[PATCH] D132939: [TwoAddressInstruction] rewrite INSERT_SUBREG to SUBREG_TO_REG if upper bits zero

[Allen zhong via Phabricator via llvm-commits]

Allen created this revision.
Allen added reviewers: foad, arsenm, efriedma, paulwalker-arm.
Herald added subscribers: mstorsjo, pengfei, hiraditya.
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Restrict the 32-bit form of an instruction of integer as too many test cases
will be clobber as the register number updated.


https://reviews.llvm.org/D132939

Files:
  llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
  llvm/test/CodeGen/AArch64/atomicrmw-O0.ll
  llvm/test/CodeGen/X86/bitcast-setcc-128.ll

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