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llvm-6502/lib/Transforms/Utils/BuildLibCalls.cpp
Chandler Carruth 0b8c9a80f2 Move all of the header files which are involved in modelling the LLVM IR 
into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.

There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.

The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.

I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).

I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02 11:36:10 +00:00

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//===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements some functions that will create standard C libcalls.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/BuildLibCalls.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/Target/TargetLibraryInfo.h"
using namespace llvm;
/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
Value *llvm::CastToCStr(Value *V, IRBuilder<> &B) {
return B.CreateBitCast(V, B.getInt8PtrTy(), "cstr");
}
/// EmitStrLen - Emit a call to the strlen function to the builder, for the
/// specified pointer. This always returns an integer value of size intptr_t.
Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::strlen))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
LLVMContext &Context = B.GetInsertBlock()->getContext();
Constant *StrLen = M->getOrInsertFunction("strlen",
AttributeSet::get(M->getContext(),
AWI),
TD->getIntPtrType(Context),
B.getInt8PtrTy(),
NULL);
CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen");
if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitStrNLen - Emit a call to the strnlen function to the builder, for the
/// specified pointer. Ptr is required to be some pointer type, MaxLen must
/// be of size_t type, and the return value has 'intptr_t' type.
Value *llvm::EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::strnlen))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
LLVMContext &Context = B.GetInsertBlock()->getContext();
Constant *StrNLen = M->getOrInsertFunction("strnlen",
AttributeSet::get(M->getContext(),
AWI),
TD->getIntPtrType(Context),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
NULL);
CallInst *CI = B.CreateCall2(StrNLen, CastToCStr(Ptr, B), MaxLen, "strnlen");
if (const Function *F = dyn_cast<Function>(StrNLen->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitStrChr - Emit a call to the strchr function to the builder, for the
/// specified pointer and character. Ptr is required to be some pointer type,
/// and the return value has 'i8*' type.
Value *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::strchr))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AttributeWithIndex AWI =
AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
Type *I8Ptr = B.getInt8PtrTy();
Type *I32Ty = B.getInt32Ty();
Constant *StrChr = M->getOrInsertFunction("strchr",
AttributeSet::get(M->getContext(),
AWI),
I8Ptr, I8Ptr, I32Ty, NULL);
CallInst *CI = B.CreateCall2(StrChr, CastToCStr(Ptr, B),
ConstantInt::get(I32Ty, C), "strchr");
if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitStrNCmp - Emit a call to the strncmp function to the builder.
Value *llvm::EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len,
IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::strncmp))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AWI[2] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
LLVMContext &Context = B.GetInsertBlock()->getContext();
Value *StrNCmp = M->getOrInsertFunction("strncmp",
AttributeSet::get(M->getContext(),
AWI),
B.getInt32Ty(),
B.getInt8PtrTy(),
B.getInt8PtrTy(),
TD->getIntPtrType(Context), NULL);
CallInst *CI = B.CreateCall3(StrNCmp, CastToCStr(Ptr1, B),
CastToCStr(Ptr2, B), Len, "strncmp");
if (const Function *F = dyn_cast<Function>(StrNCmp->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
/// specified pointer arguments.
Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI,
StringRef Name) {
if (!TLI->has(LibFunc::strcpy))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
Type *I8Ptr = B.getInt8PtrTy();
Value *StrCpy = M->getOrInsertFunction(Name,
AttributeSet::get(M->getContext(), AWI),
I8Ptr, I8Ptr, I8Ptr, NULL);
CallInst *CI = B.CreateCall2(StrCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
Name);
if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the
/// specified pointer arguments.
Value *llvm::EmitStrNCpy(Value *Dst, Value *Src, Value *Len,
IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI, StringRef Name) {
if (!TLI->has(LibFunc::strncpy))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
Type *I8Ptr = B.getInt8PtrTy();
Value *StrNCpy = M->getOrInsertFunction(Name,
AttributeSet::get(M->getContext(),
AWI),
I8Ptr, I8Ptr, I8Ptr,
Len->getType(), NULL);
CallInst *CI = B.CreateCall3(StrNCpy, CastToCStr(Dst, B), CastToCStr(Src, B),
Len, "strncpy");
if (const Function *F = dyn_cast<Function>(StrNCpy->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
/// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src
/// are pointers.
Value *llvm::EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::memcpy_chk))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI;
AWI = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
LLVMContext &Context = B.GetInsertBlock()->getContext();
Value *MemCpy = M->getOrInsertFunction("__memcpy_chk",
AttributeSet::get(M->getContext(), AWI),
B.getInt8PtrTy(),
B.getInt8PtrTy(),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
TD->getIntPtrType(Context), NULL);
Dst = CastToCStr(Dst, B);
Src = CastToCStr(Src, B);
CallInst *CI = B.CreateCall4(MemCpy, Dst, Src, Len, ObjSize);
if (const Function *F = dyn_cast<Function>(MemCpy->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
/// a pointer, Val is an i32 value, and Len is an 'intptr_t' value.
Value *llvm::EmitMemChr(Value *Ptr, Value *Val,
Value *Len, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::memchr))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI;
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AWI = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
LLVMContext &Context = B.GetInsertBlock()->getContext();
Value *MemChr = M->getOrInsertFunction("memchr",
AttributeSet::get(M->getContext(), AWI),
B.getInt8PtrTy(),
B.getInt8PtrTy(),
B.getInt32Ty(),
TD->getIntPtrType(Context),
NULL);
CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr");
if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitMemCmp - Emit a call to the memcmp function.
Value *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2,
Value *Len, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::memcmp))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
AWI[2] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
ArrayRef<Attribute::AttrKind>(AVs, 2));
LLVMContext &Context = B.GetInsertBlock()->getContext();
Value *MemCmp = M->getOrInsertFunction("memcmp",
AttributeSet::get(M->getContext(), AWI),
B.getInt32Ty(),
B.getInt8PtrTy(),
B.getInt8PtrTy(),
TD->getIntPtrType(Context), NULL);
CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B),
Len, "memcmp");
if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g.
/// 'floor'). This function is known to take a single of type matching 'Op' and
/// returns one value with the same type. If 'Op' is a long double, 'l' is
/// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix.
Value *llvm::EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
const AttributeSet &Attrs) {
SmallString<20> NameBuffer;
if (!Op->getType()->isDoubleTy()) {
// If we need to add a suffix, copy into NameBuffer.
NameBuffer += Name;
if (Op->getType()->isFloatTy())
NameBuffer += 'f'; // floorf
else
NameBuffer += 'l'; // floorl
Name = NameBuffer;
}
Module *M = B.GetInsertBlock()->getParent()->getParent();
Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
Op->getType(), NULL);
CallInst *CI = B.CreateCall(Callee, Op, Name);
CI->setAttributes(Attrs);
if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitPutChar - Emit a call to the putchar function. This assumes that Char
/// is an integer.
Value *llvm::EmitPutChar(Value *Char, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::putchar))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(),
B.getInt32Ty(), NULL);
CallInst *CI = B.CreateCall(PutChar,
B.CreateIntCast(Char,
B.getInt32Ty(),
/*isSigned*/true,
"chari"),
"putchar");
if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitPutS - Emit a call to the puts function. This assumes that Str is
/// some pointer.
Value *llvm::EmitPutS(Value *Str, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::puts))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
Value *PutS = M->getOrInsertFunction("puts",
AttributeSet::get(M->getContext(), AWI),
B.getInt32Ty(),
B.getInt8PtrTy(),
NULL);
CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts");
if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
/// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
/// an integer and File is a pointer to FILE.
Value *llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::fputc))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[2];
AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
Constant *F;
if (File->getType()->isPointerTy())
F = M->getOrInsertFunction("fputc",
AttributeSet::get(M->getContext(), AWI),
B.getInt32Ty(),
B.getInt32Ty(), File->getType(),
NULL);
else
F = M->getOrInsertFunction("fputc",
B.getInt32Ty(),
B.getInt32Ty(),
File->getType(), NULL);
Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true,
"chari");
CallInst *CI = B.CreateCall2(F, Char, File, "fputc");
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
/// EmitFPutS - Emit a call to the puts function. Str is required to be a
/// pointer and File is a pointer to FILE.
Value *llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::fputs))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attribute::NoCapture);
AWI[2] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
StringRef FPutsName = TLI->getName(LibFunc::fputs);
Constant *F;
if (File->getType()->isPointerTy())
F = M->getOrInsertFunction(FPutsName,
AttributeSet::get(M->getContext(), AWI),
B.getInt32Ty(),
B.getInt8PtrTy(),
File->getType(), NULL);
else
F = M->getOrInsertFunction(FPutsName, B.getInt32Ty(),
B.getInt8PtrTy(),
File->getType(), NULL);
CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
/// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is
/// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
Value *llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File,
IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc::fwrite))
return 0;
Module *M = B.GetInsertBlock()->getParent()->getParent();
AttributeWithIndex AWI[3];
AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attribute::NoCapture);
AWI[1] = AttributeWithIndex::get(M->getContext(), 4, Attribute::NoCapture);
AWI[2] = AttributeWithIndex::get(M->getContext(), AttributeSet::FunctionIndex,
Attribute::NoUnwind);
LLVMContext &Context = B.GetInsertBlock()->getContext();
StringRef FWriteName = TLI->getName(LibFunc::fwrite);
Constant *F;
if (File->getType()->isPointerTy())
F = M->getOrInsertFunction(FWriteName,
AttributeSet::get(M->getContext(), AWI),
TD->getIntPtrType(Context),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
TD->getIntPtrType(Context),
File->getType(), NULL);
else
F = M->getOrInsertFunction(FWriteName, TD->getIntPtrType(Context),
B.getInt8PtrTy(),
TD->getIntPtrType(Context),
TD->getIntPtrType(Context),
File->getType(), NULL);
CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size,
ConstantInt::get(TD->getIntPtrType(Context), 1), File);
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
SimplifyFortifiedLibCalls::~SimplifyFortifiedLibCalls() { }
bool SimplifyFortifiedLibCalls::fold(CallInst *CI, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
// We really need DataLayout for later.
if (!TD) return false;
this->CI = CI;
Function *Callee = CI->getCalledFunction();
StringRef Name = Callee->getName();
FunctionType *FT = Callee->getFunctionType();
LLVMContext &Context = CI->getParent()->getContext();
IRBuilder<> B(CI);
if (Name == "__memcpy_chk") {
// Check if this has the right signature.
if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
!FT->getParamType(0)->isPointerTy() ||
!FT->getParamType(1)->isPointerTy() ||
FT->getParamType(2) != TD->getIntPtrType(Context) ||
FT->getParamType(3) != TD->getIntPtrType(Context))
return false;
if (isFoldable(3, 2, false)) {
B.CreateMemCpy(CI->getArgOperand(0), CI->getArgOperand(1),
CI->getArgOperand(2), 1);
replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
// Should be similar to memcpy.
if (Name == "__mempcpy_chk") {
return false;
}
if (Name == "__memmove_chk") {
// Check if this has the right signature.
if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
!FT->getParamType(0)->isPointerTy() ||
!FT->getParamType(1)->isPointerTy() ||
FT->getParamType(2) != TD->getIntPtrType(Context) ||
FT->getParamType(3) != TD->getIntPtrType(Context))
return false;
if (isFoldable(3, 2, false)) {
B.CreateMemMove(CI->getArgOperand(0), CI->getArgOperand(1),
CI->getArgOperand(2), 1);
replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
if (Name == "__memset_chk") {
// Check if this has the right signature.
if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
!FT->getParamType(0)->isPointerTy() ||
!FT->getParamType(1)->isIntegerTy() ||
FT->getParamType(2) != TD->getIntPtrType(Context) ||
FT->getParamType(3) != TD->getIntPtrType(Context))
return false;
if (isFoldable(3, 2, false)) {
Value *Val = B.CreateIntCast(CI->getArgOperand(1), B.getInt8Ty(),
false);
B.CreateMemSet(CI->getArgOperand(0), Val, CI->getArgOperand(2), 1);
replaceCall(CI->getArgOperand(0));
return true;
}
return false;
}
if (Name == "__strcpy_chk" || Name == "__stpcpy_chk") {
// Check if this has the right signature.
if (FT->getNumParams() != 3 ||
FT->getReturnType() != FT->getParamType(0) ||
FT->getParamType(0) != FT->getParamType(1) ||
FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
FT->getParamType(2) != TD->getIntPtrType(Context))
return 0;
// If a) we don't have any length information, or b) we know this will
// fit then just lower to a plain st[rp]cpy. Otherwise we'll keep our
// st[rp]cpy_chk call which may fail at runtime if the size is too long.
// TODO: It might be nice to get a maximum length out of the possible
// string lengths for varying.
if (isFoldable(2, 1, true)) {
Value *Ret = EmitStrCpy(CI->getArgOperand(0), CI->getArgOperand(1), B, TD,
TLI, Name.substr(2, 6));
if (!Ret)
return false;
replaceCall(Ret);
return true;
}
return false;
}
if (Name == "__strncpy_chk" || Name == "__stpncpy_chk") {
// Check if this has the right signature.
if (FT->getNumParams() != 4 || FT->getReturnType() != FT->getParamType(0) ||
FT->getParamType(0) != FT->getParamType(1) ||
FT->getParamType(0) != Type::getInt8PtrTy(Context) ||
!FT->getParamType(2)->isIntegerTy() ||
FT->getParamType(3) != TD->getIntPtrType(Context))
return false;
if (isFoldable(3, 2, false)) {
Value *Ret = EmitStrNCpy(CI->getArgOperand(0), CI->getArgOperand(1),
CI->getArgOperand(2), B, TD, TLI,
Name.substr(2, 7));
if (!Ret)
return false;
replaceCall(Ret);
return true;
}
return false;
}
if (Name == "__strcat_chk") {
return false;
}
if (Name == "__strncat_chk") {
return false;
}
return false;
}
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