https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126410
--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Richard Biener <[email protected]>: https://gcc.gnu.org/g:fafb0599acc780009c23514d373d17589b73fdff commit r15-11490-gfafb0599acc780009c23514d373d17589b73fdff Author: H.J. Lu <[email protected]> Date: Sun Jul 26 19:21:55 2026 +0800 vectorizer: Don't enlarge base alignment during costing We errorneously commit the recorded base alignment during costing since the costing refactoring. This causes alignment to be computed based on a possibly larger vector type than used in the end. gcc/ PR middle-end/126410 * tree-vect-stmts.cc (vectorizable_store): Only commit to recorded base alignment when transforming. (vectorizable_load): Likewise. gcc/testsuite/ PR middle-end/126410 * gcc.target/i386/pr126410-1a.c: New test. * gcc.target/i386/pr126410-1b.c: Likewise. * gcc.target/i386/pr126410-1c.c: Likewise. * gcc.target/i386/pr126410-2a.c: Likewise. * gcc.target/i386/pr126410-2b.c: Likewise. * gcc.target/i386/pr126410-2c.c: Likewise. Co-Authored-By: Richard Biener <[email protected]> Signed-off-by: H.J. Lu <[email protected]> (cherry picked from commit 7c7c6626410c261d188a96d9b2a15d3781d0dcfb)
