[PATCH] D91450: [BPI] Look through bitcasts in calcZeroHeuristic

[Wei Wang via Phabricator via llvm-commits]

weiwang created this revision.
Herald added subscribers: llvm-commits, wenlei, hiraditya.
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weiwang requested review of this revision.

Constant hoisting may hide the constant value behind bitcast for And's
operand. Track down the constant.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D91450

Files:
  llvm/lib/Analysis/BranchProbabilityInfo.cpp


Index: llvm/lib/Analysis/BranchProbabilityInfo.cpp
===================================================================
--- llvm/lib/Analysis/BranchProbabilityInfo.cpp
+++ llvm/lib/Analysis/BranchProbabilityInfo.cpp
@@ -882,7 +882,7 @@
   // we don't have information about probabilities.
   if (Instruction *LHS = dyn_cast<Instruction>(CI->getOperand(0)))
     if (LHS->getOpcode() == Instruction::And)
-      if (ConstantInt *AndRHS = dyn_cast<ConstantInt>(LHS->getOperand(1)))
+      if (ConstantInt *AndRHS = GetConstantInt(LHS->getOperand(1)))
         if (AndRHS->getValue().isPowerOf2())
           return false;
 


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