diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 63cd256dc5..797b2b8db2 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -4934,6 +4934,12 @@ static bool CanEvaluateInDifferentType(Value *V, const Type *Ty, // If this is a cast from the destination type, we can trivially eliminate // it, and this will remove a cast overall. if (I->getOperand(0)->getType() == Ty) { + // If the first operand is itself a cast, and is eliminable, do not count + // this as an eliminable cast. We would prefer to eliminate those two + // casts first. + if (CastInst *OpCast = dyn_cast<CastInst>(I->getOperand(0))) + return true; + ++NumCastsRemoved; return true; } |