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[Bug target/79709] Subobtimal code with -mavx and explicit vector
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 29 Sep 2017 21:28:56 +0000
- Subject: [Bug target/79709] Subobtimal code with -mavx and explicit vector
- Auto-submitted: auto-generated
- References: <bug-79709-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79709
--- Comment #8 from Marc Glisse <glisse at gcc dot gnu.org> ---
Thomas, the code generated by gcc has changed (after some patches by Jakub
IIRC). Do you consider the issue fixed or is the generated asm still
problematic?
.L13:
vpextrq $1, %xmm2, %rax
testq %rax, %rax
je .L2
vextractf128 $0x1, %ymm2, %xmm2
vmovq %xmm2, %rax
testq %rax, %rax
jne .L2
vpextrq $1, %xmm2, %rax
vmovapd %ymm4, %ymm3
testq %rax, %rax
jne .L2
.L3:
vmulpd %ymm3, %ymm3, %ymm4
vmulpd %ymm8, %ymm3, %ymm3
vsubpd %ymm10, %ymm4, %ymm4
vmulpd %ymm9, %ymm3, %ymm3
vaddpd %ymm0, %ymm4, %ymm4
vaddpd %ymm1, %ymm3, %ymm9
vaddpd %ymm4, %ymm4, %ymm2
vmulpd %ymm9, %ymm9, %ymm10
vaddpd %ymm10, %ymm2, %ymm2
vcmpltpd %ymm7, %ymm2, %ymm2
vpaddq %xmm2, %xmm5, %xmm3
vextractf128 $1, %ymm2, %xmm6
vmovq %xmm2, %rax
vextractf128 $1, %ymm5, %xmm5
testq %rax, %rax
vpaddq %xmm6, %xmm5, %xmm5
vinsertf128 $0x1, %xmm5, %ymm3, %ymm5
jne .L13