https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98513
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:a05cc70a6c1ae0e5b22e16f4d8d13995a38ea1f9 commit r11-6499-ga05cc70a6c1ae0e5b22e16f4d8d13995a38ea1f9 Author: Richard Biener <rguent...@suse.de> Date: Wed Jan 6 09:26:55 2021 +0100 tree-optimization/98513 - fix bug in range intersection code This fixes a premature optimization in the range intersection code which assumes earlier branches have to be taken, not taking into account that for symbolic ranges we cannot always compare endpoints. The fix is to instantiate the compare deemed redundant (which then fails as undecidable for the testcase). 2021-01-06 Richard Biener <rguent...@suse.de> PR tree-optimization/98513 * value-range.cc (intersect_ranges): Compare the upper bounds for the expected relation. * gcc.dg/tree-ssa/pr98513.c: New testcase.
