[Root Signatures] Fix default values for Descriptor Range Flags and Root Descriptor Flags in Version 1 #297
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inbelic
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Jun 18, 2025
inbelic
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Jun 24, 2025
joaosaffran
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bogner
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inbelic
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Jun 25, 2025
| @@ -461,7 +461,10 @@ As specified in the grammar, '0' denotes there are no flags set. | |||
| - `RootFlags = 0` | |||
| - `ROOT_DESCRIPTOR_FLAGS` and `DESCRIPTOR_RANGE_FLAGS` | |||
| - Version 1.0: | |||
| - `DATA_VOLATILE` | |||
| - `CBV`: `DATA_VOLATILE | DESCRIPTORS_VOLATILE` | |||
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These should also be split into the different flag types. DESCRIPTORS_VOLATILE isn't a valid ROOT_DESCRIPTOR_FLAG
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…gnature Version (#145828) This pr updates `setDefaultFlags` in `HLSLRootSignature.h` to account for which version it should initialize the default flag values for. - Updates `setDefaultFlags` with a `Version` argument and initializes them to be compliant as described [here](llvm/wg-hlsl#297). - Updates `RootSignatureParser` to retain the `Version` and pass this into `setDefaultFlags` - Updates all uses of `setDefaultFlags` in test-cases - Adds some new unit testing to ensure behaviour is as expected and that the Parser correctly passes down the version Resolves #145820.
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…for Root Signature Version (#145828) This pr updates `setDefaultFlags` in `HLSLRootSignature.h` to account for which version it should initialize the default flag values for. - Updates `setDefaultFlags` with a `Version` argument and initializes them to be compliant as described [here](llvm/wg-hlsl#297). - Updates `RootSignatureParser` to retain the `Version` and pass this into `setDefaultFlags` - Updates all uses of `setDefaultFlags` in test-cases - Adds some new unit testing to ensure behaviour is as expected and that the Parser correctly passes down the version Resolves llvm/llvm-project#145820.
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…nature` (#147111) This pr resolves some discrepancies in verification during `validate` in `DXILRootSignature.cpp`. Note: we don't add a backend test for version 1.0 flag values because it treats the struct as though there is no flags value. However, this will be used when we use the verifications in the frontend. - Updates `verifyDescriptorFlag` to check for valid flags based on version, as reflected [here](llvm/wg-hlsl#297) - Add test to demonstrate updated flag verifications - Adds `verifyNumDescriptors` to the validation of `DescriptorRange`s - Add a test to demonstrate `numDescriptors` verification - Updates a number of tests that mistakenly had an invalid `numDescriptors` specified Resolves: #147107
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Jul 9, 2025
…DXILRootSignature` (#147111) This pr resolves some discrepancies in verification during `validate` in `DXILRootSignature.cpp`. Note: we don't add a backend test for version 1.0 flag values because it treats the struct as though there is no flags value. However, this will be used when we use the verifications in the frontend. - Updates `verifyDescriptorFlag` to check for valid flags based on version, as reflected [here](llvm/wg-hlsl#297) - Add test to demonstrate updated flag verifications - Adds `verifyNumDescriptors` to the validation of `DescriptorRange`s - Add a test to demonstrate `numDescriptors` verification - Updates a number of tests that mistakenly had an invalid `numDescriptors` specified Resolves: llvm/llvm-project#147107
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This patch is updating the spec to match DXC behaviour for Descriptor Ranges flags serialization on root signatures version 1.
DXC: https://github.com/microsoft/DirectXShaderCompiler/blob/d43d909801c185e5bad11a683a970cd23957c3c9/lib/DxilRootSignature/DxilRootSignature.cpp#L118