[PATCH] D67794: [MachineCopyPropagation] Extend MCP to do trivial copy backward propagation

[Kai Luo via Phabricator via llvm-commits]

lkail updated this revision to Diff 231488.
lkail added a comment.

Rebased and fixed broken tests. Ready to be reviewed.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D67794/new/

https://reviews.llvm.org/D67794

Files:
  llvm/lib/CodeGen/MachineCopyPropagation.cpp
  llvm/test/CodeGen/PowerPC/machine-backward-cp.mir
  llvm/test/CodeGen/PowerPC/redundant-copy-after-tail-dup.ll
  llvm/test/CodeGen/RISCV/alu64.ll
  llvm/test/CodeGen/RISCV/shifts.ll
  llvm/test/CodeGen/X86/fp128-i128.ll
  llvm/test/CodeGen/X86/fshr.ll
  llvm/test/CodeGen/X86/i128-mul.ll
  llvm/test/CodeGen/X86/mul-i512.ll
  llvm/test/CodeGen/X86/shift-i128.ll
  llvm/test/CodeGen/X86/umulo-128-legalisation-lowering.ll

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