[PATCH] D5591: AArch64: Fold immediate into the immediate field of logical instructions

[Akira Hatanaka via llvm-commits]

ahatanak updated this revision to Diff 71888.
ahatanak added a comment.

Rebase and make a couple of changes:

- Add comments.
- In optimizeLogicalImm, return false instead of true when the immediate is already a bimm32 or bimm64 so that it doesn't inhibit the optimization done later in AArch64ISelDAGToDAG.cpp that emits BFXIL.
- Remove redundant instructions in bitreverse.ll.


https://reviews.llvm.org/D5591

Files:
  include/llvm/Target/TargetLowering.h
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.h
  test/CodeGen/AArch64/bitreverse.ll
  test/CodeGen/AArch64/optimize-imm.ll

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