1export fn a() void {
 2    var x: *i32 = undefined;
 3    _ = &x;
 4    var y: *i32 = undefined;
 5    _ = &y;
 6    var rt_cond = false;
 7    _ = &rt_cond;
 8
 9    var z = if (rt_cond) x else y;
10    _ = &z;
11}
12
13// error
14// target=spirv64-vulkan
15//
16// :9:13: error: value with non-mergable pointer type '*i32' depends on runtime control flow
17// :9:17: note: runtime control flow here
18// :9:13: note: pointers with address space 'generic' cannot be returned from a branch on target spirv-vulkan by compiler backend stage2_spirv