1 //===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file exposes an interface to build some C language libcalls for
11 // optimization passes that need to call the various functions.
13 //===----------------------------------------------------------------------===//
15 #ifndef TRANSFORMS_UTILS_BUILDLIBCALLS_H
16 #define TRANSFORMS_UTILS_BUILDLIBCALLS_H
18 #include "llvm/IRBuilder.h"
23 class TargetLibraryInfo;
25 /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
26 Value *CastToCStr(Value *V, IRBuilder<> &B);
28 /// EmitStrLen - Emit a call to the strlen function to the builder, for the
29 /// specified pointer. Ptr is required to be some pointer type, and the
30 /// return value has 'intptr_t' type.
31 Value *EmitStrLen(Value *Ptr, IRBuilder<> &B, const TargetData *TD,
32 const TargetLibraryInfo *TLI);
34 /// EmitStrChr - Emit a call to the strchr function to the builder, for the
35 /// specified pointer and character. Ptr is required to be some pointer type,
36 /// and the return value has 'i8*' type.
37 Value *EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, const TargetData *TD,
38 const TargetLibraryInfo *TLI);
40 /// EmitStrNCmp - Emit a call to the strncmp function to the builder.
41 Value *EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
42 const TargetData *TD, const TargetLibraryInfo *TLI);
44 /// EmitStrCpy - Emit a call to the strcpy function to the builder, for the
45 /// specified pointer arguments.
46 Value *EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
47 const TargetData *TD, const TargetLibraryInfo *TLI,
48 StringRef Name = "strcpy");
50 /// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the
51 /// specified pointer arguments and length.
52 Value *EmitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
53 const TargetData *TD, const TargetLibraryInfo *TLI,
54 StringRef Name = "strncpy");
56 /// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
57 /// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src
59 Value *EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
60 IRBuilder<> &B, const TargetData *TD,
61 const TargetLibraryInfo *TLI);
63 /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
64 /// a pointer, Val is an i32 value, and Len is an 'intptr_t' value.
65 Value *EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
66 const TargetData *TD, const TargetLibraryInfo *TLI);
68 /// EmitMemCmp - Emit a call to the memcmp function.
69 Value *EmitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
70 const TargetData *TD, const TargetLibraryInfo *TLI);
72 /// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name'
73 /// (e.g. 'floor'). This function is known to take a single of type matching
74 /// 'Op' and returns one value with the same type. If 'Op' is a long double,
75 /// 'l' is added as the suffix of name, if 'Op' is a float, we add a 'f'
77 Value *EmitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
78 const AttrListPtr &Attrs);
80 /// EmitPutChar - Emit a call to the putchar function. This assumes that Char
82 Value *EmitPutChar(Value *Char, IRBuilder<> &B, const TargetData *TD,
83 const TargetLibraryInfo *TLI);
85 /// EmitPutS - Emit a call to the puts function. This assumes that Str is
87 Value *EmitPutS(Value *Str, IRBuilder<> &B, const TargetData *TD,
88 const TargetLibraryInfo *TLI);
90 /// EmitFPutC - Emit a call to the fputc function. This assumes that Char is
91 /// an i32, and File is a pointer to FILE.
92 Value *EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
93 const TargetData *TD, const TargetLibraryInfo *TLI);
95 /// EmitFPutS - Emit a call to the puts function. Str is required to be a
96 /// pointer and File is a pointer to FILE.
97 Value *EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, const TargetData *TD,
98 const TargetLibraryInfo *TLI);
100 /// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is
101 /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
102 Value *EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
103 const TargetData *TD, const TargetLibraryInfo *TLI);
105 /// SimplifyFortifiedLibCalls - Helper class for folding checked library
106 /// calls (e.g. __strcpy_chk) into their unchecked counterparts.
107 class SimplifyFortifiedLibCalls {
110 virtual void replaceCall(Value *With) = 0;
111 virtual bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp,
112 bool isString) const = 0;
114 virtual ~SimplifyFortifiedLibCalls();
115 bool fold(CallInst *CI, const TargetData *TD, const TargetLibraryInfo *TLI);