[Git][wine/vkd3d][master] vkd3d-shader/spirv: Avoid emitting duplicate built-in inputs in spirv_compiler_emit_input().

[Henri Verbeet (＠hverbeet)]

Henri Verbeet pushed to branch master at wine / vkd3d

Commits:
8334386d by Henri Verbeet at 2025-08-13T15:54:12+02:00
vkd3d-shader/spirv: Avoid emitting duplicate built-in inputs in spirv_compiler_emit_input().

This works around an issue introduced by commit
66cb2815f0662713c3255113255cfd7cf5e406fb. SV_PRIMITIVE_ID inputs in
geometry shaders use VKD3DSPR_PRIMID registers, and we create the
corresponding SPIR-V inputs using spirv_compiler_emit_io_register().
Unfortunately we also have an input signature element for the same
input, and simply creating another PrimitiveId input would run into
VUID-StandaloneSpirv-OpEntryPoint-09658.

Before the commit mentioned above, we'd use DCL_INPUT instructions to
emit input declarations, and these would help to distinguish whether
VKD3DSPR_INPUT or VKD3DSPR_PRIMID registers were used for primitive ID
inputs. Note that we can't simply ignore input signature element with
SIGNATURE_TARGET_LOCATION_UNUSED; the DXIL parser emits SV_SAMPLE_INDEX
inputs with that target location, but does require them to use a
VKD3DSPR_INPUT register.

- - - - -

2 changed files:

- libs/vkd3d-shader/spirv.c
- libs/vkd3d-shader/vkd3d_shader_private.h

View it on GitLab: https://gitlab.winehq.org/wine/vkd3d/-/commit/8334386d99c720ca52afb67b52c7ef...