[llvm] r373321 - ConstantFold - ConstantFoldSelectInstruction - assume constant vector elements are constant. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Tue Oct  1 03:22:01 2019
New Revision: 373321

URL: http://llvm.org/viewvc/llvm-project?rev=373321&view=rev
Log:
ConstantFold - ConstantFoldSelectInstruction - assume constant vector elements are constant. NFCI.

Goes a bit further than rL372743 which added the early out - elements should be Constant so use cast<Constant> instead (and rely on the assert if anything fails).

Modified:
    llvm/trunk/lib/IR/ConstantFold.cpp

Modified: llvm/trunk/lib/IR/ConstantFold.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/ConstantFold.cpp?rev=373321&r1=373320&r2=373321&view=diff
==============================================================================
--- llvm/trunk/lib/IR/ConstantFold.cpp (original)
+++ llvm/trunk/lib/IR/ConstantFold.cpp Tue Oct  1 03:22:01 2019
@@ -746,8 +746,7 @@ Constant *llvm::ConstantFoldSelectInstru
                                                     ConstantInt::get(Ty, i));
       Constant *V2Element = ConstantExpr::getExtractElement(V2,
                                                     ConstantInt::get(Ty, i));
-      Constant *Cond = dyn_cast<Constant>(CondV->getOperand(i));
-      if (!Cond) break;
+      auto *Cond = cast<Constant>(CondV->getOperand(i));
       if (V1Element == V2Element) {
         V = V1Element;
       } else if (isa<UndefValue>(Cond)) {