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, 17 insertions, 1 deletions

diff --git a/tools/render-test/options.cpp b/tools/render-test/options.cpp
index dc1850d37..07e8b0e2a 100644
--- a/tools/render-test/options.cpp
+++ b/tools/render-test/options.cpp
@@ -33,6 +33,7 @@ static rhi::DeviceType _toRenderType(Slang::RenderApiType apiType)
     case RenderApiType::Metal:  return rhi::DeviceType::Metal;
     case RenderApiType::CPU:    return rhi::DeviceType::CPU;
     case RenderApiType::CUDA:   return rhi::DeviceType::CUDA;
+    case RenderApiType::WebGPU: return rhi::DeviceType::WGPU;
     default:
         return rhi::DeviceType::Default;
     }
diff --git a/tools/render-test/render-test-main.cpp b/tools/render-test/render-test-main.cpp
index 9e1d60155..31c24b028 100644
--- a/tools/render-test/render-test-main.cpp
+++ b/tools/render-test/render-test-main.cpp
@@ -1192,6 +1192,12 @@ static SlangResult _innerMain(Slang::StdWriters* stdWriters, SlangSession* sessi
             nativeLanguage = SLANG_SOURCE_LANGUAGE_CUDA;
             slangPassThrough = SLANG_PASS_THROUGH_NVRTC;
             break;
+        case DeviceType::WGPU:
+            input.target = SLANG_WGSL;
+            input.profile = "";
+            nativeLanguage = SLANG_SOURCE_LANGUAGE_WGSL;
+            slangPassThrough = SLANG_PASS_THROUGH_NONE;
+            break;
 
 		default:
 			fprintf(stderr, "error: unexpected\n");
diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index a620a7120..d387c815a 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -972,6 +972,11 @@ static PassThroughFlags _getPassThroughFlagsForTarget(SlangCompileTarget target)
         {
             return 0;
         }
+        case SLANG_WGSL_SPIRV:
+        case SLANG_WGSL_SPIRV_ASM:
+        {
+            return PassThroughFlag::Tint;
+        }
         case SLANG_DXBC:
         case SLANG_DXBC_ASM:
         {
@@ -1117,6 +1122,10 @@ static SlangResult _extractRenderTestRequirements(const CommandLine& cmdLine, Te
             nativeLanguage = SLANG_SOURCE_LANGUAGE_CUDA;
             passThru = SLANG_PASS_THROUGH_NVRTC;
             break;
+        case RenderApiType::WebGPU:
+            target = SLANG_WGSL;
+            SLANG_ASSERT(!usePassthru);
+            break;
     }
 
     SlangSourceLanguage sourceLanguage = nativeLanguage;
diff --git a/tools/slang-test/test-context.h b/tools/slang-test/test-context.h
index 314ec2803..c1bd82c8c 100644
--- a/tools/slang-test/test-context.h
+++ b/tools/slang-test/test-context.h
@@ -38,7 +38,7 @@ struct PassThroughFlag
         NVRTC = 1 << int(SLANG_PASS_THROUGH_NVRTC),
         LLVM = 1 << int(SLANG_PASS_THROUGH_LLVM),
         Metal = 1 << int(SLANG_PASS_THROUGH_METAL),
-        WGSL = 1 << int(SLANG_PASS_THROUGH_WGSL)
+        Tint = 1 << int(SLANG_PASS_THROUGH_TINT),
     };
 };