Shader caching (#2432)

* Changed all getEntryPointCode calls to use RendererBase::getEntryPointCodeFromShaderCache

* Hashing hooked up, tests pass but need to add more to fully test functionality

* checkpoint

* Checkpoint: File system creation seems functional, saving is broken

* checkpoint: Fixed filename generation from MD5 hash, shader blob might be going missing ahead of pipeline state creation

* Fixed a lot of bugs related to hash code generation, shader cache is likely working but needs further testing

* Added workaround for module loading by re-creating the test device, shader cache test functional

* Vulkan shader caching bug fixed, checkpoint commit before more refinement

* pre-ToT merge checkpoint

* checkpoint commit, improving cache keys

* Significantly expanded items included in the dependency hash for Module; Added dependency hash functions to SpecializedComponentType and RenamedEntryPointComponentType

* Temporarily disable shader cache test

* Mid cleanup changes, solution successfully builds

* Added several helper update functions to slang-md5 to help simplify usage; Added a function under ISession to compute a hash for all linkage-related items; Function renames and cleaned up some comments

* Ran premake.bat; Renamed getASTBasedHashCode to computeASTBasedHash

* Added slang unit tests for Checksum and MD5; Extended gfx shader cache test to test with multiple shader files and one shader file with multiple entry points

* Solution builds and shader cache tests pass, but at least a couple other tests now failing

* ran premake.bat

* More cleanup changes

* Added shaderCachePath field to IDevice desc in gfx.slang, gfx-smoke.slang should be functional

* ran premake

* cleanup changes; Adding test printf to getEntryPointCodeFromShaderCache to see if output can be seen in CI

* Removed debugging printfs; Added handling for getEntryPointCode() failing

* Cleanup changes; Jonathan's fixes to SerialWriter to zero initialize otherwise uninitialized memory; Change to SwizzleExpr creation to zero initialize elementCount

* Changed enable_if_t to enable_if

* Fixed enable_if

* Added test for import vs include and changes to included and imported files; Fixed build errors in CUDA; Renamed shader cache statistics fields

* cleanup changes

* Readd removed file

* Restructured computeDependencyBasedHash calls, added computeDependencyBasedHashImpl to all classes dervied from ComponentType

* Applied same restructuring to the AST hash functions

* Cleanup changes; Moved HashBuilder out to slang-digest.h and added some helper functions to streamline the process of adding items to a hash

* Cleanup; Fixed incorrect expected results for shader import and include test

1 files changed, 13 insertions, 1 deletions

diff --git a/tools/gfx-unit-test/gfx-test-util.cpp b/tools/gfx-unit-test/gfx-test-util.cpp
index 9a6a7c4f6..90aec2647 100644
--- a/tools/gfx-unit-test/gfx-test-util.cpp
+++ b/tools/gfx-unit-test/gfx-test-util.cpp
@@ -54,6 +54,13 @@ namespace gfx_test
             diagnosticsBlob.writeRef());
         diagnoseIfNeeded(diagnosticsBlob);
         SLANG_RETURN_ON_FAIL(result);
+
+        ComPtr<slang::IComponentType> linkedProgram;
+        result = composedProgram->link(linkedProgram.writeRef(), diagnosticsBlob.writeRef());
+        diagnoseIfNeeded(diagnosticsBlob);
+        SLANG_RETURN_ON_FAIL(result);
+
+        composedProgram = linkedProgram;
         slangReflection = composedProgram->getLayout();
 
         gfx::IShaderProgram::Desc programDesc = {};
@@ -169,7 +176,7 @@ namespace gfx_test
         compareComputeResultFuzzy(result, expectedResult, expectedBufferSize);
     }
 
-    Slang::ComPtr<gfx::IDevice> createTestingDevice(UnitTestContext* context, Slang::RenderApiFlag::Enum api)
+    Slang::ComPtr<gfx::IDevice> createTestingDevice(UnitTestContext* context, Slang::RenderApiFlag::Enum api, ISlangMutableFileSystem* fileSystem)
     {
         Slang::ComPtr<gfx::IDevice> device;
         gfx::IDevice::Desc deviceDesc = {};
@@ -208,6 +215,11 @@ namespace gfx_test
         void* extDescPtr = &extDesc;
         deviceDesc.extendedDescs = &extDescPtr;
 
+        if (fileSystem)
+        {
+            deviceDesc.shaderCacheFileSystem = fileSystem;
+        }
+
         auto createDeviceResult = gfxCreateDevice(&deviceDesc, device.writeRef());
         if (SLANG_FAILED(createDeviceResult))
         {