[PATCH] D27271: [AArch64] Fold more spilled/refilled COPYs.

[Geoff Berry via Phabricator via llvm-commits]

gberry created this revision.
gberry added reviewers: MatzeB, qcolombet.
gberry added a subscriber: llvm-commits.
Herald added subscribers: mcrosier, rengolin, aemerson.

Make AArch64InstrInfo::foldMemoryOperandImpl more general by folding all
full COPYs between register classes of the same size that are either
spilled or refilled.


https://reviews.llvm.org/D27271

Files:
  lib/Target/AArch64/AArch64InstrInfo.cpp
  test/CodeGen/AArch64/spill-fold.ll
  test/CodeGen/AArch64/zero-reg.ll

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