mirror of
https://gitlab.winehq.org/wine/vkd3d.git
synced 2024-11-21 16:46:41 -08:00
c2a7a40d3a
If a hlsl_ir_load loads a variable whose components are stored from different
instructions, copy propagation doesn't replace it.
But if all these instructions are constants (which currently is the case
for value constructors), the load could be replaced with a constant value.
Which is expected in some other instructions, e.g. texel_offsets when
using aoffimmi modifiers.
For instance, this shader:
```
sampler s;
Texture2D t;
float4 main() : sv_target
{
return t.Gather(s, float2(0.6, 0.6), int2(0, 0));
}
```
results in the following IR before applying the patch:
```
float | 6.00000024e-01
float | 6.00000024e-01
uint | 0
| = (<constructor-2>[@4].x @2)
uint | 1
| = (<constructor-2>[@6].x @3)
float2 | <constructor-2>
int | 0
int | 0
uint | 0
| = (<constructor-5>[@11].x @9)
uint | 1
| = (<constructor-5>[@13].x @10)
int2 | <constructor-5>
float4 | gather_red(resource = t, sampler = s, coords = @8, offset = @15)
| return
| = (<output-sv_target0> @16)
```
and this IR afterwards:
```
float2 | {6.00000024e-01 6.00000024e-01 }
int2 | {0 0 }
float4 | gather_red(resource = t, sampler = s, coords = @2, offset = @3)
| return
| = (<output-sv_target0> @4)
```
52 lines
842 B
Plaintext
52 lines
842 B
Plaintext
[require]
|
|
shader model >= 4.0
|
|
|
|
[texture 0]
|
|
size (3, 3)
|
|
0 0 0 1 1 0 0 1 2 0 0 1
|
|
0 1 0 1 1 1 0 1 2 1 0 1
|
|
0 2 0 1 1 2 0 1 2 2 0 1
|
|
|
|
|
|
[pixel shader]
|
|
Texture2D t;
|
|
|
|
float4 main(float4 pos : sv_position) : sv_target
|
|
{
|
|
return t.Load(int3(pos.xy, 0), int2(0, 1));
|
|
}
|
|
|
|
|
|
[test]
|
|
draw quad
|
|
probe (0, 0) rgba (0, 1, 0, 1)
|
|
probe (1, 0) rgba (1, 1, 0, 1)
|
|
probe (0, 1) rgba (0, 2, 0, 1)
|
|
probe (1, 1) rgba (1, 2, 0, 1)
|
|
|
|
|
|
[pixel shader]
|
|
Texture2D t;
|
|
|
|
float4 main(float4 pos : sv_position) : sv_target
|
|
{
|
|
return t.Load(int3(pos.xy, 0), int2(-2, 0));
|
|
}
|
|
|
|
|
|
[test]
|
|
draw quad
|
|
probe (3, 0) rgba (1, 0, 0, 1)
|
|
probe (4, 0) rgba (2, 0, 0, 1)
|
|
probe (3, 1) rgba (1, 1, 0, 1)
|
|
probe (4, 1) rgba (2, 1, 0, 1)
|
|
|
|
|
|
[pixel shader fail]
|
|
Texture2D t;
|
|
|
|
float4 main(float4 pos : sv_position) : sv_target
|
|
{
|
|
return t.Load(int3(pos.xy, 0), int2(8, 1));
|
|
}
|