https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87717
Bug ID: 87717 Summary: [9 Regression] FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3 Product: gcc Version: 9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: hjl.tools at gmail dot com CC: segher at gcc dot gnu.org Target Milestone: --- Target: x86-64 On x86-64, r265398 caused: FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3 Before: f1: .LFB0: .cfi_startproc movl %edi, -4(%rsp) vmovd -4(%rsp), %xmm16 movl %esi, -4(%rsp) vmovd -4(%rsp), %xmm17 vpunpckldq %xmm17, %xmm16, %xmm3 ret .cfi_endproc .LFE0: .size f1, .-f1 After: f1: .LFB0: .cfi_startproc movl %edi, -4(%rsp) vmovd -4(%rsp), %xmm16 movl %esi, -4(%rsp) vmovd -4(%rsp), %xmm17 vmovd %xmm17, %eax vmovdqa32 %zmm16, %zmm0 vmovd %xmm16, -4(%rsp) vpinsrd $1, %eax, %xmm0, %xmm3 ret .cfi_endproc .LFE0: .size f1, .-f1