IntrinsicLowering.cpp [plain text]
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Instructions.h"
#include "llvm/Type.h"
#include "llvm/CodeGen/IntrinsicLowering.h"
#include "llvm/Support/Streams.h"
#include "llvm/Target/TargetData.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/STLExtras.h"
using namespace llvm;
template <class ArgIt>
static void EnsureFunctionExists(Module &M, const char *Name,
ArgIt ArgBegin, ArgIt ArgEnd,
const Type *RetTy) {
std::vector<const Type *> ParamTys;
for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
ParamTys.push_back(I->getType());
M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false));
}
static void EnsureFPIntrinsicsExist(Module &M, Function *Fn,
const char *FName,
const char *DName, const char *LDName) {
switch((int)Fn->arg_begin()->getType()->getTypeID()) {
case Type::FloatTyID:
EnsureFunctionExists(M, FName, Fn->arg_begin(), Fn->arg_end(),
Type::FloatTy);
break;
case Type::DoubleTyID:
EnsureFunctionExists(M, DName, Fn->arg_begin(), Fn->arg_end(),
Type::DoubleTy);
break;
case Type::X86_FP80TyID:
case Type::FP128TyID:
case Type::PPC_FP128TyID:
EnsureFunctionExists(M, LDName, Fn->arg_begin(), Fn->arg_end(),
Fn->arg_begin()->getType());
break;
}
}
template <class ArgIt>
static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
ArgIt ArgBegin, ArgIt ArgEnd,
const Type *RetTy, Constant *&FCache) {
if (!FCache) {
Module *M = CI->getParent()->getParent()->getParent();
std::vector<const Type *> ParamTys;
for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
ParamTys.push_back((*I)->getType());
FCache = M->getOrInsertFunction(NewFn,
FunctionType::get(RetTy, ParamTys, false));
}
SmallVector<Value *, 8> Args(ArgBegin, ArgEnd);
CallInst *NewCI = CallInst::Create(FCache, Args.begin(), Args.end(),
CI->getName(), CI);
if (!CI->use_empty())
CI->replaceAllUsesWith(NewCI);
return NewCI;
}
void IntrinsicLowering::AddPrototypes(Module &M) {
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->isDeclaration() && !I->use_empty())
switch (I->getIntrinsicID()) {
default: break;
case Intrinsic::setjmp:
EnsureFunctionExists(M, "setjmp", I->arg_begin(), I->arg_end(),
Type::Int32Ty);
break;
case Intrinsic::longjmp:
EnsureFunctionExists(M, "longjmp", I->arg_begin(), I->arg_end(),
Type::VoidTy);
break;
case Intrinsic::siglongjmp:
EnsureFunctionExists(M, "abort", I->arg_end(), I->arg_end(),
Type::VoidTy);
break;
case Intrinsic::memcpy:
M.getOrInsertFunction("memcpy", PointerType::getUnqual(Type::Int8Ty),
PointerType::getUnqual(Type::Int8Ty),
PointerType::getUnqual(Type::Int8Ty),
TD.getIntPtrType(), (Type *)0);
break;
case Intrinsic::memmove:
M.getOrInsertFunction("memmove", PointerType::getUnqual(Type::Int8Ty),
PointerType::getUnqual(Type::Int8Ty),
PointerType::getUnqual(Type::Int8Ty),
TD.getIntPtrType(), (Type *)0);
break;
case Intrinsic::memset:
M.getOrInsertFunction("memset", PointerType::getUnqual(Type::Int8Ty),
PointerType::getUnqual(Type::Int8Ty),
Type::Int32Ty,
TD.getIntPtrType(), (Type *)0);
break;
case Intrinsic::sqrt:
EnsureFPIntrinsicsExist(M, I, "sqrtf", "sqrt", "sqrtl");
break;
case Intrinsic::sin:
EnsureFPIntrinsicsExist(M, I, "sinf", "sin", "sinl");
break;
case Intrinsic::cos:
EnsureFPIntrinsicsExist(M, I, "cosf", "cos", "cosl");
break;
case Intrinsic::pow:
EnsureFPIntrinsicsExist(M, I, "powf", "pow", "powl");
break;
case Intrinsic::log:
EnsureFPIntrinsicsExist(M, I, "logf", "log", "logl");
break;
case Intrinsic::log2:
EnsureFPIntrinsicsExist(M, I, "log2f", "log2", "log2l");
break;
case Intrinsic::log10:
EnsureFPIntrinsicsExist(M, I, "log10f", "log10", "log10l");
break;
case Intrinsic::exp:
EnsureFPIntrinsicsExist(M, I, "expf", "exp", "expl");
break;
case Intrinsic::exp2:
EnsureFPIntrinsicsExist(M, I, "exp2f", "exp2", "exp2l");
break;
}
}
static Value *LowerBSWAP(Value *V, Instruction *IP) {
assert(V->getType()->isInteger() && "Can't bswap a non-integer type!");
unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
switch(BitSize) {
default: assert(0 && "Unhandled type size of value to byteswap!");
case 16: {
Value *Tmp1 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),8),"bswap.2",IP);
Value *Tmp2 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),8),"bswap.1",IP);
V = BinaryOperator::CreateOr(Tmp1, Tmp2, "bswap.i16", IP);
break;
}
case 32: {
Value *Tmp4 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),24),"bswap.4", IP);
Value *Tmp3 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),8),"bswap.3",IP);
Value *Tmp2 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),8),"bswap.2",IP);
Value *Tmp1 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),24),"bswap.1", IP);
Tmp3 = BinaryOperator::CreateAnd(Tmp3,
ConstantInt::get(Type::Int32Ty, 0xFF0000),
"bswap.and3", IP);
Tmp2 = BinaryOperator::CreateAnd(Tmp2,
ConstantInt::get(Type::Int32Ty, 0xFF00),
"bswap.and2", IP);
Tmp4 = BinaryOperator::CreateOr(Tmp4, Tmp3, "bswap.or1", IP);
Tmp2 = BinaryOperator::CreateOr(Tmp2, Tmp1, "bswap.or2", IP);
V = BinaryOperator::CreateOr(Tmp4, Tmp2, "bswap.i32", IP);
break;
}
case 64: {
Value *Tmp8 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),56),"bswap.8", IP);
Value *Tmp7 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),40),"bswap.7", IP);
Value *Tmp6 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),24),"bswap.6", IP);
Value *Tmp5 = BinaryOperator::CreateShl(V,
ConstantInt::get(V->getType(),8),"bswap.5", IP);
Value* Tmp4 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),8),"bswap.4", IP);
Value* Tmp3 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),24),"bswap.3", IP);
Value* Tmp2 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),40),"bswap.2", IP);
Value* Tmp1 = BinaryOperator::CreateLShr(V,
ConstantInt::get(V->getType(),56),"bswap.1", IP);
Tmp7 = BinaryOperator::CreateAnd(Tmp7,
ConstantInt::get(Type::Int64Ty,
0xFF000000000000ULL),
"bswap.and7", IP);
Tmp6 = BinaryOperator::CreateAnd(Tmp6,
ConstantInt::get(Type::Int64Ty, 0xFF0000000000ULL),
"bswap.and6", IP);
Tmp5 = BinaryOperator::CreateAnd(Tmp5,
ConstantInt::get(Type::Int64Ty, 0xFF00000000ULL),
"bswap.and5", IP);
Tmp4 = BinaryOperator::CreateAnd(Tmp4,
ConstantInt::get(Type::Int64Ty, 0xFF000000ULL),
"bswap.and4", IP);
Tmp3 = BinaryOperator::CreateAnd(Tmp3,
ConstantInt::get(Type::Int64Ty, 0xFF0000ULL),
"bswap.and3", IP);
Tmp2 = BinaryOperator::CreateAnd(Tmp2,
ConstantInt::get(Type::Int64Ty, 0xFF00ULL),
"bswap.and2", IP);
Tmp8 = BinaryOperator::CreateOr(Tmp8, Tmp7, "bswap.or1", IP);
Tmp6 = BinaryOperator::CreateOr(Tmp6, Tmp5, "bswap.or2", IP);
Tmp4 = BinaryOperator::CreateOr(Tmp4, Tmp3, "bswap.or3", IP);
Tmp2 = BinaryOperator::CreateOr(Tmp2, Tmp1, "bswap.or4", IP);
Tmp8 = BinaryOperator::CreateOr(Tmp8, Tmp6, "bswap.or5", IP);
Tmp4 = BinaryOperator::CreateOr(Tmp4, Tmp2, "bswap.or6", IP);
V = BinaryOperator::CreateOr(Tmp8, Tmp4, "bswap.i64", IP);
break;
}
}
return V;
}
static Value *LowerCTPOP(Value *V, Instruction *IP) {
assert(V->getType()->isInteger() && "Can't ctpop a non-integer type!");
static const uint64_t MaskValues[6] = {
0x5555555555555555ULL, 0x3333333333333333ULL,
0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
};
unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
unsigned WordSize = (BitSize + 63) / 64;
Value *Count = ConstantInt::get(V->getType(), 0);
for (unsigned n = 0; n < WordSize; ++n) {
Value *PartValue = V;
for (unsigned i = 1, ct = 0; i < (BitSize>64 ? 64 : BitSize);
i <<= 1, ++ct) {
Value *MaskCst = ConstantInt::get(V->getType(), MaskValues[ct]);
Value *LHS = BinaryOperator::CreateAnd(
PartValue, MaskCst, "cppop.and1", IP);
Value *VShift = BinaryOperator::CreateLShr(PartValue,
ConstantInt::get(V->getType(), i), "ctpop.sh", IP);
Value *RHS = BinaryOperator::CreateAnd(VShift, MaskCst, "cppop.and2", IP);
PartValue = BinaryOperator::CreateAdd(LHS, RHS, "ctpop.step", IP);
}
Count = BinaryOperator::CreateAdd(PartValue, Count, "ctpop.part", IP);
if (BitSize > 64) {
V = BinaryOperator::CreateLShr(V, ConstantInt::get(V->getType(), 64),
"ctpop.part.sh", IP);
BitSize -= 64;
}
}
return Count;
}
static Value *LowerCTLZ(Value *V, Instruction *IP) {
unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
for (unsigned i = 1; i < BitSize; i <<= 1) {
Value *ShVal = ConstantInt::get(V->getType(), i);
ShVal = BinaryOperator::CreateLShr(V, ShVal, "ctlz.sh", IP);
V = BinaryOperator::CreateOr(V, ShVal, "ctlz.step", IP);
}
V = BinaryOperator::CreateNot(V, "", IP);
return LowerCTPOP(V, IP);
}
static Instruction *LowerPartSelect(CallInst *CI) {
Function *F = CI->getCalledFunction();
const FunctionType *FT = F->getFunctionType();
if (!F->isDeclaration() || !FT->getReturnType()->isInteger() ||
FT->getNumParams() != 3 || !FT->getParamType(0)->isInteger() ||
!FT->getParamType(1)->isInteger() || !FT->getParamType(2)->isInteger())
return CI;
std::string Name(F->getName());
for (unsigned i = 4; i < Name.length(); ++i)
if (Name[i] == '.')
Name[i] = '_';
Module* M = F->getParent();
F = cast<Function>(M->getOrInsertFunction(Name, FT));
F->setLinkage(GlobalValue::WeakAnyLinkage);
if (F->isDeclaration()) {
Function::arg_iterator args = F->arg_begin();
Value* Val = args++; Val->setName("Val");
Value* Lo = args++; Lo->setName("Lo");
Value* Hi = args++; Hi->setName("High");
BasicBlock* CurBB = BasicBlock::Create("entry", F);
BasicBlock *RevSize = BasicBlock::Create("revsize", CurBB->getParent());
BasicBlock *FwdSize = BasicBlock::Create("fwdsize", CurBB->getParent());
BasicBlock *Compute = BasicBlock::Create("compute", CurBB->getParent());
BasicBlock *Reverse = BasicBlock::Create("reverse", CurBB->getParent());
BasicBlock *RsltBlk = BasicBlock::Create("result", CurBB->getParent());
if (Hi->getType() != Val->getType())
Hi = CastInst::CreateIntegerCast(Hi, Val->getType(), false,
"tmp", CurBB);
if (Lo->getType() != Val->getType())
Lo = CastInst::CreateIntegerCast(Lo, Val->getType(), false,
"tmp", CurBB);
Constant* Zero = ConstantInt::get(Val->getType(), 0);
Constant* One = ConstantInt::get(Val->getType(), 1);
Constant* AllOnes = ConstantInt::getAllOnesValue(Val->getType());
ICmpInst *Cmp = new ICmpInst(ICmpInst::ICMP_ULT, Hi, Lo, "less",CurBB);
BranchInst::Create(RevSize, FwdSize, Cmp, CurBB);
Instruction* FBitSize =
BinaryOperator::CreateSub(Hi, Lo,"fbits", FwdSize);
BranchInst::Create(Compute, FwdSize);
Instruction* RBitSize =
BinaryOperator::CreateSub(Lo, Hi, "rbits", RevSize);
BranchInst::Create(Compute, RevSize);
PHINode *BitSize = PHINode::Create(Val->getType(), "bits", Compute);
BitSize->reserveOperandSpace(2);
BitSize->addIncoming(FBitSize, FwdSize);
BitSize->addIncoming(RBitSize, RevSize);
PHINode *ShiftAmt = PHINode::Create(Val->getType(), "shiftamt", Compute);
ShiftAmt->reserveOperandSpace(2);
ShiftAmt->addIncoming(Lo, FwdSize);
ShiftAmt->addIncoming(Hi, RevSize);
Instruction *BitSizePlusOne =
BinaryOperator::CreateAdd(BitSize, One, "bits", Compute);
Instruction* Mask =
BinaryOperator::CreateShl(AllOnes, BitSizePlusOne, "mask", Compute);
Mask = BinaryOperator::CreateNot(Mask, "mask", Compute);
Instruction* FRes =
BinaryOperator::CreateLShr(Val, ShiftAmt, "fres", Compute);
FRes = BinaryOperator::CreateAnd(FRes, Mask, "fres", Compute);
BranchInst::Create(Reverse, RsltBlk, Cmp, Compute);
PHINode *Count = PHINode::Create(Val->getType(), "count", Reverse);
Count->reserveOperandSpace(2);
Count->addIncoming(BitSizePlusOne, Compute);
PHINode *BitsToShift = PHINode::Create(Val->getType(), "val", Reverse);
BitsToShift->reserveOperandSpace(2);
BitsToShift->addIncoming(FRes, Compute);
PHINode *RRes = PHINode::Create(Val->getType(), "rres", Reverse);
RRes->reserveOperandSpace(2);
RRes->addIncoming(Zero, Compute);
Instruction *Decr = BinaryOperator::CreateSub(Count, One, "decr", Reverse);
Count->addIncoming(Decr, Reverse);
Instruction *Bit =
BinaryOperator::CreateAnd(BitsToShift, One, "bit", Reverse);
Instruction *NewVal =
BinaryOperator::CreateLShr(BitsToShift, One, "rshift", Reverse);
BitsToShift->addIncoming(NewVal, Reverse);
Instruction *NewRes =
BinaryOperator::CreateShl(RRes, One, "lshift", Reverse);
NewRes = BinaryOperator::CreateOr(NewRes, Bit, "addbit", Reverse);
RRes->addIncoming(NewRes, Reverse);
ICmpInst *Cond =
new ICmpInst(ICmpInst::ICMP_EQ, Decr, Zero, "cond", Reverse);
BranchInst::Create(RsltBlk, Reverse, Cond, Reverse);
CurBB = RsltBlk;
PHINode *BitSelect = PHINode::Create(Val->getType(), "part_select", CurBB);
BitSelect->reserveOperandSpace(2);
BitSelect->addIncoming(FRes, Compute);
BitSelect->addIncoming(NewRes, Reverse);
ReturnInst::Create(BitSelect, CurBB);
}
Value *Args[] = {
CI->getOperand(1),
CI->getOperand(2),
CI->getOperand(3)
};
return CallInst::Create(F, Args, array_endof(Args), CI->getName(), CI);
}
static Instruction *LowerPartSet(CallInst *CI) {
Function *F = CI->getCalledFunction();
const FunctionType *FT = F->getFunctionType();
if (!F->isDeclaration() || !FT->getReturnType()->isInteger() ||
FT->getNumParams() != 4 || !FT->getParamType(0)->isInteger() ||
!FT->getParamType(1)->isInteger() || !FT->getParamType(2)->isInteger() ||
!FT->getParamType(3)->isInteger())
return CI;
std::string Name(F->getName());
for (unsigned i = 4; i < Name.length(); ++i)
if (Name[i] == '.')
Name[i] = '_';
Module* M = F->getParent();
F = cast<Function>(M->getOrInsertFunction(Name, FT));
F->setLinkage(GlobalValue::WeakAnyLinkage);
if (F->isDeclaration()) {
Function::arg_iterator args = F->arg_begin();
Value* Val = args++; Val->setName("Val");
Value* Rep = args++; Rep->setName("Rep");
Value* Lo = args++; Lo->setName("Lo");
Value* Hi = args++; Hi->setName("Hi");
const IntegerType* ValTy = cast<IntegerType>(Val->getType());
const IntegerType* RepTy = cast<IntegerType>(Rep->getType());
uint32_t ValBits = ValTy->getBitWidth();
uint32_t RepBits = RepTy->getBitWidth();
ConstantInt* RepBitWidth = ConstantInt::get(Type::Int32Ty, RepBits);
ConstantInt* RepMask = ConstantInt::getAllOnesValue(RepTy);
ConstantInt* ValMask = ConstantInt::getAllOnesValue(ValTy);
ConstantInt* One = ConstantInt::get(Type::Int32Ty, 1);
ConstantInt* ValOne = ConstantInt::get(ValTy, 1);
ConstantInt* Zero = ConstantInt::get(Type::Int32Ty, 0);
ConstantInt* ValZero = ConstantInt::get(ValTy, 0);
BasicBlock* entry = BasicBlock::Create("entry", F, 0);
BasicBlock* large = BasicBlock::Create("large", F, 0);
BasicBlock* small = BasicBlock::Create("small", F, 0);
BasicBlock* reverse = BasicBlock::Create("reverse", F, 0);
BasicBlock* result = BasicBlock::Create("result", F, 0);
ICmpInst* is_forward =
new ICmpInst(ICmpInst::ICMP_ULT, Lo, Hi, "", entry);
SelectInst* Hi_pn = SelectInst::Create(is_forward, Hi, Lo, "", entry);
SelectInst* Lo_pn = SelectInst::Create(is_forward, Lo, Hi, "", entry);
BinaryOperator* NumBits = BinaryOperator::CreateSub(Hi_pn, Lo_pn, "",entry);
NumBits = BinaryOperator::CreateAdd(NumBits, One, "", entry);
if (ValBits > 32) {
Lo = new ZExtInst(Lo_pn, ValTy, "", entry);
} else if (ValBits < 32) {
Lo = new TruncInst(Lo_pn, ValTy, "", entry);
} else {
Lo = Lo_pn;
}
ICmpInst* is_large =
new ICmpInst(ICmpInst::ICMP_ULT, NumBits, RepBitWidth, "", entry);
BranchInst::Create(large, small, is_large, entry);
Instruction* MaskBits =
BinaryOperator::CreateSub(RepBitWidth, NumBits, "", large);
MaskBits = CastInst::CreateIntegerCast(MaskBits, RepMask->getType(),
false, "", large);
BinaryOperator* Mask1 =
BinaryOperator::CreateLShr(RepMask, MaskBits, "", large);
BinaryOperator* Rep2 = BinaryOperator::CreateAnd(Mask1, Rep, "", large);
BranchInst::Create(small, large);
PHINode* Rep3 = PHINode::Create(RepTy, "", small);
Rep3->reserveOperandSpace(2);
Rep3->addIncoming(Rep2, large);
Rep3->addIncoming(Rep, entry);
Value* Rep4 = Rep3;
if (ValBits > RepBits)
Rep4 = new ZExtInst(Rep3, ValTy, "", small);
else if (ValBits < RepBits)
Rep4 = new TruncInst(Rep3, ValTy, "", small);
BranchInst::Create(result, reverse, is_forward, small);
PHINode *Count = PHINode::Create(Type::Int32Ty, "count", reverse);
Count->reserveOperandSpace(2);
Count->addIncoming(NumBits, small);
PHINode *BitsToShift = PHINode::Create(Val->getType(), "val", reverse);
BitsToShift->reserveOperandSpace(2);
BitsToShift->addIncoming(Rep4, small);
PHINode *RRes = PHINode::Create(Val->getType(), "rres", reverse);
RRes->reserveOperandSpace(2);
RRes->addIncoming(ValZero, small);
Instruction *Decr = BinaryOperator::CreateSub(Count, One, "", reverse);
Count->addIncoming(Decr, reverse);
Value *Bit = BinaryOperator::CreateAnd(BitsToShift, ValOne, "", reverse);
Value *NewVal = BinaryOperator::CreateLShr(BitsToShift, ValOne,"", reverse);
BitsToShift->addIncoming(NewVal, reverse);
Instruction *NewRes = BinaryOperator::CreateShl(RRes, ValOne, "", reverse);
NewRes = BinaryOperator::CreateOr(NewRes, Bit, "", reverse);
RRes->addIncoming(NewRes, reverse);
ICmpInst *Cond = new ICmpInst(ICmpInst::ICMP_EQ, Decr, Zero, "", reverse);
BranchInst::Create(result, reverse, Cond, reverse);
PHINode *Rplcmnt = PHINode::Create(Val->getType(), "", result);
Rplcmnt->reserveOperandSpace(2);
Rplcmnt->addIncoming(NewRes, reverse);
Rplcmnt->addIncoming(Rep4, small);
Value* t0 = CastInst::CreateIntegerCast(NumBits,ValTy,false,"",result);
Value* t1 = BinaryOperator::CreateShl(ValMask, Lo, "", result);
Value* t2 = BinaryOperator::CreateNot(t1, "", result);
Value* t3 = BinaryOperator::CreateShl(t1, t0, "", result);
Value* t4 = BinaryOperator::CreateOr(t2, t3, "", result);
Value* t5 = BinaryOperator::CreateAnd(t4, Val, "", result);
Value* t6 = BinaryOperator::CreateShl(Rplcmnt, Lo, "", result);
Value* Rslt = BinaryOperator::CreateOr(t5, t6, "part_set", result);
ReturnInst::Create(Rslt, result);
}
Value *Args[] = {
CI->getOperand(1),
CI->getOperand(2),
CI->getOperand(3),
CI->getOperand(4)
};
return CallInst::Create(F, Args, array_endof(Args), CI->getName(), CI);
}
static void ReplaceFPIntrinsicWithCall(CallInst *CI, Constant *FCache,
Constant *DCache, Constant *LDCache,
const char *Fname, const char *Dname,
const char *LDname) {
switch (CI->getOperand(1)->getType()->getTypeID()) {
default: assert(0 && "Invalid type in intrinsic"); abort();
case Type::FloatTyID:
ReplaceCallWith(Fname, CI, CI->op_begin()+1, CI->op_end(),
Type::FloatTy, FCache);
break;
case Type::DoubleTyID:
ReplaceCallWith(Dname, CI, CI->op_begin()+1, CI->op_end(),
Type::DoubleTy, DCache);
break;
case Type::X86_FP80TyID:
case Type::FP128TyID:
case Type::PPC_FP128TyID:
ReplaceCallWith(LDname, CI, CI->op_begin()+1, CI->op_end(),
CI->getOperand(1)->getType(), LDCache);
break;
}
}
void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
Function *Callee = CI->getCalledFunction();
assert(Callee && "Cannot lower an indirect call!");
switch (Callee->getIntrinsicID()) {
case Intrinsic::not_intrinsic:
cerr << "Cannot lower a call to a non-intrinsic function '"
<< Callee->getName() << "'!\n";
abort();
default:
cerr << "Error: Code generator does not support intrinsic function '"
<< Callee->getName() << "'!\n";
abort();
case Intrinsic::setjmp: {
static Constant *SetjmpFCache = 0;
Value *V = ReplaceCallWith("setjmp", CI, CI->op_begin()+1, CI->op_end(),
Type::Int32Ty, SetjmpFCache);
if (CI->getType() != Type::VoidTy)
CI->replaceAllUsesWith(V);
break;
}
case Intrinsic::sigsetjmp:
if (CI->getType() != Type::VoidTy)
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break;
case Intrinsic::longjmp: {
static Constant *LongjmpFCache = 0;
ReplaceCallWith("longjmp", CI, CI->op_begin()+1, CI->op_end(),
Type::VoidTy, LongjmpFCache);
break;
}
case Intrinsic::siglongjmp: {
static Constant *AbortFCache = 0;
ReplaceCallWith("abort", CI, CI->op_end(), CI->op_end(),
Type::VoidTy, AbortFCache);
break;
}
case Intrinsic::ctpop:
CI->replaceAllUsesWith(LowerCTPOP(CI->getOperand(1), CI));
break;
case Intrinsic::bswap:
CI->replaceAllUsesWith(LowerBSWAP(CI->getOperand(1), CI));
break;
case Intrinsic::ctlz:
CI->replaceAllUsesWith(LowerCTLZ(CI->getOperand(1), CI));
break;
case Intrinsic::cttz: {
Value *Src = CI->getOperand(1);
Value *NotSrc = BinaryOperator::CreateNot(Src, Src->getName()+".not", CI);
Value *SrcM1 = ConstantInt::get(Src->getType(), 1);
SrcM1 = BinaryOperator::CreateSub(Src, SrcM1, "", CI);
Src = LowerCTPOP(BinaryOperator::CreateAnd(NotSrc, SrcM1, "", CI), CI);
CI->replaceAllUsesWith(Src);
break;
}
case Intrinsic::part_select:
CI->replaceAllUsesWith(LowerPartSelect(CI));
break;
case Intrinsic::part_set:
CI->replaceAllUsesWith(LowerPartSet(CI));
break;
case Intrinsic::stacksave:
case Intrinsic::stackrestore: {
static bool Warned = false;
if (!Warned)
cerr << "WARNING: this target does not support the llvm.stack"
<< (Callee->getIntrinsicID() == Intrinsic::stacksave ?
"save" : "restore") << " intrinsic.\n";
Warned = true;
if (Callee->getIntrinsicID() == Intrinsic::stacksave)
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break;
}
case Intrinsic::returnaddress:
case Intrinsic::frameaddress:
cerr << "WARNING: this target does not support the llvm."
<< (Callee->getIntrinsicID() == Intrinsic::returnaddress ?
"return" : "frame") << "address intrinsic.\n";
CI->replaceAllUsesWith(ConstantPointerNull::get(
cast<PointerType>(CI->getType())));
break;
case Intrinsic::prefetch:
break;
case Intrinsic::pcmarker:
break; case Intrinsic::readcyclecounter: {
cerr << "WARNING: this target does not support the llvm.readcyclecoun"
<< "ter intrinsic. It is being lowered to a constant 0\n";
CI->replaceAllUsesWith(ConstantInt::get(Type::Int64Ty, 0));
break;
}
case Intrinsic::dbg_stoppoint:
case Intrinsic::dbg_region_start:
case Intrinsic::dbg_region_end:
case Intrinsic::dbg_func_start:
case Intrinsic::dbg_declare:
break;
case Intrinsic::eh_exception:
case Intrinsic::eh_selector_i32:
case Intrinsic::eh_selector_i64:
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break;
case Intrinsic::eh_typeid_for_i32:
case Intrinsic::eh_typeid_for_i64:
CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
break;
case Intrinsic::var_annotation:
break;
case Intrinsic::memcpy: {
static Constant *MemcpyFCache = 0;
Value *Size = CI->getOperand(3);
const Type *IntPtr = TD.getIntPtrType();
if (Size->getType()->getPrimitiveSizeInBits() <
IntPtr->getPrimitiveSizeInBits())
Size = new ZExtInst(Size, IntPtr, "", CI);
else if (Size->getType()->getPrimitiveSizeInBits() >
IntPtr->getPrimitiveSizeInBits())
Size = new TruncInst(Size, IntPtr, "", CI);
Value *Ops[3];
Ops[0] = CI->getOperand(1);
Ops[1] = CI->getOperand(2);
Ops[2] = Size;
ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getOperand(1)->getType(),
MemcpyFCache);
break;
}
case Intrinsic::memmove: {
static Constant *MemmoveFCache = 0;
Value *Size = CI->getOperand(3);
const Type *IntPtr = TD.getIntPtrType();
if (Size->getType()->getPrimitiveSizeInBits() <
IntPtr->getPrimitiveSizeInBits())
Size = new ZExtInst(Size, IntPtr, "", CI);
else if (Size->getType()->getPrimitiveSizeInBits() >
IntPtr->getPrimitiveSizeInBits())
Size = new TruncInst(Size, IntPtr, "", CI);
Value *Ops[3];
Ops[0] = CI->getOperand(1);
Ops[1] = CI->getOperand(2);
Ops[2] = Size;
ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getOperand(1)->getType(),
MemmoveFCache);
break;
}
case Intrinsic::memset: {
static Constant *MemsetFCache = 0;
Value *Size = CI->getOperand(3);
const Type *IntPtr = TD.getIntPtrType();
if (Size->getType()->getPrimitiveSizeInBits() <
IntPtr->getPrimitiveSizeInBits())
Size = new ZExtInst(Size, IntPtr, "", CI);
else if (Size->getType()->getPrimitiveSizeInBits() >
IntPtr->getPrimitiveSizeInBits())
Size = new TruncInst(Size, IntPtr, "", CI);
Value *Ops[3];
Ops[0] = CI->getOperand(1);
Ops[1] = new ZExtInst(CI->getOperand(2), Type::Int32Ty, "", CI);
Ops[2] = Size;
ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getOperand(1)->getType(),
MemsetFCache);
break;
}
case Intrinsic::sqrt: {
static Constant *sqrtFCache = 0;
static Constant *sqrtDCache = 0;
static Constant *sqrtLDCache = 0;
ReplaceFPIntrinsicWithCall(CI, sqrtFCache, sqrtDCache, sqrtLDCache,
"sqrtf", "sqrt", "sqrtl");
break;
}
case Intrinsic::log: {
static Constant *logFCache = 0;
static Constant *logDCache = 0;
static Constant *logLDCache = 0;
ReplaceFPIntrinsicWithCall(CI, logFCache, logDCache, logLDCache,
"logf", "log", "logl");
break;
}
case Intrinsic::log2: {
static Constant *log2FCache = 0;
static Constant *log2DCache = 0;
static Constant *log2LDCache = 0;
ReplaceFPIntrinsicWithCall(CI, log2FCache, log2DCache, log2LDCache,
"log2f", "log2", "log2l");
break;
}
case Intrinsic::log10: {
static Constant *log10FCache = 0;
static Constant *log10DCache = 0;
static Constant *log10LDCache = 0;
ReplaceFPIntrinsicWithCall(CI, log10FCache, log10DCache, log10LDCache,
"log10f", "log10", "log10l");
break;
}
case Intrinsic::exp: {
static Constant *expFCache = 0;
static Constant *expDCache = 0;
static Constant *expLDCache = 0;
ReplaceFPIntrinsicWithCall(CI, expFCache, expDCache, expLDCache,
"expf", "exp", "expl");
break;
}
case Intrinsic::exp2: {
static Constant *exp2FCache = 0;
static Constant *exp2DCache = 0;
static Constant *exp2LDCache = 0;
ReplaceFPIntrinsicWithCall(CI, exp2FCache, exp2DCache, exp2LDCache,
"exp2f", "exp2", "exp2l");
break;
}
case Intrinsic::pow: {
static Constant *powFCache = 0;
static Constant *powDCache = 0;
static Constant *powLDCache = 0;
ReplaceFPIntrinsicWithCall(CI, powFCache, powDCache, powLDCache,
"powf", "pow", "powl");
break;
}
case Intrinsic::flt_rounds:
if (CI->getType() != Type::VoidTy)
CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
break;
}
assert(CI->use_empty() &&
"Lowering should have eliminated any uses of the intrinsic call!");
CI->eraseFromParent();
}