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[spirv-val] OpConstantNull refused for OpExtInst DebugTypeBasic #5897

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Keenuts opened this issue Nov 28, 2024 · 0 comments
Open

[spirv-val] OpConstantNull refused for OpExtInst DebugTypeBasic #5897

Keenuts opened this issue Nov 28, 2024 · 0 comments
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component:validation

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@Keenuts
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Keenuts commented Nov 28, 2024

Hello!

Not sure if this is a validation issue, or a spec issue, or a desirable behavior, but if I do:

%flag = OpConstantNull %uint
        OpExtInst %void %-- DebugTypeBasic %-- %-- %-- %flag

I get a validation error because %flag is not an OpConstant.
This matches the spec which only mentions OpConstant.

Question is shall OpConstantNull %uint be considered to be the same as OpConstant %uint 0?
Or is that difference there by design?

(related to #5846 and llvm/llvm-project#118011)
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@Keenuts