https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66652
--- Comment #1 from vries at gcc dot gnu.org --- Created attachment 35853 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35853&action=edit demonstrator patch This patch fixes the correctness issue, but it fails to do transform_to_exit_first_loop_alt for unsigned loop counters: ... PASS: gcc.dg/parloops-exit-first-loop-alt-2.c (test for excess errors) PASS: gcc.dg/parloops-exit-first-loop-alt-2.c scan-tree-dump-times parloops "(?n)\\[i" 9 PASS: gcc.dg/parloops-exit-first-loop-alt-3.c (test for excess errors) FAIL: gcc.dg/parloops-exit-first-loop-alt-3.c scan-tree-dump-times parloops "(?n)\\* 4" 3 PASS: gcc.dg/parloops-exit-first-loop-alt-4.c (test for excess errors) PASS: gcc.dg/parloops-exit-first-loop-alt-4.c scan-tree-dump-times parloops "(?n)\\* 4" 3 PASS: gcc.dg/parloops-exit-first-loop-alt-5.c (test for excess errors) PASS: gcc.dg/parloops-exit-first-loop-alt-5.c scan-tree-dump-times parloops "(?n)% 13" 4 PASS: gcc.dg/parloops-exit-first-loop-alt-6.c (test for excess errors) FAIL: gcc.dg/parloops-exit-first-loop-alt-6.c scan-tree-dump-times parloops "(?n)\\[i" 9 PASS: gcc.dg/parloops-exit-first-loop-alt-7.c (test for excess errors) FAIL: gcc.dg/parloops-exit-first-loop-alt-7.c scan-tree-dump-times parloops "(?n)\\[i" 9 PASS: gcc.dg/parloops-exit-first-loop-alt-8.c (test for excess errors) FAIL: gcc.dg/parloops-exit-first-loop-alt-8.c scan-tree-dump-times parloops "(?n)\\[i" 9 PASS: gcc.dg/parloops-exit-first-loop-alt.c (test for excess errors) FAIL: gcc.dg/parloops-exit-first-loop-alt.c scan-tree-dump-times parloops "(?n)\\[i" 9 ...
