Add WGSL support for slang-test (#5174)

* Use the assembly description as target when disassembling

I believe this is a bugfix.
It seems to have worked before because up until the WGSL case, the disassembler has been
the same executable as the one producing the binary to be disassembled.

* Add Tint as a downstream compiler

This closes issue #5104.

* Add downstream compiler for Tint.
 * Tint is wrapped in a shared library, 'slang-tint' available from [1].
 * The header file for slang-tint.dll is added in external/slang-tint-headers.
* Add some boilerplate for WGSL targets.
* Add an entry point test for WGSL.

[1] https://github.com/shader-slang/dawn/releases/tag/slang-tint-0

* Add WGSL_SPIRV as supported target for Glslang

* Add WebGPU support to slang-test

This helps to address issue #5051.

* Disable lots of crashing compute tests for 'wgpu'

This closes issue #5051.

---------

Co-authored-by: Yong He <yonghe@outlook.com>

4 files changed, 11 insertions, 0 deletions

diff --git a/source/core/slang-render-api-util.cpp b/source/core/slang-render-api-util.cpp
index 0a303b665..797d82cd7 100644
--- a/source/core/slang-render-api-util.cpp
+++ b/source/core/slang-render-api-util.cpp
@@ -19,6 +19,7 @@ namespace Slang {
     { RenderApiType::Metal,  "mtl,metal",       ""},
     { RenderApiType::CPU,    "cpu",             ""},
     { RenderApiType::CUDA,   "cuda",            "cuda,ptx"},
+    { RenderApiType::WebGPU, "wgpu,webgpu",     "wgsl"},
 };
 
 static int _calcAvailableApis()
@@ -265,6 +266,10 @@ static bool _canLoadSharedLibrary(const char* libName)
     {
 #if SLANG_WINDOWS_FAMILY
         case RenderApiType::Vulkan: return _canLoadSharedLibrary("vulkan-1") || _canLoadSharedLibrary("vk_swiftshader");
+        case RenderApiType::WebGPU:
+            return _canLoadSharedLibrary("webgpu_dawn") &&
+                _canLoadSharedLibrary("dxcompiler") &&
+                _canLoadSharedLibrary("dxil");
 #elif SLANG_APPLE_FAMILY
         case RenderApiType::Vulkan: return true;
         case RenderApiType::Metal:  return true;
diff --git a/source/core/slang-render-api-util.h b/source/core/slang-render-api-util.h
index 224fe6996..f1be930cc 100644
--- a/source/core/slang-render-api-util.h
+++ b/source/core/slang-render-api-util.h
@@ -17,6 +17,7 @@ enum class RenderApiType
     Metal,
     CPU,
     CUDA,
+    WebGPU,
     CountOf,
 };
 
@@ -31,6 +32,7 @@ struct RenderApiFlag
         Metal = 1 << int(RenderApiType::Metal),
         CPU   = 1 << int(RenderApiType::CPU),
         CUDA  = 1 << int(RenderApiType::CUDA),
+        WebGPU = 1 << int(RenderApiType::WebGPU),
         AllOf = (1 << int(RenderApiType::CountOf)) - 1                   ///< All bits set
     };
 };
diff --git a/source/core/slang-type-convert-util.cpp b/source/core/slang-type-convert-util.cpp
index cb5b4d38b..12908f211 100644
--- a/source/core/slang-type-convert-util.cpp
+++ b/source/core/slang-type-convert-util.cpp
@@ -18,6 +18,7 @@ namespace Slang
         case SLANG_CPP_PYTORCH_BINDING:return SLANG_SOURCE_LANGUAGE_CPP;
         case SLANG_HOST_CPP_SOURCE:    return SLANG_SOURCE_LANGUAGE_CPP;
         case SLANG_CUDA_SOURCE:        return SLANG_SOURCE_LANGUAGE_CUDA;
+        case SLANG_WGSL:               return SLANG_SOURCE_LANGUAGE_WGSL;
         default: break;
     }
     return SLANG_SOURCE_LANGUAGE_UNKNOWN;
diff --git a/source/core/slang-type-text-util.cpp b/source/core/slang-type-text-util.cpp
index 9f9deb92c..f02325792 100644
--- a/source/core/slang-type-text-util.cpp
+++ b/source/core/slang-type-text-util.cpp
@@ -64,6 +64,8 @@ static const TypeTextUtil::CompileTargetInfo s_compileTargetInfos[] =
     { SLANG_METAL_LIB,      "metallib",                                         "metallib",                 "Metal Library Bytecode" },
     { SLANG_METAL_LIB_ASM,  "metallib-asm"                                      "metallib-asm",             "Metal Library Bytecode assembly" },
     { SLANG_WGSL,           "wgsl",                                             "wgsl",                     "WebGPU shading language source" },
+    { SLANG_WGSL_SPIRV_ASM, "wgsl-spirv-asm",                                   "wgsl-spirv-asm,wgsl-spirv-assembly", "SPIR-V assembly via WebGPU shading language" },
+    { SLANG_WGSL_SPIRV,     "wgsl-spirv",                                       "wgsl-spirv",                         "SPIR-V via WebGPU shading language" },
 };
 
 static const NamesDescriptionValue s_languageInfos[] =
@@ -91,6 +93,7 @@ static const NamesDescriptionValue s_compilerInfos[] =
     { SLANG_PASS_THROUGH_LLVM,      "llvm",     "LLVM/Clang `slang-llvm`" },
     { SLANG_PASS_THROUGH_SPIRV_OPT, "spirv-opt",  "spirv-tools SPIRV optimizer" },
     { SLANG_PASS_THROUGH_METAL,     "metal",    "Metal shader compiler" },
+    { SLANG_PASS_THROUGH_TINT,      "tint",     "Tint compiler" },
 };
 
 static const NamesDescriptionValue s_archiveTypeInfos[] =