Allow initializing a vector with a vector in addition to allowing a list

of the elements.  Issue reported on cfe-dev by Mattias Holm.

llvm-svn: 73292

clang/lib/Sema/SemaInit.cpp

@@ -674,7 +674,7 @@ void InitListChecker::CheckSubElementType(InitListExpr *IList,
       //   compatible structure or union type. In the latter case, the
       //   initial value of the object, including unnamed members, is
       //   that of the expression.
-      if (ElemType->isRecordType() &&
+      if ((ElemType->isRecordType() || ElemType->isVectorType()) &&
           SemaRef.Context.hasSameUnqualifiedType(expr->getType(), ElemType)) {
         UpdateStructuredListElement(StructuredList, StructuredIndex, expr);
         ++Index;

clang/test/Sema/init-vector.c

@@ -0,0 +1,17 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+typedef float __attribute__((vector_size (16))) v4f_t;
+
+typedef union {
+    struct {
+        float x, y, z, w;
+    }s;
+    v4f_t v;
+} vector_t;
+
+
+vector_t foo(v4f_t p)
+{
+  vector_t v = {.v = p};
+  return v;
+}