[all-commits] [llvm/llvm-project] 327934: [BPI] Look through bitcasts in calcZeroHeuristic

[Wei Wang via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 3279347da05e590c970b37540d7e3ac873ae3e1d
      https://github.com/llvm/llvm-project/commit/3279347da05e590c970b37540d7e3ac873ae3e1d
  Author: Wei Wang <apollo.mobility at gmail.com>
  Date:   2020-11-17 (Tue, 17 Nov 2020)

  Changed paths:
    M llvm/lib/Analysis/BranchProbabilityInfo.cpp
    A llvm/test/Analysis/BranchProbabilityInfo/hoist.ll

  Log Message:
  -----------
  [BPI] Look through bitcasts in calcZeroHeuristic

Constant hoisting may hide the constant value behind bitcast for And's
operand. Track down the constant to make the BFI result consistent
regardless of hoisting.

Differential Revision: https://reviews.llvm.org/D91450