[PATCH] Pass aggregate arguments by value in NVPTX

[Eli Bendersky]

================
Comment at: test/CodeGen/nvptx-abi.c:9
@@ +8,3 @@
+float4_t my_function(void) {
+// CHECK: define %struct.float4_s @my_function
+  float4_t t;
----------------
Makes sense to put a CHECK-LABEL here too?

http://reviews.llvm.org/D6020