Expound upon this comparison!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124406 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/MergeFunctions.cpp b/lib/Transforms/IPO/MergeFunctions.cpp
index 9abb99d..d8eddab 100644
--- a/lib/Transforms/IPO/MergeFunctions.cpp
+++ b/lib/Transforms/IPO/MergeFunctions.cpp
@@ -468,6 +468,8 @@
if (C1->isNullValue() && C2->isNullValue() &&
isEquivalentType(C1->getType(), C2->getType()))
return true;
+ // Try bitcasting C2 to C1's type. If the bitcast is legal and returns C1
+ // then they must have equal bit patterns.
return C1->getType()->canLosslesslyBitCastTo(C2->getType()) &&
C1 == ConstantExpr::getBitCast(const_cast<Constant*>(C2), C1->getType());
}