X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FIntrinsicLowering.cpp;h=2c95e9e7d0d3f5f3dae887c54b3304720a4cbd04;hb=4a524934577d85e5095df8ea62ad6a3261076d0c;hp=2c64b20a32f6c5ea2352c5aee78b8017e749b4ed;hpb=c6eb6d72550aa3f7241141e3e28520dfef738c81;p=oota-llvm.git diff --git a/lib/CodeGen/IntrinsicLowering.cpp b/lib/CodeGen/IntrinsicLowering.cpp index 2c64b20a32f..2c95e9e7d0d 100644 --- a/lib/CodeGen/IntrinsicLowering.cpp +++ b/lib/CodeGen/IntrinsicLowering.cpp @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -11,28 +11,52 @@ // //===----------------------------------------------------------------------===// -#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/IR/CallSite.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/IRBuilder.h" +#include "llvm/IR/Module.h" +#include "llvm/IR/Type.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" using namespace llvm; template static void EnsureFunctionExists(Module &M, const char *Name, ArgIt ArgBegin, ArgIt ArgEnd, - const Type *RetTy) { + Type *RetTy) { // Insert a correctly-typed definition now. - std::vector ParamTys; + std::vector 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) { + // Insert definitions for all the floating point types. + switch((int)Fn->arg_begin()->getType()->getTypeID()) { + case Type::FloatTyID: + EnsureFunctionExists(M, FName, Fn->arg_begin(), Fn->arg_end(), + Type::getFloatTy(M.getContext())); + break; + case Type::DoubleTyID: + EnsureFunctionExists(M, DName, Fn->arg_begin(), Fn->arg_end(), + Type::getDoubleTy(M.getContext())); + 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; + } +} + /// ReplaceCallWith - This function is used when we want to lower an intrinsic /// call to a call of an external function. This handles hard cases such as /// when there was already a prototype for the external function, and if that @@ -40,156 +64,193 @@ static void EnsureFunctionExists(Module &M, const char *Name, template static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI, ArgIt ArgBegin, ArgIt ArgEnd, - const Type *RetTy, Constant *&FCache) { - if (!FCache) { - // If we haven't already looked up this function, check to see if the - // program already contains a function with this name. - Module *M = CI->getParent()->getParent()->getParent(); - // Get or insert the definition now. - std::vector ParamTys; - for (ArgIt I = ArgBegin; I != ArgEnd; ++I) - ParamTys.push_back((*I)->getType()); - FCache = M->getOrInsertFunction(NewFn, - FunctionType::get(RetTy, ParamTys, false)); - } - - SmallVector Operands(ArgBegin, ArgEnd); - CallInst *NewCI = new CallInst(FCache, &Operands[0], Operands.size(), - CI->getName(), CI); + Type *RetTy) { + // If we haven't already looked up this function, check to see if the + // program already contains a function with this name. + Module *M = CI->getParent()->getParent()->getParent(); + // Get or insert the definition now. + std::vector ParamTys; + for (ArgIt I = ArgBegin; I != ArgEnd; ++I) + ParamTys.push_back((*I)->getType()); + Constant* FCache = M->getOrInsertFunction(NewFn, + FunctionType::get(RetTy, ParamTys, false)); + + IRBuilder<> Builder(CI->getParent(), CI); + SmallVector Args(ArgBegin, ArgEnd); + CallInst *NewCI = Builder.CreateCall(FCache, Args); + NewCI->setName(CI->getName()); if (!CI->use_empty()) CI->replaceAllUsesWith(NewCI); return NewCI; } +// VisualStudio defines setjmp as _setjmp +#if defined(_MSC_VER) && defined(setjmp) && \ + !defined(setjmp_undefined_for_msvc) +# pragma push_macro("setjmp") +# undef setjmp +# define setjmp_undefined_for_msvc +#endif + void IntrinsicLowering::AddPrototypes(Module &M) { + LLVMContext &Context = M.getContext(); 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); + Type::getInt32Ty(M.getContext())); break; case Intrinsic::longjmp: EnsureFunctionExists(M, "longjmp", I->arg_begin(), I->arg_end(), - Type::VoidTy); + Type::getVoidTy(M.getContext())); break; case Intrinsic::siglongjmp: EnsureFunctionExists(M, "abort", I->arg_end(), I->arg_end(), - Type::VoidTy); + Type::getVoidTy(M.getContext())); + break; + case Intrinsic::memcpy: + M.getOrInsertFunction("memcpy", + Type::getInt8PtrTy(Context), + Type::getInt8PtrTy(Context), + Type::getInt8PtrTy(Context), + DL.getIntPtrType(Context), nullptr); + break; + case Intrinsic::memmove: + M.getOrInsertFunction("memmove", + Type::getInt8PtrTy(Context), + Type::getInt8PtrTy(Context), + Type::getInt8PtrTy(Context), + DL.getIntPtrType(Context), nullptr); break; - case Intrinsic::memcpy_i32: - case Intrinsic::memcpy_i64: - M.getOrInsertFunction("memcpy", PointerType::get(Type::Int8Ty), - PointerType::get(Type::Int8Ty), - PointerType::get(Type::Int8Ty), - TD.getIntPtrType(), (Type *)0); + case Intrinsic::memset: + M.getOrInsertFunction("memset", + Type::getInt8PtrTy(Context), + Type::getInt8PtrTy(Context), + Type::getInt32Ty(M.getContext()), + DL.getIntPtrType(Context), nullptr); break; - case Intrinsic::memmove_i32: - case Intrinsic::memmove_i64: - M.getOrInsertFunction("memmove", PointerType::get(Type::Int8Ty), - PointerType::get(Type::Int8Ty), - PointerType::get(Type::Int8Ty), - TD.getIntPtrType(), (Type *)0); + case Intrinsic::sqrt: + EnsureFPIntrinsicsExist(M, I, "sqrtf", "sqrt", "sqrtl"); break; - case Intrinsic::memset_i32: - case Intrinsic::memset_i64: - M.getOrInsertFunction("memset", PointerType::get(Type::Int8Ty), - PointerType::get(Type::Int8Ty), Type::Int32Ty, - TD.getIntPtrType(), (Type *)0); + case Intrinsic::sin: + EnsureFPIntrinsicsExist(M, I, "sinf", "sin", "sinl"); break; - case Intrinsic::sqrt_f32: - case Intrinsic::sqrt_f64: - if(I->arg_begin()->getType() == Type::FloatTy) - EnsureFunctionExists(M, "sqrtf", I->arg_begin(), I->arg_end(), - Type::FloatTy); - else - EnsureFunctionExists(M, "sqrt", I->arg_begin(), I->arg_end(), - Type::DoubleTy); + 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; } } /// LowerBSWAP - Emit the code to lower bswap of V before the specified /// instruction IP. -static Value *LowerBSWAP(Value *V, Instruction *IP) { - assert(V->getType()->isInteger() && "Can't bswap a non-integer type!"); +static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) { + assert(V->getType()->isIntegerTy() && "Can't bswap a non-integer type!"); unsigned BitSize = V->getType()->getPrimitiveSizeInBits(); + IRBuilder<> Builder(IP->getParent(), IP); + switch(BitSize) { - default: assert(0 && "Unhandled type size of value to byteswap!"); + default: llvm_unreachable("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); + Value *Tmp1 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8), + "bswap.2"); + Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8), + "bswap.1"); + V = Builder.CreateOr(Tmp1, Tmp2, "bswap.i16"); 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, Tmp3, "bswap.i32", IP); + Value *Tmp4 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24), + "bswap.4"); + Value *Tmp3 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8), + "bswap.3"); + Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8), + "bswap.2"); + Value *Tmp1 = Builder.CreateLShr(V,ConstantInt::get(V->getType(), 24), + "bswap.1"); + Tmp3 = Builder.CreateAnd(Tmp3, + ConstantInt::get(Type::getInt32Ty(Context), 0xFF0000), + "bswap.and3"); + Tmp2 = Builder.CreateAnd(Tmp2, + ConstantInt::get(Type::getInt32Ty(Context), 0xFF00), + "bswap.and2"); + Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or1"); + Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or2"); + V = Builder.CreateOr(Tmp4, Tmp2, "bswap.i32"); 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); + Value *Tmp8 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 56), + "bswap.8"); + Value *Tmp7 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 40), + "bswap.7"); + Value *Tmp6 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24), + "bswap.6"); + Value *Tmp5 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8), + "bswap.5"); + Value* Tmp4 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8), + "bswap.4"); + Value* Tmp3 = Builder.CreateLShr(V, + ConstantInt::get(V->getType(), 24), + "bswap.3"); + Value* Tmp2 = Builder.CreateLShr(V, + ConstantInt::get(V->getType(), 40), + "bswap.2"); + Value* Tmp1 = Builder.CreateLShr(V, + ConstantInt::get(V->getType(), 56), + "bswap.1"); + Tmp7 = Builder.CreateAnd(Tmp7, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF000000000000ULL), + "bswap.and7"); + Tmp6 = Builder.CreateAnd(Tmp6, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF0000000000ULL), + "bswap.and6"); + Tmp5 = Builder.CreateAnd(Tmp5, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF00000000ULL), + "bswap.and5"); + Tmp4 = Builder.CreateAnd(Tmp4, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF000000ULL), + "bswap.and4"); + Tmp3 = Builder.CreateAnd(Tmp3, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF0000ULL), + "bswap.and3"); + Tmp2 = Builder.CreateAnd(Tmp2, + ConstantInt::get(Type::getInt64Ty(Context), + 0xFF00ULL), + "bswap.and2"); + Tmp8 = Builder.CreateOr(Tmp8, Tmp7, "bswap.or1"); + Tmp6 = Builder.CreateOr(Tmp6, Tmp5, "bswap.or2"); + Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or3"); + Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or4"); + Tmp8 = Builder.CreateOr(Tmp8, Tmp6, "bswap.or5"); + Tmp4 = Builder.CreateOr(Tmp4, Tmp2, "bswap.or6"); + V = Builder.CreateOr(Tmp8, Tmp4, "bswap.i64"); break; } } @@ -198,8 +259,8 @@ static Value *LowerBSWAP(Value *V, Instruction *IP) { /// LowerCTPOP - Emit the code to lower ctpop of V before the specified /// instruction IP. -static Value *LowerCTPOP(Value *V, Instruction *IP) { - assert(V->getType()->isInteger() && "Can't ctpop a non-integer type!"); +static Value *LowerCTPOP(LLVMContext &Context, Value *V, Instruction *IP) { + assert(V->getType()->isIntegerTy() && "Can't ctpop a non-integer type!"); static const uint64_t MaskValues[6] = { 0x5555555555555555ULL, 0x3333333333333333ULL, @@ -207,284 +268,155 @@ static Value *LowerCTPOP(Value *V, Instruction *IP) { 0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL }; - unsigned BitSize = V->getType()->getPrimitiveSizeInBits(); + IRBuilder<> Builder(IP->getParent(), IP); - for (unsigned i = 1, ct = 0; i != BitSize; i <<= 1, ++ct) { - Value *MaskCst = ConstantInt::get(V->getType(), MaskValues[ct]); - Value *LHS = BinaryOperator::createAnd(V, MaskCst, "cppop.and1", IP); - Value *VShift = BinaryOperator::createLShr(V, - ConstantInt::get(V->getType(), i), "ctpop.sh", IP); - Value *RHS = BinaryOperator::createAnd(VShift, MaskCst, "cppop.and2", IP); - V = BinaryOperator::createAdd(LHS, RHS, "ctpop.step", IP); + 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 = Builder.CreateAnd(PartValue, MaskCst, "cppop.and1"); + Value *VShift = Builder.CreateLShr(PartValue, + ConstantInt::get(V->getType(), i), + "ctpop.sh"); + Value *RHS = Builder.CreateAnd(VShift, MaskCst, "cppop.and2"); + PartValue = Builder.CreateAdd(LHS, RHS, "ctpop.step"); + } + Count = Builder.CreateAdd(PartValue, Count, "ctpop.part"); + if (BitSize > 64) { + V = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 64), + "ctpop.part.sh"); + BitSize -= 64; + } } - return CastInst::createIntegerCast(V, Type::Int32Ty, false, "ctpop", IP); + return Count; } /// LowerCTLZ - Emit the code to lower ctlz of V before the specified /// instruction IP. -static Value *LowerCTLZ(Value *V, Instruction *IP) { +static Value *LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP) { + + IRBuilder<> Builder(IP->getParent(), IP); unsigned BitSize = V->getType()->getPrimitiveSizeInBits(); - for (unsigned i = 1; i != BitSize; i <<= 1) { + 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); + ShVal = Builder.CreateLShr(V, ShVal, "ctlz.sh"); + V = Builder.CreateOr(V, ShVal, "ctlz.step"); } - V = BinaryOperator::createNot(V, "", IP); - return LowerCTPOP(V, IP); + V = Builder.CreateNot(V); + return LowerCTPOP(Context, V, IP); } -/// Convert the llvm.bit.part_select.iX.iY.iZ intrinsic. This intrinsic takes -/// three integer operands of arbitrary bit width. The first operand is the -/// value from which to select the bits. The second and third operands define a -/// range of bits to select. The result is the bits selected and has a -/// corresponding width of Left-Right (second operand - third operand). -/// @see IEEE 1666-2005, System C, Section 7.2.6, pg 175. -/// @brief Lowering of llvm.bit.part_select intrinsic. -static Instruction *LowerBitPartSelect(CallInst *CI) { - // Make sure we're dealing with a part select intrinsic here - 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; - - // Get the intrinsic implementation function by converting all the . to _ - // in the intrinsic's function name and then reconstructing the function - // declaration. - std::string Name(F->getName()); - for (unsigned i = 4; i < Name.length(); ++i) - if (Name[i] == '.') - Name[i] = '_'; - Module* M = F->getParent(); - F = cast(M->getOrInsertFunction(Name, FT)); - F->setLinkage(GlobalValue::InternalLinkage); - - // If we haven't defined the impl function yet, do so now - if (F->isDeclaration()) { - - // Get the arguments to the function - Value* Val = F->getOperand(0); - Value* Left = F->getOperand(1); - Value* Right = F->getOperand(2); - - // We want to select a range of bits here such that [Left, Right] is shifted - // down to the low bits. However, it is quite possible that Left is smaller - // than Right in which case the bits have to be reversed. - - // Create the blocks we will need for the two cases (forward, reverse) - BasicBlock* CurBB = new BasicBlock("entry", F); - BasicBlock *RevSize = new BasicBlock("revsize", CurBB->getParent()); - BasicBlock *FwdSize = new BasicBlock("fwdsize", CurBB->getParent()); - BasicBlock *Compute = new BasicBlock("compute", CurBB->getParent()); - BasicBlock *Reverse = new BasicBlock("reverse", CurBB->getParent()); - BasicBlock *RsltBlk = new BasicBlock("result", CurBB->getParent()); - - // Cast Left and Right to the size of Val so the widths are all the same - if (Left->getType() != Val->getType()) - Left = CastInst::createIntegerCast(Left, Val->getType(), false, - "tmp", CurBB); - if (Right->getType() != Val->getType()) - Right = CastInst::createIntegerCast(Right, Val->getType(), false, - "tmp", CurBB); - - // Compute a few things that both cases will need, up front. - Constant* Zero = ConstantInt::get(Val->getType(), 0); - Constant* One = ConstantInt::get(Val->getType(), 1); - Constant* AllOnes = ConstantInt::getAllOnesValue(Val->getType()); - - // Compare the Left and Right bit positions. This is used to determine - // which case we have (forward or reverse) - ICmpInst *Cmp = new ICmpInst(ICmpInst::ICMP_ULT, Left, Right, "less",CurBB); - new BranchInst(RevSize, FwdSize, Cmp, CurBB); - - // First, copmute the number of bits in the forward case. - Instruction* FBitSize = - BinaryOperator::createSub(Left, Right,"fbits", FwdSize); - new BranchInst(Compute, FwdSize); - - // Second, compute the number of bits in the reverse case. - Instruction* RBitSize = - BinaryOperator::createSub(Right, Left, "rbits", RevSize); - new BranchInst(Compute, RevSize); - - // Now, compute the bit range. Start by getting the bitsize and the shift - // amount (either Left or Right) from PHI nodes. Then we compute a mask for - // the number of bits we want in the range. We shift the bits down to the - // least significant bits, apply the mask to zero out unwanted high bits, - // and we have computed the "forward" result. It may still need to be - // reversed. - - // Get the BitSize from one of the two subtractions - PHINode *BitSize = new PHINode(Val->getType(), "bits", Compute); - BitSize->reserveOperandSpace(2); - BitSize->addIncoming(FBitSize, FwdSize); - BitSize->addIncoming(RBitSize, RevSize); - - // Get the ShiftAmount as the smaller of Left/Right - PHINode *ShiftAmt = new PHINode(Val->getType(), "shiftamt", Compute); - ShiftAmt->reserveOperandSpace(2); - ShiftAmt->addIncoming(Right, FwdSize); - ShiftAmt->addIncoming(Left, RevSize); - - // Increment the bit size - Instruction *BitSizePlusOne = - BinaryOperator::createAdd(BitSize, One, "bits", Compute); - - // Create a Mask to zero out the high order bits. - Instruction* Mask = - BinaryOperator::createShl(AllOnes, BitSizePlusOne, "mask", Compute); - Mask = BinaryOperator::createNot(Mask, "mask", Compute); - - // Shift the bits down and apply the mask - Instruction* FRes = - BinaryOperator::createLShr(Val, ShiftAmt, "fres", Compute); - FRes = BinaryOperator::createAnd(FRes, Mask, "fres", Compute); - new BranchInst(Reverse, RsltBlk, Cmp, Compute); - - // In the Reverse block we have the mask already in FRes but we must reverse - // it by shifting FRes bits right and putting them in RRes by shifting them - // in from left. - - // First set up our loop counters - PHINode *Count = new PHINode(Val->getType(), "count", Reverse); - Count->reserveOperandSpace(2); - Count->addIncoming(BitSizePlusOne, Compute); - - // Next, get the value that we are shifting. - PHINode *BitsToShift = new PHINode(Val->getType(), "val", Reverse); - BitsToShift->reserveOperandSpace(2); - BitsToShift->addIncoming(FRes, Compute); - - // Finally, get the result of the last computation - PHINode *RRes = new PHINode(Val->getType(), "rres", Reverse); - RRes->reserveOperandSpace(2); - RRes->addIncoming(Zero, Compute); - - // Decrement the counter - Instruction *Decr = BinaryOperator::createSub(Count, One, "decr", Reverse); - Count->addIncoming(Decr, Reverse); - - // Compute the Bit that we want to move - Instruction *Bit = - BinaryOperator::createAnd(BitsToShift, One, "bit", Reverse); - - // Compute the new value for next iteration. - Instruction *NewVal = - BinaryOperator::createLShr(BitsToShift, One, "rshift", Reverse); - BitsToShift->addIncoming(NewVal, Reverse); - - // Shift the bit into the low bits of the result. - Instruction *NewRes = - BinaryOperator::createShl(RRes, One, "lshift", Reverse); - NewRes = BinaryOperator::createOr(NewRes, Bit, "addbit", Reverse); - RRes->addIncoming(NewRes, Reverse); - - // Terminate loop if we've moved all the bits. - ICmpInst *Cond = - new ICmpInst(ICmpInst::ICMP_EQ, Decr, Zero, "cond", Reverse); - new BranchInst(RsltBlk, Reverse, Cond, Reverse); - - // Finally, in the result block, select one of the two results with a PHI - // node and return the result; - CurBB = RsltBlk; - PHINode *BitSelect = new PHINode(Val->getType(), "part_select", CurBB); - BitSelect->reserveOperandSpace(2); - BitSelect->addIncoming(FRes, Compute); - BitSelect->addIncoming(NewRes, Reverse); - new ReturnInst(BitSelect, CurBB); - } - - // Return a call to the implementation function - Value *Args[3]; - Args[0] = CI->getOperand(0); - Args[1] = CI->getOperand(1); - Args[2] = CI->getOperand(2); - return new CallInst(F, Args, 3, CI->getName(), CI); +static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname, + const char *Dname, + const char *LDname) { + CallSite CS(CI); + switch (CI->getArgOperand(0)->getType()->getTypeID()) { + default: llvm_unreachable("Invalid type in intrinsic"); + case Type::FloatTyID: + ReplaceCallWith(Fname, CI, CS.arg_begin(), CS.arg_end(), + Type::getFloatTy(CI->getContext())); + break; + case Type::DoubleTyID: + ReplaceCallWith(Dname, CI, CS.arg_begin(), CS.arg_end(), + Type::getDoubleTy(CI->getContext())); + break; + case Type::X86_FP80TyID: + case Type::FP128TyID: + case Type::PPC_FP128TyID: + ReplaceCallWith(LDname, CI, CS.arg_begin(), CS.arg_end(), + CI->getArgOperand(0)->getType()); + break; + } } - void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) { - Function *Callee = CI->getCalledFunction(); + IRBuilder<> Builder(CI->getParent(), CI); + LLVMContext &Context = CI->getContext(); + + const Function *Callee = CI->getCalledFunction(); assert(Callee && "Cannot lower an indirect call!"); + CallSite CS(CI); switch (Callee->getIntrinsicID()) { case Intrinsic::not_intrinsic: - cerr << "Cannot lower a call to a non-intrinsic function '" - << Callee->getName() << "'!\n"; - abort(); + report_fatal_error("Cannot lower a call to a non-intrinsic function '"+ + Callee->getName() + "'!"); default: - cerr << "Error: Code generator does not support intrinsic function '" - << Callee->getName() << "'!\n"; - abort(); + report_fatal_error("Code generator does not support intrinsic function '"+ + Callee->getName()+"'!"); + + case Intrinsic::expect: { + // Just replace __builtin_expect(exp, c) with EXP. + Value *V = CI->getArgOperand(0); + CI->replaceAllUsesWith(V); + break; + } // The setjmp/longjmp intrinsics should only exist in the code if it was // never optimized (ie, right out of the CFE), or if it has been hacked on // by the lowerinvoke pass. In both cases, the right thing to do is to // convert the call to an explicit setjmp or longjmp call. 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) + Value *V = ReplaceCallWith("setjmp", CI, CS.arg_begin(), CS.arg_end(), + Type::getInt32Ty(Context)); + if (!CI->getType()->isVoidTy()) CI->replaceAllUsesWith(V); break; } case Intrinsic::sigsetjmp: - if (CI->getType() != Type::VoidTy) + if (!CI->getType()->isVoidTy()) 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); + ReplaceCallWith("longjmp", CI, CS.arg_begin(), CS.arg_end(), + Type::getVoidTy(Context)); break; } case Intrinsic::siglongjmp: { // Insert the call to abort - static Constant *AbortFCache = 0; - ReplaceCallWith("abort", CI, CI->op_end(), CI->op_end(), - Type::VoidTy, AbortFCache); + ReplaceCallWith("abort", CI, CS.arg_end(), CS.arg_end(), + Type::getVoidTy(Context)); break; } case Intrinsic::ctpop: - CI->replaceAllUsesWith(LowerCTPOP(CI->getOperand(1), CI)); + CI->replaceAllUsesWith(LowerCTPOP(Context, CI->getArgOperand(0), CI)); break; case Intrinsic::bswap: - CI->replaceAllUsesWith(LowerBSWAP(CI->getOperand(1), CI)); + CI->replaceAllUsesWith(LowerBSWAP(Context, CI->getArgOperand(0), CI)); break; case Intrinsic::ctlz: - CI->replaceAllUsesWith(LowerCTLZ(CI->getOperand(1), CI)); + CI->replaceAllUsesWith(LowerCTLZ(Context, CI->getArgOperand(0), CI)); break; case Intrinsic::cttz: { // cttz(x) -> ctpop(~X & (X-1)) - 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); + Value *Src = CI->getArgOperand(0); + Value *NotSrc = Builder.CreateNot(Src); + NotSrc->setName(Src->getName() + ".not"); + Value *SrcM1 = ConstantInt::get(Src->getType(), 1); + SrcM1 = Builder.CreateSub(Src, SrcM1); + Src = LowerCTPOP(Context, Builder.CreateAnd(NotSrc, SrcM1), CI); CI->replaceAllUsesWith(Src); break; } - case Intrinsic::part_select: - CI->replaceAllUsesWith(LowerBitPartSelect(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 ? + errs() << "WARNING: this target does not support the llvm.stack" + << (Callee->getIntrinsicID() == Intrinsic::stacksave ? "save" : "restore") << " intrinsic.\n"; Warned = true; if (Callee->getIntrinsicID() == Intrinsic::stacksave) @@ -494,8 +426,8 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) { case Intrinsic::returnaddress: case Intrinsic::frameaddress: - cerr << "WARNING: this target does not support the llvm." - << (Callee->getIntrinsicID() == Intrinsic::returnaddress ? + errs() << "WARNING: this target does not support the llvm." + << (Callee->getIntrinsicID() == Intrinsic::returnaddress ? "return" : "frame") << "address intrinsic.\n"; CI->replaceAllUsesWith(ConstantPointerNull::get( cast(CI->getType()))); @@ -507,95 +439,163 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) { case Intrinsic::pcmarker: break; // Simply strip out pcmarker on unsupported architectures 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)); + errs() << "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::getInt64Ty(Context), 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: - case Intrinsic::eh_exception: - case Intrinsic::eh_selector: - case Intrinsic::eh_filter: - break; // Simply strip out debugging and eh intrinsics - - case Intrinsic::memcpy_i32: - case Intrinsic::memcpy_i64: { - 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); + break; // Simply strip out debugging intrinsics + + case Intrinsic::eh_typeid_for: + // Return something different to eh_selector. + CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1)); + break; + + case Intrinsic::annotation: + case Intrinsic::ptr_annotation: + // Just drop the annotation, but forward the value + CI->replaceAllUsesWith(CI->getOperand(0)); + break; + + case Intrinsic::assume: + case Intrinsic::var_annotation: + break; // Strip out these intrinsics + + case Intrinsic::memcpy: { + Type *IntPtr = DL.getIntPtrType(Context); + Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr, + /* isSigned */ false); Value *Ops[3]; - Ops[0] = CI->getOperand(1); - Ops[1] = CI->getOperand(2); + Ops[0] = CI->getArgOperand(0); + Ops[1] = CI->getArgOperand(1); Ops[2] = Size; - ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getOperand(1)->getType(), - MemcpyFCache); - break; - } - case Intrinsic::memmove_i32: - case Intrinsic::memmove_i64: { - 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); + ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getArgOperand(0)->getType()); + break; + } + case Intrinsic::memmove: { + Type *IntPtr = DL.getIntPtrType(Context); + Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr, + /* isSigned */ false); Value *Ops[3]; - Ops[0] = CI->getOperand(1); - Ops[1] = CI->getOperand(2); + Ops[0] = CI->getArgOperand(0); + Ops[1] = CI->getArgOperand(1); Ops[2] = Size; - ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getOperand(1)->getType(), - MemmoveFCache); - break; - } - case Intrinsic::memset_i32: - case Intrinsic::memset_i64: { - 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); + ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getArgOperand(0)->getType()); + break; + } + case Intrinsic::memset: { + Value *Op0 = CI->getArgOperand(0); + Type *IntPtr = DL.getIntPtrType(Op0->getType()); + Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr, + /* isSigned */ false); Value *Ops[3]; - Ops[0] = CI->getOperand(1); + Ops[0] = Op0; // Extend the amount to i32. - Ops[1] = new ZExtInst(CI->getOperand(2), Type::Int32Ty, "", CI); + Ops[1] = Builder.CreateIntCast(CI->getArgOperand(1), + Type::getInt32Ty(Context), + /* isSigned */ false); Ops[2] = Size; - ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getOperand(1)->getType(), - MemsetFCache); + ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getArgOperand(0)->getType()); + break; + } + case Intrinsic::sqrt: { + ReplaceFPIntrinsicWithCall(CI, "sqrtf", "sqrt", "sqrtl"); + break; + } + case Intrinsic::log: { + ReplaceFPIntrinsicWithCall(CI, "logf", "log", "logl"); + break; + } + case Intrinsic::log2: { + ReplaceFPIntrinsicWithCall(CI, "log2f", "log2", "log2l"); + break; + } + case Intrinsic::log10: { + ReplaceFPIntrinsicWithCall(CI, "log10f", "log10", "log10l"); + break; + } + case Intrinsic::exp: { + ReplaceFPIntrinsicWithCall(CI, "expf", "exp", "expl"); + break; + } + case Intrinsic::exp2: { + ReplaceFPIntrinsicWithCall(CI, "exp2f", "exp2", "exp2l"); + break; + } + case Intrinsic::pow: { + ReplaceFPIntrinsicWithCall(CI, "powf", "pow", "powl"); + break; + } + case Intrinsic::sin: { + ReplaceFPIntrinsicWithCall(CI, "sinf", "sin", "sinl"); + break; + } + case Intrinsic::cos: { + ReplaceFPIntrinsicWithCall(CI, "cosf", "cos", "cosl"); + break; + } + case Intrinsic::floor: { + ReplaceFPIntrinsicWithCall(CI, "floorf", "floor", "floorl"); break; } - case Intrinsic::sqrt_f32: { - static Constant *sqrtfFCache = 0; - ReplaceCallWith("sqrtf", CI, CI->op_begin()+1, CI->op_end(), - Type::FloatTy, sqrtfFCache); + case Intrinsic::ceil: { + ReplaceFPIntrinsicWithCall(CI, "ceilf", "ceil", "ceill"); break; } - case Intrinsic::sqrt_f64: { - static Constant *sqrtFCache = 0; - ReplaceCallWith("sqrt", CI, CI->op_begin()+1, CI->op_end(), - Type::DoubleTy, sqrtFCache); + case Intrinsic::trunc: { + ReplaceFPIntrinsicWithCall(CI, "truncf", "trunc", "truncl"); break; } + case Intrinsic::round: { + ReplaceFPIntrinsicWithCall(CI, "roundf", "round", "roundl"); + break; + } + case Intrinsic::copysign: { + ReplaceFPIntrinsicWithCall(CI, "copysignf", "copysign", "copysignl"); + break; + } + case Intrinsic::flt_rounds: + // Lower to "round to the nearest" + if (!CI->getType()->isVoidTy()) + CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1)); + break; + case Intrinsic::invariant_start: + case Intrinsic::lifetime_start: + // Discard region information. + CI->replaceAllUsesWith(UndefValue::get(CI->getType())); + break; + case Intrinsic::invariant_end: + case Intrinsic::lifetime_end: + // Discard region information. + break; } assert(CI->use_empty() && "Lowering should have eliminated any uses of the intrinsic call!"); CI->eraseFromParent(); } + +bool IntrinsicLowering::LowerToByteSwap(CallInst *CI) { + // Verify this is a simple bswap. + if (CI->getNumArgOperands() != 1 || + CI->getType() != CI->getArgOperand(0)->getType() || + !CI->getType()->isIntegerTy()) + return false; + + IntegerType *Ty = dyn_cast(CI->getType()); + if (!Ty) + return false; + + // Okay, we can do this xform, do so now. + Module *M = CI->getParent()->getParent()->getParent(); + Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Ty); + + Value *Op = CI->getArgOperand(0); + Op = CallInst::Create(Int, Op, CI->getName(), CI); + + CI->replaceAllUsesWith(Op); + CI->eraseFromParent(); + return true; +}