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

[Kai Luo via Phabricator via llvm-commits]

lkail updated this revision to Diff 229460.
lkail added a reviewer: shiva0217.
lkail added a comment.
Herald added subscribers: apazos, sameer.abuasal, pzheng, s.egerton, lenary, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb.

Address @qcolombet's comment. @qcolombet I have no idea which is preferable to pass `EnableBackwardCP` option, target hook or `cl::opt`?


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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D67794.229460.patch
Type: text/x-patch
Size: 22780 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20191115/d79ce10f/attachment.bin>