[Bug tree-optimization/59967] [4.8/4.9 Regression] Performance regression from 4.7.x to 4.8.x (loop not unrolled)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59967 --- Comment #3 from Christoph Breitkopf --- It's this conditional in the inner loop. The expression becomes constant only if both loops are unrolled (i and j are the loop counters): if (1<

[Bug c/59967] New: Performance regression from 4.7.x to 4.8.x (loop not unrolled)

Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: chbreitkopf at gmail dot com Created attachment 31967 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31967&action=edit preprocessed source of ray/src/rt/ambient.c gcc 4.8.x gener