Fix review nit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51194 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index 6fb2627321..3699ba1df7 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -1152,7 +1152,8 @@ public:
     return SubExprs[Index];
   }
 
-  int getShuffleMaskIdx(ASTContext &Ctx, unsigned N) {
+  unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) {
+    assert((N < NumExprs - 2) && "Shuffle idx out of range!");
     llvm::APSInt Result(32);
     bool result = getExpr(N+2)->isIntegerConstantExpr(Result, Ctx);
     assert(result && "Must be integer constant");