[PATCH] D44442: [X86] Teach X86TargetLowering::targetShrinkDemandedConstant to set non-demanded bits if it helps created an and mask that can be matched as a zero extend.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel.

Fixes PR36689.


Repository:
  rL LLVM

https://reviews.llvm.org/D44442

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/pr12360.ll
  test/CodeGen/X86/pr32284.ll
  test/CodeGen/X86/zext-demanded.ll

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