https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104704
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>: https://gcc.gnu.org/g:609e8c492d62d92465460eae3d43dfc4b2c68288 commit r12-7472-g609e8c492d62d92465460eae3d43dfc4b2c68288 Author: H.J. Lu <hjl.to...@gmail.com> Date: Sat Feb 26 14:17:23 2022 -0800 x86: Always return pseudo register in ix86_gen_scratch_sse_rtx ix86_gen_scratch_sse_rtx returns XMM7/XMM15/XMM31 as a scratch vector register to prevent RTL optimizers from removing vector register. It introduces a conflict with explicit XMM7/XMM15/XMM31 usage and when it is called by RTL optimizers, it may introduce conflicting usages of XMM7/XMM15/XMM31. Change ix86_gen_scratch_sse_rtx to always return a pseudo register and xfail x86 tests which are optimized with a hard scratch register. gcc/ PR target/104704 * config/i386/i386.cc (ix86_gen_scratch_sse_rtx): Always return a pseudo register. gcc/testsuite/ PR target/104704 * gcc.target/i386/incoming-11.c: Xfail. * gcc.target/i386/pieces-memset-3.c: Likewise. * gcc.target/i386/pieces-memset-37.c: Likewise. * gcc.target/i386/pieces-memset-39.c: Likewise. * gcc.target/i386/pieces-memset-46.c: Likewise. * gcc.target/i386/pieces-memset-47.c: Likewise. * gcc.target/i386/pieces-memset-48.c: Likewise. * gcc.target/i386/pr90773-5.c: Likewise. * gcc.target/i386/pr90773-14.c: Likewise. * gcc.target/i386/pr90773-17.c: Likewise. * gcc.target/i386/pr100865-8a.c: Likewise. * gcc.target/i386/pr100865-8c.c: Likewise. * gcc.target/i386/pr100865-9c.c: Likewise. * gcc.target/i386/pieces-memset-21.c: Always expect vzeroupper. * gcc.target/i386/pr82941-1.c: Likewise. * gcc.target/i386/pr82942-1.c: Likewise. * gcc.target/i386/pr82990-1.c: Likewise. * gcc.target/i386/pr82990-3.c: Likewise. * gcc.target/i386/pr82990-5.c: Likewise. * gcc.target/i386/pr100865-11b.c: Expect vmovdqa instead of vmovdqa64. * gcc.target/i386/pr100865-12b.c: Likewise. * gcc.target/i386/pr100865-8b.c: Likewise. * gcc.target/i386/pr100865-9b.c: Likewise. * gcc.target/i386/pr104704-1.c: New test. * gcc.target/i386/pr104704-2.c: Likewise. * gcc.target/i386/pr104704-3.c: Likewise. * gcc.target/i386/pr104704-4.c: Likewise. * gcc.target/i386/pr104704-5.c: Likewise. * gcc.target/i386/pr104704-6.c: Likewise.