1 //===-- llvm/Target/TargetLibraryInfo.h - Library information ---*- 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 #ifndef LLVM_TARGET_TARGETLIBRARYINFO_H
11 #define LLVM_TARGET_TARGETLIBRARYINFO_H
13 #include "llvm/Pass.h"
20 /// void *memset(void *b, int c, size_t len);
23 // void *memcpy(void *s1, const void *s2, size_t n);
26 /// void memset_pattern16(void *b, const void *pattern16, size_t len);
29 /// int iprintf(const char *format, ...);
32 /// int siprintf(char *str, const char *format, ...);
35 /// int fiprintf(FILE *stream, const char *format, ...);
42 /// TargetLibraryInfo - This immutable pass captures information about what
43 /// library functions are available for the current target, and allows a
44 /// frontend to disable optimizations through -fno-builtin etc.
45 class TargetLibraryInfo : public ImmutablePass {
46 unsigned char AvailableArray[(LibFunc::NumLibFuncs+7)/8];
50 TargetLibraryInfo(const Triple &T);
52 /// has - This function is used by optimizations that want to match on or form
53 /// a given library function.
54 bool has(LibFunc::Func F) const {
55 return (AvailableArray[F/8] & (1 << (F&7))) != 0;
58 /// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
59 /// ban use of specific library functions.
60 void setUnavailable(LibFunc::Func F) {
61 AvailableArray[F/8] &= ~(1 << (F&7));
64 void setAvailable(LibFunc::Func F) {
65 AvailableArray[F/8] |= 1 << (F&7);
68 /// disableAllFunctions - This disables all builtins, which is used for
69 /// options like -fno-builtin.
70 void disableAllFunctions();
73 } // end namespace llvm