https://bugs.llvm.org/show_bug.cgi?id=34876
Bug ID: 34876
Summary: [X86] Should we prefer AVX VBLENDPS/VBLENDPS over
VMOVSS/VMOVSD even with AVX512?
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
There are no EVEX versions of VBLENDPS/VBLENDPD so when AVX512 is enabled we
prefer EVEX VMOVSS/VMOVSD. This enables us to use the XMM16-XMM31 registers,
but the BLEND instructions have better throughput and that may outweight the
increased register freedom.
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