//
// "Fast" instruction selection is designed to emit very poor code quickly.
// Also, it is not designed to be able to do much lowering, so most illegal
-// types (e.g. i64 on 32-bit targets) and operations (e.g. calls) are not
-// supported. It is also not intended to be able to do much optimization,
-// except in a few cases where doing optimizations reduces overall compile
-// time (e.g. folding constants into immediate fields, because it's cheap
-// and it reduces the number of instructions later phases have to examine).
+// types (e.g. i64 on 32-bit targets) and operations are not supported. It is
+// also not intended to be able to do much optimization, except in a few cases
+// where doing optimizations reduces overall compile time. For example, folding
+// constants into immediate fields is often done, because it's cheap and it
+// reduces the number of instructions later phases have to examine.
//
// "Fast" instruction selection is able to fail gracefully and transfer
// control to the SelectionDAG selector for operations that it doesn't
-// support. In many cases, this allows us to avoid duplicating a lot of
+// support. In many cases, this allows us to avoid duplicating a lot of
// the complicated lowering logic that SelectionDAG currently has.
//
// The intended use for "fast" instruction selection is "-O0" mode
// compilation, where the quality of the generated code is irrelevant when
-// weighed against the speed at which the code can be generated. Also,
+// weighed against the speed at which the code can be generated. Also,
// at -O0, the LLVM optimizers are not running, and this makes the
// compile time of codegen a much higher portion of the overall compile
-// time. Despite its limitations, "fast" instruction selection is able to
+// time. Despite its limitations, "fast" instruction selection is able to
// handle enough code on its own to provide noticeable overall speedups
// in -O0 compiles.
//
// Basic operations are supported in a target-independent way, by reading
// the same instruction descriptions that the SelectionDAG selector reads,
// and identifying simple arithmetic operations that can be directly selected
-// from simple operators. More complicated operations currently require
+// from simple operators. More complicated operations currently require
// target-specific code.
//
//===----------------------------------------------------------------------===//
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
#include "llvm/CodeGen/FastISel.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
+#include "SelectionDAGBuilder.h"
+#include "FunctionLoweringInfo.h"
using namespace llvm;
unsigned FastISel::getRegForValue(Value *V) {
+ EVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true);
+ // Don't handle non-simple values in FastISel.
+ if (!RealVT.isSimple())
+ return 0;
+
+ // Ignore illegal types. We must do this before looking up the value
+ // in ValueMap because Arguments are given virtual registers regardless
+ // of whether FastISel can handle them.
+ MVT VT = RealVT.getSimpleVT();
+ if (!TLI.isTypeLegal(VT)) {
+ // Promote MVT::i1 to a legal type though, because it's common and easy.
+ if (VT == MVT::i1)
+ VT = TLI.getTypeToTransformTo(V->getContext(), VT).getSimpleVT();
+ else
+ return 0;
+ }
+
// Look up the value to see if we already have a register for it. We
// cache values defined by Instructions across blocks, and other values
// only locally. This is because Instructions already have the SSA
if (Reg != 0)
return Reg;
- MVT::SimpleValueType VT = TLI.getValueType(V->getType()).getSimpleVT();
-
- // Ignore illegal types.
- if (!TLI.isTypeLegal(VT)) {
- // Promote MVT::i1 to a legal type though, because it's common and easy.
- if (VT == MVT::i1)
- VT = TLI.getTypeToTransformTo(VT).getSimpleVT();
- else
- return 0;
- }
-
if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
if (CI->getValue().getActiveBits() <= 64)
Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
} else if (isa<ConstantPointerNull>(V)) {
// Translate this as an integer zero so that it can be
// local-CSE'd with actual integer zeros.
- Reg = getRegForValue(Constant::getNullValue(TD.getIntPtrType()));
+ Reg =
+ getRegForValue(Constant::getNullValue(TD.getIntPtrType(V->getContext())));
} else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF);
if (!Reg) {
const APFloat &Flt = CF->getValueAPF();
- MVT IntVT = TLI.getPointerTy();
+ EVT IntVT = TLI.getPointerTy();
uint64_t x[2];
uint32_t IntBitWidth = IntVT.getSizeInBits();
if (isExact) {
APInt IntVal(IntBitWidth, 2, x);
- unsigned IntegerReg = getRegForValue(ConstantInt::get(IntVal));
+ unsigned IntegerReg =
+ getRegForValue(ConstantInt::get(V->getContext(), IntVal));
if (IntegerReg != 0)
Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, IntegerReg);
}
Reg = LocalValueMap[CE];
} else if (isa<UndefValue>(V)) {
Reg = createResultReg(TLI.getRegClassFor(VT));
- BuildMI(MBB, TII.get(TargetInstrInfo::IMPLICIT_DEF), Reg);
+ BuildMI(MBB, DL, TII.get(TargetInstrInfo::IMPLICIT_DEF), Reg);
}
// If target-independent code couldn't handle the value, give target-specific
/// NOTE: This is only necessary because we might select a block that uses
/// a value before we select the block that defines the value. It might be
/// possible to fix this by selecting blocks in reverse postorder.
-void FastISel::UpdateValueMap(Value* I, unsigned Reg) {
+unsigned FastISel::UpdateValueMap(Value* I, unsigned Reg) {
if (!isa<Instruction>(I)) {
LocalValueMap[I] = Reg;
- return;
+ return Reg;
}
- if (!ValueMap.count(I))
- ValueMap[I] = Reg;
- else
- TII.copyRegToReg(*MBB, MBB->end(), ValueMap[I],
- Reg, MRI.getRegClass(Reg), MRI.getRegClass(Reg));
+
+ unsigned &AssignedReg = ValueMap[I];
+ if (AssignedReg == 0)
+ AssignedReg = Reg;
+ else if (Reg != AssignedReg) {
+ const TargetRegisterClass *RegClass = MRI.getRegClass(Reg);
+ TII.copyRegToReg(*MBB, MBB->end(), AssignedReg,
+ Reg, RegClass, RegClass);
+ }
+ return AssignedReg;
+}
+
+unsigned FastISel::getRegForGEPIndex(Value *Idx) {
+ unsigned IdxN = getRegForValue(Idx);
+ if (IdxN == 0)
+ // Unhandled operand. Halt "fast" selection and bail.
+ return 0;
+
+ // If the index is smaller or larger than intptr_t, truncate or extend it.
+ MVT PtrVT = TLI.getPointerTy();
+ EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false);
+ if (IdxVT.bitsLT(PtrVT))
+ IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::SIGN_EXTEND, IdxN);
+ else if (IdxVT.bitsGT(PtrVT))
+ IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::TRUNCATE, IdxN);
+ return IdxN;
}
/// SelectBinaryOp - Select and emit code for a binary operator instruction,
/// which has an opcode which directly corresponds to the given ISD opcode.
///
bool FastISel::SelectBinaryOp(User *I, ISD::NodeType ISDOpcode) {
- MVT VT = MVT::getMVT(I->getType(), /*HandleUnknown=*/true);
+ EVT VT = EVT::getEVT(I->getType(), /*HandleUnknown=*/true);
if (VT == MVT::Other || !VT.isSimple())
// Unhandled type. Halt "fast" selection and bail.
return false;
if (VT == MVT::i1 &&
(ISDOpcode == ISD::AND || ISDOpcode == ISD::OR ||
ISDOpcode == ISD::XOR))
- VT = TLI.getTypeToTransformTo(VT);
+ VT = TLI.getTypeToTransformTo(I->getContext(), VT);
else
return false;
}
return false;
const Type *Ty = I->getOperand(0)->getType();
- MVT::SimpleValueType VT = TLI.getPointerTy().getSimpleVT();
+ MVT VT = TLI.getPointerTy();
for (GetElementPtrInst::op_iterator OI = I->op_begin()+1, E = I->op_end();
OI != E; ++OI) {
Value *Idx = *OI;
if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) {
if (CI->getZExtValue() == 0) continue;
uint64_t Offs =
- TD.getABITypeSize(Ty)*cast<ConstantInt>(CI)->getSExtValue();
+ TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue();
N = FastEmit_ri_(VT, ISD::ADD, N, Offs, VT);
if (N == 0)
// Unhandled operand. Halt "fast" selection and bail.
}
// N = N + Idx * ElementSize;
- uint64_t ElementSize = TD.getABITypeSize(Ty);
- unsigned IdxN = getRegForValue(Idx);
- if (IdxN == 0)
- // Unhandled operand. Halt "fast" selection and bail.
- return false;
-
- // If the index is smaller or larger than intptr_t, truncate or extend
- // it.
- MVT IdxVT = MVT::getMVT(Idx->getType(), /*HandleUnknown=*/false);
- if (IdxVT.bitsLT(VT))
- IdxN = FastEmit_r(IdxVT.getSimpleVT(), VT, ISD::SIGN_EXTEND, IdxN);
- else if (IdxVT.bitsGT(VT))
- IdxN = FastEmit_r(IdxVT.getSimpleVT(), VT, ISD::TRUNCATE, IdxN);
+ uint64_t ElementSize = TD.getTypeAllocSize(Ty);
+ unsigned IdxN = getRegForGEPIndex(Idx);
if (IdxN == 0)
// Unhandled operand. Halt "fast" selection and bail.
return false;
unsigned IID = F->getIntrinsicID();
switch (IID) {
default: break;
- case Intrinsic::dbg_stoppoint: {
- DbgStopPointInst *SPI = cast<DbgStopPointInst>(I);
- if (MMI && SPI->getContext() && MMI->Verify(SPI->getContext())) {
- DebugInfoDesc *DD = MMI->getDescFor(SPI->getContext());
- assert(DD && "Not a debug information descriptor");
- const CompileUnitDesc *CompileUnit = cast<CompileUnitDesc>(DD);
- unsigned SrcFile = MMI->RecordSource(CompileUnit);
- unsigned Line = SPI->getLine();
- unsigned Col = SPI->getColumn();
- unsigned ID = MMI->RecordSourceLine(Line, Col, SrcFile);
- const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
- BuildMI(MBB, II).addImm(ID);
- }
+ case Intrinsic::dbg_stoppoint:
+ case Intrinsic::dbg_region_start:
+ case Intrinsic::dbg_region_end:
+ case Intrinsic::dbg_func_start:
+ // FIXME - Remove this instructions once the dust settles.
return true;
- }
- case Intrinsic::dbg_region_start: {
- DbgRegionStartInst *RSI = cast<DbgRegionStartInst>(I);
- if (MMI && RSI->getContext() && MMI->Verify(RSI->getContext())) {
- unsigned ID = MMI->RecordRegionStart(RSI->getContext());
- const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
- BuildMI(MBB, II).addImm(ID);
+ case Intrinsic::dbg_declare: {
+ DbgDeclareInst *DI = cast<DbgDeclareInst>(I);
+ if (!isValidDebugInfoIntrinsic(*DI, CodeGenOpt::None) || !DW
+ || !DW->ShouldEmitDwarfDebug())
+ return true;
+
+ Value *Address = DI->getAddress();
+ if (BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
+ Address = BCI->getOperand(0);
+ AllocaInst *AI = dyn_cast<AllocaInst>(Address);
+ // Don't handle byval struct arguments or VLAs, for example.
+ if (!AI) break;
+ DenseMap<const AllocaInst*, int>::iterator SI =
+ StaticAllocaMap.find(AI);
+ if (SI == StaticAllocaMap.end()) break; // VLAs.
+ int FI = SI->second;
+ if (MMI) {
+ MetadataContext &TheMetadata =
+ DI->getParent()->getContext().getMetadata();
+ unsigned MDDbgKind = TheMetadata.getMDKind("dbg");
+ MDNode *Dbg = TheMetadata.getMD(MDDbgKind, DI);
+ MMI->setVariableDbgInfo(DI->getVariable(), FI, Dbg);
}
return true;
}
- case Intrinsic::dbg_region_end: {
- DbgRegionEndInst *REI = cast<DbgRegionEndInst>(I);
- if (MMI && REI->getContext() && MMI->Verify(REI->getContext())) {
- unsigned ID = MMI->RecordRegionEnd(REI->getContext());
- const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
- BuildMI(MBB, II).addImm(ID);
+ case Intrinsic::eh_exception: {
+ EVT VT = TLI.getValueType(I->getType());
+ switch (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)) {
+ default: break;
+ case TargetLowering::Expand: {
+ assert(MBB->isLandingPad() && "Call to eh.exception not in landing pad!");
+ unsigned Reg = TLI.getExceptionAddressRegister();
+ const TargetRegisterClass *RC = TLI.getRegClassFor(VT);
+ unsigned ResultReg = createResultReg(RC);
+ bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
+ Reg, RC, RC);
+ assert(InsertedCopy && "Can't copy address registers!");
+ InsertedCopy = InsertedCopy;
+ UpdateValueMap(I, ResultReg);
+ return true;
}
- return true;
- }
- case Intrinsic::dbg_func_start: {
- if (!MMI) return true;
- DbgFuncStartInst *FSI = cast<DbgFuncStartInst>(I);
- Value *SP = FSI->getSubprogram();
- if (SP && MMI->Verify(SP)) {
- // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is
- // what (most?) gdb expects.
- DebugInfoDesc *DD = MMI->getDescFor(SP);
- assert(DD && "Not a debug information descriptor");
- SubprogramDesc *Subprogram = cast<SubprogramDesc>(DD);
- const CompileUnitDesc *CompileUnit = Subprogram->getFile();
- unsigned SrcFile = MMI->RecordSource(CompileUnit);
- // Record the source line but does create a label. It will be emitted
- // at asm emission time.
- MMI->RecordSourceLine(Subprogram->getLine(), 0, SrcFile);
}
- return true;
+ break;
}
- case Intrinsic::dbg_declare: {
- DbgDeclareInst *DI = cast<DbgDeclareInst>(I);
- Value *Variable = DI->getVariable();
- if (MMI && Variable && MMI->Verify(Variable)) {
- // Determine the address of the declared object.
- Value *Address = DI->getAddress();
- if (BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
- Address = BCI->getOperand(0);
- AllocaInst *AI = dyn_cast<AllocaInst>(Address);
- // Don't handle byval struct arguments, for example.
- if (!AI) break;
- DenseMap<const AllocaInst*, int>::iterator SI =
- StaticAllocaMap.find(AI);
- assert(SI != StaticAllocaMap.end() && "Invalid dbg.declare!");
- int FI = SI->second;
-
- // Determine the debug globalvariable.
- GlobalValue *GV = cast<GlobalVariable>(Variable);
-
- // Build the DECLARE instruction.
- const TargetInstrDesc &II = TII.get(TargetInstrInfo::DECLARE);
- BuildMI(MBB, II).addFrameIndex(FI).addGlobalAddress(GV);
+ case Intrinsic::eh_selector: {
+ EVT VT = TLI.getValueType(I->getType());
+ switch (TLI.getOperationAction(ISD::EHSELECTION, VT)) {
+ default: break;
+ case TargetLowering::Expand: {
+ if (MMI) {
+ if (MBB->isLandingPad())
+ AddCatchInfo(*cast<CallInst>(I), MMI, MBB);
+ else {
+#ifndef NDEBUG
+ CatchInfoLost.insert(cast<CallInst>(I));
+#endif
+ // FIXME: Mark exception selector register as live in. Hack for PR1508.
+ unsigned Reg = TLI.getExceptionSelectorRegister();
+ if (Reg) MBB->addLiveIn(Reg);
+ }
+
+ unsigned Reg = TLI.getExceptionSelectorRegister();
+ EVT SrcVT = TLI.getPointerTy();
+ const TargetRegisterClass *RC = TLI.getRegClassFor(SrcVT);
+ unsigned ResultReg = createResultReg(RC);
+ bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg, Reg,
+ RC, RC);
+ assert(InsertedCopy && "Can't copy address registers!");
+ InsertedCopy = InsertedCopy;
+
+ // Cast the register to the type of the selector.
+ if (SrcVT.bitsGT(MVT::i32))
+ ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, ISD::TRUNCATE,
+ ResultReg);
+ else if (SrcVT.bitsLT(MVT::i32))
+ ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32,
+ ISD::SIGN_EXTEND, ResultReg);
+ if (ResultReg == 0)
+ // Unhandled operand. Halt "fast" selection and bail.
+ return false;
+
+ UpdateValueMap(I, ResultReg);
+ } else {
+ unsigned ResultReg =
+ getRegForValue(Constant::getNullValue(I->getType()));
+ UpdateValueMap(I, ResultReg);
+ }
+ return true;
}
- return true;
+ }
+ break;
}
}
return false;
}
bool FastISel::SelectCast(User *I, ISD::NodeType Opcode) {
- MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
- MVT DstVT = TLI.getValueType(I->getType());
+ EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
+ EVT DstVT = TLI.getValueType(I->getType());
if (SrcVT == MVT::Other || !SrcVT.isSimple() ||
- DstVT == MVT::Other || !DstVT.isSimple() ||
- !TLI.isTypeLegal(DstVT))
+ DstVT == MVT::Other || !DstVT.isSimple())
// Unhandled type. Halt "fast" selection and bail.
return false;
+ // Check if the destination type is legal. Or as a special case,
+ // it may be i1 if we're doing a truncate because that's
+ // easy and somewhat common.
+ if (!TLI.isTypeLegal(DstVT))
+ if (DstVT != MVT::i1 || Opcode != ISD::TRUNCATE)
+ // Unhandled type. Halt "fast" selection and bail.
+ return false;
+
// Check if the source operand is legal. Or as a special case,
// it may be i1 if we're doing zero-extension because that's
- // trivially easy and somewhat common.
- if (!TLI.isTypeLegal(SrcVT)) {
- if (SrcVT == MVT::i1 && Opcode == ISD::ZERO_EXTEND)
- SrcVT = TLI.getTypeToTransformTo(SrcVT);
- else
+ // easy and somewhat common.
+ if (!TLI.isTypeLegal(SrcVT))
+ if (SrcVT != MVT::i1 || Opcode != ISD::ZERO_EXTEND)
// Unhandled type. Halt "fast" selection and bail.
return false;
- }
-
+
unsigned InputReg = getRegForValue(I->getOperand(0));
if (!InputReg)
// Unhandled operand. Halt "fast" selection and bail.
return false;
-
+
+ // If the operand is i1, arrange for the high bits in the register to be zero.
+ if (SrcVT == MVT::i1) {
+ SrcVT = TLI.getTypeToTransformTo(I->getContext(), SrcVT);
+ InputReg = FastEmitZExtFromI1(SrcVT.getSimpleVT(), InputReg);
+ if (!InputReg)
+ return false;
+ }
+ // If the result is i1, truncate to the target's type for i1 first.
+ if (DstVT == MVT::i1)
+ DstVT = TLI.getTypeToTransformTo(I->getContext(), DstVT);
+
unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(),
DstVT.getSimpleVT(),
Opcode,
}
// Bitcasts of other values become reg-reg copies or BIT_CONVERT operators.
- MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
- MVT DstVT = TLI.getValueType(I->getType());
+ EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
+ EVT DstVT = TLI.getValueType(I->getType());
if (SrcVT == MVT::Other || !SrcVT.isSimple() ||
DstVT == MVT::Other || !DstVT.isSimple() ||
void
FastISel::FastEmitBranch(MachineBasicBlock *MSucc) {
MachineFunction::iterator NextMBB =
- next(MachineFunction::iterator(MBB));
+ llvm::next(MachineFunction::iterator(MBB));
if (MBB->isLayoutSuccessor(MSucc)) {
// The unconditional fall-through case, which needs no instructions.
MBB->addSuccessor(MSucc);
}
+/// SelectFNeg - Emit an FNeg operation.
+///
+bool
+FastISel::SelectFNeg(User *I) {
+ unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I));
+ if (OpReg == 0) return false;
+
+ // If the target has ISD::FNEG, use it.
+ EVT VT = TLI.getValueType(I->getType());
+ unsigned ResultReg = FastEmit_r(VT.getSimpleVT(), VT.getSimpleVT(),
+ ISD::FNEG, OpReg);
+ if (ResultReg != 0) {
+ UpdateValueMap(I, ResultReg);
+ return true;
+ }
+
+ // Bitcast the value to integer, twiddle the sign bit with xor,
+ // and then bitcast it back to floating-point.
+ if (VT.getSizeInBits() > 64) return false;
+ EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits());
+ if (!TLI.isTypeLegal(IntVT))
+ return false;
+
+ unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(),
+ ISD::BIT_CONVERT, OpReg);
+ if (IntReg == 0)
+ return false;
+
+ unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, IntReg,
+ UINT64_C(1) << (VT.getSizeInBits()-1),
+ IntVT.getSimpleVT());
+ if (IntResultReg == 0)
+ return false;
+
+ ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(),
+ ISD::BIT_CONVERT, IntResultReg);
+ if (ResultReg == 0)
+ return false;
+
+ UpdateValueMap(I, ResultReg);
+ return true;
+}
+
bool
FastISel::SelectOperator(User *I, unsigned Opcode) {
switch (Opcode) {
- case Instruction::Add: {
- ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FADD : ISD::ADD;
- return SelectBinaryOp(I, Opc);
- }
- case Instruction::Sub: {
- ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FSUB : ISD::SUB;
- return SelectBinaryOp(I, Opc);
- }
- case Instruction::Mul: {
- ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FMUL : ISD::MUL;
- return SelectBinaryOp(I, Opc);
- }
+ case Instruction::Add:
+ return SelectBinaryOp(I, ISD::ADD);
+ case Instruction::FAdd:
+ return SelectBinaryOp(I, ISD::FADD);
+ case Instruction::Sub:
+ return SelectBinaryOp(I, ISD::SUB);
+ case Instruction::FSub:
+ // FNeg is currently represented in LLVM IR as a special case of FSub.
+ if (BinaryOperator::isFNeg(I))
+ return SelectFNeg(I);
+ return SelectBinaryOp(I, ISD::FSUB);
+ case Instruction::Mul:
+ return SelectBinaryOp(I, ISD::MUL);
+ case Instruction::FMul:
+ return SelectBinaryOp(I, ISD::FMUL);
case Instruction::SDiv:
return SelectBinaryOp(I, ISD::SDIV);
case Instruction::UDiv:
case Instruction::IntToPtr: // Deliberate fall-through.
case Instruction::PtrToInt: {
- MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
- MVT DstVT = TLI.getValueType(I->getType());
+ EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
+ EVT DstVT = TLI.getValueType(I->getType());
if (DstVT.bitsGT(SrcVT))
return SelectCast(I, ISD::ZERO_EXTEND);
if (DstVT.bitsLT(SrcVT))
FastISel::FastISel(MachineFunction &mf,
MachineModuleInfo *mmi,
+ DwarfWriter *dw,
DenseMap<const Value *, unsigned> &vm,
DenseMap<const BasicBlock *, MachineBasicBlock *> &bm,
- DenseMap<const AllocaInst *, int> &am)
+ DenseMap<const AllocaInst *, int> &am
+#ifndef NDEBUG
+ , SmallSet<Instruction*, 8> &cil
+#endif
+ )
: MBB(0),
ValueMap(vm),
MBBMap(bm),
StaticAllocaMap(am),
+#ifndef NDEBUG
+ CatchInfoLost(cil),
+#endif
MF(mf),
MMI(mmi),
+ DW(dw),
MRI(MF.getRegInfo()),
MFI(*MF.getFrameInfo()),
MCP(*MF.getConstantPool()),
FastISel::~FastISel() {}
-unsigned FastISel::FastEmit_(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_(MVT, MVT,
ISD::NodeType) {
return 0;
}
-unsigned FastISel::FastEmit_r(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_r(MVT, MVT,
ISD::NodeType, unsigned /*Op0*/) {
return 0;
}
-unsigned FastISel::FastEmit_rr(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_rr(MVT, MVT,
ISD::NodeType, unsigned /*Op0*/,
unsigned /*Op0*/) {
return 0;
}
-unsigned FastISel::FastEmit_i(MVT::SimpleValueType, MVT::SimpleValueType,
- ISD::NodeType, uint64_t /*Imm*/) {
+unsigned FastISel::FastEmit_i(MVT, MVT, ISD::NodeType, uint64_t /*Imm*/) {
return 0;
}
-unsigned FastISel::FastEmit_f(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_f(MVT, MVT,
ISD::NodeType, ConstantFP * /*FPImm*/) {
return 0;
}
-unsigned FastISel::FastEmit_ri(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_ri(MVT, MVT,
ISD::NodeType, unsigned /*Op0*/,
uint64_t /*Imm*/) {
return 0;
}
-unsigned FastISel::FastEmit_rf(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_rf(MVT, MVT,
ISD::NodeType, unsigned /*Op0*/,
ConstantFP * /*FPImm*/) {
return 0;
}
-unsigned FastISel::FastEmit_rri(MVT::SimpleValueType, MVT::SimpleValueType,
+unsigned FastISel::FastEmit_rri(MVT, MVT,
ISD::NodeType,
unsigned /*Op0*/, unsigned /*Op1*/,
uint64_t /*Imm*/) {
/// to emit an instruction with an immediate operand using FastEmit_ri.
/// If that fails, it materializes the immediate into a register and try
/// FastEmit_rr instead.
-unsigned FastISel::FastEmit_ri_(MVT::SimpleValueType VT, ISD::NodeType Opcode,
+unsigned FastISel::FastEmit_ri_(MVT VT, ISD::NodeType Opcode,
unsigned Op0, uint64_t Imm,
- MVT::SimpleValueType ImmType) {
+ MVT ImmType) {
// First check if immediate type is legal. If not, we can't use the ri form.
unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Imm);
if (ResultReg != 0)
/// to emit an instruction with a floating-point immediate operand using
/// FastEmit_rf. If that fails, it materializes the immediate into a register
/// and try FastEmit_rr instead.
-unsigned FastISel::FastEmit_rf_(MVT::SimpleValueType VT, ISD::NodeType Opcode,
+unsigned FastISel::FastEmit_rf_(MVT VT, ISD::NodeType Opcode,
unsigned Op0, ConstantFP *FPImm,
- MVT::SimpleValueType ImmType) {
+ MVT ImmType) {
// First check if immediate type is legal. If not, we can't use the rf form.
unsigned ResultReg = FastEmit_rf(VT, VT, Opcode, Op0, FPImm);
if (ResultReg != 0)
// be replaced by code that creates a load from a constant-pool entry,
// which will require some target-specific work.
const APFloat &Flt = FPImm->getValueAPF();
- MVT IntVT = TLI.getPointerTy();
+ EVT IntVT = TLI.getPointerTy();
uint64_t x[2];
uint32_t IntBitWidth = IntVT.getSizeInBits();
unsigned ResultReg = createResultReg(RC);
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
- BuildMI(MBB, II, ResultReg);
+ BuildMI(MBB, DL, II, ResultReg);
return ResultReg;
}
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0);
else {
- BuildMI(MBB, II).addReg(Op0);
+ BuildMI(MBB, DL, II).addReg(Op0);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0).addReg(Op1);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0).addReg(Op1);
else {
- BuildMI(MBB, II).addReg(Op0).addReg(Op1);
+ BuildMI(MBB, DL, II).addReg(Op0).addReg(Op1);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0).addImm(Imm);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0).addImm(Imm);
else {
- BuildMI(MBB, II).addReg(Op0).addImm(Imm);
+ BuildMI(MBB, DL, II).addReg(Op0).addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0).addFPImm(FPImm);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0).addFPImm(FPImm);
else {
- BuildMI(MBB, II).addReg(Op0).addFPImm(FPImm);
+ BuildMI(MBB, DL, II).addReg(Op0).addFPImm(FPImm);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0).addReg(Op1).addImm(Imm);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0).addReg(Op1).addImm(Imm);
else {
- BuildMI(MBB, II).addReg(Op0).addReg(Op1).addImm(Imm);
+ BuildMI(MBB, DL, II).addReg(Op0).addReg(Op1).addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
const TargetInstrDesc &II = TII.get(MachineInstOpcode);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addImm(Imm);
+ BuildMI(MBB, DL, II, ResultReg).addImm(Imm);
else {
- BuildMI(MBB, II).addImm(Imm);
+ BuildMI(MBB, DL, II).addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
return ResultReg;
}
-unsigned FastISel::FastEmitInst_extractsubreg(unsigned Op0, uint32_t Idx) {
+unsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT,
+ unsigned Op0, uint32_t Idx) {
const TargetRegisterClass* RC = MRI.getRegClass(Op0);
- const TargetRegisterClass* SRC = *(RC->subregclasses_begin()+Idx-1);
- unsigned ResultReg = createResultReg(SRC);
+ unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT));
const TargetInstrDesc &II = TII.get(TargetInstrInfo::EXTRACT_SUBREG);
if (II.getNumDefs() >= 1)
- BuildMI(MBB, II, ResultReg).addReg(Op0).addImm(Idx);
+ BuildMI(MBB, DL, II, ResultReg).addReg(Op0).addImm(Idx);
else {
- BuildMI(MBB, II).addReg(Op0).addImm(Idx);
+ BuildMI(MBB, DL, II).addReg(Op0).addImm(Idx);
bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
II.ImplicitDefs[0], RC, RC);
if (!InsertedCopy)
}
return ResultReg;
}
+
+/// FastEmitZExtFromI1 - Emit MachineInstrs to compute the value of Op
+/// with all but the least significant bit set to zero.
+unsigned FastISel::FastEmitZExtFromI1(MVT VT, unsigned Op) {
+ return FastEmit_ri(VT, VT, ISD::AND, Op, 1);
+}
projects / oota-llvm.git / blobdiff