https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116921
--- Comment #3 from GCC 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:92e9e971ced90af5a825ae4b35ad6c98c9ab86da commit r15-4063-g92e9e971ced90af5a825ae4b35ad6c98c9ab86da Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Oct 4 13:12:45 2024 +0200 i386: Fix up ix86_expand_int_compare with TImode comparisons of SUBREGs from V8{H,B}Fmode against zero [PR116921] The following testcase ICEs, because the ix86_expand_int_compare optimization to use {,v}ptest assumes there are instructions for all 16-byte vector modes. That isn't the case, we only have one for V16QI, V8HI, V4SI, V2DI, V1TI, V4SF and V2DF, not for V8HF nor V8BF. The following patch fixes that by using the V8HI instruction instead for those 2 modes. tmp can't be a SUBREG, because it is SUBREG_REG of another SUBREG, so we don't need to worry about gen_lowpart failing. 2024-10-04 Jakub Jelinek <ja...@redhat.com> PR target/116921 * config/i386/i386-expand.cc (ix86_expand_int_compare): Add a SUBREG to V8HImode from V8HFmode or V8BFmode before generating a ptest. * gcc.target/i386/pr116921.c: New test.
