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Commit d9ca3d97 authored by Craig Topper's avatar Craig Topper
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[AVX-512] Simplify X86InstrInfo::copyPhysReg for 128/256-bit vectors with... 

[AVX-512] Simplify X86InstrInfo::copyPhysReg for 128/256-bit vectors with AVX512, but not VLX. We should use the VEX opcodes and trust the register allocator to not use the extended XMM/YMM register space.

Previously we were extending to copying the whole ZMM register. The register allocator shouldn't use XMM16-31 or YMM16-31 in this configuration as the instructions to spill them aren't available.

llvm-svn: 280648
parent 87a675be
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