[Bug middle-end/34477] New: [4.3 regression] Standard autoconf mktime test is too slow when compiled with -O2

[ismail at pardus dot org dot tr]

See the timing, testcase is the usual mktime test from autoconf :

[~]> gcc -O2 -o mktime mktime.c
[~]> time ./mktime
zsh: alarm      ./mktime
./mktime  32,22s user 27,70s system 99% cpu 1:00,00 total

[~]> gcc -o mktime mktime.c
[~]> time ./mktime
./mktime  0,04s user 0,03s system 100% cpu 0,067 total

[~]> gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --prefix=/usr
--bindir=/usr/i686-pc-linux-gnu/gcc/4.3.0
--includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include
--datadir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0
--mandir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/man
--infodir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include/g++-v3
--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-libgcj
--disable-libssp --disable-multilib --disable-nls --disable-werror
--enable-checking=release --enable-clocale=gnu --enable-__cxa_atexit
--enable-languages=c,c++,fortran,objc,obj-c++,treelang
--enable-libstdcxx-allocator=new --enable-shared --enable-ssp
--enable-threads=posix --enable-version-specific-runtime-libs
--without-included-gettext --without-system-libunwind --with-system-zlib
--with-pkgversion='Pardus Linux' --with-bugurl=http://bugs.pardus.org.tr
Thread model: posix
gcc version 4.3.0 20071215 [trunk revision 130952] (Pardus Linux)


-- 
           Summary: [4.3 regression] Standard autoconf mktime test is too
                    slow when compiled with -O2
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ismail at pardus dot org dot tr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34477