https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116274
--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>: https://gcc.gnu.org/g:f7e672da8fc3d416a6d07eb01f3be4400ef94fac commit r15-2930-gf7e672da8fc3d416a6d07eb01f3be4400ef94fac Author: liuhongt <hongtao....@intel.com> Date: Mon Aug 12 18:24:34 2024 +0800 Movement between GENERAL_REGS and SSE_REGS for TImode doesn't need secondary reload. It results in 2 failures for x86_64-pc-linux-gnu{\ -march=cascadelake}; gcc: gcc.target/i386/extendditi3-1.c scan-assembler cqt?o gcc: gcc.target/i386/pr113560.c scan-assembler-times \tmulq 1 For pr113560.c, now GCC generates mulx instead of mulq with -march=cascadelake, which should be optimal, so adjust testcase for that. For gcc.target/i386/extendditi2-1.c, RA happens to choose another register instead of rax and result in movq %rdi, %rbp movq %rdi, %rax sarq $63, %rbp movq %rbp, %rdx The patch adds a new define_peephole2 for that. gcc/ChangeLog: PR target/116274 * config/i386/i386-expand.cc (ix86_expand_vector_move): Restrict special case TImode to 128-bit vector conversions via V2DI under ix86_pre_reload_split (). * config/i386/i386.cc (inline_secondary_memory_needed): Movement between GENERAL_REGS and SSE_REGS for TImode doesn't need secondary reload. * config/i386/i386.md (*extendsidi2_rex64): Add a define_peephole2 after it. gcc/testsuite/ChangeLog: * gcc.target/i386/pr116274.c: New test. * gcc.target/i386/pr113560.c: Scan either mulq or mulx.
