ConstantFold - silence static analyzer dyn_cast<> null dereference warning. NFCI.

Early out if the vector element is not Constant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372743 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/IR/ConstantFold.cpp b/lib/IR/ConstantFold.cpp
index 835fbb3443b8fb8be02c870cef634f5a340cca1b..ee0ad322f4edc67bf4f374524f65bc2afb998b59 100644 (file)
--- a/lib/IR/ConstantFold.cpp
+++ b/lib/IR/ConstantFold.cpp
@@ -747,6 +747,7 @@ Constant *llvm::ConstantFoldSelectInstruction(Constant *Cond,
       Constant *V2Element = ConstantExpr::getExtractElement(V2,
                                                     ConstantInt::get(Ty, i));
       Constant *Cond = dyn_cast<Constant>(CondV->getOperand(i));
+      if (!Cond) break;
       if (V1Element == V2Element) {
         V = V1Element;
       } else if (isa<UndefValue>(Cond)) {