https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92819
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Guenther <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:fc98d038618b792c413212759057b2125507d3ef commit r10-6425-gfc98d038618b792c413212759057b2125507d3ef Author: Richard Biener <rguent...@suse.de> Date: Tue Feb 4 10:03:03 2020 +0100 tree-optimization/92819 restrict new vector CTOR canonicalization The PR shows that code generation ends up pessimized by the new canonicalization rules that end up nailing do-not-care elements to specific values making it hard to generate good code later. The temporary solution is to avoid this for the cases we also obviously know the canonicalization will create more GIMPLE stmts than before. 2020-02-04 Richard Biener <rguent...@suse.de> PR tree-optimization/92819 * tree-ssa-forwprop.c (simplify_vector_constructor): Avoid generating more stmts than before. * gcc.target/i386/pr92819.c: New testcase. * gcc.target/i386/pr92803.c: Adjust.
