1 files changed, 37 insertions, 0 deletions
diff --git a/test/Sema/ext_vector_components.c b/test/Sema/ext_vector_components.c
new file mode 100644
index 000000000000..422a9e6f2287
--- /dev/null
+++ b/test/Sema/ext_vector_components.c
@@ -0,0 +1,37 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+typedef __attribute__(( ext_vector_type(2) )) float float2;
+typedef __attribute__(( ext_vector_type(3) )) float float3;
+typedef __attribute__(( ext_vector_type(4) )) float float4;
+
+static void test() {
+    float2 vec2, vec2_2;
+    float3 vec3;
+    float4 vec4, vec4_2, *vec4p;
+    float f;
+
+    vec2.z; // expected-error {{vector component access exceeds type 'float2'}}
+    vec2.xyzw; // expected-error {{vector component access exceeds type 'float2'}}
+    vec4.xyzw; // expected-warning {{expression result unused}}
+    vec4.xyzc; // expected-error {{illegal vector component name 'c'}}
+    vec4.s01z; // expected-error {{illegal vector component name 'z'}}
+    vec2 = vec4.s01; // legal, shorten
+    
+    vec3 = vec4.xyz; // legal, shorten
+    f = vec2.x; // legal, shorten
+    f = vec4.xy.x; // legal, shorten
+
+    vec2 = vec3.hi; // expected-error {{vector component access invalid for odd-sized type 'float3'}}
+    
+    vec4_2.xyzx = vec4.xyzw; // expected-error {{vector is not assignable (contains duplicate components)}}
+    vec4_2.xyzz = vec4.xyzw; // expected-error {{vector is not assignable (contains duplicate components)}}
+    vec4_2.xyyw = vec4.xyzw; // expected-error {{vector is not assignable (contains duplicate components)}}
+    vec2.x = f;
+    vec2.xx = vec2_2.xy; // expected-error {{vector is not assignable (contains duplicate components)}}
+    vec2.yx = vec2_2.xy;
+    vec4 = (float4){ 1,2,3,4 };
+    vec4.xy.w; // expected-error {{vector component access exceeds type 'float2'}}
+    vec4.s06; // expected-error {{vector component access exceeds type 'float4'}}
+  
+    vec4p->yz = vec4p->xy;
+}