mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
8d7221ccf5
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207196 91177308-0d34-0410-b5e6-96231b3b80d8
627 lines
26 KiB
C++
627 lines
26 KiB
C++
//===- 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) {
|
|
unsigned AS = V->getType()->getPointerAddressSpace();
|
|
return B.CreateBitCast(V, B.getInt8PtrTy(AS), "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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
ArrayRef<Attribute::AttrKind>(AVs, 2));
|
|
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Constant *StrLen = M->getOrInsertFunction("strlen",
|
|
AttributeSet::get(M->getContext(),
|
|
AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
ArrayRef<Attribute::AttrKind>(AVs, 2));
|
|
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Constant *StrNLen = M->getOrInsertFunction("strnlen",
|
|
AttributeSet::get(M->getContext(),
|
|
AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AttributeSet AS =
|
|
AttributeSet::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(),
|
|
AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[3];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
ArrayRef<Attribute::AttrKind>(AVs, 2));
|
|
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *StrNCmp = M->getOrInsertFunction("strncmp",
|
|
AttributeSet::get(M->getContext(),
|
|
AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
Type *I8Ptr = B.getInt8PtrTy();
|
|
Value *StrCpy = M->getOrInsertFunction(Name,
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
Type *I8Ptr = B.getInt8PtrTy();
|
|
Value *StrNCpy = M->getOrInsertFunction(Name,
|
|
AttributeSet::get(M->getContext(),
|
|
AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS;
|
|
AS = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemCpy = M->getOrInsertFunction("__memcpy_chk",
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS;
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AS = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
ArrayRef<Attribute::AttrKind>(AVs, 2));
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemChr = M->getOrInsertFunction("memchr",
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[3];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
|
|
AS[2] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
ArrayRef<Attribute::AttrKind>(AVs, 2));
|
|
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemCmp = M->getOrInsertFunction("memcmp",
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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;
|
|
}
|
|
|
|
/// Append a suffix to the function name according to the type of 'Op'.
|
|
static void AppendTypeSuffix(Value *Op, StringRef &Name, SmallString<20> &NameBuffer) {
|
|
if (!Op->getType()->isDoubleTy()) {
|
|
NameBuffer += Name;
|
|
|
|
if (Op->getType()->isFloatTy())
|
|
NameBuffer += 'f';
|
|
else
|
|
NameBuffer += 'l';
|
|
|
|
Name = NameBuffer;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/// 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;
|
|
AppendTypeSuffix(Op, 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;
|
|
}
|
|
|
|
/// EmitBinaryFloatFnCall - Emit a call to the binary function named 'Name'
|
|
/// (e.g. 'fmin'). This function is known to take type matching 'Op1' and 'Op2'
|
|
/// and return one value with the same type. If 'Op1/Op2' are long double, 'l'
|
|
/// is added as the suffix of name, if 'Op1/Op2' is a float, we add a 'f'
|
|
/// suffix.
|
|
Value *llvm::EmitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
|
|
IRBuilder<> &B, const AttributeSet &Attrs) {
|
|
SmallString<20> NameBuffer;
|
|
AppendTypeSuffix(Op1, Name, NameBuffer);
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
Value *Callee = M->getOrInsertFunction(Name, Op1->getType(),
|
|
Op1->getType(), Op2->getType(), NULL);
|
|
CallInst *CI = B.CreateCall2(Callee, Op1, Op2, 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 nullptr;
|
|
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
|
|
Value *PutS = M->getOrInsertFunction("puts",
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[2];
|
|
AS[0] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
Constant *F;
|
|
if (File->getType()->isPointerTy())
|
|
F = M->getOrInsertFunction("fputc",
|
|
AttributeSet::get(M->getContext(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[3];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), 2, Attribute::NoCapture);
|
|
AS[2] = AttributeSet::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(), AS),
|
|
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 nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getParent()->getParent();
|
|
AttributeSet AS[3];
|
|
AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
|
|
AS[1] = AttributeSet::get(M->getContext(), 4, Attribute::NoCapture);
|
|
AS[2] = AttributeSet::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(), AS),
|
|
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;
|
|
}
|