[PATCH] D46278: [AArch64] Fold B = csel A, A into B = COPY A

[Francis Visoiu Mistrih via Phabricator via llvm-commits]

thegameg updated this revision to Diff 167927.
thegameg added a reviewer: MatzeB.
thegameg added a comment.

- Fixed bugs where physregs were involved and were treated as having an unique def.
- Added more tests.
- Try harder to check the registers by looking through all the vregs until a physreg is found. Then compare definitions or check if it's part of the liveins list.


https://reviews.llvm.org/D46278

Files:
  lib/Target/AArch64/AArch64InstrFormats.td
  lib/Target/AArch64/AArch64InstrInfo.cpp
  lib/Target/AArch64/AArch64InstrInfo.h
  test/CodeGen/AArch64/csel-same-source.mir

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