Mike Blumenkrantz 5d81698c55 zink: adjust swizzled deref loads by the variable component offset
this code is intended to transform a block like:

```
  32    %306 = @load_interpolated_input (%34, %0 (0x0)) (base=3, component=2, dest_type=float32, io location=VARYING_SLOT_VAR3 slots=1)
  32x2  %307 = fsub %305, %306.xx
```

into derefs. the existing code generates this:

```
decl_var shader_in INTERP_MODE_NONE none vec2 #7 (VARYING_SLOT_VAR3.zw, 0, 0)
  32    %516 = deref_var &#7 (shader_in vec2)
  32x2  %517 = @load_deref (%516) (access=none)
  32    %518 = mov %517.z
error: src->swizzle[i] < num_components (../src/compiler/nir/nir_validate.c:216)
```

the problem is attempting to reapply the component offset to a variable which is
already at an offset

fixes #10567

Fixes: 17a35412dc ("zink: re-rework i/o variable handling to make having variables entirely optional")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27522>
(cherry picked from commit 0a243a7241)
2024-02-14 18:35:58 +00:00
2022-11-22 19:04:13 +00:00
2024-02-01 01:10:50 +00:00
2023-10-25 15:29:22 +00:00
2022-01-19 15:17:17 +00:00
2022-11-21 23:09:30 +00:00
2024-02-01 01:00:16 +00:00

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


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------

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---------------

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