https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110991
--- Comment #4 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:bcdbedb3e6083ad01d844ed97cf19645c1ef6568 commit r14-3216-gbcdbedb3e6083ad01d844ed97cf19645c1ef6568 Author: Richard Biener <rguent...@suse.de> Date: Mon Aug 14 09:31:18 2023 +0200 tree-optimization/110991 - unroll size estimate after vectorization The following testcase shows that we are bad at identifying inductions that will be optimized away after vectorizing them because SCEV doesn't handle vectorized defs. The following rolls a simpler identification of SSA cycles covering a PHI and an assignment with a binary operator with a constant second operand. PR tree-optimization/110991 * tree-ssa-loop-ivcanon.cc (constant_after_peeling): Handle VIEW_CONVERT_EXPR <op>, handle more simple IV-like SSA cycles that will end up constant. * gcc.dg/tree-ssa/cunroll-16.c: New testcase.
