Only reuse an already existing ImplicitCastExpr if the cast kinds are the same.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81841 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 4 deletions

diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 474ea16e57..5a31296781 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -230,10 +230,14 @@ void Sema::ImpCastExprToType(Expr *&Expr, QualType Ty,
   }
 
   if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr)) {
-    ImpCast->setType(Ty);
-    ImpCast->setLvalueCast(isLvalue);
-  } else
-    Expr = new (Context) ImplicitCastExpr(Ty, Kind, Expr, isLvalue);
+    if (ImpCast->getCastKind() == Kind) {
+      ImpCast->setType(Ty);
+      ImpCast->setLvalueCast(isLvalue);
+      return;
+    }
+  }
+
+  Expr = new (Context) ImplicitCastExpr(Ty, Kind, Expr, isLvalue);
 }
 
 void Sema::DeleteExpr(ExprTy *E) {