LLVM  6.0.0svn
BuildLibCalls.h
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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 LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
16 #define LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
17 
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 
32  /// Return V if it is an i8*, otherwise cast it to i8*.
33  Value *castToCStr(Value *V, IRBuilder<> &B);
34 
35  /// Emit a call to the strlen function to the builder, for the specified
36  /// pointer. Ptr is required to be some pointer type, and the return value has
37  /// 'intptr_t' type.
38  Value *emitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL,
39  const TargetLibraryInfo *TLI);
40 
41  /// Emit a call to the strnlen function to the builder, for the specified
42  /// pointer. Ptr is required to be some pointer type, MaxLen must be of size_t
43  /// type, and the return value has 'intptr_t' type.
44  Value *emitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
45  const DataLayout &DL, const TargetLibraryInfo *TLI);
46 
47  /// Emit a call to the strchr function to the builder, for the specified
48  /// pointer and character. Ptr is required to be some pointer type, and the
49  /// return value has 'i8*' type.
50  Value *emitStrChr(Value *Ptr, char C, IRBuilder<> &B,
51  const TargetLibraryInfo *TLI);
52 
53  /// Emit a call to the strncmp function to the builder.
54  Value *emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
55  const DataLayout &DL, const TargetLibraryInfo *TLI);
56 
57  /// Emit a call to the strcpy function to the builder, for the specified
58  /// pointer arguments.
59  Value *emitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
60  const TargetLibraryInfo *TLI, StringRef Name = "strcpy");
61 
62  /// Emit a call to the strncpy function to the builder, for the specified
63  /// pointer arguments and length.
64  Value *emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
65  const TargetLibraryInfo *TLI, StringRef Name = "strncpy");
66 
67  /// Emit a call to the __memcpy_chk function to the builder. This expects that
68  /// the Len and ObjSize have type 'intptr_t' and Dst/Src are pointers.
69  Value *emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
70  IRBuilder<> &B, const DataLayout &DL,
71  const TargetLibraryInfo *TLI);
72 
73  /// Emit a call to the memchr function. This assumes that Ptr is a pointer,
74  /// Val is an i32 value, and Len is an 'intptr_t' value.
75  Value *emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
76  const DataLayout &DL, const TargetLibraryInfo *TLI);
77 
78  /// Emit a call to the memcmp function.
79  Value *emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
80  const DataLayout &DL, const TargetLibraryInfo *TLI);
81 
82  /// Emit a call to the unary function named 'Name' (e.g. 'floor'). This
83  /// function is known to take a single of type matching 'Op' and returns one
84  /// value with the same type. If 'Op' is a long double, 'l' is added as the
85  /// suffix of name, if 'Op' is a float, we add a 'f' suffix.
86  Value *emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
87  const AttributeList &Attrs);
88 
89  /// Emit a call to the binary function named 'Name' (e.g. 'fmin'). This
90  /// function is known to take type matching 'Op1' and 'Op2' and return one
91  /// value with the same type. If 'Op1/Op2' are long double, 'l' is added as
92  /// the suffix of name, if 'Op1/Op2' are float, we add a 'f' suffix.
93  Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
94  IRBuilder<> &B, const AttributeList &Attrs);
95 
96  /// Emit a call to the putchar function. This assumes that Char is an integer.
97  Value *emitPutChar(Value *Char, IRBuilder<> &B, const TargetLibraryInfo *TLI);
98 
99  /// Emit a call to the puts function. This assumes that Str is some pointer.
100  Value *emitPutS(Value *Str, IRBuilder<> &B, const TargetLibraryInfo *TLI);
101 
102  /// Emit a call to the fputc function. This assumes that Char is an i32, and
103  /// File is a pointer to FILE.
104  Value *emitFPutC(Value *Char, Value *File, IRBuilder<> &B,
105  const TargetLibraryInfo *TLI);
106 
107  /// Emit a call to the puts function. Str is required to be a pointer and
108  /// File is a pointer to FILE.
109  Value *emitFPutS(Value *Str, Value *File, IRBuilder<> &B,
110  const TargetLibraryInfo *TLI);
111 
112  /// Emit a call to the fwrite function. This assumes that Ptr is a pointer,
113  /// Size is an 'intptr_t', and File is a pointer to FILE.
114  Value *emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
115  const DataLayout &DL, const TargetLibraryInfo *TLI);
116 }
117 
118 #endif
uint64_t CallInst * C
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
F(f)
Value * emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B, const TargetLibraryInfo *TLI, StringRef Name="strncpy")
Emit a call to the strncpy function to the builder, for the specified pointer arguments and length...
Value * emitPutChar(Value *Char, IRBuilder<> &B, const TargetLibraryInfo *TLI)
Emit a call to the putchar function. This assumes that Char is an integer.
Value * emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B, const AttributeList &Attrs)
Emit a call to the unary function named &#39;Name&#39; (e.g.
Value * emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the __memcpy_chk function to the builder.
Value * emitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B, const TargetLibraryInfo *TLI, StringRef Name="strcpy")
Emit a call to the strcpy function to the builder, for the specified pointer arguments.
constexpr char Attrs[]
Key for Kernel::Metadata::mAttrs.
Value * emitFPutS(Value *Str, Value *File, IRBuilder<> &B, const TargetLibraryInfo *TLI)
Emit a call to the puts function.
bool inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI)
Analyze the name and prototype of the given function and set any applicable attributes.
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
Value * castToCStr(Value *V, IRBuilder<> &B)
Return V if it is an i8*, otherwise cast it to i8*.
Value * emitStrChr(Value *Ptr, char C, IRBuilder<> &B, const TargetLibraryInfo *TLI)
Emit a call to the strchr function to the builder, for the specified pointer and character.
Value * emitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the strlen function to the builder, for the specified pointer.
Value * emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name, IRBuilder<> &B, const AttributeList &Attrs)
Emit a call to the binary function named &#39;Name&#39; (e.g.
Value * emitFPutC(Value *Char, Value *File, IRBuilder<> &B, const TargetLibraryInfo *TLI)
Emit a call to the fputc function.
Value * emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the strncmp function to the builder.
Value * emitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the strnlen function to the builder, for the specified pointer.
Value * emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the fwrite function.
Value * emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the memcmp function.
Value * emitPutS(Value *Str, IRBuilder<> &B, const TargetLibraryInfo *TLI)
Emit a call to the puts function. This assumes that Str is some pointer.
constexpr char Size[]
Key for Kernel::Arg::Metadata::mSize.
Value * emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B, const DataLayout &DL, const TargetLibraryInfo *TLI)
Emit a call to the memchr function.