fix PR10395 - array decay can produce an interesting type when

decaying an array of incomplete type (which has type [0 x i8]*) to a
normal pointer (which has incompletetype*).

llvm-svn: 135565

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 37d424a2b35..f64e98ef684 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -1075,7 +1075,10 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
       V = Builder.CreateStructGEP(V, 0, "arraydecay");
     }
 
-    return V;
+    // Make sure the array decay ends up being the right type.  This matters if
+    // the array type was of an incomplete type.
+    return CGF.Builder.CreateBitCast(V, 
+                              CGF.getTypes().ConvertTypeForMem(CE->getType()));
   }
   case CK_FunctionToPointerDecay:
     return EmitLValue(E).getAddress();