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vkd3d-shader/ir: Allow failure in shader_signature_find_element_for_reg().

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shader_signature_find_element_for_reg() is also used in the TPF parser,
where the program has not been validated yet, so it must not crash
on errors.

The I/O normaliser can instead assume that the shader is already
validated.

This fixes a crash with a shader used by The Falconeer. The bug is still
present, because the shader will be incorrectly rejected, but at least
the vkd3d-shader will fail gracefully.
This commit is contained in:
Giovanni Mascellani
2024-09-16 16:11:11 +02:00
committed by Henri Verbeet
parent 32ced3bd8f
commit 637a3cabe7
Notes: Henri Verbeet 2024-09-20 17:31:34 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1089
3 changed files with 45 additions and 14 deletions
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libs/vkd3d-shader/vkd3d_shader_private.h
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@@ -80,6 +80,7 @@ enum vkd3d_shader_error
VKD3D_SHADER_ERROR_TPF_INVALID_CASE_VALUE = 1007,
VKD3D_SHADER_ERROR_TPF_INVALID_REGISTER_DIMENSION = 1008,
VKD3D_SHADER_ERROR_TPF_INVALID_REGISTER_SWIZZLE = 1009,
VKD3D_SHADER_ERROR_TPF_INVALID_REGISTER_DCL = 1010,
VKD3D_SHADER_WARNING_TPF_MASK_NOT_CONTIGUOUS = 1300,
VKD3D_SHADER_WARNING_TPF_UNHANDLED_INDEX_RANGE_MASK = 1301,