diff --git a/lib/VMCore/IntrinsicLowering.cpp b/lib/VMCore/IntrinsicLowering.cpp deleted file mode 100644 index 6af333e79a5..00000000000 --- a/lib/VMCore/IntrinsicLowering.cpp +++ /dev/null @@ -1,214 +0,0 @@ -//===-- IntrinsicLowering.cpp - Intrinsic Lowering default implementation -===// -// -// 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 implements the default intrinsic lowering implementation. -// -//===----------------------------------------------------------------------===// - -#include "llvm/CodeGen/IntrinsicLowering.h" -#include "llvm/Constants.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Module.h" -#include "llvm/iOther.h" -using namespace llvm; - -template -static Function *EnsureFunctionExists(Module &M, const char *Name, - ArgIt ArgBegin, ArgIt ArgEnd, - const Type *RetTy) { - if (Function *F = M.getNamedFunction(Name)) return F; - // It doesn't already exist in the program, insert a new definition now. - std::vector ParamTys; - for (ArgIt I = ArgBegin; I != ArgEnd; ++I) - ParamTys.push_back(I->getType()); - return M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false)); -} - -/// 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 -/// prototype doesn't match the arguments we expect to pass in. -template -static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI, - ArgIt ArgBegin, ArgIt ArgEnd, - const Type *RetTy, Function *&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(); - FCache = M->getNamedFunction(NewFn); - if (!FCache) { - // It doesn't already exist in the program, insert a new 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)); - } - } - - const FunctionType *FT = FCache->getFunctionType(); - std::vector Operands; - unsigned ArgNo = 0; - for (ArgIt I = ArgBegin; I != ArgEnd && ArgNo != FT->getNumParams(); - ++I, ++ArgNo) { - Value *Arg = *I; - if (Arg->getType() != FT->getParamType(ArgNo)) - Arg = new CastInst(Arg, FT->getParamType(ArgNo), Arg->getName(), CI); - Operands.push_back(Arg); - } - // Pass nulls into any additional arguments... - for (; ArgNo != FT->getNumParams(); ++ArgNo) - Operands.push_back(Constant::getNullValue(FT->getParamType(ArgNo))); - - std::string Name = CI->getName(); CI->setName(""); - if (FT->getReturnType() == Type::VoidTy) Name.clear(); - CallInst *NewCI = new CallInst(FCache, Operands, Name, CI); - if (!CI->use_empty()) { - Value *V = NewCI; - if (CI->getType() != NewCI->getType()) - V = new CastInst(NewCI, CI->getType(), Name, CI); - CI->replaceAllUsesWith(V); - } - return NewCI; -} - -void DefaultIntrinsicLowering::AddPrototypes(Module &M) { - for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) - if (I->isExternal() && !I->use_empty()) - switch (I->getIntrinsicID()) { - default: break; - case Intrinsic::setjmp: - EnsureFunctionExists(M, "setjmp", I->abegin(), I->aend(), Type::IntTy); - break; - case Intrinsic::longjmp: - EnsureFunctionExists(M, "longjmp", I->abegin(), I->aend(),Type::VoidTy); - break; - case Intrinsic::siglongjmp: - EnsureFunctionExists(M, "abort", I->aend(), I->aend(), Type::VoidTy); - break; - case Intrinsic::memcpy: - EnsureFunctionExists(M, "memcpy", I->abegin(), --I->aend(), - I->abegin()->getType()); - break; - case Intrinsic::memmove: - EnsureFunctionExists(M, "memmove", I->abegin(), --I->aend(), - I->abegin()->getType()); - break; - case Intrinsic::memset: - EnsureFunctionExists(M, "memset", I->abegin(), --I->aend(), - I->abegin()->getType()); - break; - case Intrinsic::isunordered: - EnsureFunctionExists(M, "isunordered", I->abegin(), I->aend(), Type::BoolTy); - break; - } - -} - -void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) { - Function *Callee = CI->getCalledFunction(); - assert(Callee && "Cannot lower an indirect call!"); - - switch (Callee->getIntrinsicID()) { - case Intrinsic::not_intrinsic: - std::cerr << "Cannot lower a call to a non-intrinsic function '" - << Callee->getName() << "'!\n"; - abort(); - default: - std::cerr << "Error: Code generator does not support intrinsic function '" - << Callee->getName() << "'!\n"; - abort(); - - // 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 Function *SetjmpFCache = 0; - Value *V = ReplaceCallWith("setjmp", CI, CI->op_begin()+1, CI->op_end(), - Type::IntTy, 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 Function *LongjmpFCache = 0; - ReplaceCallWith("longjmp", CI, CI->op_begin()+1, CI->op_end(), - Type::VoidTy, LongjmpFCache); - break; - } - - case Intrinsic::siglongjmp: { - // Insert the call to abort - static Function *AbortFCache = 0; - ReplaceCallWith("abort", CI, CI->op_end(), CI->op_end(), Type::VoidTy, - AbortFCache); - break; - } - - case Intrinsic::returnaddress: - case Intrinsic::frameaddress: - std::cerr << "WARNING: this target does not support the llvm." - << (Callee->getIntrinsicID() == Intrinsic::returnaddress ? - "return" : "frame") << "address intrinsic.\n"; - CI->replaceAllUsesWith(ConstantPointerNull::get( - cast(CI->getType()))); - break; - - case Intrinsic::dbg_stoppoint: - case Intrinsic::dbg_region_start: - case Intrinsic::dbg_region_end: - case Intrinsic::dbg_declare: - case Intrinsic::dbg_func_start: - if (CI->getType() != Type::VoidTy) - CI->replaceAllUsesWith(Constant::getNullValue(CI->getType())); - break; // Simply strip out debugging intrinsics - - case Intrinsic::memcpy: { - // The memcpy intrinsic take an extra alignment argument that the memcpy - // libc function does not. - static Function *MemcpyFCache = 0; - ReplaceCallWith("memcpy", CI, CI->op_begin()+1, CI->op_end()-1, - (*(CI->op_begin()+1))->getType(), MemcpyFCache); - break; - } - case Intrinsic::memmove: { - // The memmove intrinsic take an extra alignment argument that the memmove - // libc function does not. - static Function *MemmoveFCache = 0; - ReplaceCallWith("memmove", CI, CI->op_begin()+1, CI->op_end()-1, - (*(CI->op_begin()+1))->getType(), MemmoveFCache); - break; - } - case Intrinsic::memset: { - // The memset intrinsic take an extra alignment argument that the memset - // libc function does not. - static Function *MemsetFCache = 0; - ReplaceCallWith("memset", CI, CI->op_begin()+1, CI->op_end()-1, - (*(CI->op_begin()+1))->getType(), MemsetFCache); - break; - } - case Intrinsic::isunordered: { - static Function *isunorderedFCache = 0; - ReplaceCallWith("isunordered", CI, CI->op_begin()+1, CI->op_end(), - Type::BoolTy, isunorderedFCache); - break; - } - } - - assert(CI->use_empty() && - "Lowering should have eliminated any uses of the intrinsic call!"); - CI->getParent()->getInstList().erase(CI); -}