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This is prohibited by the GLSL ES spec: "In addition, all identifiers containing two consecutive underscores (__) are reserved for use by underlying software layers. Defining such a name in a shader does not itself result in an error, but may result in unintended behaviors that stem from having multiple definitions of the same name." (https://registry.khronos.org/OpenGL/specs/es/3.1/GLSL_ES_Specification_3.10.withchanges.pdf, section 3.7). However, while glslang validation will not give an error on this, NVidia ES drivers will. So I've added a Dawn end2end test instead of a WGSL test. Bug: tint:1944 Change-Id: I4b965af00039ca7a232bc11be884483f8e02ccf6 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/134140 Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Stephen White <senorblanco@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> |
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