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[Bug target/71346] New: [AVX-512] AVX-512VL insn emitted when it is disabled
- From: "kyukhin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 30 May 2016 13:12:04 +0000
- Subject: [Bug target/71346] New: [AVX-512] AVX-512VL insn emitted when it is disabled
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71346
Bug ID: 71346
Summary: [AVX-512] AVX-512VL insn emitted when it is disabled
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: kyukhin at gcc dot gnu.org
Target Milestone: ---
Testcase attached.
Started from Jakub's r235968.
Reproduce:
./cc1 1.c -dp -m64 -march=knl -Ofast -quiet -o repro.s 2>/dev/null ; cat
repro.s |grep shufps |grep xmm17
Those insns belong to AVX-512VL:
vshufps $255, %xmm15, %xmm15, %xmm17 # 680
sse_shufps_v4sf/2 [length = 7]
vshufps $85, %xmm12, %xmm12, %xmm17 # 682
sse_shufps_v4sf/2 [length = 7]