1 //===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file exposes an interface to build some C language libcalls for 11 // optimization passes that need to call the various functions. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef TRANSFORMS_UTILS_BUILDLIBCALLS_H 16 #define TRANSFORMS_UTILS_BUILDLIBCALLS_H 17 18 #include "llvm/Support/IRBuilder.h" 19 20 namespace llvm { 21 class Value; 22 class TargetData; 23 24 /// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*. 25 Value *CastToCStr(Value *V, IRBuilder<> &B); 26 27 /// EmitStrLen - Emit a call to the strlen function to the builder, for the 28 /// specified pointer. Ptr is required to be some pointer type, and the 29 /// return value has 'intptr_t' type. 30 Value *EmitStrLen(Value *Ptr, IRBuilder<> &B, const TargetData *TD); 31 32 /// EmitStrChr - Emit a call to the strchr function to the builder, for the 33 /// specified pointer and character. Ptr is required to be some pointer type, 34 /// and the return value has 'i8*' type. 35 Value *EmitStrChr(Value *Ptr, char C, IRBuilder<> &B, const TargetData *TD); 36 37 /// EmitStrNCmp - Emit a call to the strncmp function to the builder. 38 Value *EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, 39 const TargetData *TD); 40 41 /// EmitStrCpy - Emit a call to the strcpy function to the builder, for the 42 /// specified pointer arguments. 43 Value *EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B, 44 const TargetData *TD, StringRef Name = "strcpy"); 45 46 /// EmitStrNCpy - Emit a call to the strncpy function to the builder, for the 47 /// specified pointer arguments and length. 48 Value *EmitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B, 49 const TargetData *TD, StringRef Name = "strncpy"); 50 51 /// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder. 52 /// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src 53 /// are pointers. 54 Value *EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, 55 IRBuilder<> &B, const TargetData *TD); 56 57 /// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is 58 /// a pointer, Val is an i32 value, and Len is an 'intptr_t' value. 59 Value *EmitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B, 60 const TargetData *TD); 61 62 /// EmitMemCmp - Emit a call to the memcmp function. 63 Value *EmitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, 64 const TargetData *TD); 65 66 /// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' 67 /// (e.g. 'floor'). This function is known to take a single of type matching 68 /// 'Op' and returns one value with the same type. If 'Op' is a long double, 69 /// 'l' is added as the suffix of name, if 'Op' is a float, we add a 'f' 70 /// suffix. 71 Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B, 72 const AttrListPtr &Attrs); 73 74 /// EmitPutChar - Emit a call to the putchar function. This assumes that Char 75 /// is an integer. 76 Value *EmitPutChar(Value *Char, IRBuilder<> &B, const TargetData *TD); 77 78 /// EmitPutS - Emit a call to the puts function. This assumes that Str is 79 /// some pointer. 80 void EmitPutS(Value *Str, IRBuilder<> &B, const TargetData *TD); 81 82 /// EmitFPutC - Emit a call to the fputc function. This assumes that Char is 83 /// an i32, and File is a pointer to FILE. 84 void EmitFPutC(Value *Char, Value *File, IRBuilder<> &B, 85 const TargetData *TD); 86 87 /// EmitFPutS - Emit a call to the puts function. Str is required to be a 88 /// pointer and File is a pointer to FILE. 89 void EmitFPutS(Value *Str, Value *File, IRBuilder<> &B, const TargetData *TD); 90 91 /// EmitFWrite - Emit a call to the fwrite function. This assumes that Ptr is 92 /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE. 93 void EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B, 94 const TargetData *TD); 95 96 /// SimplifyFortifiedLibCalls - Helper class for folding checked library 97 /// calls (e.g. __strcpy_chk) into their unchecked counterparts. 98 class SimplifyFortifiedLibCalls { 99 protected: 100 CallInst *CI; 101 virtual void replaceCall(Value *With) = 0; 102 virtual bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp, 103 bool isString) const = 0; 104 public: 105 virtual ~SimplifyFortifiedLibCalls(); 106 bool fold(CallInst *CI, const TargetData *TD); 107 }; 108 } 109 110 #endif 111
