https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:565ab7efbdc68cca5a2a81d872015f33359048b4 commit r10-7351-g565ab7efbdc68cca5a2a81d872015f33359048b4 Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Mar 24 09:36:32 2020 +0100 loop-manip: Avoid -fcompare-debug issues in create_iv [PR94285] The following testcase FAILs with -fcompare-debug. The problem is that create_iv behaves differently when inserting after into an empty bb (in that case sets location to goto_locus), or when inserting before gsi_end_p (i.e. at the end of bb; in that case it will not set location, otherwise it will set it to the location of next stmt). This isn't -fcompare-debug friendly, because if inserting after and the bb contains only debug stmts, then the location will not be set with -g and will be with -g0, or when inserting before, the location might either be set from the following debug stmt rather than some non-debug stmt after that, or might not be set with -g0 if it is to be inserted at the end of bb, while with -g would be set to location of debug stmt. 2020-03-24 Jakub Jelinek <ja...@redhat.com> PR debug/94285 * tree-ssa-loop-manip.c (create_iv): If after, set stmt location to e->goto_locus even if gsi_bb (*incr_pos) contains only debug stmts. If not after and at *incr_pos is a debug stmt, set stmt location to location of next non-debug stmt after it if any. * gfortran.dg/pr94285.f90: New test.
