1 //===-- ARMFastISel.cpp - ARM FastISel implementation ---------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ARM-specific support for the FastISel class. Some
11 // of the target-specific code is generated by tablegen in the file
12 // ARMGenFastISel.inc, which is #included here.
14 //===----------------------------------------------------------------------===//
17 #include "ARMAddressingModes.h"
18 #include "ARMBaseInstrInfo.h"
19 #include "ARMCallingConv.h"
20 #include "ARMRegisterInfo.h"
21 #include "ARMTargetMachine.h"
22 #include "ARMSubtarget.h"
23 #include "ARMConstantPoolValue.h"
24 #include "llvm/CallingConv.h"
25 #include "llvm/DerivedTypes.h"
26 #include "llvm/GlobalVariable.h"
27 #include "llvm/Instructions.h"
28 #include "llvm/IntrinsicInst.h"
29 #include "llvm/Module.h"
30 #include "llvm/Operator.h"
31 #include "llvm/CodeGen/Analysis.h"
32 #include "llvm/CodeGen/FastISel.h"
33 #include "llvm/CodeGen/FunctionLoweringInfo.h"
34 #include "llvm/CodeGen/MachineInstrBuilder.h"
35 #include "llvm/CodeGen/MachineModuleInfo.h"
36 #include "llvm/CodeGen/MachineConstantPool.h"
37 #include "llvm/CodeGen/MachineFrameInfo.h"
38 #include "llvm/CodeGen/MachineMemOperand.h"
39 #include "llvm/CodeGen/MachineRegisterInfo.h"
40 #include "llvm/CodeGen/PseudoSourceValue.h"
41 #include "llvm/Support/CallSite.h"
42 #include "llvm/Support/CommandLine.h"
43 #include "llvm/Support/ErrorHandling.h"
44 #include "llvm/Support/GetElementPtrTypeIterator.h"
45 #include "llvm/Target/TargetData.h"
46 #include "llvm/Target/TargetInstrInfo.h"
47 #include "llvm/Target/TargetLowering.h"
48 #include "llvm/Target/TargetMachine.h"
49 #include "llvm/Target/TargetOptions.h"
53 DisableARMFastISel("disable-arm-fast-isel",
54 cl::desc("Turn off experimental ARM fast-isel support"),
55 cl::init(false), cl::Hidden);
57 extern cl::opt<bool> EnableARMLongCalls;
61 // All possible address modes, plus some.
62 typedef struct Address {
77 // Innocuous defaults for our address.
79 : BaseType(RegBase), Offset(0), Scale(0), PlusReg(0) {
84 class ARMFastISel : public FastISel {
86 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
87 /// make the right decision when generating code for different targets.
88 const ARMSubtarget *Subtarget;
89 const TargetMachine &TM;
90 const TargetInstrInfo &TII;
91 const TargetLowering &TLI;
94 // Convenience variables to avoid some queries.
99 explicit ARMFastISel(FunctionLoweringInfo &funcInfo)
100 : FastISel(funcInfo),
101 TM(funcInfo.MF->getTarget()),
102 TII(*TM.getInstrInfo()),
103 TLI(*TM.getTargetLowering()) {
104 Subtarget = &TM.getSubtarget<ARMSubtarget>();
105 AFI = funcInfo.MF->getInfo<ARMFunctionInfo>();
106 isThumb = AFI->isThumbFunction();
107 Context = &funcInfo.Fn->getContext();
110 // Code from FastISel.cpp.
111 virtual unsigned FastEmitInst_(unsigned MachineInstOpcode,
112 const TargetRegisterClass *RC);
113 virtual unsigned FastEmitInst_r(unsigned MachineInstOpcode,
114 const TargetRegisterClass *RC,
115 unsigned Op0, bool Op0IsKill);
116 virtual unsigned FastEmitInst_rr(unsigned MachineInstOpcode,
117 const TargetRegisterClass *RC,
118 unsigned Op0, bool Op0IsKill,
119 unsigned Op1, bool Op1IsKill);
120 virtual unsigned FastEmitInst_rrr(unsigned MachineInstOpcode,
121 const TargetRegisterClass *RC,
122 unsigned Op0, bool Op0IsKill,
123 unsigned Op1, bool Op1IsKill,
124 unsigned Op2, bool Op2IsKill);
125 virtual unsigned FastEmitInst_ri(unsigned MachineInstOpcode,
126 const TargetRegisterClass *RC,
127 unsigned Op0, bool Op0IsKill,
129 virtual unsigned FastEmitInst_rf(unsigned MachineInstOpcode,
130 const TargetRegisterClass *RC,
131 unsigned Op0, bool Op0IsKill,
132 const ConstantFP *FPImm);
133 virtual unsigned FastEmitInst_rri(unsigned MachineInstOpcode,
134 const TargetRegisterClass *RC,
135 unsigned Op0, bool Op0IsKill,
136 unsigned Op1, bool Op1IsKill,
138 virtual unsigned FastEmitInst_i(unsigned MachineInstOpcode,
139 const TargetRegisterClass *RC,
141 virtual unsigned FastEmitInst_ii(unsigned MachineInstOpcode,
142 const TargetRegisterClass *RC,
143 uint64_t Imm1, uint64_t Imm2);
145 virtual unsigned FastEmitInst_extractsubreg(MVT RetVT,
146 unsigned Op0, bool Op0IsKill,
149 // Backend specific FastISel code.
150 virtual bool TargetSelectInstruction(const Instruction *I);
151 virtual unsigned TargetMaterializeConstant(const Constant *C);
152 virtual unsigned TargetMaterializeAlloca(const AllocaInst *AI);
154 #include "ARMGenFastISel.inc"
156 // Instruction selection routines.
158 bool SelectLoad(const Instruction *I);
159 bool SelectStore(const Instruction *I);
160 bool SelectBranch(const Instruction *I);
161 bool SelectCmp(const Instruction *I);
162 bool SelectFPExt(const Instruction *I);
163 bool SelectFPTrunc(const Instruction *I);
164 bool SelectBinaryOp(const Instruction *I, unsigned ISDOpcode);
165 bool SelectSIToFP(const Instruction *I);
166 bool SelectFPToSI(const Instruction *I);
167 bool SelectSDiv(const Instruction *I);
168 bool SelectSRem(const Instruction *I);
169 bool SelectCall(const Instruction *I);
170 bool SelectSelect(const Instruction *I);
171 bool SelectRet(const Instruction *I);
175 bool isTypeLegal(const Type *Ty, MVT &VT);
176 bool isLoadTypeLegal(const Type *Ty, MVT &VT);
177 bool ARMEmitLoad(EVT VT, unsigned &ResultReg, Address &Addr);
178 bool ARMEmitStore(EVT VT, unsigned SrcReg, Address &Addr);
179 bool ARMComputeAddress(const Value *Obj, Address &Addr);
180 void ARMSimplifyAddress(Address &Addr, EVT VT);
181 unsigned ARMMaterializeFP(const ConstantFP *CFP, EVT VT);
182 unsigned ARMMaterializeInt(const Constant *C, EVT VT);
183 unsigned ARMMaterializeGV(const GlobalValue *GV, EVT VT);
184 unsigned ARMMoveToFPReg(EVT VT, unsigned SrcReg);
185 unsigned ARMMoveToIntReg(EVT VT, unsigned SrcReg);
186 unsigned ARMSelectCallOp(const GlobalValue *GV);
188 // Call handling routines.
190 bool FastEmitExtend(ISD::NodeType Opc, EVT DstVT, unsigned Src, EVT SrcVT,
191 unsigned &ResultReg);
192 CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool Return);
193 bool ProcessCallArgs(SmallVectorImpl<Value*> &Args,
194 SmallVectorImpl<unsigned> &ArgRegs,
195 SmallVectorImpl<MVT> &ArgVTs,
196 SmallVectorImpl<ISD::ArgFlagsTy> &ArgFlags,
197 SmallVectorImpl<unsigned> &RegArgs,
200 bool FinishCall(MVT RetVT, SmallVectorImpl<unsigned> &UsedRegs,
201 const Instruction *I, CallingConv::ID CC,
203 bool ARMEmitLibcall(const Instruction *I, RTLIB::Libcall Call);
205 // OptionalDef handling routines.
207 bool isARMNEONPred(const MachineInstr *MI);
208 bool DefinesOptionalPredicate(MachineInstr *MI, bool *CPSR);
209 const MachineInstrBuilder &AddOptionalDefs(const MachineInstrBuilder &MIB);
210 void AddLoadStoreOperands(EVT VT, Address &Addr,
211 const MachineInstrBuilder &MIB);
214 } // end anonymous namespace
216 #include "ARMGenCallingConv.inc"
218 // DefinesOptionalPredicate - This is different from DefinesPredicate in that
219 // we don't care about implicit defs here, just places we'll need to add a
220 // default CCReg argument. Sets CPSR if we're setting CPSR instead of CCR.
221 bool ARMFastISel::DefinesOptionalPredicate(MachineInstr *MI, bool *CPSR) {
222 const TargetInstrDesc &TID = MI->getDesc();
223 if (!TID.hasOptionalDef())
226 // Look to see if our OptionalDef is defining CPSR or CCR.
227 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
228 const MachineOperand &MO = MI->getOperand(i);
229 if (!MO.isReg() || !MO.isDef()) continue;
230 if (MO.getReg() == ARM::CPSR)
236 bool ARMFastISel::isARMNEONPred(const MachineInstr *MI) {
237 const TargetInstrDesc &TID = MI->getDesc();
239 // If we're a thumb2 or not NEON function we were handled via isPredicable.
240 if ((TID.TSFlags & ARMII::DomainMask) != ARMII::DomainNEON ||
241 AFI->isThumb2Function())
244 for (unsigned i = 0, e = TID.getNumOperands(); i != e; ++i)
245 if (TID.OpInfo[i].isPredicate())
251 // If the machine is predicable go ahead and add the predicate operands, if
252 // it needs default CC operands add those.
253 // TODO: If we want to support thumb1 then we'll need to deal with optional
254 // CPSR defs that need to be added before the remaining operands. See s_cc_out
255 // for descriptions why.
256 const MachineInstrBuilder &
257 ARMFastISel::AddOptionalDefs(const MachineInstrBuilder &MIB) {
258 MachineInstr *MI = &*MIB;
260 // Do we use a predicate? or...
261 // Are we NEON in ARM mode and have a predicate operand? If so, I know
262 // we're not predicable but add it anyways.
263 if (TII.isPredicable(MI) || isARMNEONPred(MI))
266 // Do we optionally set a predicate? Preds is size > 0 iff the predicate
267 // defines CPSR. All other OptionalDefines in ARM are the CCR register.
269 if (DefinesOptionalPredicate(MI, &CPSR)) {
278 unsigned ARMFastISel::FastEmitInst_(unsigned MachineInstOpcode,
279 const TargetRegisterClass* RC) {
280 unsigned ResultReg = createResultReg(RC);
281 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
283 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg));
287 unsigned ARMFastISel::FastEmitInst_r(unsigned MachineInstOpcode,
288 const TargetRegisterClass *RC,
289 unsigned Op0, bool Op0IsKill) {
290 unsigned ResultReg = createResultReg(RC);
291 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
293 if (II.getNumDefs() >= 1)
294 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
295 .addReg(Op0, Op0IsKill * RegState::Kill));
297 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
298 .addReg(Op0, Op0IsKill * RegState::Kill));
299 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
300 TII.get(TargetOpcode::COPY), ResultReg)
301 .addReg(II.ImplicitDefs[0]));
306 unsigned ARMFastISel::FastEmitInst_rr(unsigned MachineInstOpcode,
307 const TargetRegisterClass *RC,
308 unsigned Op0, bool Op0IsKill,
309 unsigned Op1, bool Op1IsKill) {
310 unsigned ResultReg = createResultReg(RC);
311 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
313 if (II.getNumDefs() >= 1)
314 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
315 .addReg(Op0, Op0IsKill * RegState::Kill)
316 .addReg(Op1, Op1IsKill * RegState::Kill));
318 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
319 .addReg(Op0, Op0IsKill * RegState::Kill)
320 .addReg(Op1, Op1IsKill * RegState::Kill));
321 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
322 TII.get(TargetOpcode::COPY), ResultReg)
323 .addReg(II.ImplicitDefs[0]));
328 unsigned ARMFastISel::FastEmitInst_rrr(unsigned MachineInstOpcode,
329 const TargetRegisterClass *RC,
330 unsigned Op0, bool Op0IsKill,
331 unsigned Op1, bool Op1IsKill,
332 unsigned Op2, bool Op2IsKill) {
333 unsigned ResultReg = createResultReg(RC);
334 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
336 if (II.getNumDefs() >= 1)
337 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
338 .addReg(Op0, Op0IsKill * RegState::Kill)
339 .addReg(Op1, Op1IsKill * RegState::Kill)
340 .addReg(Op2, Op2IsKill * RegState::Kill));
342 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
343 .addReg(Op0, Op0IsKill * RegState::Kill)
344 .addReg(Op1, Op1IsKill * RegState::Kill)
345 .addReg(Op2, Op2IsKill * RegState::Kill));
346 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
347 TII.get(TargetOpcode::COPY), ResultReg)
348 .addReg(II.ImplicitDefs[0]));
353 unsigned ARMFastISel::FastEmitInst_ri(unsigned MachineInstOpcode,
354 const TargetRegisterClass *RC,
355 unsigned Op0, bool Op0IsKill,
357 unsigned ResultReg = createResultReg(RC);
358 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
360 if (II.getNumDefs() >= 1)
361 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
362 .addReg(Op0, Op0IsKill * RegState::Kill)
365 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
366 .addReg(Op0, Op0IsKill * RegState::Kill)
368 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
369 TII.get(TargetOpcode::COPY), ResultReg)
370 .addReg(II.ImplicitDefs[0]));
375 unsigned ARMFastISel::FastEmitInst_rf(unsigned MachineInstOpcode,
376 const TargetRegisterClass *RC,
377 unsigned Op0, bool Op0IsKill,
378 const ConstantFP *FPImm) {
379 unsigned ResultReg = createResultReg(RC);
380 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
382 if (II.getNumDefs() >= 1)
383 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
384 .addReg(Op0, Op0IsKill * RegState::Kill)
387 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
388 .addReg(Op0, Op0IsKill * RegState::Kill)
390 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
391 TII.get(TargetOpcode::COPY), ResultReg)
392 .addReg(II.ImplicitDefs[0]));
397 unsigned ARMFastISel::FastEmitInst_rri(unsigned MachineInstOpcode,
398 const TargetRegisterClass *RC,
399 unsigned Op0, bool Op0IsKill,
400 unsigned Op1, bool Op1IsKill,
402 unsigned ResultReg = createResultReg(RC);
403 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
405 if (II.getNumDefs() >= 1)
406 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
407 .addReg(Op0, Op0IsKill * RegState::Kill)
408 .addReg(Op1, Op1IsKill * RegState::Kill)
411 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
412 .addReg(Op0, Op0IsKill * RegState::Kill)
413 .addReg(Op1, Op1IsKill * RegState::Kill)
415 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
416 TII.get(TargetOpcode::COPY), ResultReg)
417 .addReg(II.ImplicitDefs[0]));
422 unsigned ARMFastISel::FastEmitInst_i(unsigned MachineInstOpcode,
423 const TargetRegisterClass *RC,
425 unsigned ResultReg = createResultReg(RC);
426 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
428 if (II.getNumDefs() >= 1)
429 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
432 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
434 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
435 TII.get(TargetOpcode::COPY), ResultReg)
436 .addReg(II.ImplicitDefs[0]));
441 unsigned ARMFastISel::FastEmitInst_ii(unsigned MachineInstOpcode,
442 const TargetRegisterClass *RC,
443 uint64_t Imm1, uint64_t Imm2) {
444 unsigned ResultReg = createResultReg(RC);
445 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
447 if (II.getNumDefs() >= 1)
448 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg)
449 .addImm(Imm1).addImm(Imm2));
451 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
452 .addImm(Imm1).addImm(Imm2));
453 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
454 TII.get(TargetOpcode::COPY),
456 .addReg(II.ImplicitDefs[0]));
461 unsigned ARMFastISel::FastEmitInst_extractsubreg(MVT RetVT,
462 unsigned Op0, bool Op0IsKill,
464 unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT));
465 assert(TargetRegisterInfo::isVirtualRegister(Op0) &&
466 "Cannot yet extract from physregs");
467 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt,
468 DL, TII.get(TargetOpcode::COPY), ResultReg)
469 .addReg(Op0, getKillRegState(Op0IsKill), Idx));
473 // TODO: Don't worry about 64-bit now, but when this is fixed remove the
474 // checks from the various callers.
475 unsigned ARMFastISel::ARMMoveToFPReg(EVT VT, unsigned SrcReg) {
476 if (VT == MVT::f64) return 0;
478 unsigned MoveReg = createResultReg(TLI.getRegClassFor(VT));
479 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
480 TII.get(ARM::VMOVRS), MoveReg)
485 unsigned ARMFastISel::ARMMoveToIntReg(EVT VT, unsigned SrcReg) {
486 if (VT == MVT::i64) return 0;
488 unsigned MoveReg = createResultReg(TLI.getRegClassFor(VT));
489 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
490 TII.get(ARM::VMOVSR), MoveReg)
495 // For double width floating point we need to materialize two constants
496 // (the high and the low) into integer registers then use a move to get
497 // the combined constant into an FP reg.
498 unsigned ARMFastISel::ARMMaterializeFP(const ConstantFP *CFP, EVT VT) {
499 const APFloat Val = CFP->getValueAPF();
500 bool is64bit = VT == MVT::f64;
502 // This checks to see if we can use VFP3 instructions to materialize
503 // a constant, otherwise we have to go through the constant pool.
504 if (TLI.isFPImmLegal(Val, VT)) {
505 unsigned Opc = is64bit ? ARM::FCONSTD : ARM::FCONSTS;
506 unsigned DestReg = createResultReg(TLI.getRegClassFor(VT));
507 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc),
513 // Require VFP2 for loading fp constants.
514 if (!Subtarget->hasVFP2()) return false;
516 // MachineConstantPool wants an explicit alignment.
517 unsigned Align = TD.getPrefTypeAlignment(CFP->getType());
519 // TODO: Figure out if this is correct.
520 Align = TD.getTypeAllocSize(CFP->getType());
522 unsigned Idx = MCP.getConstantPoolIndex(cast<Constant>(CFP), Align);
523 unsigned DestReg = createResultReg(TLI.getRegClassFor(VT));
524 unsigned Opc = is64bit ? ARM::VLDRD : ARM::VLDRS;
526 // The extra reg is for addrmode5.
527 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc),
529 .addConstantPoolIndex(Idx)
534 unsigned ARMFastISel::ARMMaterializeInt(const Constant *C, EVT VT) {
536 // For now 32-bit only.
537 if (VT != MVT::i32) return false;
539 unsigned DestReg = createResultReg(TLI.getRegClassFor(VT));
541 // If we can do this in a single instruction without a constant pool entry
543 const ConstantInt *CI = cast<ConstantInt>(C);
544 if (Subtarget->hasV6T2Ops() && isUInt<16>(CI->getSExtValue())) {
545 unsigned Opc = isThumb ? ARM::t2MOVi16 : ARM::MOVi16;
546 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
547 TII.get(Opc), DestReg)
548 .addImm(CI->getSExtValue()));
552 // MachineConstantPool wants an explicit alignment.
553 unsigned Align = TD.getPrefTypeAlignment(C->getType());
555 // TODO: Figure out if this is correct.
556 Align = TD.getTypeAllocSize(C->getType());
558 unsigned Idx = MCP.getConstantPoolIndex(C, Align);
561 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
562 TII.get(ARM::t2LDRpci), DestReg)
563 .addConstantPoolIndex(Idx));
565 // The extra immediate is for addrmode2.
566 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
567 TII.get(ARM::LDRcp), DestReg)
568 .addConstantPoolIndex(Idx)
574 unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, EVT VT) {
575 // For now 32-bit only.
576 if (VT != MVT::i32) return 0;
578 Reloc::Model RelocM = TM.getRelocationModel();
580 // TODO: No external globals for now.
581 if (Subtarget->GVIsIndirectSymbol(GV, RelocM)) return 0;
583 // TODO: Need more magic for ARM PIC.
584 if (!isThumb && (RelocM == Reloc::PIC_)) return 0;
586 // MachineConstantPool wants an explicit alignment.
587 unsigned Align = TD.getPrefTypeAlignment(GV->getType());
589 // TODO: Figure out if this is correct.
590 Align = TD.getTypeAllocSize(GV->getType());
594 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb() ? 4 : 8);
595 unsigned Id = AFI->createPICLabelUId();
596 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, Id,
597 ARMCP::CPValue, PCAdj);
598 unsigned Idx = MCP.getConstantPoolIndex(CPV, Align);
601 MachineInstrBuilder MIB;
602 unsigned DestReg = createResultReg(TLI.getRegClassFor(VT));
604 unsigned Opc = (RelocM != Reloc::PIC_) ? ARM::t2LDRpci : ARM::t2LDRpci_pic;
605 MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc), DestReg)
606 .addConstantPoolIndex(Idx);
607 if (RelocM == Reloc::PIC_)
610 // The extra immediate is for addrmode2.
611 MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(ARM::LDRcp),
613 .addConstantPoolIndex(Idx)
616 AddOptionalDefs(MIB);
620 unsigned ARMFastISel::TargetMaterializeConstant(const Constant *C) {
621 EVT VT = TLI.getValueType(C->getType(), true);
623 // Only handle simple types.
624 if (!VT.isSimple()) return 0;
626 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
627 return ARMMaterializeFP(CFP, VT);
628 else if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
629 return ARMMaterializeGV(GV, VT);
630 else if (isa<ConstantInt>(C))
631 return ARMMaterializeInt(C, VT);
636 unsigned ARMFastISel::TargetMaterializeAlloca(const AllocaInst *AI) {
637 // Don't handle dynamic allocas.
638 if (!FuncInfo.StaticAllocaMap.count(AI)) return 0;
641 if (!isLoadTypeLegal(AI->getType(), VT)) return false;
643 DenseMap<const AllocaInst*, int>::iterator SI =
644 FuncInfo.StaticAllocaMap.find(AI);
646 // This will get lowered later into the correct offsets and registers
647 // via rewriteXFrameIndex.
648 if (SI != FuncInfo.StaticAllocaMap.end()) {
649 TargetRegisterClass* RC = TLI.getRegClassFor(VT);
650 unsigned ResultReg = createResultReg(RC);
651 unsigned Opc = isThumb ? ARM::t2ADDri : ARM::ADDri;
652 AddOptionalDefs(BuildMI(*FuncInfo.MBB, *FuncInfo.InsertPt, DL,
653 TII.get(Opc), ResultReg)
654 .addFrameIndex(SI->second)
662 bool ARMFastISel::isTypeLegal(const Type *Ty, MVT &VT) {
663 EVT evt = TLI.getValueType(Ty, true);
665 // Only handle simple types.
666 if (evt == MVT::Other || !evt.isSimple()) return false;
667 VT = evt.getSimpleVT();
669 // Handle all legal types, i.e. a register that will directly hold this
671 return TLI.isTypeLegal(VT);
674 bool ARMFastISel::isLoadTypeLegal(const Type *Ty, MVT &VT) {
675 if (isTypeLegal(Ty, VT)) return true;
677 // If this is a type than can be sign or zero-extended to a basic operation
678 // go ahead and accept it now.
679 if (VT == MVT::i8 || VT == MVT::i16)
685 // Computes the address to get to an object.
686 bool ARMFastISel::ARMComputeAddress(const Value *Obj, Address &Addr) {
687 // Some boilerplate from the X86 FastISel.
688 const User *U = NULL;
689 unsigned Opcode = Instruction::UserOp1;
690 if (const Instruction *I = dyn_cast<Instruction>(Obj)) {
691 // Don't walk into other basic blocks unless the object is an alloca from
692 // another block, otherwise it may not have a virtual register assigned.
693 if (FuncInfo.StaticAllocaMap.count(static_cast<const AllocaInst *>(Obj)) ||
694 FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) {
695 Opcode = I->getOpcode();
698 } else if (const ConstantExpr *C = dyn_cast<ConstantExpr>(Obj)) {
699 Opcode = C->getOpcode();
703 if (const PointerType *Ty = dyn_cast<PointerType>(Obj->getType()))
704 if (Ty->getAddressSpace() > 255)
705 // Fast instruction selection doesn't support the special
712 case Instruction::BitCast: {
713 // Look through bitcasts.
714 return ARMComputeAddress(U->getOperand(0), Addr);
716 case Instruction::IntToPtr: {
717 // Look past no-op inttoptrs.
718 if (TLI.getValueType(U->getOperand(0)->getType()) == TLI.getPointerTy())
719 return ARMComputeAddress(U->getOperand(0), Addr);
722 case Instruction::PtrToInt: {
723 // Look past no-op ptrtoints.
724 if (TLI.getValueType(U->getType()) == TLI.getPointerTy())
725 return ARMComputeAddress(U->getOperand(0), Addr);
728 case Instruction::GetElementPtr: {
729 Address SavedAddr = Addr;
730 int TmpOffset = Addr.Offset;
732 // Iterate through the GEP folding the constants into offsets where
734 gep_type_iterator GTI = gep_type_begin(U);
735 for (User::const_op_iterator i = U->op_begin() + 1, e = U->op_end();
736 i != e; ++i, ++GTI) {
737 const Value *Op = *i;
738 if (const StructType *STy = dyn_cast<StructType>(*GTI)) {
739 const StructLayout *SL = TD.getStructLayout(STy);
740 unsigned Idx = cast<ConstantInt>(Op)->getZExtValue();
741 TmpOffset += SL->getElementOffset(Idx);
743 uint64_t S = TD.getTypeAllocSize(GTI.getIndexedType());
745 if (const ConstantInt *CI = dyn_cast<ConstantInt>(Op)) {
746 // Constant-offset addressing.
747 TmpOffset += CI->getSExtValue() * S;
750 if (isa<AddOperator>(Op) &&
751 (!isa<Instruction>(Op) ||
752 FuncInfo.MBBMap[cast<Instruction>(Op)->getParent()]
754 isa<ConstantInt>(cast<AddOperator>(Op)->getOperand(1))) {
755 // An add (in the same block) with a constant operand. Fold the
758 cast<ConstantInt>(cast<AddOperator>(Op)->getOperand(1));
759 TmpOffset += CI->getSExtValue() * S;
760 // Iterate on the other operand.
761 Op = cast<AddOperator>(Op)->getOperand(0);
765 goto unsupported_gep;
770 // Try to grab the base operand now.
771 Addr.Offset = TmpOffset;
772 if (ARMComputeAddress(U->getOperand(0), Addr)) return true;
774 // We failed, restore everything and try the other options.
780 case Instruction::Alloca: {
781 const AllocaInst *AI = cast<AllocaInst>(Obj);
782 DenseMap<const AllocaInst*, int>::iterator SI =
783 FuncInfo.StaticAllocaMap.find(AI);
784 if (SI != FuncInfo.StaticAllocaMap.end()) {
785 Addr.BaseType = Address::FrameIndexBase;
786 Addr.Base.FI = SI->second;
793 // Materialize the global variable's address into a reg which can
794 // then be used later to load the variable.
795 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Obj)) {
796 unsigned Tmp = ARMMaterializeGV(GV, TLI.getValueType(Obj->getType()));
797 if (Tmp == 0) return false;
803 // Try to get this in a register if nothing else has worked.
804 if (Addr.Base.Reg == 0) Addr.Base.Reg = getRegForValue(Obj);
805 return Addr.Base.Reg != 0;
808 void ARMFastISel::ARMSimplifyAddress(Address &Addr, EVT VT) {
810 assert(VT.isSimple() && "Non-simple types are invalid here!");
812 bool needsLowering = false;
813 switch (VT.getSimpleVT().SimpleTy) {
815 assert(false && "Unhandled load/store type!");
820 // Integer loads/stores handle 12-bit offsets.
821 needsLowering = ((Addr.Offset & 0xfff) != Addr.Offset);
825 // Floating point operands handle 8-bit offsets.
826 needsLowering = ((Addr.Offset & 0xff) != Addr.Offset);
830 // If this is a stack pointer and the offset needs to be simplified then
831 // put the alloca address into a register, set the base type back to
832 // register and continue. This should almost never happen.
833 if (needsLowering && Addr.BaseType == Address::FrameIndexBase) {
834 TargetRegisterClass *RC = isThumb ? ARM::tGPRRegisterClass :
835 ARM::GPRRegisterClass;
836 unsigned ResultReg = createResultReg(RC);
837 unsigned Opc = isThumb ? ARM::t2ADDri : ARM::ADDri;
838 AddOptionalDefs(BuildMI(*FuncInfo.MBB, *FuncInfo.InsertPt, DL,
839 TII.get(Opc), ResultReg)
840 .addFrameIndex(Addr.Base.FI)
842 Addr.Base.Reg = ResultReg;
843 Addr.BaseType = Address::RegBase;
846 // Since the offset is too large for the load/store instruction
847 // get the reg+offset into a register.
849 Addr.Base.Reg = FastEmit_ri_(MVT::i32, ISD::ADD, Addr.Base.Reg,
850 /*Op0IsKill*/false, Addr.Offset, MVT::i32);
855 void ARMFastISel::AddLoadStoreOperands(EVT VT, Address &Addr,
856 const MachineInstrBuilder &MIB) {
857 // addrmode5 output depends on the selection dag addressing dividing the
858 // offset by 4 that it then later multiplies. Do this here as well.
859 if (VT.getSimpleVT().SimpleTy == MVT::f32 ||
860 VT.getSimpleVT().SimpleTy == MVT::f64)
863 // Frame base works a bit differently. Handle it separately.
864 if (Addr.BaseType == Address::FrameIndexBase) {
865 int FI = Addr.Base.FI;
866 int Offset = Addr.Offset;
867 MachineMemOperand *MMO =
868 FuncInfo.MF->getMachineMemOperand(
869 MachinePointerInfo::getFixedStack(FI, Offset),
870 MachineMemOperand::MOLoad,
871 MFI.getObjectSize(FI),
872 MFI.getObjectAlignment(FI));
873 // Now add the rest of the operands.
874 MIB.addFrameIndex(FI);
876 // ARM halfword load/stores need an additional operand.
877 if (!isThumb && VT.getSimpleVT().SimpleTy == MVT::i16) MIB.addReg(0);
879 MIB.addImm(Addr.Offset);
880 MIB.addMemOperand(MMO);
882 // Now add the rest of the operands.
883 MIB.addReg(Addr.Base.Reg);
885 // ARM halfword load/stores need an additional operand.
886 if (!isThumb && VT.getSimpleVT().SimpleTy == MVT::i16) MIB.addReg(0);
888 MIB.addImm(Addr.Offset);
890 AddOptionalDefs(MIB);
893 bool ARMFastISel::ARMEmitLoad(EVT VT, unsigned &ResultReg, Address &Addr) {
895 assert(VT.isSimple() && "Non-simple types are invalid here!");
897 TargetRegisterClass *RC;
898 switch (VT.getSimpleVT().SimpleTy) {
899 // This is mostly going to be Neon/vector support.
900 default: return false;
902 Opc = isThumb ? ARM::t2LDRHi12 : ARM::LDRH;
903 RC = ARM::GPRRegisterClass;
906 Opc = isThumb ? ARM::t2LDRBi12 : ARM::LDRBi12;
907 RC = ARM::GPRRegisterClass;
910 Opc = isThumb ? ARM::t2LDRi12 : ARM::LDRi12;
911 RC = ARM::GPRRegisterClass;
915 RC = TLI.getRegClassFor(VT);
919 RC = TLI.getRegClassFor(VT);
922 // Simplify this down to something we can handle.
923 ARMSimplifyAddress(Addr, VT);
925 // Create the base instruction, then add the operands.
926 ResultReg = createResultReg(RC);
927 MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
928 TII.get(Opc), ResultReg);
929 AddLoadStoreOperands(VT, Addr, MIB);
933 bool ARMFastISel::SelectLoad(const Instruction *I) {
934 // Verify we have a legal type before going any further.
936 if (!isLoadTypeLegal(I->getType(), VT))
939 // See if we can handle this address.
941 if (!ARMComputeAddress(I->getOperand(0), Addr)) return false;
944 if (!ARMEmitLoad(VT, ResultReg, Addr)) return false;
945 UpdateValueMap(I, ResultReg);
949 bool ARMFastISel::ARMEmitStore(EVT VT, unsigned SrcReg, Address &Addr) {
951 switch (VT.getSimpleVT().SimpleTy) {
952 // This is mostly going to be Neon/vector support.
953 default: return false;
955 unsigned Res = createResultReg(isThumb ? ARM::tGPRRegisterClass :
956 ARM::GPRRegisterClass);
957 unsigned Opc = isThumb ? ARM::t2ANDri : ARM::ANDri;
958 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
960 .addReg(SrcReg).addImm(1));
962 } // Fallthrough here.
964 StrOpc = isThumb ? ARM::t2STRBi12 : ARM::STRBi12;
967 StrOpc = isThumb ? ARM::t2STRHi12 : ARM::STRH;
970 StrOpc = isThumb ? ARM::t2STRi12 : ARM::STRi12;
973 if (!Subtarget->hasVFP2()) return false;
977 if (!Subtarget->hasVFP2()) return false;
981 // Simplify this down to something we can handle.
982 ARMSimplifyAddress(Addr, VT);
984 // Create the base instruction, then add the operands.
985 MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
987 .addReg(SrcReg, getKillRegState(true));
988 AddLoadStoreOperands(VT, Addr, MIB);
992 bool ARMFastISel::SelectStore(const Instruction *I) {
993 Value *Op0 = I->getOperand(0);
996 // Verify we have a legal type before going any further.
998 if (!isLoadTypeLegal(I->getOperand(0)->getType(), VT))
1001 // Get the value to be stored into a register.
1002 SrcReg = getRegForValue(Op0);
1003 if (SrcReg == 0) return false;
1005 // See if we can handle this address.
1007 if (!ARMComputeAddress(I->getOperand(1), Addr))
1010 if (!ARMEmitStore(VT, SrcReg, Addr)) return false;
1014 static ARMCC::CondCodes getComparePred(CmpInst::Predicate Pred) {
1016 // Needs two compares...
1017 case CmpInst::FCMP_ONE:
1018 case CmpInst::FCMP_UEQ:
1020 // AL is our "false" for now. The other two need more compares.
1022 case CmpInst::ICMP_EQ:
1023 case CmpInst::FCMP_OEQ:
1025 case CmpInst::ICMP_SGT:
1026 case CmpInst::FCMP_OGT:
1028 case CmpInst::ICMP_SGE:
1029 case CmpInst::FCMP_OGE:
1031 case CmpInst::ICMP_UGT:
1032 case CmpInst::FCMP_UGT:
1034 case CmpInst::FCMP_OLT:
1036 case CmpInst::ICMP_ULE:
1037 case CmpInst::FCMP_OLE:
1039 case CmpInst::FCMP_ORD:
1041 case CmpInst::FCMP_UNO:
1043 case CmpInst::FCMP_UGE:
1045 case CmpInst::ICMP_SLT:
1046 case CmpInst::FCMP_ULT:
1048 case CmpInst::ICMP_SLE:
1049 case CmpInst::FCMP_ULE:
1051 case CmpInst::FCMP_UNE:
1052 case CmpInst::ICMP_NE:
1054 case CmpInst::ICMP_UGE:
1056 case CmpInst::ICMP_ULT:
1061 bool ARMFastISel::SelectBranch(const Instruction *I) {
1062 const BranchInst *BI = cast<BranchInst>(I);
1063 MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)];
1064 MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)];
1066 // Simple branch support.
1068 // If we can, avoid recomputing the compare - redoing it could lead to wonky
1070 // TODO: Factor this out.
1071 if (const CmpInst *CI = dyn_cast<CmpInst>(BI->getCondition())) {
1073 const Type *Ty = CI->getOperand(0)->getType();
1074 if (CI->hasOneUse() && (CI->getParent() == I->getParent())
1075 && isTypeLegal(Ty, SourceVT)) {
1076 bool isFloat = (Ty->isDoubleTy() || Ty->isFloatTy());
1077 if (isFloat && !Subtarget->hasVFP2())
1081 switch (SourceVT.SimpleTy) {
1082 default: return false;
1083 // TODO: Verify compares.
1085 CmpOpc = ARM::VCMPES;
1088 CmpOpc = ARM::VCMPED;
1091 CmpOpc = isThumb ? ARM::t2CMPrr : ARM::CMPrr;
1095 // Get the compare predicate.
1096 // Try to take advantage of fallthrough opportunities.
1097 CmpInst::Predicate Predicate = CI->getPredicate();
1098 if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
1099 std::swap(TBB, FBB);
1100 Predicate = CmpInst::getInversePredicate(Predicate);
1103 ARMCC::CondCodes ARMPred = getComparePred(Predicate);
1105 // We may not handle every CC for now.
1106 if (ARMPred == ARMCC::AL) return false;
1108 unsigned Arg1 = getRegForValue(CI->getOperand(0));
1109 if (Arg1 == 0) return false;
1111 unsigned Arg2 = getRegForValue(CI->getOperand(1));
1112 if (Arg2 == 0) return false;
1114 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1116 .addReg(Arg1).addReg(Arg2));
1118 // For floating point we need to move the result to a comparison register
1119 // that we can then use for branches.
1121 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1122 TII.get(ARM::FMSTAT)));
1124 unsigned BrOpc = isThumb ? ARM::t2Bcc : ARM::Bcc;
1125 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(BrOpc))
1126 .addMBB(TBB).addImm(ARMPred).addReg(ARM::CPSR);
1127 FastEmitBranch(FBB, DL);
1128 FuncInfo.MBB->addSuccessor(TBB);
1131 } else if (TruncInst *TI = dyn_cast<TruncInst>(BI->getCondition())) {
1133 if (TI->hasOneUse() && TI->getParent() == I->getParent() &&
1134 (isTypeLegal(TI->getOperand(0)->getType(), SourceVT))) {
1135 unsigned TstOpc = isThumb ? ARM::t2TSTri : ARM::TSTri;
1136 unsigned OpReg = getRegForValue(TI->getOperand(0));
1137 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1139 .addReg(OpReg).addImm(1));
1141 unsigned CCMode = ARMCC::NE;
1142 if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
1143 std::swap(TBB, FBB);
1147 unsigned BrOpc = isThumb ? ARM::t2Bcc : ARM::Bcc;
1148 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(BrOpc))
1149 .addMBB(TBB).addImm(CCMode).addReg(ARM::CPSR);
1151 FastEmitBranch(FBB, DL);
1152 FuncInfo.MBB->addSuccessor(TBB);
1157 unsigned CmpReg = getRegForValue(BI->getCondition());
1158 if (CmpReg == 0) return false;
1160 // We've been divorced from our compare! Our block was split, and
1161 // now our compare lives in a predecessor block. We musn't
1162 // re-compare here, as the children of the compare aren't guaranteed
1163 // live across the block boundary (we *could* check for this).
1164 // Regardless, the compare has been done in the predecessor block,
1165 // and it left a value for us in a virtual register. Ergo, we test
1166 // the one-bit value left in the virtual register.
1167 unsigned TstOpc = isThumb ? ARM::t2TSTri : ARM::TSTri;
1168 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TstOpc))
1169 .addReg(CmpReg).addImm(1));
1171 unsigned CCMode = ARMCC::NE;
1172 if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
1173 std::swap(TBB, FBB);
1177 unsigned BrOpc = isThumb ? ARM::t2Bcc : ARM::Bcc;
1178 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(BrOpc))
1179 .addMBB(TBB).addImm(CCMode).addReg(ARM::CPSR);
1180 FastEmitBranch(FBB, DL);
1181 FuncInfo.MBB->addSuccessor(TBB);
1185 bool ARMFastISel::SelectCmp(const Instruction *I) {
1186 const CmpInst *CI = cast<CmpInst>(I);
1189 const Type *Ty = CI->getOperand(0)->getType();
1190 if (!isTypeLegal(Ty, VT))
1193 bool isFloat = (Ty->isDoubleTy() || Ty->isFloatTy());
1194 if (isFloat && !Subtarget->hasVFP2())
1199 switch (VT.SimpleTy) {
1200 default: return false;
1201 // TODO: Verify compares.
1203 CmpOpc = ARM::VCMPES;
1204 CondReg = ARM::FPSCR;
1207 CmpOpc = ARM::VCMPED;
1208 CondReg = ARM::FPSCR;
1211 CmpOpc = isThumb ? ARM::t2CMPrr : ARM::CMPrr;
1212 CondReg = ARM::CPSR;
1216 // Get the compare predicate.
1217 ARMCC::CondCodes ARMPred = getComparePred(CI->getPredicate());
1219 // We may not handle every CC for now.
1220 if (ARMPred == ARMCC::AL) return false;
1222 unsigned Arg1 = getRegForValue(CI->getOperand(0));
1223 if (Arg1 == 0) return false;
1225 unsigned Arg2 = getRegForValue(CI->getOperand(1));
1226 if (Arg2 == 0) return false;
1228 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(CmpOpc))
1229 .addReg(Arg1).addReg(Arg2));
1231 // For floating point we need to move the result to a comparison register
1232 // that we can then use for branches.
1234 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1235 TII.get(ARM::FMSTAT)));
1237 // Now set a register based on the comparison. Explicitly set the predicates
1239 unsigned MovCCOpc = isThumb ? ARM::t2MOVCCi : ARM::MOVCCi;
1240 TargetRegisterClass *RC = isThumb ? ARM::rGPRRegisterClass
1241 : ARM::GPRRegisterClass;
1242 unsigned DestReg = createResultReg(RC);
1244 = ConstantInt::get(Type::getInt32Ty(*Context), 0);
1245 unsigned ZeroReg = TargetMaterializeConstant(Zero);
1246 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(MovCCOpc), DestReg)
1247 .addReg(ZeroReg).addImm(1)
1248 .addImm(ARMPred).addReg(CondReg);
1250 UpdateValueMap(I, DestReg);
1254 bool ARMFastISel::SelectFPExt(const Instruction *I) {
1255 // Make sure we have VFP and that we're extending float to double.
1256 if (!Subtarget->hasVFP2()) return false;
1258 Value *V = I->getOperand(0);
1259 if (!I->getType()->isDoubleTy() ||
1260 !V->getType()->isFloatTy()) return false;
1262 unsigned Op = getRegForValue(V);
1263 if (Op == 0) return false;
1265 unsigned Result = createResultReg(ARM::DPRRegisterClass);
1266 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1267 TII.get(ARM::VCVTDS), Result)
1269 UpdateValueMap(I, Result);
1273 bool ARMFastISel::SelectFPTrunc(const Instruction *I) {
1274 // Make sure we have VFP and that we're truncating double to float.
1275 if (!Subtarget->hasVFP2()) return false;
1277 Value *V = I->getOperand(0);
1278 if (!(I->getType()->isFloatTy() &&
1279 V->getType()->isDoubleTy())) return false;
1281 unsigned Op = getRegForValue(V);
1282 if (Op == 0) return false;
1284 unsigned Result = createResultReg(ARM::SPRRegisterClass);
1285 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1286 TII.get(ARM::VCVTSD), Result)
1288 UpdateValueMap(I, Result);
1292 bool ARMFastISel::SelectSIToFP(const Instruction *I) {
1293 // Make sure we have VFP.
1294 if (!Subtarget->hasVFP2()) return false;
1297 const Type *Ty = I->getType();
1298 if (!isTypeLegal(Ty, DstVT))
1301 unsigned Op = getRegForValue(I->getOperand(0));
1302 if (Op == 0) return false;
1304 // The conversion routine works on fp-reg to fp-reg and the operand above
1305 // was an integer, move it to the fp registers if possible.
1306 unsigned FP = ARMMoveToFPReg(MVT::f32, Op);
1307 if (FP == 0) return false;
1310 if (Ty->isFloatTy()) Opc = ARM::VSITOS;
1311 else if (Ty->isDoubleTy()) Opc = ARM::VSITOD;
1314 unsigned ResultReg = createResultReg(TLI.getRegClassFor(DstVT));
1315 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc),
1318 UpdateValueMap(I, ResultReg);
1322 bool ARMFastISel::SelectFPToSI(const Instruction *I) {
1323 // Make sure we have VFP.
1324 if (!Subtarget->hasVFP2()) return false;
1327 const Type *RetTy = I->getType();
1328 if (!isTypeLegal(RetTy, DstVT))
1331 unsigned Op = getRegForValue(I->getOperand(0));
1332 if (Op == 0) return false;
1335 const Type *OpTy = I->getOperand(0)->getType();
1336 if (OpTy->isFloatTy()) Opc = ARM::VTOSIZS;
1337 else if (OpTy->isDoubleTy()) Opc = ARM::VTOSIZD;
1340 // f64->s32 or f32->s32 both need an intermediate f32 reg.
1341 unsigned ResultReg = createResultReg(TLI.getRegClassFor(MVT::f32));
1342 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc),
1346 // This result needs to be in an integer register, but the conversion only
1347 // takes place in fp-regs.
1348 unsigned IntReg = ARMMoveToIntReg(DstVT, ResultReg);
1349 if (IntReg == 0) return false;
1351 UpdateValueMap(I, IntReg);
1355 bool ARMFastISel::SelectSelect(const Instruction *I) {
1357 if (!isTypeLegal(I->getType(), VT))
1360 // Things need to be register sized for register moves.
1361 if (VT != MVT::i32) return false;
1362 const TargetRegisterClass *RC = TLI.getRegClassFor(VT);
1364 unsigned CondReg = getRegForValue(I->getOperand(0));
1365 if (CondReg == 0) return false;
1366 unsigned Op1Reg = getRegForValue(I->getOperand(1));
1367 if (Op1Reg == 0) return false;
1368 unsigned Op2Reg = getRegForValue(I->getOperand(2));
1369 if (Op2Reg == 0) return false;
1371 unsigned CmpOpc = isThumb ? ARM::t2TSTri : ARM::TSTri;
1372 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(CmpOpc))
1373 .addReg(CondReg).addImm(1));
1374 unsigned ResultReg = createResultReg(RC);
1375 unsigned MovCCOpc = isThumb ? ARM::t2MOVCCr : ARM::MOVCCr;
1376 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(MovCCOpc), ResultReg)
1377 .addReg(Op1Reg).addReg(Op2Reg)
1378 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
1379 UpdateValueMap(I, ResultReg);
1383 bool ARMFastISel::SelectSDiv(const Instruction *I) {
1385 const Type *Ty = I->getType();
1386 if (!isTypeLegal(Ty, VT))
1389 // If we have integer div support we should have selected this automagically.
1390 // In case we have a real miss go ahead and return false and we'll pick
1392 if (Subtarget->hasDivide()) return false;
1394 // Otherwise emit a libcall.
1395 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1397 LC = RTLIB::SDIV_I8;
1398 else if (VT == MVT::i16)
1399 LC = RTLIB::SDIV_I16;
1400 else if (VT == MVT::i32)
1401 LC = RTLIB::SDIV_I32;
1402 else if (VT == MVT::i64)
1403 LC = RTLIB::SDIV_I64;
1404 else if (VT == MVT::i128)
1405 LC = RTLIB::SDIV_I128;
1406 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SDIV!");
1408 return ARMEmitLibcall(I, LC);
1411 bool ARMFastISel::SelectSRem(const Instruction *I) {
1413 const Type *Ty = I->getType();
1414 if (!isTypeLegal(Ty, VT))
1417 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1419 LC = RTLIB::SREM_I8;
1420 else if (VT == MVT::i16)
1421 LC = RTLIB::SREM_I16;
1422 else if (VT == MVT::i32)
1423 LC = RTLIB::SREM_I32;
1424 else if (VT == MVT::i64)
1425 LC = RTLIB::SREM_I64;
1426 else if (VT == MVT::i128)
1427 LC = RTLIB::SREM_I128;
1428 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SREM!");
1430 return ARMEmitLibcall(I, LC);
1433 bool ARMFastISel::SelectBinaryOp(const Instruction *I, unsigned ISDOpcode) {
1434 EVT VT = TLI.getValueType(I->getType(), true);
1436 // We can get here in the case when we want to use NEON for our fp
1437 // operations, but can't figure out how to. Just use the vfp instructions
1439 // FIXME: It'd be nice to use NEON instructions.
1440 const Type *Ty = I->getType();
1441 bool isFloat = (Ty->isDoubleTy() || Ty->isFloatTy());
1442 if (isFloat && !Subtarget->hasVFP2())
1445 unsigned Op1 = getRegForValue(I->getOperand(0));
1446 if (Op1 == 0) return false;
1448 unsigned Op2 = getRegForValue(I->getOperand(1));
1449 if (Op2 == 0) return false;
1452 bool is64bit = VT == MVT::f64 || VT == MVT::i64;
1453 switch (ISDOpcode) {
1454 default: return false;
1456 Opc = is64bit ? ARM::VADDD : ARM::VADDS;
1459 Opc = is64bit ? ARM::VSUBD : ARM::VSUBS;
1462 Opc = is64bit ? ARM::VMULD : ARM::VMULS;
1465 unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT));
1466 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1467 TII.get(Opc), ResultReg)
1468 .addReg(Op1).addReg(Op2));
1469 UpdateValueMap(I, ResultReg);
1473 // Call Handling Code
1475 bool ARMFastISel::FastEmitExtend(ISD::NodeType Opc, EVT DstVT, unsigned Src,
1476 EVT SrcVT, unsigned &ResultReg) {
1477 unsigned RR = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), Opc,
1478 Src, /*TODO: Kill=*/false);
1487 // This is largely taken directly from CCAssignFnForNode - we don't support
1488 // varargs in FastISel so that part has been removed.
1489 // TODO: We may not support all of this.
1490 CCAssignFn *ARMFastISel::CCAssignFnForCall(CallingConv::ID CC, bool Return) {
1493 llvm_unreachable("Unsupported calling convention");
1494 case CallingConv::Fast:
1495 // Ignore fastcc. Silence compiler warnings.
1496 (void)RetFastCC_ARM_APCS;
1497 (void)FastCC_ARM_APCS;
1499 case CallingConv::C:
1500 // Use target triple & subtarget features to do actual dispatch.
1501 if (Subtarget->isAAPCS_ABI()) {
1502 if (Subtarget->hasVFP2() &&
1503 FloatABIType == FloatABI::Hard)
1504 return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
1506 return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
1508 return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
1509 case CallingConv::ARM_AAPCS_VFP:
1510 return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
1511 case CallingConv::ARM_AAPCS:
1512 return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
1513 case CallingConv::ARM_APCS:
1514 return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
1518 bool ARMFastISel::ProcessCallArgs(SmallVectorImpl<Value*> &Args,
1519 SmallVectorImpl<unsigned> &ArgRegs,
1520 SmallVectorImpl<MVT> &ArgVTs,
1521 SmallVectorImpl<ISD::ArgFlagsTy> &ArgFlags,
1522 SmallVectorImpl<unsigned> &RegArgs,
1524 unsigned &NumBytes) {
1525 SmallVector<CCValAssign, 16> ArgLocs;
1526 CCState CCInfo(CC, false, TM, ArgLocs, *Context);
1527 CCInfo.AnalyzeCallOperands(ArgVTs, ArgFlags, CCAssignFnForCall(CC, false));
1529 // Get a count of how many bytes are to be pushed on the stack.
1530 NumBytes = CCInfo.getNextStackOffset();
1532 // Issue CALLSEQ_START
1533 unsigned AdjStackDown = TM.getRegisterInfo()->getCallFrameSetupOpcode();
1534 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1535 TII.get(AdjStackDown))
1538 // Process the args.
1539 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1540 CCValAssign &VA = ArgLocs[i];
1541 unsigned Arg = ArgRegs[VA.getValNo()];
1542 MVT ArgVT = ArgVTs[VA.getValNo()];
1544 // We don't handle NEON/vector parameters yet.
1545 if (ArgVT.isVector() || ArgVT.getSizeInBits() > 64)
1548 // Handle arg promotion, etc.
1549 switch (VA.getLocInfo()) {
1550 case CCValAssign::Full: break;
1551 case CCValAssign::SExt: {
1552 bool Emitted = FastEmitExtend(ISD::SIGN_EXTEND, VA.getLocVT(),
1554 assert(Emitted && "Failed to emit a sext!"); (void)Emitted;
1556 ArgVT = VA.getLocVT();
1559 case CCValAssign::ZExt: {
1560 bool Emitted = FastEmitExtend(ISD::ZERO_EXTEND, VA.getLocVT(),
1562 assert(Emitted && "Failed to emit a zext!"); (void)Emitted;
1564 ArgVT = VA.getLocVT();
1567 case CCValAssign::AExt: {
1568 bool Emitted = FastEmitExtend(ISD::ANY_EXTEND, VA.getLocVT(),
1571 Emitted = FastEmitExtend(ISD::ZERO_EXTEND, VA.getLocVT(),
1574 Emitted = FastEmitExtend(ISD::SIGN_EXTEND, VA.getLocVT(),
1577 assert(Emitted && "Failed to emit a aext!"); (void)Emitted;
1578 ArgVT = VA.getLocVT();
1581 case CCValAssign::BCvt: {
1582 unsigned BC = FastEmit_r(ArgVT, VA.getLocVT(), ISD::BITCAST, Arg,
1583 /*TODO: Kill=*/false);
1584 assert(BC != 0 && "Failed to emit a bitcast!");
1586 ArgVT = VA.getLocVT();
1589 default: llvm_unreachable("Unknown arg promotion!");
1592 // Now copy/store arg to correct locations.
1593 if (VA.isRegLoc() && !VA.needsCustom()) {
1594 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
1597 RegArgs.push_back(VA.getLocReg());
1598 } else if (VA.needsCustom()) {
1599 // TODO: We need custom lowering for vector (v2f64) args.
1600 if (VA.getLocVT() != MVT::f64) return false;
1602 CCValAssign &NextVA = ArgLocs[++i];
1604 // TODO: Only handle register args for now.
1605 if(!(VA.isRegLoc() && NextVA.isRegLoc())) return false;
1607 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1608 TII.get(ARM::VMOVRRD), VA.getLocReg())
1609 .addReg(NextVA.getLocReg(), RegState::Define)
1611 RegArgs.push_back(VA.getLocReg());
1612 RegArgs.push_back(NextVA.getLocReg());
1614 assert(VA.isMemLoc());
1615 // Need to store on the stack.
1617 Addr.BaseType = Address::RegBase;
1618 Addr.Base.Reg = ARM::SP;
1619 Addr.Offset = VA.getLocMemOffset();
1621 if (!ARMEmitStore(ArgVT, Arg, Addr)) return false;
1627 bool ARMFastISel::FinishCall(MVT RetVT, SmallVectorImpl<unsigned> &UsedRegs,
1628 const Instruction *I, CallingConv::ID CC,
1629 unsigned &NumBytes) {
1630 // Issue CALLSEQ_END
1631 unsigned AdjStackUp = TM.getRegisterInfo()->getCallFrameDestroyOpcode();
1632 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1633 TII.get(AdjStackUp))
1634 .addImm(NumBytes).addImm(0));
1636 // Now the return value.
1637 if (RetVT != MVT::isVoid) {
1638 SmallVector<CCValAssign, 16> RVLocs;
1639 CCState CCInfo(CC, false, TM, RVLocs, *Context);
1640 CCInfo.AnalyzeCallResult(RetVT, CCAssignFnForCall(CC, true));
1642 // Copy all of the result registers out of their specified physreg.
1643 if (RVLocs.size() == 2 && RetVT == MVT::f64) {
1644 // For this move we copy into two registers and then move into the
1645 // double fp reg we want.
1646 EVT DestVT = RVLocs[0].getValVT();
1647 TargetRegisterClass* DstRC = TLI.getRegClassFor(DestVT);
1648 unsigned ResultReg = createResultReg(DstRC);
1649 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1650 TII.get(ARM::VMOVDRR), ResultReg)
1651 .addReg(RVLocs[0].getLocReg())
1652 .addReg(RVLocs[1].getLocReg()));
1654 UsedRegs.push_back(RVLocs[0].getLocReg());
1655 UsedRegs.push_back(RVLocs[1].getLocReg());
1657 // Finally update the result.
1658 UpdateValueMap(I, ResultReg);
1660 assert(RVLocs.size() == 1 &&"Can't handle non-double multi-reg retvals!");
1661 EVT CopyVT = RVLocs[0].getValVT();
1662 TargetRegisterClass* DstRC = TLI.getRegClassFor(CopyVT);
1664 unsigned ResultReg = createResultReg(DstRC);
1665 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
1666 ResultReg).addReg(RVLocs[0].getLocReg());
1667 UsedRegs.push_back(RVLocs[0].getLocReg());
1669 // Finally update the result.
1670 UpdateValueMap(I, ResultReg);
1677 bool ARMFastISel::SelectRet(const Instruction *I) {
1678 const ReturnInst *Ret = cast<ReturnInst>(I);
1679 const Function &F = *I->getParent()->getParent();
1681 if (!FuncInfo.CanLowerReturn)
1687 CallingConv::ID CC = F.getCallingConv();
1688 if (Ret->getNumOperands() > 0) {
1689 SmallVector<ISD::OutputArg, 4> Outs;
1690 GetReturnInfo(F.getReturnType(), F.getAttributes().getRetAttributes(),
1693 // Analyze operands of the call, assigning locations to each operand.
1694 SmallVector<CCValAssign, 16> ValLocs;
1695 CCState CCInfo(CC, F.isVarArg(), TM, ValLocs, I->getContext());
1696 CCInfo.AnalyzeReturn(Outs, CCAssignFnForCall(CC, true /* is Ret */));
1698 const Value *RV = Ret->getOperand(0);
1699 unsigned Reg = getRegForValue(RV);
1703 // Only handle a single return value for now.
1704 if (ValLocs.size() != 1)
1707 CCValAssign &VA = ValLocs[0];
1709 // Don't bother handling odd stuff for now.
1710 if (VA.getLocInfo() != CCValAssign::Full)
1712 // Only handle register returns for now.
1715 // TODO: For now, don't try to handle cases where getLocInfo()
1716 // says Full but the types don't match.
1717 if (TLI.getValueType(RV->getType()) != VA.getValVT())
1721 unsigned SrcReg = Reg + VA.getValNo();
1722 unsigned DstReg = VA.getLocReg();
1723 const TargetRegisterClass* SrcRC = MRI.getRegClass(SrcReg);
1724 // Avoid a cross-class copy. This is very unlikely.
1725 if (!SrcRC->contains(DstReg))
1727 BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
1728 DstReg).addReg(SrcReg);
1730 // Mark the register as live out of the function.
1731 MRI.addLiveOut(VA.getLocReg());
1734 unsigned RetOpc = isThumb ? ARM::tBX_RET : ARM::BX_RET;
1735 AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1740 unsigned ARMFastISel::ARMSelectCallOp(const GlobalValue *GV) {
1742 // Darwin needs the r9 versions of the opcodes.
1743 bool isDarwin = Subtarget->isTargetDarwin();
1745 return isDarwin ? ARM::tBLr9 : ARM::tBL;
1747 return isDarwin ? ARM::BLr9 : ARM::BL;
1751 // A quick function that will emit a call for a named libcall in F with the
1752 // vector of passed arguments for the Instruction in I. We can assume that we
1753 // can emit a call for any libcall we can produce. This is an abridged version
1754 // of the full call infrastructure since we won't need to worry about things
1755 // like computed function pointers or strange arguments at call sites.
1756 // TODO: Try to unify this and the normal call bits for ARM, then try to unify
1758 bool ARMFastISel::ARMEmitLibcall(const Instruction *I, RTLIB::Libcall Call) {
1759 CallingConv::ID CC = TLI.getLibcallCallingConv(Call);
1761 // Handle *simple* calls for now.
1762 const Type *RetTy = I->getType();
1764 if (RetTy->isVoidTy())
1765 RetVT = MVT::isVoid;
1766 else if (!isTypeLegal(RetTy, RetVT))
1769 // TODO: For now if we have long calls specified we don't handle the call.
1770 if (EnableARMLongCalls) return false;
1772 // Set up the argument vectors.
1773 SmallVector<Value*, 8> Args;
1774 SmallVector<unsigned, 8> ArgRegs;
1775 SmallVector<MVT, 8> ArgVTs;
1776 SmallVector<ISD::ArgFlagsTy, 8> ArgFlags;
1777 Args.reserve(I->getNumOperands());
1778 ArgRegs.reserve(I->getNumOperands());
1779 ArgVTs.reserve(I->getNumOperands());
1780 ArgFlags.reserve(I->getNumOperands());
1781 for (unsigned i = 0; i < I->getNumOperands(); ++i) {
1782 Value *Op = I->getOperand(i);
1783 unsigned Arg = getRegForValue(Op);
1784 if (Arg == 0) return false;
1786 const Type *ArgTy = Op->getType();
1788 if (!isTypeLegal(ArgTy, ArgVT)) return false;
1790 ISD::ArgFlagsTy Flags;
1791 unsigned OriginalAlignment = TD.getABITypeAlignment(ArgTy);
1792 Flags.setOrigAlign(OriginalAlignment);
1795 ArgRegs.push_back(Arg);
1796 ArgVTs.push_back(ArgVT);
1797 ArgFlags.push_back(Flags);
1800 // Handle the arguments now that we've gotten them.
1801 SmallVector<unsigned, 4> RegArgs;
1803 if (!ProcessCallArgs(Args, ArgRegs, ArgVTs, ArgFlags, RegArgs, CC, NumBytes))
1806 // Issue the call, BLr9 for darwin, BL otherwise.
1807 // TODO: Turn this into the table of arm call ops.
1808 MachineInstrBuilder MIB;
1809 unsigned CallOpc = ARMSelectCallOp(NULL);
1811 // Explicitly adding the predicate here.
1812 MIB = AddDefaultPred(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1814 .addExternalSymbol(TLI.getLibcallName(Call));
1816 // Explicitly adding the predicate here.
1817 MIB = AddDefaultPred(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1819 .addExternalSymbol(TLI.getLibcallName(Call)));
1821 // Add implicit physical register uses to the call.
1822 for (unsigned i = 0, e = RegArgs.size(); i != e; ++i)
1823 MIB.addReg(RegArgs[i]);
1825 // Finish off the call including any return values.
1826 SmallVector<unsigned, 4> UsedRegs;
1827 if (!FinishCall(RetVT, UsedRegs, I, CC, NumBytes)) return false;
1829 // Set all unused physreg defs as dead.
1830 static_cast<MachineInstr *>(MIB)->setPhysRegsDeadExcept(UsedRegs, TRI);
1835 bool ARMFastISel::SelectCall(const Instruction *I) {
1836 const CallInst *CI = cast<CallInst>(I);
1837 const Value *Callee = CI->getCalledValue();
1839 // Can't handle inline asm or worry about intrinsics yet.
1840 if (isa<InlineAsm>(Callee) || isa<IntrinsicInst>(CI)) return false;
1842 // Only handle global variable Callees.
1843 const GlobalValue *GV = dyn_cast<GlobalValue>(Callee);
1847 // Check the calling convention.
1848 ImmutableCallSite CS(CI);
1849 CallingConv::ID CC = CS.getCallingConv();
1851 // TODO: Avoid some calling conventions?
1853 // Let SDISel handle vararg functions.
1854 const PointerType *PT = cast<PointerType>(CS.getCalledValue()->getType());
1855 const FunctionType *FTy = cast<FunctionType>(PT->getElementType());
1856 if (FTy->isVarArg())
1859 // Handle *simple* calls for now.
1860 const Type *RetTy = I->getType();
1862 if (RetTy->isVoidTy())
1863 RetVT = MVT::isVoid;
1864 else if (!isTypeLegal(RetTy, RetVT))
1867 // TODO: For now if we have long calls specified we don't handle the call.
1868 if (EnableARMLongCalls) return false;
1870 // Set up the argument vectors.
1871 SmallVector<Value*, 8> Args;
1872 SmallVector<unsigned, 8> ArgRegs;
1873 SmallVector<MVT, 8> ArgVTs;
1874 SmallVector<ISD::ArgFlagsTy, 8> ArgFlags;
1875 Args.reserve(CS.arg_size());
1876 ArgRegs.reserve(CS.arg_size());
1877 ArgVTs.reserve(CS.arg_size());
1878 ArgFlags.reserve(CS.arg_size());
1879 for (ImmutableCallSite::arg_iterator i = CS.arg_begin(), e = CS.arg_end();
1881 unsigned Arg = getRegForValue(*i);
1885 ISD::ArgFlagsTy Flags;
1886 unsigned AttrInd = i - CS.arg_begin() + 1;
1887 if (CS.paramHasAttr(AttrInd, Attribute::SExt))
1889 if (CS.paramHasAttr(AttrInd, Attribute::ZExt))
1892 // FIXME: Only handle *easy* calls for now.
1893 if (CS.paramHasAttr(AttrInd, Attribute::InReg) ||
1894 CS.paramHasAttr(AttrInd, Attribute::StructRet) ||
1895 CS.paramHasAttr(AttrInd, Attribute::Nest) ||
1896 CS.paramHasAttr(AttrInd, Attribute::ByVal))
1899 const Type *ArgTy = (*i)->getType();
1901 if (!isTypeLegal(ArgTy, ArgVT))
1903 unsigned OriginalAlignment = TD.getABITypeAlignment(ArgTy);
1904 Flags.setOrigAlign(OriginalAlignment);
1907 ArgRegs.push_back(Arg);
1908 ArgVTs.push_back(ArgVT);
1909 ArgFlags.push_back(Flags);
1912 // Handle the arguments now that we've gotten them.
1913 SmallVector<unsigned, 4> RegArgs;
1915 if (!ProcessCallArgs(Args, ArgRegs, ArgVTs, ArgFlags, RegArgs, CC, NumBytes))
1918 // Issue the call, BLr9 for darwin, BL otherwise.
1919 // TODO: Turn this into the table of arm call ops.
1920 MachineInstrBuilder MIB;
1921 unsigned CallOpc = ARMSelectCallOp(GV);
1922 // Explicitly adding the predicate here.
1924 // Explicitly adding the predicate here.
1925 MIB = AddDefaultPred(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1927 .addGlobalAddress(GV, 0, 0);
1929 // Explicitly adding the predicate here.
1930 MIB = AddDefaultPred(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
1932 .addGlobalAddress(GV, 0, 0));
1934 // Add implicit physical register uses to the call.
1935 for (unsigned i = 0, e = RegArgs.size(); i != e; ++i)
1936 MIB.addReg(RegArgs[i]);
1938 // Finish off the call including any return values.
1939 SmallVector<unsigned, 4> UsedRegs;
1940 if (!FinishCall(RetVT, UsedRegs, I, CC, NumBytes)) return false;
1942 // Set all unused physreg defs as dead.
1943 static_cast<MachineInstr *>(MIB)->setPhysRegsDeadExcept(UsedRegs, TRI);
1949 // TODO: SoftFP support.
1950 bool ARMFastISel::TargetSelectInstruction(const Instruction *I) {
1952 switch (I->getOpcode()) {
1953 case Instruction::Load:
1954 return SelectLoad(I);
1955 case Instruction::Store:
1956 return SelectStore(I);
1957 case Instruction::Br:
1958 return SelectBranch(I);
1959 case Instruction::ICmp:
1960 case Instruction::FCmp:
1961 return SelectCmp(I);
1962 case Instruction::FPExt:
1963 return SelectFPExt(I);
1964 case Instruction::FPTrunc:
1965 return SelectFPTrunc(I);
1966 case Instruction::SIToFP:
1967 return SelectSIToFP(I);
1968 case Instruction::FPToSI:
1969 return SelectFPToSI(I);
1970 case Instruction::FAdd:
1971 return SelectBinaryOp(I, ISD::FADD);
1972 case Instruction::FSub:
1973 return SelectBinaryOp(I, ISD::FSUB);
1974 case Instruction::FMul:
1975 return SelectBinaryOp(I, ISD::FMUL);
1976 case Instruction::SDiv:
1977 return SelectSDiv(I);
1978 case Instruction::SRem:
1979 return SelectSRem(I);
1980 case Instruction::Call:
1981 return SelectCall(I);
1982 case Instruction::Select:
1983 return SelectSelect(I);
1984 case Instruction::Ret:
1985 return SelectRet(I);
1992 llvm::FastISel *ARM::createFastISel(FunctionLoweringInfo &funcInfo) {
1993 // Completely untested on non-darwin.
1994 const TargetMachine &TM = funcInfo.MF->getTarget();
1996 // Darwin and thumb1 only for now.
1997 const ARMSubtarget *Subtarget = &TM.getSubtarget<ARMSubtarget>();
1998 if (Subtarget->isTargetDarwin() && !Subtarget->isThumb1Only() &&
1999 !DisableARMFastISel)
2000 return new ARMFastISel(funcInfo);