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| author | Matt Turner <mattst88@gmail.com> | 2016-06-30 14:16:16 -0700 |
|---|---|---|
| committer | Matt Turner <mattst88@gmail.com> | 2016-07-21 10:45:28 -0700 |
| commit | 5353855e9d0f470d9d4799850002a181d2b3b151 (patch) | |
| tree | f7b3be1cc3d71f48e5b023aca6ba0fbb25749d1b /configure.ac | |
| parent | 5ec140c17b54c25920091501b665b9aa809cc5e8 (diff) | |
| download | external_mesa3d-5353855e9d0f470d9d4799850002a181d2b3b151.zip external_mesa3d-5353855e9d0f470d9d4799850002a181d2b3b151.tar.gz external_mesa3d-5353855e9d0f470d9d4799850002a181d2b3b151.tar.bz2 | |
mesa: Drop -fno-builtin-memcmp.
According to the referenced bug report, gcc-4.5 and newer do not inline
memcmp(). I see no difference in performance of ipers with llvmpipe on a
Sandybridge (which does not have "Enhanced REP MOVSB/STOSB") by removing
this flag.
I attempted to confirm the problem with gcc-4.4, but it fails to compile
for quite a few different reasons.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/configure.ac b/configure.ac index 1ca8359..accd1a1 100644 --- a/configure.ac +++ b/configure.ac @@ -306,10 +306,6 @@ if test "x$GCC" = xyes; then # We don't want floating-point math functions to set errno or trap CFLAGS="$CFLAGS -fno-math-errno -fno-trapping-math" - # gcc's builtin memcmp is slower than glibc's - # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052 - CFLAGS="$CFLAGS -fno-builtin-memcmp" - # Flags to help ensure that certain portions of the code -- and only those # portions -- can be built with MSVC: # - src/util, src/gallium/auxiliary, rc/gallium/drivers/llvmpipe, and @@ -348,10 +344,6 @@ if test "x$GXX" = xyes; then # Work around aliasing bugs - developers should comment this out CXXFLAGS="$CXXFLAGS -fno-strict-aliasing" - - # gcc's builtin memcmp is slower than glibc's - # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052 - CXXFLAGS="$CXXFLAGS -fno-builtin-memcmp" fi AC_SUBST([MSVC2013_COMPAT_CFLAGS]) |