[PATCH] Patch to fix the AST for vector splat from any

arithmetic type to a vector so that the arithmatic type
matches the vector element type. Without which it crashes
in Code Gen. rdar://20000762

llvm-svn: 231419

1 files changed, 12 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
index 6ad0b24275a..29e5150073d 100644
--- a/clang/lib/Sema/SemaExprCXX.cpp
+++ b/clang/lib/Sema/SemaExprCXX.cpp
@@ -3000,8 +3000,18 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
     break;
 
   case ICK_Vector_Splat:
-    From = ImpCastExprToType(From, ToType, CK_VectorSplat, 
-                             VK_RValue, /*BasePath=*/nullptr, CCK).get();
+    // Vector splat from any arithmetic type to a vector.
+    // Cast to the element type.
+    {
+      QualType elType = ToType->getAs<ExtVectorType>()->getElementType();
+      if (elType != From->getType()) {
+        ExprResult E = From;
+        From = ImpCastExprToType(From, elType,
+                                 PrepareScalarCast(E, elType)).get();
+      }
+      From = ImpCastExprToType(From, ToType, CK_VectorSplat,
+                               VK_RValue, /*BasePath=*/nullptr, CCK).get();
+    }
     break;
 
   case ICK_Complex_Real: