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| author | Steven Bosscher <stevenb@suse.de> | 2005-01-16 21:09:24 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2005-01-16 21:09:24 +0000 |
| commit | 6f0947e4010c96079f97d9ffe9629d5270d816f2 (patch) | |
| tree | 146a66df19f420ca576e53cd91dfd89894f09879 /gcc/ggc-page.c | |
| parent | f53d3f931757427a50c22c4dc54b0f01e290fcbd (diff) | |
| download | gcc-6f0947e4010c96079f97d9ffe9629d5270d816f2.tar.gz | |
ggc-page.c (ggc_alloc_stat): Use __builtin_ctzl instead of a loop to look for a free slot in a page entry.
* ggc-page.c (ggc_alloc_stat): Use __builtin_ctzl instead of a
loop to look for a free slot in a page entry.
From-SVN: r93738
Diffstat (limited to 'gcc/ggc-page.c')
| -rw-r--r-- | gcc/ggc-page.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ggc-page.c b/gcc/ggc-page.c index e0dfb1610d4..362bfe19763 100644 --- a/gcc/ggc-page.c +++ b/gcc/ggc-page.c @@ -1139,8 +1139,14 @@ ggc_alloc_stat (size_t size MEM_STAT_DECL) word = bit = 0; while (~entry->in_use_p[word] == 0) ++word; + +#if GCC_VERSION >= 3004 + bit = __builtin_ctzl (~entry->in_use_p[word]); +#else while ((entry->in_use_p[word] >> bit) & 1) ++bit; +#endif + hint = word * HOST_BITS_PER_LONG + bit; } |