------- Comment #8 from xuepeng dot guo at intel dot com 2009-01-24 05:12 ------- Created an attachment (id=17173) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17173&action=view) An extracted test case for this bug.
Hi tim, I extracted this test case from your website. But I can't exactly reproduce this bug on my machine with a core2 quard micor processor. Can you help me to check whether my test case is valid firstly? Here I post what I got on my machine for your reference: [xg...@shgcc-10 38824]$ /home/xguo2/app/trunk/bin/g++ -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ../src/configure --enable-checking=assert --disable-bootstrap --enable-languages=c,c++,fortran Thread model: posix gcc version 4.4.0 20090121 (experimental) [trunk revision 143537] (GCC) [xg...@shgcc-10 38824]$ /home/xguo2/app/trunk/bin/g++ -O3 -msse -mfpmath=sse simd_unroll_benchmarks.cpp -o 44.out [xg...@shgcc-10 38824]$ time ./44.out real 0m1.877s user 0m1.876s sys 0m0.001s [xg...@shgcc-10 38824]$ time ./44.out real 0m1.877s user 0m1.877s sys 0m0.000s [xg...@shgcc-10 38824]$ time ./44.out real 0m1.881s user 0m1.882s sys 0m0.000s [xg...@shgcc-10 38824]$ /home/xguo2/app/usr/gcc-4.2/bin/g++ -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: /net/gnu-13/export/gnu/src/gcc-4.2/gcc/configure --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --enable-shared --enable-threads=posix --enable-haifa --enable-checking=assert --prefix=/usr/gcc-4.2 --with-local-prefix=/usr/local Thread model: posix gcc version 4.2.0 [xg...@shgcc-10 38824]$ /home/xguo2/app/usr/gcc-4.2/bin/g++ -O3 -msse -mfpmath=sse simd_unroll_benchmarks.cpp -o 42.out [xg...@shgcc-10 38824]$ time ./42.out real 0m1.991s user 0m1.991s sys 0m0.000s [xg...@shgcc-10 38824]$ time ./42.out real 0m1.991s user 0m1.989s sys 0m0.001s [xg...@shgcc-10 38824]$ time ./42.out real 0m1.991s user 0m1.990s sys 0m0.000s [xg...@shgcc-10 38824]$ g++ -v Using built-in specs. Target: x86_64-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-libgcj-multifile --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --with-cpu=generic --host=x86_64-redhat-linux Thread model: posix gcc version 4.1.2 20071124 (Red Hat 4.1.2-42) [xg...@shgcc-10 38824]$ g++ -O3 -msse -mfpmath=sse simd_unroll_benchmarks.cpp -o 41.out [xg...@shgcc-10 38824]$ time ./41.out real 0m1.465s user 0m1.464s sys 0m0.002s [xg...@shgcc-10 38824]$ time ./41.out real 0m1.465s user 0m1.465s sys 0m0.000s [xg...@shgcc-10 38824]$ time ./41.out real 0m1.465s user 0m1.464s sys 0m0.002s -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38824
