------- Comment #5 from drow at gcc dot gnu dot org 2010-08-10 16:01 ------- Verified on x86_64 using:
gcc-4.3 -O3 -o 43.s -S reduc.c -ftree-vectorizer-verbose=1 [two loops vectorized] gcc-4.4 -O3 -o 43.s -S reduc.c -ftree-vectorizer-verbose=1 [one loop vectorized] -- drow at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |irar at gcc dot gnu dot org Known to fail| |4.4.4 Known to work| |4.3.5 Summary|Complete unrolling (inner) |[4.5/4.6 regression] |versus vectorization of |Complete unrolling (inner) |reduction |versus vectorization of | |reduction http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41881