------- Comment #10 from eres at il dot ibm dot com 2009-10-25 12:41 ------- (In reply to comment #0) > Hello! > The "[patch, vectorizer] misaligned store support" patch [1] resulted in more > than 10% longer execution time for Polyhedron test_fpu test on Core2. > The test is compiled with "-march=x86-64 -ffast-math -funroll-loops -O3",
This patch changes wrongly the decision of when to peel the loop which causes the negative effect on the performance. I am preparing a patch to fix this. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40648
