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| author | Daniel Dunbar <daniel@zuster.org> | 2009-03-17 21:15:18 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2009-03-17 21:15:18 +0000 |
| commit | b372c1114c1eeffbd1a3f6ddc5d33e77564bfee2 (patch) | |
| tree | 023532e358a24263eeb1eb2677711fb2c6e9f5c5 /include/llvm/Support/Compiler.h | |
| parent | 3985728bdefeec6acdcdf4dc78cbe1b9fb7cb72b (diff) | |
| download | llvm-b372c1114c1eeffbd1a3f6ddc5d33e77564bfee2.tar.gz llvm-b372c1114c1eeffbd1a3f6ddc5d33e77564bfee2.tar.bz2 llvm-b372c1114c1eeffbd1a3f6ddc5d33e77564bfee2.tar.xz | |
Add BUILTIN_EXPECT Support/Compiler macro.
- Use for exceptional buffer conditions in raw_ostream:write to shave
off a cycle or two.
- Please rename if you have a better one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67103 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index 7186b22a40..90292df381 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -29,6 +29,12 @@ #define ATTRIBUTE_USED #endif +#if (__GNUC__ >= 4) +#define BUILTIN_EXPECT(EXPR, VALUE) __builtin_expect((EXPR), (VALUE)) +#else +#define BUILTIN_EXPECT(EXPR, VALUE) (EXPR) +#endif + // C++ doesn't support 'extern template' of template specializations. GCC does, // but requires __extension__ before it. In the header, use this: // EXTERN_TEMPLATE_INSTANTIATION(class foo<bar>); |