microsoft / microsoft/DirectXShaderCompiler

[SPIR-V] Invalid handling of vk::ext_decorate with Location, BuiltIn decorations

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#7,970 0 comments 1 reaction 1 assignee View on GitHub

@Keenuts is already working on this.

Since Dec 4, 2025.

bug spirv
Dominant language
C++
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Description

Inline SPIR-V provides multiple ways to declare a builtin input:

the shortcut: vk::ext_builtin_input
the tedious way: vk::ext_decorate + vk::ext_storage_class

Issue is DXC is not considering the user going through the tedious way, but the shortcut should in fact be seen as a shortcut, not the only valid solution.

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