[PATCH] D62266: [DAGCombine][X86][AArch64][ARM] (C - x) + y -> (y - x) + C fold

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 202313.
lebedev.ri added a comment.

ping @efriedma.

Rebased, fixed endless combine loop (by not hoisting if constant is opaque, since we don't constant-fold those).


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62266/new/

https://reviews.llvm.org/D62266

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/AArch64/shift-amount-mod.ll
  test/CodeGen/AArch64/sink-addsub-of-const.ll
  test/CodeGen/ARM/addsubcarry-promotion.ll
  test/CodeGen/X86/shift-amount-mod.ll
  test/CodeGen/X86/sink-addsub-of-const.ll

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