include/llvm/Transforms/Utils/BuildLibCalls.h

   1 //===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file exposes an interface to build some C language libcalls for
  10 // optimization passes that need to call the various functions.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
  15 #define LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
  16
  17 #include "llvm/Analysis/TargetLibraryInfo.h"
  18 #include "llvm/IR/IRBuilder.h"
  19
  20 namespace llvm {
  21   class Value;
  22   class DataLayout;
  23   class TargetLibraryInfo;
  24
  25   /// Analyze the name and prototype of the given function and set any
  26   /// applicable attributes.
  27   /// If the library function is unavailable, this doesn't modify it.
  28   ///
  29   /// Returns true if any attributes were set and false otherwise.
  30   bool inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI);
  31   bool inferLibFuncAttributes(Module *M, StringRef Name, const TargetLibraryInfo &TLI);
  32
  33   /// Check whether the overloaded unary floating point function
  34   /// corresponding to \a Ty is available.
  35   bool hasUnaryFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
  36                        LibFunc DoubleFn, LibFunc FloatFn,
  37                        LibFunc LongDoubleFn);
  38
  39   /// Get the name of the overloaded unary floating point function
  40   /// corresponding to \a Ty.
  41   StringRef getUnaryFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
  42                             LibFunc DoubleFn, LibFunc FloatFn,
  43                             LibFunc LongDoubleFn);
  44
  45   /// Return V if it is an i8*, otherwise cast it to i8*.
  46   Value *castToCStr(Value *V, IRBuilder<> &B);
  47
  48   /// Emit a call to the strlen function to the builder, for the specified
  49   /// pointer. Ptr is required to be some pointer type, and the return value has
  50   /// 'intptr_t' type.
  51   Value *emitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL,
  52                     const TargetLibraryInfo *TLI);
  53
  54   /// Emit a call to the strnlen function to the builder, for the specified
  55   /// pointer. Ptr is required to be some pointer type, MaxLen must be of size_t
  56   /// type, and the return value has 'intptr_t' type.
  57   Value *emitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
  58                      const DataLayout &DL, const TargetLibraryInfo *TLI);
  59
  60   /// Emit a call to the strchr function to the builder, for the specified
  61   /// pointer and character. Ptr is required to be some pointer type, and the
  62   /// return value has 'i8*' type.
  63   Value *emitStrChr(Value *Ptr, char C, IRBuilder<> &B,
  64                     const TargetLibraryInfo *TLI);
  65
  66   /// Emit a call to the strncmp function to the builder.
  67   Value *emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
  68                      const DataLayout &DL, const TargetLibraryInfo *TLI);
  69
  70   /// Emit a call to the strcpy function to the builder, for the specified
  71   /// pointer arguments.
  72   Value *emitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
  73                     const TargetLibraryInfo *TLI, StringRef Name = "strcpy");
  74
  75   /// Emit a call to the strncpy function to the builder, for the specified
  76   /// pointer arguments and length.
  77   Value *emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
  78                      const TargetLibraryInfo *TLI, StringRef Name = "strncpy");
  79
  80   /// Emit a call to the __memcpy_chk function to the builder. This expects that
  81   /// the Len and ObjSize have type 'intptr_t' and Dst/Src are pointers.
  82   Value *emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
  83                        IRBuilder<> &B, const DataLayout &DL,
  84                        const TargetLibraryInfo *TLI);
  85
  86   /// Emit a call to the memchr function. This assumes that Ptr is a pointer,
  87   /// Val is an i32 value, and Len is an 'intptr_t' value.
  88   Value *emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
  89                     const DataLayout &DL, const TargetLibraryInfo *TLI);
  90
  91   /// Emit a call to the memcmp function.
  92   Value *emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
  93                     const DataLayout &DL, const TargetLibraryInfo *TLI);
  94
  95   /// Emit a call to the unary function named 'Name' (e.g.  'floor'). This
  96   /// function is known to take a single of type matching 'Op' and returns one
  97   /// value with the same type. If 'Op' is a long double, 'l' is added as the
  98   /// suffix of name, if 'Op' is a float, we add a 'f' suffix.
  99   Value *emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
 100                               const AttributeList &Attrs);
 101
 102   /// Emit a call to the unary function DoubleFn, FloatFn or LongDoubleFn,
 103   /// depending of the type of Op.
 104   Value *emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
 105                               LibFunc DoubleFn, LibFunc FloatFn,
 106                               LibFunc LongDoubleFn, IRBuilder<> &B,
 107                               const AttributeList &Attrs);
 108
 109   /// Emit a call to the binary function named 'Name' (e.g. 'fmin'). This
 110   /// function is known to take type matching 'Op1' and 'Op2' and return one
 111   /// value with the same type. If 'Op1/Op2' are long double, 'l' is added as
 112   /// the suffix of name, if 'Op1/Op2' are float, we add a 'f' suffix.
 113   Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
 114                                IRBuilder<> &B, const AttributeList &Attrs);
 115
 116   /// Emit a call to the putchar function. This assumes that Char is an integer.
 117   Value *emitPutChar(Value *Char, IRBuilder<> &B, const TargetLibraryInfo *TLI);
 118
 119   /// Emit a call to the puts function. This assumes that Str is some pointer.
 120   Value *emitPutS(Value *Str, IRBuilder<> &B, const TargetLibraryInfo *TLI);
 121
 122   /// Emit a call to the fputc function. This assumes that Char is an i32, and
 123   /// File is a pointer to FILE.
 124   Value *emitFPutC(Value *Char, Value *File, IRBuilder<> &B,
 125                    const TargetLibraryInfo *TLI);
 126
 127   /// Emit a call to the fputc_unlocked function. This assumes that Char is an
 128   /// i32, and File is a pointer to FILE.
 129   Value *emitFPutCUnlocked(Value *Char, Value *File, IRBuilder<> &B,
 130                            const TargetLibraryInfo *TLI);
 131
 132   /// Emit a call to the fputs function. Str is required to be a pointer and
 133   /// File is a pointer to FILE.
 134   Value *emitFPutS(Value *Str, Value *File, IRBuilder<> &B,
 135                    const TargetLibraryInfo *TLI);
 136
 137   /// Emit a call to the fputs_unlocked function. Str is required to be a
 138   /// pointer and File is a pointer to FILE.
 139   Value *emitFPutSUnlocked(Value *Str, Value *File, IRBuilder<> &B,
 140                            const TargetLibraryInfo *TLI);
 141
 142   /// Emit a call to the fwrite function. This assumes that Ptr is a pointer,
 143   /// Size is an 'intptr_t', and File is a pointer to FILE.
 144   Value *emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
 145                     const DataLayout &DL, const TargetLibraryInfo *TLI);
 146
 147   /// Emit a call to the malloc function.
 148   Value *emitMalloc(Value *Num, IRBuilder<> &B, const DataLayout &DL,
 149                     const TargetLibraryInfo *TLI);
 150
 151   /// Emit a call to the calloc function.
 152   Value *emitCalloc(Value *Num, Value *Size, const AttributeList &Attrs,
 153                     IRBuilder<> &B, const TargetLibraryInfo &TLI);
 154
 155   /// Emit a call to the fwrite_unlocked function. This assumes that Ptr is a
 156   /// pointer, Size is an 'intptr_t', N is nmemb and File is a pointer to FILE.
 157   Value *emitFWriteUnlocked(Value *Ptr, Value *Size, Value *N, Value *File,
 158                             IRBuilder<> &B, const DataLayout &DL,
 159                             const TargetLibraryInfo *TLI);
 160
 161   /// Emit a call to the fgetc_unlocked function. File is a pointer to FILE.
 162   Value *emitFGetCUnlocked(Value *File, IRBuilder<> &B,
 163                            const TargetLibraryInfo *TLI);
 164
 165   /// Emit a call to the fgets_unlocked function. Str is required to be a
 166   /// pointer, Size is an i32 and File is a pointer to FILE.
 167   Value *emitFGetSUnlocked(Value *Str, Value *Size, Value *File, IRBuilder<> &B,
 168                            const TargetLibraryInfo *TLI);
 169
 170   /// Emit a call to the fread_unlocked function. This assumes that Ptr is a
 171   /// pointer, Size is an 'intptr_t', N is nmemb and File is a pointer to FILE.
 172   Value *emitFReadUnlocked(Value *Ptr, Value *Size, Value *N, Value *File,
 173                            IRBuilder<> &B, const DataLayout &DL,
 174                            const TargetLibraryInfo *TLI);
 175 }
 176
 177 #endif