Re: [PATCH 0/4] MR51: vkd3d-shader/hlsl: Improve constant handling in copy prop, and extend the use of aoffimmi modifiers.

[Francisco Casas (＠fcasas)]

### The swizzle issue

(a) in its current form is not addressing swizzles.

Consider the following shader:

```
Texture2D t;
uniform int i;

float4 main() : sv_target
{
    int3 a = {1, 2, i};
    return t.Load(int3(0, 1, 2), a.xy);
}
```

even with (a), this results in:

```
   2:        int | i
   3:        int | 1 
   4:       uint | 0 
   5:            | = (a[@4].x @3)
   6:        int | 2 
   7:       uint | 1 
   8:            | = (a[@7].x @6)
   9:       uint | 2 
  10:            | = (a[@9].x @2)
  11:       int3 | {0 1 2 }
  12:       int3 | a
  13:       int2 | @12.xy
  14:     float4 | load_resource(resource = t, sampler = (nil), coords = @11, offset = @13)
  15:            | return
  16:            | = (<output-sv_target0> @14)
```

and the offset cannot be resolved as a constant int2.

This may be a good reason to also include (b) + (d)

-- 
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/51#note_17278