[PATCH] D62783: [DAG] isBitwiseNot / isConstOrConstSplat - add support for build vector undefs + truncation (PR41020)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 202590.
RKSimon added a comment.

assert that the build vector elements are same size / truncated

avoid temp APInt by using APInt::countTrailingOnes() instead of truncating to call isAllOnesValue()


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62783/new/

https://reviews.llvm.org/D62783

Files:
  include/llvm/CodeGen/SelectionDAGNodes.h
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  test/CodeGen/AArch64/sat-add.ll

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