[Bug tree-optimization/36765] [4.4 Regression] Revision 137573 miscompiles 464.h264ref in SPEC CPU 2006

[Joey dot ye at intel dot com]

------- Comment #1 from Joey dot ye at intel dot com  2008-07-11 05:46 -------
Created an attachment (id=15897)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15897&action=view)
Small test case reduced from cpu2006.464.h264ref

/home/jye2/work/bug-37665> gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../src/configure --disable-bootstrap
--enable-languages=c,c++,fortran --enable-checking=assert
Thread model: posix
gcc version 4.4.0 20080707 (experimental) [trunk revision 137573] (GCC) 
/home/jye2/work/bug-37665> make -B && ./m.exe && echo PASS
gcc -c main.c -g
gcc -O2 -ffast-math -g   -c -o l5.o l5.c
gcc -o m.exe main.o l5.o
Bmin[0]=21
Aborted

/home/jye2/work/bug-37665> gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../src/configure --disable-bootstrap
--enable-languages=c,c++,fortran --enable-checking=assert
Thread model: posix
gcc version 4.4.0 20080707 (experimental) [trunk revision 137572] (GCC) 
/home/jye2/work/bug-37665> make -B && ./m.exe && echo PASS
gcc -c main.c -g
gcc -O2 -ffast-math -g   -c -o l5.o l5.c
gcc -o m.exe main.o l5.o
PASS


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36765