB and its successor edges to sinkMBB.
1016 sinkMBB->splice(sinkMBB->begin(), BB,
1017 llvm::next(MachineBasicBlock::iterator(MI)),
1019 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
1021 // Add the true and fallthrough blocks as its successors.
1022 BB->addSuccessor(copy0MBB);
1023 BB->addSuccessor(sinkMBB);
1025 BuildMI(BB, dl, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
1026 F->insert(It, copy0MBB);
1027 F->insert(It, sinkMBB);
1030 // %FalseValue = ...
1031 // # fallthrough to sinkMBB
1034 // Update machine-CFG edges
1035 BB->addSuccessor(sinkMBB);
1038 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
1041 BuildMI(*BB, BB->begin(), dl, TII.get(SP::PHI), MI->getOperand(0).getReg())
1042 .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
1043 .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
1045 MI->eraseFromParent(); // The pseudo instruction is gone now.
1049 //===----------------------------------------------------------------------===//
1050 // Sparc Inline Assembly Support
1051 //===----------------------------------------------------------------------===//
1053 /// getConstraintType - Given a constraint letter, return the type of
1054 /// constraint it is for this target.
1055 SparcTargetLowering::ConstraintType
1056 SparcTargetLowering::getConstraintType(const std::string &Constraint) const {
1057 if (Constraint.size() == 1) {
1058 switch (Constraint[0]) {
1060 case 'r': return C_RegisterClass;
1064 return TargetLowering::getConstraintType(Constraint);
1067 std::pair<unsigned, const TargetRegisterClass*>
1068 SparcTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
1070 if (Constraint.size() == 1) {
1071 switch (Constraint[0]) {
1073 return std::make_pair(0U, SP::IntRegsRegisterClass);
1077 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
1080 std::vector<unsigned> SparcTargetLowering::
1081 getRegClassForInlineAsmConstraint(const std::string &Constraint,
1083 if (Constraint.size() != 1)
1084 return std::vector<unsigned>();
1086 switch (Constraint[0]) {
1089 return make_vector<unsigned>(SP::L0, SP::L1, SP::L2, SP::L3,
1090 SP::L4, SP::L5, SP::L6, SP::L7,
1091 SP::I0, SP::I1, SP::I2, SP::I3,
1093 SP::O0, SP::O1, SP::O2, SP::O3,
1094 SP::O4, SP::O5, SP::O7, 0);
1097 return std::vector<unsigned>();
1101 SparcTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
1102 // The Sparc target isn't yet aware of offsets.
1106 /// getFunctionAlignment - Return the Log2 alignment of this function.
1107 unsigned SparcTargetLowering::getFunctionAlignment(const Function *) const {