//===-- 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/IntrinsicLowering.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
-#include "llvm/iOther.h"
+#include "llvm/Instructions.h"
+#include <iostream>
+
using namespace llvm;
+template <class ArgIt>
+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<const Type *> 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
FCache = M->getOrInsertFunction(NewFn,
FunctionType::get(RetTy, ParamTys, false));
}
- }
+ }
const FunctionType *FT = FCache->getFunctionType();
std::vector<Value*> Operands;
std::string Name = CI->getName(); CI->setName("");
if (FT->getReturnType() == Type::VoidTy) Name.clear();
- return new CallInst(FCache, Operands, Name, CI);
+ 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->arg_begin(), I->arg_end(), Type::IntTy);
+ 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:
+ EnsureFunctionExists(M, "memcpy", I->arg_begin(), --I->arg_end(),
+ I->arg_begin()->getType());
+ break;
+ case Intrinsic::memmove:
+ EnsureFunctionExists(M, "memmove", I->arg_begin(), --I->arg_end(),
+ I->arg_begin()->getType());
+ break;
+ case Intrinsic::memset:
+ EnsureFunctionExists(M, "memset", I->arg_begin(), --I->arg_end(),
+ I->arg_begin()->getType());
+ break;
+ case Intrinsic::isunordered:
+ EnsureFunctionExists(M, "isunordered", I->arg_begin(), I->arg_end(), Type::BoolTy);
+ break;
+ }
+
+}
void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
Function *Callee = CI->getCalledFunction();
assert(Callee && "Cannot lower an indirect call!");
-
- Module *M = Callee->getParent();
switch (Callee->getIntrinsicID()) {
case Intrinsic::not_intrinsic:
CI->replaceAllUsesWith(V);
break;
}
- case Intrinsic::sigsetjmp:
+ case Intrinsic::sigsetjmp:
if (CI->getType() != Type::VoidTy)
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break;
- case Intrinsic::longjmp:
+ case Intrinsic::longjmp: {
static Function *LongjmpFCache = 0;
ReplaceCallWith("longjmp", CI, CI->op_begin()+1, CI->op_end(),
Type::VoidTy, LongjmpFCache);
break;
+ }
- case Intrinsic::siglongjmp:
+ 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 ?
+ << (Callee->getIntrinsicID() == Intrinsic::returnaddress ?
"return" : "frame") << "address intrinsic.\n";
CI->replaceAllUsesWith(ConstantPointerNull::get(
cast<PointerType>(CI->getType())));
break;
+ case Intrinsic::prefetch:
+ break; // Simply strip out prefetches on unsupported architectures
+
+ case Intrinsic::pcmarker:
+ break; // Simply strip out pcmarker on unsupported architectures
+
case Intrinsic::dbg_stoppoint:
case Intrinsic::dbg_region_start:
case Intrinsic::dbg_region_end:
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break; // Simply strip out debugging intrinsics
- case Intrinsic::memcpy:
+ 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:
+ }
+ 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:
+ }
+ case Intrinsic::memset: {
// The memset intrinsic take an extra alignment argument that the memset
// libc function does not.
static Function *MemsetFCache = 0;
(*(CI->op_begin()+1))->getType(), MemsetFCache);
break;
}
-
+ case Intrinsic::isunordered: {
+ Value *L = CI->getOperand(1);
+ Value *R = CI->getOperand(2);
+
+ Value *LIsNan = new SetCondInst(Instruction::SetNE, L, L, "LIsNan", CI);
+ Value *RIsNan = new SetCondInst(Instruction::SetNE, R, R, "RIsNan", CI);
+ CI->replaceAllUsesWith(
+ BinaryOperator::create(Instruction::Or, LIsNan, RIsNan,
+ "isunordered", CI));
+ break;
+ }
+ }
+
assert(CI->use_empty() &&
"Lowering should have eliminated any uses of the intrinsic call!");
CI->getParent()->getInstList().erase(CI);
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