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//===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file exposes an interface to build some C language libcalls for
// optimization passes that need to call the various functions.
//
//===----------------------------------------------------------------------===//
#ifndef TRANSFORMS_UTILS_BUILDLIBCALLS_H
#define TRANSFORMS_UTILS_BUILDLIBCALLS_H
#include "llvm/IRBuilder.h"
namespace llvm {
class Value;
class DataLayout;
class TargetLibraryInfo;
/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
Value *CastToCStr(Value *V, IRBuilder<> &B);
/// EmitStrLen - Emit a call to the strlen function to the builder, for the
/// specified pointer. Ptr is required to be some pointer type, and the
/// return value has 'intptr_t' type.
Value *EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// 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 *EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// 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 *EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// EmitStrNCmp - Emit a call to the strncmp function to the builder.
Value *EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
/// specified pointer arguments.
Value *EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI,
StringRef Name = "strcpy");
/// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the
/// specified pointer arguments and length.
Value *EmitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI,
StringRef Name = "strncpy");
/// 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 *EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// 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 *EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// EmitMemCmp - Emit a call to the memcmp function.
Value *EmitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// 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 *EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
const AttributeSet &Attrs);
/// EmitPutChar - Emit a call to the putchar function. This assumes that Char
/// is an integer.
Value *EmitPutChar(Value *Char, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// EmitPutS - Emit a call to the puts function. This assumes that Str is
/// some pointer.
Value *EmitPutS(Value *Str, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
/// an i32, and File is a pointer to FILE.
Value *EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// EmitFPutS - Emit a call to the puts function. Str is required to be a
/// pointer and File is a pointer to FILE.
Value *EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, const DataLayout *TD,
const TargetLibraryInfo *TLI);
/// 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 *EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
const DataLayout *TD, const TargetLibraryInfo *TLI);
/// SimplifyFortifiedLibCalls - Helper class for folding checked library
/// calls (e.g. __strcpy_chk) into their unchecked counterparts.
class SimplifyFortifiedLibCalls {
protected:
CallInst *CI;
virtual void replaceCall(Value *With) = 0;
virtual bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp,
bool isString) const = 0;
public:
virtual ~SimplifyFortifiedLibCalls();
bool fold(CallInst *CI, const DataLayout *TD, const TargetLibraryInfo *TLI);
};
}
#endif
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