[llvm] SystemZ: Implement copyPhysReg between vr128 and gr128 (PR #90616)
Jonas Paulsson via llvm-commits
llvm-commits at lists.llvm.org
Wed May 1 02:58:24 PDT 2024
JonPsson1 wrote:
I am a little confused: If only 64-bits (one GPR) is defined and inserted, I would have thought a vector element load (VLVGG) would be used, but that would be something like a COPY from GR64 to VR64, except VR64 does not hold i64.
Is it allowed to add an undef implicit use to the COPY source for the undef part..?
copy_gr128_to_vr128__r0q_to_v0_undef: COPY undef $r0q: maybe don't put r0q in the liveins list?
https://github.com/llvm/llvm-project/pull/90616
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