https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96232
--- 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:9e12b8b1819342ef7efac58cf7f4ba4294abe551 commit r11-5804-g9e12b8b1819342ef7efac58cf7f4ba4294abe551 Author: Jakub Jelinek <ja...@redhat.com> Date: Sun Dec 6 10:55:12 2020 +0100 match.pd: Improve conditional_replacement for x ? 0 : -1 [PR796232] As mentioned in the PR, for boolean x we currently optimize in phiopt x ? 0 : -1 into -(int)!x but it can be optimized as (int) x - 1 which is one less operation both in GIMPLE and in x86 assembly. This patch optimizes it in match.pd, by optimizing -(type)!x when x has boolean range into (type)x - 1. 2020-12-06 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/96232 * match.pd (-(type)!A -> (type)A - 1): New optimization. * gcc.dg/tree-ssa/pr96232-1.c: New test.
