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From: "regehr at cs dot utah.edu" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/52286] wrong code bug Date: Thu, 16 Feb 2012 18:52:00 -0000 [thread overview] Message-ID: <bug-52286-4-35okM70fM2@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-52286-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52286 John Regehr <regehr at cs dot utah.edu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |chenyang at cs dot utah.edu --- Comment #1 from John Regehr <regehr at cs dot utah.edu> 2012-02-16 18:48:18 UTC --- [regehr@gamow 1]$ current-gcc -O0 small.c ; ./a.out 1 [regehr@gamow 1]$ current-gcc -O1 small.c ; ./a.out 0 [regehr@gamow 1]$ current-gcc -v Using built-in specs. COLLECT_GCC=current-gcc COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r184311-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../configure --with-libelf=/usr/local --enable-lto --prefix=/home/regehr/z/compiler-install/gcc-r184311-install --program-prefix=r184311- --enable-languages=c,c++ Thread model: posix gcc version 4.7.0 20120216 (experimental) (GCC) [regehr@gamow 1]$ cat small.c int printf ( const char *, ... ); int c, a, b; int fn1 ( void ) { return c < 0; } int main ( ) { b = ( ~a | 0 >= 0 ) & 0x98685255F; printf ( "%d\n", ( ( b ) < 0 ) ); return 0; }
next prev parent reply other threads:[~2012-02-16 18:49 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-02-16 18:49 [Bug c/52286] New: " regehr at cs dot utah.edu 2012-02-16 18:52 ` regehr at cs dot utah.edu [this message] 2012-02-16 18:54 ` [Bug c/52286] " regehr at cs dot utah.edu 2012-02-16 19:22 ` jakub at gcc dot gnu.org 2012-02-16 19:29 ` [Bug c/52286] [4.6/4.7 Regression] " jakub at gcc dot gnu.org 2012-02-17 4:50 ` [Bug tree-optimization/52286] " pinskia at gcc dot gnu.org 2012-02-17 4:53 ` pinskia at gcc dot gnu.org 2012-02-17 5:46 ` pinskia at gcc dot gnu.org 2012-02-17 10:46 ` jakub at gcc dot gnu.org 2012-02-17 11:37 ` jakub at gcc dot gnu.org 2012-02-20 12:02 ` rguenth at gcc dot gnu.org 2012-02-20 12:54 ` jakub at gcc dot gnu.org 2012-02-20 12:59 ` [Bug tree-optimization/52286] [4.6 " jakub at gcc dot gnu.org 2012-02-23 18:25 ` jakub at gcc dot gnu.org 2012-02-23 21:53 ` jakub at gcc dot gnu.org
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