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111 lines
4.7 KiB
C++
111 lines
4.7 KiB
C++
//===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file exposes an interface to build some C language libcalls for
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// optimization passes that need to call the various functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TRANSFORMS_UTILS_BUILDLIBCALLS_H
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#define TRANSFORMS_UTILS_BUILDLIBCALLS_H
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#include "llvm/Support/IRBuilder.h"
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namespace llvm {
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class Value;
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class TargetData;
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/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
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Value *CastToCStr(Value *V, IRBuilder<> &B);
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/// EmitStrLen - Emit a call to the strlen function to the builder, for the
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/// specified pointer. Ptr is required to be some pointer type, and the
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/// return value has 'intptr_t' type.
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Value *EmitStrLen(Value *Ptr, IRBuilder<> &B, const TargetData *TD);
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/// EmitStrChr - Emit a call to the strchr function to the builder, for the
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/// specified pointer and character. Ptr is required to be some pointer type,
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/// and the return value has 'i8*' type.
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Value *EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, const TargetData *TD);
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/// EmitStrNCmp - Emit a call to the strncmp function to the builder.
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Value *EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
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const TargetData *TD);
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/// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
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/// specified pointer arguments.
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Value *EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
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const TargetData *TD, StringRef Name = "strcpy");
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/// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the
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/// specified pointer arguments and length.
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Value *EmitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
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const TargetData *TD, StringRef Name = "strncpy");
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/// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
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/// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src
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/// are pointers.
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Value *EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
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IRBuilder<> &B, const TargetData *TD);
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/// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
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/// a pointer, Val is an i32 value, and Len is an 'intptr_t' value.
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Value *EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
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const TargetData *TD);
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/// EmitMemCmp - Emit a call to the memcmp function.
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Value *EmitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
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const TargetData *TD);
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/// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name'
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/// (e.g. 'floor'). This function is known to take a single of type matching
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/// 'Op' and returns one value with the same type. If 'Op' is a long double,
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/// 'l' is added as the suffix of name, if 'Op' is a float, we add a 'f'
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/// suffix.
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Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B,
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const AttrListPtr &Attrs);
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/// EmitPutChar - Emit a call to the putchar function. This assumes that Char
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/// is an integer.
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Value *EmitPutChar(Value *Char, IRBuilder<> &B, const TargetData *TD);
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/// EmitPutS - Emit a call to the puts function. This assumes that Str is
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/// some pointer.
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void EmitPutS(Value *Str, IRBuilder<> &B, const TargetData *TD);
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/// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
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/// an i32, and File is a pointer to FILE.
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void EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
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const TargetData *TD);
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/// EmitFPutS - Emit a call to the puts function. Str is required to be a
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/// pointer and File is a pointer to FILE.
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void EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, const TargetData *TD);
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/// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is
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/// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
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void EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
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const TargetData *TD);
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/// SimplifyFortifiedLibCalls - Helper class for folding checked library
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/// calls (e.g. __strcpy_chk) into their unchecked counterparts.
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class SimplifyFortifiedLibCalls {
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protected:
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CallInst *CI;
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virtual void replaceCall(Value *With) = 0;
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virtual bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp,
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bool isString) const = 0;
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public:
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virtual ~SimplifyFortifiedLibCalls();
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bool fold(CallInst *CI, const TargetData *TD);
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};
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}
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#endif
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