[PATCH] D57302: [DAGCombine] More diamond carry pattern optimization.

Sat May 4 04:27:32 PDT 2019

deadalnix updated this revision to Diff 198135.
deadalnix added a comment.

Rebase and ping.

While I understand one may have doubts about this patch, it is absolutely key to push the quality of the canonicalisation of large interegers further. With a dual track for carry propapagtion, it is not possible to to do any better than we do now.

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57302/new/

https://reviews.llvm.org/D57302

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/addcarry.ll
  test/CodeGen/X86/subcarry.ll

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