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| author | Zack Weinberg <zack@gcc.gnu.org> | 2001-09-10 22:34:03 +0000 |
|---|---|---|
| committer | Zack Weinberg <zack@gcc.gnu.org> | 2001-09-10 22:34:03 +0000 |
| commit | 2c3fcba6dc56f848a07332ff005e2db9054dca26 (patch) | |
| tree | 68c8a29210b56a578f8917368423b34eaeea5d60 /gcc/system.h | |
| parent | b210ec460ed82323e4a8fea320bf7a2c241e4369 (diff) | |
| download | gcc-2c3fcba6dc56f848a07332ff005e2db9054dca26.zip gcc-2c3fcba6dc56f848a07332ff005e2db9054dca26.tar.gz gcc-2c3fcba6dc56f848a07332ff005e2db9054dca26.tar.bz2 | |
cpplex.c (parse_identifier): Fast-path optimize.
* cpplex.c (parse_identifier): Fast-path optimize. Avoid
copying identifier when we're just going to throw it away.
(parse_identifier_slow): New routine to handle abnormal cases.
(_cpp_lex_token): Update call site.
* hashtable.c (ht_lookup): Don't assume that the string we've
been given is NUL-terminated.
* system.h: #define __builtin_expect(a, b) to (a) if not
GCC >=3.0.
From-SVN: r45529
Diffstat (limited to 'gcc/system.h')
| -rw-r--r-- | gcc/system.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h index 6b58083..7938fb6 100644 --- a/gcc/system.h +++ b/gcc/system.h @@ -490,6 +490,13 @@ extern void abort PARAMS ((void)); #endif /* ! __FUNCTION__ */ #endif +/* __builtin_expect(A, B) evaluates to A, but notifies the compiler that + the most likely value of A is B. This feature was added at some point + between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */ +#if (GCC_VERSION < 3000) +#define __builtin_expect(a, b) (a) +#endif + /* Provide some sort of boolean type. We use stdbool.h if it's available. This must be after all inclusion of system headers, as some of them will mess us up. */ |