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8fc640b256
The pass converts:
...
%.. = load_deref(input)
to:
temp = copy_deref(input) // beginning of the shader
...
%.. = load_deref(temp)
If interp_deref_at_* occurs between copy_deref and load_deref,
the interp_deref_at_* lowering overwrites temp, so all future
load_deref(temp) return the result of interp_deref_at_* instead of
copy_deref, which is incorrect.
The issue manifests when the same input is used by both load_deref
and interp_deref_at_* in the same shader and when interp_deref_at_*
happens to be before load_deref.
This fixes it by using a completely new temporary for each instance
of interp_deref_at_*.
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32344>
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| .. | ||
| clc | ||
| glsl | ||
| isaspec | ||
| nir | ||
| rust | ||
| spirv | ||
| builtin_types.py | ||
| builtin_types_c.py | ||
| builtin_types_h.py | ||
| glsl_types.c | ||
| glsl_types.h | ||
| meson.build | ||
| shader_enums.c | ||
| shader_enums.h | ||
| shader_info.h | ||