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| author | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-15 02:35:19 +0000 |
|---|---|---|
| committer | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-15 02:35:19 +0000 |
| commit | df9a70900a7380bc9b42b12ab90cf182988bcd45 (patch) | |
| tree | c0a4bf7a1b4a3819490ec9ef85296298578a1685 /configure.ac | |
| parent | 39cfa67b4f56e0c79afb352b1e9bf5c914b774ca (diff) | |
__builtin_alloca_with_align for optimal memory access
ALLOCA_N takes type arugment. It is natural that the returned
value to be used as an array of type, thus type-aligned.
Luckily GCC has a builtin to tell compiler such alignment info.
This should generate beter instructions.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61830 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index e5be5a778e..93341fc777 100644 --- a/configure.ac +++ b/configure.ac @@ -2493,6 +2493,7 @@ AC_CACHE_CHECK([for $1], AS_TR_SH(rb_cv_builtin_$1), AS_IF([test "${AS_TR_SH(rb_cv_builtin_$1)}" != no], [ AC_DEFINE(AS_TR_CPP(HAVE_BUILTIN_$1)) ])]) +RUBY_CHECK_BUILTIN_FUNC(__builtin_alloca_with_align, [__builtin_alloca_with_align(1, 4096)]) RUBY_CHECK_BUILTIN_FUNC(__builtin_assume_aligned, [__builtin_assume_aligned((void*)32, 32)]) RUBY_CHECK_BUILTIN_FUNC(__builtin_bswap16, [__builtin_bswap16(0)]) RUBY_CHECK_BUILTIN_FUNC(__builtin_bswap32, [__builtin_bswap32(0)]) |