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* Explicit swapchain interface in `gfx`.
* Correctly return nullptr when `IRenderer` creation failed.
* Fix crashes on CUDA tests.
* Cleanups.
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* Make gfx library visible to external user.
* Fixup
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This change kind of rolls together two different simplifications:
1. The `createShaderObject()` shouldn't really need to take an `IShaderObjectLayout` because it could just take the `slang::TypeLayoutReflection` instead and create the shader-object layout behind the scenes.
2. For that matter, it needn't take a `slang::TypeLayoutReflection` either, becaues it could just take a `slang::TypeReflection` and query the layout of that type behind the scenes.
The combination of these two changes means:
* `IShaderObjectLayout` is gone from the public API, as is `createShaderObjectLayout()`
* `createShaderObject()` directly takes a `slang::TypeReflection` and allocates a shader object of that type
The result is simpler and more streamlined application code.
Note that under the hood the implementation still has shader-object layouts, using the `ShaderObjectLayoutBase` class. A few locations had to change to use `RefPtr`s instead of `ComPtr`s now that the class is no longer a public COM-lite API type.
The hope is that this change makes it easier to allocate/cache layouts for things like specialized types "under the hood," as is needed to implement parameter setting for static specialization.
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This change makes it so that the shared shader object implementation across graphics APIs (everything except CUDA and CPU) uses a host-memory buffer to store ordinary (aka "uniform") data while the shader object is being set up / modified, and then allocates and initializes a GPU-memory buffer for the data on-demand once setup is complete.
This choice is a necessary step for supporting interface/existential-type fields in the presence of static specialization, because any fixed-size GPU buffer we would try to allocate at the time an object is first created might not turn out to be large enough if static specialization must handle a concrete type that doesn't "fit" into the fixed-size space reserved for an existential value (resulting in the value having to be placed in an overflow region outside the original object).
This change does *not* include any of the work related to actually laying out existential-type fields in this fashion. It instead just focuses on changing when and where the GPU memory allocation is performed to one that is more appropriate for those subsequent changes.
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* Add `SampleGrad` overload for lod clamp.
* Fix gfx to run the test on vulkan.
* Whitespace change to trigger CI build
* remove presentFrame call in render-test
Co-authored-by: Yong He <yhe@nvidia.com>
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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The purpose of these changes is to make the `shader-object` example work correctly on CUDA.
Originally I had tried to add changes to the "flat" reflection information so that it introduced descriptor ranges to match the binding ranges it added for interface/existential-type fields. This approach helped the CUDA code that was using that information to try and compute uniform offsets for those fields, but it broke most of the other renderer back-ends. Instead, I removed the relevant asserts from `CUDAShaderObject::setObject()`.
Note taht there are leftover changes from my edits to the flat reflection information, around how it handles "leaf" fields that consume multiple resource kinds. I believe that those changes are, on balance, "more correct" now than they were before, so I decided to leave them in.
The other major fix here is to specialize the `CUDAShaderObject::setObject()` logic to handle the case of setting a shader object for a parameter that has interface type instead of a constant-buffer or parameter block. Mostly I just copy bytes from the child object into the parent object. There are a few caveats, though:
* I am not writing the RTTI or witness-table information, so dynamic dispatch won't work.
* I am assuming a hard-coded offset of 16 bytes for the any-value, which will work for now but is a bit too "magical" and might also break once we support conjunctions of interfaces with dynamic dispatch
* I am assuming that the child value to be writen into the field will "fit" into the any-value area. We need some way to determine whether or not things fit dynamically (ideally using the reflection data), and adapt accordingly.
* I had to add another method on the base CUDA shader object type to handle setting data using a device-memory pointr instead of a host-memory pointer
* There's not a lot we can do about it, but in the case of assigning an ordinary `CUDAShaderObject` into an interface-type field of a `CUDAEntryPointShaderObject` we end up needing to perform a device->host memory copy, because the bytes of the value will have already been written to GPU memory, but need to be in GPU memory for the dispatch call.
* The implementation I'm using here basically assumes that the child shader object must have been finalized before it gets plugged into the parent shader object. We haven't yet made a policy decision about that bit.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP: First pass in supporting output of line error information.
* Add support for lexing to better be able to indicate SourceLocation information.
* Fix lexer usage in DiagnosticSink in C++ extractor.
* Update diagnostics tests to have line location info.
* Fixed test expected output that now have source location information in them.
* Better handling of tab.
* Fix test expected results for tabbing change.
* DiagnosticLexer -> DiagnosticSink::SourceLocationLexer
Added line continuation tests.
* Fix typo.
* Added String::appendRepeatedChar
* Change to rerun tests.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix bugs with m_features on Dx12 and gl.
Fix issue about GFX_NVAPI availability.
* Fix handling of SLANG_E_NOT_AVAILABLE on renderer startup.
* Clarify comment.
* Improve comment.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Typo for renderer name for DX12.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP diagnostics for line number output.
* Small param naming change
* Use x macro for pass through compile human name lookup/getting.
* WIP on parsing downstream compiler output.
* Split out parsing into ParseDiagnosticUtil.
Added test result of single line.
* Dump out the std output on fail to parse diagnostics.
* Change test type for syntax-error-intrinsic.slang be TEST not TEST_DIAGNOSTIC
* Use Index for StringUtil.
* WIP: First pass support for parsing Slang diagnostics.
* WIP Testing comparing with ParseDiagnosticUtil with previous ad-hoc mechanism.
* Use the new parsing mechanism for diagnostic comparisons.
* Fix layout on GLSL, doesn't have CR so runs into main.
* Split out switch on outputting intrinsic 'specials'.
Output code around intrinsic as emit - so that we get the appropriate indenting (and potentially other benefits).
* Improvements to diagnostics parsing.
Better error handling, and fallback handling.
Added ability to parse downstream compilers without a prefix.
Added ability to parse Slang with a prefix.
* DownstreamDiagnostic::Type -> Severity and related fixes.
* Small fixes around moving from DownstreamDiagnostic::Type -> Severity
* Fix handling of 'special intrinsic' expansion
* Split out the handling of intrinsic expansion into it's own type and files.
* Fixes to reading expected output - for SimpleLine test.
* Test using += to check #line output.
* A test around += and return.
* Small comment fixes.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP diagnostics for line number output.
* Small param naming change
* Use x macro for pass through compile human name lookup/getting.
* WIP on parsing downstream compiler output.
* Split out parsing into ParseDiagnosticUtil.
Added test result of single line.
* Dump out the std output on fail to parse diagnostics.
* Change test type for syntax-error-intrinsic.slang be TEST not TEST_DIAGNOSTIC
* Use Index for StringUtil.
* WIP: First pass support for parsing Slang diagnostics.
* WIP Testing comparing with ParseDiagnosticUtil with previous ad-hoc mechanism.
* Use the new parsing mechanism for diagnostic comparisons.
* Improvements to diagnostics parsing.
Better error handling, and fallback handling.
Added ability to parse downstream compilers without a prefix.
Added ability to parse Slang with a prefix.
* DownstreamDiagnostic::Type -> Severity and related fixes.
* Small fixes around moving from DownstreamDiagnostic::Type -> Severity
* Small comment fixes.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP diagnostics for line number output.
* Small param naming change
* Use x macro for pass through compile human name lookup/getting.
* WIP on parsing downstream compiler output.
* Split out parsing into ParseDiagnosticUtil.
Added test result of single line.
* Dump out the std output on fail to parse diagnostics.
* Change test type for syntax-error-intrinsic.slang be TEST not TEST_DIAGNOSTIC
* Use Index for StringUtil.
* WIP: First pass support for parsing Slang diagnostics.
* WIP Testing comparing with ParseDiagnosticUtil with previous ad-hoc mechanism.
* Use the new parsing mechanism for diagnostic comparisons.
* Improvements to diagnostics parsing.
Better error handling, and fallback handling.
Added ability to parse downstream compilers without a prefix.
Added ability to parse Slang with a prefix.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP diagnostics for line number output.
* Small param naming change
* Use x macro for pass through compile human name lookup/getting.
* WIP on parsing downstream compiler output.
* Split out parsing into ParseDiagnosticUtil.
Added test result of single line.
* Dump out the std output on fail to parse diagnostics.
* Change test type for syntax-error-intrinsic.slang be TEST not TEST_DIAGNOSTIC
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* Make `gfx` compile to a DLL.
* Fix cuda
* Fix cuda build
* Bug gl screen capture bug.
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This change converts a large number of our existing tests to use the `ShaderObject` support that was added to the `gfx` layer.
In many cases, tests were just updated to pass `-shaderobj` and the result Just Worked.
In other cases, a `name` attribute had to be added to one or more `TEST_INPUT` lines.
For tests that did not work with shader objects "out of the box," I spent a little bit of time trying to get them work, but fell back to letting those tests run in the older mode.
Future changes to the infrastructure will be needed to get those additional tests working in the new path.
Along with the changes to test files, the following implementation changes were made to get additional tests working:
* Because the shader object mode uses explicit register bindings (from reflection), the hacky logic that was offseting `u` registers for D3D12 based on the number of render targets gets disabled (by another hack).
* The "flat" reflection information coming from Slang was not correctly reporting "binding ranges" for things that consumed only uniform data (which would be everything on CUDA/CPU), so it was refactored to properly include binding ranges for anything where the type of the field/variable implied a binding range should be created (even if the `LayoutResourceKind` was `::Uniform`).
* A few fixes were made to the CUDA implementation of `Renderer`, in order to get additional tests up and running. Most of these changes had to do with texture bindings, which hadn't really been tested previously.
In addition, a few changes were made that were attempts at getting more tests working, but didn't actually help. These could be dropped if requested:
* As a quality-of-life feature (not being used) the `object` style of `TEST_INPUT` line is upgraded to support inferring the type to use from the type of the input being set.
* Any `object` shader input lines get ignored in non-shader-object mode.
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* COM-ify all slang-gfx interfaces.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Testing out use of lz4.
* Added ICompressionSystem, and LZ4 implementation.
* Add support for deflate compression.
Simplify compression interface - to make more easily work across apis.
* WIP on CompressedFileSystem.
* ImplicitDirectoryCollector
* SubStringIndexMap - > StringSliceIndexMap.
* WIP save stdlib in different containers.
* Support for different archive types for stdlib.
* Fix project.
* CompressedFileSystem -> ArchiveFileSystem.
Added CompressionSystemType::None
* Added ArchiveFileSystem
* Fix problem RiffFileSystem load withoug compression system.
* Test archive types.
Improve diagnostic message.
* Fix typo in testing file system archives.
* Split out archive detection.
* Fix gcc warning issue.
* Fix warning.
* RiffArchiveFileSystem -> RiffFileSystem
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Make `gfx::Renderer` a COM interface.
This is a first step towards making the `gfx` library expose a COM compatible DLL interface. Remaining classes will come as separate PRs.
* Fixup project files
* Fix calling conventions
* Make gfx::create*Renderer() functions increase ref count by 1
* Make renderer createFunc return via out parameter
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Co-authored-by: Yong He <yhe@nvidia.com>
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* Cleanup CUDA renderer.
* More cleanup
* fixes.
* update comments
Co-authored-by: Yong He <yhe@nvidia.com>
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* Implements CUDA renderer in gfx.
* Revert unnecessary change.
* Revert unnecessary changes.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Move reflection to reflection-api.
* Slight reorg to pull out potentially Slang internal functions from the reflection API impls.
* Remove visual studio projects
* Fix for slang-binaries copy.
* Add the visual studio projects in build/visual-studio
* Remove miniz project.
* Differentiate the linePath from the filePath.
* Improve comment in premake5.lua + to kick of CI.
* Kick CI.
* Use COM compile request for calls to functions inside api-less-slang.
Add static-slang project.
* Fix const typo issue.
* Don't include 'core' link in 'api-less-slang'
* Removed static-slang lib causes problems on linux with linking.
Embed Slang stdlib
Added StaticBlob
Added dumpSourceBytes
Use ConstArrayView for the archive.
At startup allow loading of zip with stdlib.
Made -save-stdlib -load-stdlib take a name
Added '-save-stdlib-bin-source' to save out serialized stdlib as source.
* Ability enable/disable stdlib embedding.
* Fix problem with moduleDecl not having module pointer set when serialized in.
* Set of debugdir for slang-test and examples.
* Add slang-stdlib-api.cpp
* Update slang filters for VS.
* Try to use pic, and -mcmodel=medium
* Some more efforts ot make premake work.
* WIP premake5.lua from previously working version.
* Remove api-less-slang project.
* Disable dllexport on gcc/clang.
* Embed via slangc-bootstrap.
* Fix slang-profile. Always compiles without stdlib.
* Use pic "On"
* Remove slangc-bootstrap and embed-stdlib-generator if embedding not required. Make bootstrap run the generators.
* Improve comments in premake5.lua.
Kick off another CI build.
* Remove generation of stdlib source from std-lib-serialize.slang
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* Move ShaderObject to be under renderer interface.
* Make `create*PipelineState` take `const PipelineStateDesc&`.
* Move ShaderCursor implementation to a cpp file
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Move reflection to reflection-api.
* Slight reorg to pull out potentially Slang internal functions from the reflection API impls.
* Remove visual studio projects
* Fix for slang-binaries copy.
* Add the visual studio projects in build/visual-studio
* Remove miniz project.
* Differentiate the linePath from the filePath.
* Improve comment in premake5.lua + to kick of CI.
* Kick CI.
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* Add shader object parameter binding to renderer_test.
* remove multiple-definitions.hlsl
* Fix cuda implementation.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Add miniz
* Fix for separator in CacheFileSystem.
Add compression unit test for zip.
* Put zip compression into core.
* Remove delimiter stripping if simplifying a path - as stripping will fix delimiters.
* ZipFileSystem WIP.
* More ZipFileSystem working.
* Added isEmpty.
Fixed small bug is contains.
* First pass support for mutability on zip.
* Improvements to File::read/writeAllBytes
* Can access and save archive - but has memory leaks.
* Fix memory leak.
* Some ZIP compression tests.
* Fix memory leak on ScopedAllocation.
Fix off by one bug on UIntSet
* Bug fix in UIntSet
* Fix remaining ZipFileSystem issues.
Adde stand alone unit-test.
* Turn tabs to spaces in slang-io.h
* Renamed mode ReadWrite (instead of just Write)
* Make miniz it's own project.
* Fix windows warning on win32.
* Remove warnings needed when miniz was included as a header library.
* Set the C++ standard via 'flags' in premake.
* Add support for 'implicit' paths.
* Add testing for implicit directories.
Better handling of implicit directories.
* Improve comments in ZipFileSystem.
* Update comment around reader/writer transformation.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Hopefully fix for TC issue where canonical path causes problems - perhaps because on test machines visibility of paths outside the build environment is limited.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP for COM CompileRequest.
* Add more methods to IGlobalSession.
* Fix createCompileRequest.
Made slangc tool use COM style methods.
* m_ prefix variables in EndToEndCompileRequest
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Mangling/module name extraction for GenericDecl
* Add comment on SerialFilter to explain re-enabling Stmt.
* Support setting up SyntaxDecl when reconstructed after deserialization.
* Improvements to setup SyntaxDecl.
* Fix typo so can read compressed SourceLocs.
* Fix issue with SourceManger.
* Simple test for serializing out stdlib and reading back in.
* Fix calling convention.
* Add override to StdLib impls.
* Fix typo.
* Apply testing to an actual compute test when using load-stdlib
Make -load/compile-stdlib processable by Slang
Move out testing into util into TestToolUtil so can be shared.
* Slightly more concise setup of session.
* Fix some errors introduced with session handling.
* Made setup for compile same across slangc and slangc-tool.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Improve diagnostic for token pasting.
* Token paste location test.
* Output include hierarchy.
* WIP on includes hierarchy.
* Improved include hierarchy output - to handle source files without tokens.
Improved test case.
* Small comment improvements.
Fixed a typo with not returning a reference.
* Slight simplification of the ViewInitiatingHierarchy, by adding GetOrAddValue to Dictionary.
* Remove the need for ViewInitiatingHierarchy type.
* Improve output of path in diagnostic for includes hierarchy.
* Remove comment in diagnostic for token-paste-location.slang
* Update command line docs to include `-output-includes`
Co-authored-by: Yong He <yonghe@outlook.com>
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* Use integer RTTI/witness handles in existential tuples.
* Fix clang error.
* Fix IR serialization to use 16bits for opcode.
* Undo accidental comment change.
* Use variable length encoding for opcode.
* Fix compile error.
* Fixing issues
* Fix code review issues.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix handling of access modifiers inside type definition.
* Fix access problem for AST node.
Make dumping produce a single function with switch, to potentially make available without Dump specific access.
* WIP on serialization design doc.
* Remove project references to previously generated files.
* More docs on serialization design.
* Improve serialization documentation.
Remove unused function from IRSerialReader.
* Small fixes around naming. Remove long comment from slang-serialize.h - as covered in serialization.md
* Remove long comment in slang-serialize.h as covered in serialization.md
* More information about doing replacements on read for AST and problems surrounding.
* Typo fix.
* Spelling fixes.
* Value serialize.
* Value types with inheritence.
* Use value reflection serial conversion for more AST types
* Use automatic serialization on more of AST.
* Get the types via decltype, simplifies what the extractor has to do.
* Update the serialization.md for the value serialization.
* Small doc improvements.
* Update project.
* Remove ImportExternalDecl type
Added addImportSymbol and ImportSymbol type
Fixed bug in container which meant it wouldn't read back AST module
* Because of change of how imports and handled, store objects as SerialPointers.
* First pass symbol lookup from mangled names.
* Cache current module looked up from mangled name.
* Fix SourceLoc bug.
Improve comments.
* Added diagnostic on mangled symbol not being found
* Fix typo.
* WIP serializing stdlib.
* WIP serializing stdlib in.
* Fix problem serializing arrays that hold data that is already serialized.
* Remove clash of names in MagicTypeModifier.
* Make conversion from char to String explicit.
Fix reference count issue with SerialReader.
* Add code to save/load stdlib.
* Use return code to avoid warning - SerialContainerUtil::write(module, options, &stream))
* Make all String numeric ctors explicit.
Added isChar to UnownedStringSlice.
Added operator== for UnownedStringSlice to String to avoid need to convert to String and allocate.
* Add error check to readAllText.
* tabs -> spaces on String.h
* tab -> spaces String.cpp
* Remove msg for StringBuilder, just build inplace for exceptions.
* Check SerialClasses - for name clashes.
Renamed Modifier::name as Modifier::keywordName
* Handling of extensions when deserializing AST - updating the moduleDecl->mapTypeToCandidateExtensions
Co-authored-by: Tim Foley <tim.foley.is@gmail.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix handling of access modifiers inside type definition.
* Fix access problem for AST node.
Make dumping produce a single function with switch, to potentially make available without Dump specific access.
* WIP on serialization design doc.
* Remove project references to previously generated files.
* More docs on serialization design.
* Improve serialization documentation.
Remove unused function from IRSerialReader.
* Small fixes around naming. Remove long comment from slang-serialize.h - as covered in serialization.md
* Remove long comment in slang-serialize.h as covered in serialization.md
* More information about doing replacements on read for AST and problems surrounding.
* Typo fix.
* Spelling fixes.
* Value serialize.
* Value types with inheritence.
* Use value reflection serial conversion for more AST types
* Use automatic serialization on more of AST.
* Get the types via decltype, simplifies what the extractor has to do.
* Update the serialization.md for the value serialization.
* Small doc improvements.
* Update project.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix handling of access modifiers inside type definition.
* Fix access problem for AST node.
Make dumping produce a single function with switch, to potentially make available without Dump specific access.
* Remove project references to previously generated files.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Added CharUtil.
Added TypeSet to extractor.
First pass at being able to specify all headers for multiple output headers.
* Fix includes for new C++ extractor convension.
Update premake5 to use new extractor mechanisms.
* Small improvements around StringUtil.
* Split out NameConventionUtil.
* Use a 'convert' to convert between convention types.
* Fix output of build message for C++ extractor.
Improve NameConventionUtil interface.
* Improve comments.
* Fix warning on gcc.
* Fix clang warning.
* Fix some typos in NameConventionUtil.
* Small fix to premake5.lua
* Fix generated includes.
* Remove m_reflectType as no longer applicable with TypeSet.
* Fix .gitignore for slang-generated-* files.
Added getConvention to determine convention from slice.
Add versions of split and convert that infer the from convention
* Fix typo in spliting camel.
* LineWhitespace -> HorizontalWhitespace
* Improve CharUtil comments.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Handle scope of VkShaderModule.
* Fix tabbing issue.
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* First pass at generalizing serializer.
* Split out ReflectClassInfo
* Use the general ReflectClassInfo
* Fix some typos in debug generalized serialization.
* Add calculation of classIds.
Make distinct addCopy/add on SerialClasses.
* Write up of more generalized serialization
* WIP to transition from ASTSerialReader/Writer etc to generalized SerialReader/Writer and associated types.
* Improvements to SerialExtraObjects.
Keep RefObjects in scope in factory
* Compiles with Serial refactor - doesn't quite work yet.
* First pass serialization appears to work with refector.
* Split out type info for general slang types.
* Split out slang-serialize-misc-type-info.h
* DebugSerialData -> SerialSourecLocData
DebugSerialReader -> SerialSourceLocReader
DebugSerialWriter -> SerialSourceLocWriter
* Remove unused template that only compiles on VS.
* Fix warning around unused function on non-VS.
* Improve output of type names that are in scopes in C++ extractor.
Update premake5.lua to run generation for RefObject derived types.
* C++ extractor working on RefObject type.
* Split out serialization functionality that spans different types into slang-serialization-factory.cpp/.h
Put AST type info into header.
Removed RefObjectSerialSubType - use RefObjectType
Add filtering for RefObject derived types
Remove construction and filteringhacks.
* Set up field serialization for SerialRefObject derived types.
* Fix template problem compiling on Clang/Gcc
* Work in progress to make Value types work.
* Added slang-value-reflect.cpp
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* Use new vulkan debug layer.
* Try use VK_LAYER_KHRONOS_validation when it exists.
Co-authored-by: Tim Foley <tim.foley.is@gmail.com>
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* Enable default cpp prelude.
* Print the "#include" line as a normal source if the file does not exist.
* Bug fix
* Fix.
* Fix c++ prelude header.
* Remove unnecessary fopen call.
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Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Embed default prelude for CUDA
Slang supports the notion of a "prelude" that gets prepended to the source code we generate in language. For some targets, a prelude is not necessary (e.g., we compile to HLSL/GLSL and then on to DXBC/DXIL/SPIR-V just fine without a prelude), but some targets have been implemented in a way that makes a prelude necessary (notably CPU and CUDA). For the targets that require a prelude, the Slang codebase includes usable preludes under the `prelude/` directory.
Prior to this change, if a user was compiling for such a target (whether via command-line or API), there had to take responsibility for specifying the prelude to use (usually by passing in the contents of the prelude file(s) already included in the Slang distribution).
It is reasonable for a user to expect an out-of-the-box experience where compilation to CUDA PTX or native CPU code should Just Work, similarly to how compilation to SPIR-V Just Works. This change is a step in the direction of providing a user experiene that Just Works for common cases.
The main addition here is a tool called `slang-embed` that we run during our build to turn the `prelude/*.h` files into `prelude/*.h.cpp` files that embed the contents of the original `.h` file as a `const` variable.
By compiling and linking in the generated `.h.cpp` file for the CUDA prelude, we are then able to set the default prelude to use for CUDA at the time a session/linkage is created. That default prelude will be used unless the user manually specifies their own prelude (which current users of the CUDA back-end must be doing).
This change only sets up a default prelude for CUDA because of the way that the CPU prelude is split across multiple files. A strategy that provides a good default prelude for CPU may take more work, but that work might also be unnecessary if we switch to a strategy of using LLVM to generate native code.
The implementation of the `slang-embed` tool is intentionally simple, and it will likely run into issues if/when we need to embed binary files or larger text files. The assumption being made here is that we can address those issues when they arise, and there is no reason to over-engineer the tool right now.
The way that `slang-embed` is integrated into our build process is likely to require some iteration to make sure that it works across all platforms. I expect that this change will have multiple follow-up fixes related to trying to get the build to work as expected across all targets on CI.
* fixup: trying to ensure that embedded prelude gets compiled into slang
* fixup: properly clean up allocations in slang-embed
* fixup: fix double free introduced by previous change
* fixup: off-by-one allocation error
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* Support shader parameters that are an array of existential type.
* Rename to getFirstNonExistentialValueCategory
Co-authored-by: Yong He <yhe@nvidia.com>
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