Fix precompiledTargetModule tests (#6455)

* Fix precompiledTargetModule tests

Add SPIRV-Tool linker support to gfx unit tests
and use the linker in precompileModule tests
that use precompiled modules to reconstitute
SPIRV shaders that were modularly compiled.

Fix a Slang reference count bug in the
precompile service.

* Use sm_6_6

New DXC requires higher version
for linkability.

* Rename helper function, pass by reference

* Link through slang-glslang

* Add missing files

* Fix metal

* format code

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/tools/gfx/vulkan/glslang-module.h b/tools/gfx/vulkan/glslang-module.h
new file mode 100644
index 000000000..cda903577
--- /dev/null
+++ b/tools/gfx/vulkan/glslang-module.h
@@ -0,0 +1,36 @@
+// glslang-module.h
+#pragma once
+
+#include "core/slang-list.h"
+#include "external/spirv-tools/include/spirv-tools/linker.hpp"
+#include "slang-com-helper.h"
+#include "slang-com-ptr.h"
+#include "slang-glslang/slang-glslang.h"
+#include "slang.h"
+
+namespace gfx
+{
+
+struct GlslangModule
+{
+    /// true if has been initialized
+    SLANG_FORCE_INLINE bool isInitialized() const { return m_module != nullptr; }
+
+    /// Initialize
+    Slang::Result init();
+
+    /// Destroy
+    void destroy();
+
+    /// Dtor
+    ~GlslangModule() { destroy(); }
+
+    Slang::ComPtr<ISlangBlob> linkSPIRV(Slang::List<Slang::ComPtr<ISlangBlob>> spirvModules);
+
+protected:
+    void* m_module = nullptr;
+
+    glslang_LinkSPIRVFunc m_linkSPIRVFunc = nullptr;
+};
+
+} // namespace gfx