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1f243e9f43
llvm-6502/lib/CodeGen/IntrinsicLowering.cpp
Chris Lattner 1f243e9f43 Wrap long lines. Fix "warning: conflicting types for built-in function 'memset'" 
warning from the CBE+GCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21779 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-08 19:46:29 +00:00

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//===-- 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/Instructions.h"
#include "llvm/Type.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
/// prototype doesn't match the arguments we expect to pass in.
template <class ArgIt>
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<const Type *> 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<Value*> 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->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:
M.getOrInsertFunction("memset", PointerType::get(Type::SByteTy),
PointerType::get(Type::SByteTy),
Type::IntTy, (--(--I->arg_end()))->getType(), 0);
break;
case Intrinsic::isunordered:
EnsureFunctionExists(M, "isunordered", I->arg_begin(), I->arg_end(),
Type::BoolTy);
break;
case Intrinsic::sqrt:
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);
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::ctpop: {
Value *Src = CI->getOperand(1);
switch (CI->getOperand(0)->getType()->getTypeID())
{
case Type::SByteTyID:
case Type::UByteTyID:
{
Value* SA = ConstantUInt::get(Type::UByteTy, 1);
Value* MA = ConstantUInt::get(Type::UIntTy, 0x55);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 2);
MA = ConstantUInt::get(Type::UIntTy, 0x33);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 4);
MA = ConstantUInt::get(Type::UIntTy, 0x0F);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA), "ctpop");
}
break;
case Type::ShortTyID:
case Type::UShortTyID:
{
Value* SA = ConstantUInt::get(Type::UByteTy, 1);
Value* MA = ConstantUInt::get(Type::UIntTy, 0x5555);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 2);
MA = ConstantUInt::get(Type::UIntTy, 0x3333);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 4);
MA = ConstantUInt::get(Type::UIntTy, 0x0F0F);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 8);
MA = ConstantUInt::get(Type::UIntTy, 0x00FF);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA), "ctpop");
}
break;
case Type::IntTyID:
case Type::UIntTyID:
{
Value* SA = ConstantUInt::get(Type::UByteTy, 1);
Value* MA = ConstantUInt::get(Type::UIntTy, 0x55555555);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 2);
MA = ConstantUInt::get(Type::UIntTy, 0x33333333);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 4);
MA = ConstantUInt::get(Type::UIntTy, 0x0F0F0F0F);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 8);
MA = ConstantUInt::get(Type::UIntTy, 0x00FF00FF);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 8);
MA = ConstantUInt::get(Type::UIntTy, 0x0000FFFF);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA), "ctpop");
}
break;
case Type::LongTyID:
case Type::ULongTyID:
{
Value* SA = ConstantUInt::get(Type::UByteTy, 1);
Value* MA = ConstantUInt::get(Type::ULongTy, 0x5555555555555555ULL);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 2);
MA = ConstantUInt::get(Type::ULongTy, 0x3333333333333333ULL);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 4);
MA = ConstantUInt::get(Type::ULongTy, 0x0F0F0F0F0F0F0F0FULL);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 8);
MA = ConstantUInt::get(Type::ULongTy, 0x00FF00FF00FF00FFULL);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA));
SA = ConstantUInt::get(Type::UByteTy, 16);
MA = ConstantUInt::get(Type::ULongTy, 0x00000000FFFFFFFFULL);
Src = BinaryOperator::create(Instruction::Add,
BinaryOperator::create(Instruction::And, Src, MA),
BinaryOperator::create(Instruction::And,
new ShiftInst(Instruction::Shr, Src, SA),
MA), "ctpop");
}
break;
default:
abort();
}
CI->replaceAllUsesWith(Src);
break;
}
case Intrinsic::ctlz: {
Value *Src = CI->getOperand(1);
Value* SA;
switch (CI->getOperand(0)->getType()->getTypeID())
{
case Type::LongTyID:
case Type::ULongTyID:
SA = ConstantUInt::get(Type::UByteTy, 32);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
case Type::IntTyID:
case Type::UIntTyID:
SA = ConstantUInt::get(Type::UByteTy, 16);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
case Type::ShortTyID:
case Type::UShortTyID:
SA = ConstantUInt::get(Type::UByteTy, 8);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
default:
SA = ConstantUInt::get(Type::UByteTy, 1);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
SA = ConstantUInt::get(Type::UByteTy, 2);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
SA = ConstantUInt::get(Type::UByteTy, 4);
Src = BinaryOperator::create(Instruction::Or, Src, new ShiftInst(Instruction::Shr, Src, SA));
};
Src = BinaryOperator::createNot(Src);
Src = new CallInst(new Function(CI->getCalledFunction()->getFunctionType(),
CI->getCalledFunction()->getLinkage(),
"llvm.ctpop"), Src);
CI->replaceAllUsesWith(Src);
break;
}
case Intrinsic::cttz: {
Value *Src = CI->getOperand(1);
Src = BinaryOperator::create(Instruction::And, BinaryOperator::createNot(Src),
BinaryOperator::create(Instruction::Sub, Src,
ConstantUInt::get(CI->getOperand(0)->getType(), 1)));
Src = new CallInst(new Function(CI->getCalledFunction()->getFunctionType(),
CI->getCalledFunction()->getLinkage(),
"llvm.ctpop"), Src);
CI->replaceAllUsesWith(Src);
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<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:
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: {
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;
}
case Intrinsic::sqrt: {
static Function *sqrtFCache = 0;
static Function *sqrtfFCache = 0;
if(CI->getType() == Type::FloatTy)
ReplaceCallWith("sqrtf", CI, CI->op_begin()+1, CI->op_end(),
Type::FloatTy, sqrtfFCache);
else
ReplaceCallWith("sqrt", CI, CI->op_begin()+1, CI->op_end(),
Type::DoubleTy, sqrtFCache);
break;
}
}
assert(CI->use_empty() &&
"Lowering should have eliminated any uses of the intrinsic call!");
CI->getParent()->getInstList().erase(CI);
}
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