Add metal downstream compiler + metallib target. (#3990)

* Add metal downstream compiler + metallib target.

* Add more comments.

* Add missing override.

2 files changed, 7 insertions, 0 deletions

diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index cb77c8830..eca103339 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -987,6 +987,12 @@ static PassThroughFlags _getPassThroughFlagsForTarget(SlangCompileTarget target)
             return PassThroughFlag::Dxc;
         }
 
+        case SLANG_METAL_LIB:
+        case SLANG_METAL_LIB_ASM:
+        {
+            return PassThroughFlag::Metal;
+        }
+
         case SLANG_SHADER_HOST_CALLABLE:
         case SLANG_HOST_HOST_CALLABLE:
 
diff --git a/tools/slang-test/test-context.h b/tools/slang-test/test-context.h
index aa27f7d96..7006ec905 100644
--- a/tools/slang-test/test-context.h
+++ b/tools/slang-test/test-context.h
@@ -37,6 +37,7 @@ struct PassThroughFlag
         Generic_C_CPP = 1 << int(SLANG_PASS_THROUGH_GENERIC_C_CPP),
         NVRTC = 1 << int(SLANG_PASS_THROUGH_NVRTC),
         LLVM = 1 << int(SLANG_PASS_THROUGH_LLVM),
+        Metal = 1 << int(SLANG_PASS_THROUGH_METAL)
     };
 };