SKIP: FAILED

#include <metal_stdlib>
using namespace metal;

thread half3 u = half3(1.0h);
void f() {
  float3 const v = float3(u);
}
program_source:4:14: error: program scope variable must reside in constant address space
thread half3 u = half3(1.0h);
             ^
program_source:6:16: warning: unused variable 'v' [-Wunused-variable]
  float3 const v = float3(u);
               ^