[PATCH] D134343: [TwoAddrInst] Emit COPYs for undef REG_SEQUENCE operands if used in inst with early-clobber defs

[Abinav Puthan Purayil via Phabricator via llvm-commits]

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We can have REG_SEQUENCE with IMPLICIT_DEF subregs that are used in
early-clobber instructions. TwoAddrInst should emit a copy for them when
trying to remove the REG_SEQUENCE so that regalloc doesn't assign
overlapping registers.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134343

Files:
  llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
  llvm/test/CodeGen/AMDGPU/twoaddr-mad-gfx11.mir
  llvm/test/CodeGen/Thumb2/mve-laneinterleaving-cost.ll
  llvm/test/CodeGen/Thumb2/mve-satmul-loops.ll

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