PersistentShaderCache integration (#2453)

* Shader cache index integrated into RendererBase; Added test for cache eviction policy (which currently does not pass)

* Restructured main if block in getEntryPointCodeFromShaderCache; Post-rebase cleanup

* undo local testing only change

* Fixed issues causing shader cache tests to fail

* Edited gfx.slang to reflect structural changes to IDevice::Desc and to include ShaderCacheDesc; Modified how the cache is reading in the file from disk; Added a check to the cache eviction policy test that checks for correct order of entries in the cache as well as eight total expected output files for D3D12 and Vulkan

* Removed line in gfx-unit-test.cpp for local testing

* Edited .gitignore to ignore all shaders automatically generated by the shader cache tests and removed the test shaders that were previously added; Review changes, most notably with an overhaul of how the cache eviction policy test handles checking order of entries

* Ran premake; Removed local testing specific line (again)

* Removed expected comparison files from earlier commit; Ran premake

* Edited premake5.lua to also ignore the auto-generated shader files from specific shader cache tests

* Fixed weird indent in premake5.lua

1 files changed, 7 insertions, 13 deletions

diff --git a/tools/gfx/persistent-shader-cache.h b/tools/gfx/persistent-shader-cache.h
index 55738a9af..49a4a53dd 100644
--- a/tools/gfx/persistent-shader-cache.h
+++ b/tools/gfx/persistent-shader-cache.h
@@ -1,34 +1,28 @@
 // slang-shader-cache-index.h
 #pragma once
 #include "../../slang.h"
+#include "../../slang-gfx.h"
 #include "../../slang-com-ptr.h"
 
 #include "../../source/core/slang-string.h"
 #include "../../source/core/slang-dictionary.h"
 #include "../../source/core/slang-linked-list.h"
 
-namespace Slang
+namespace gfx
 {
 
+    using namespace Slang;
+
 struct ShaderCacheEntry
 {
     slang::Digest dependencyBasedDigest;
     slang::Digest astBasedDigest;
 };
 
-class PersistentShaderCache
+class PersistentShaderCache : public RefObject
 {
 public:
-    // TODO: Remove in integration PR in favor of new ShaderCacheDesc in slang-gfx.h
-    struct Desc
-    {
-        String cacheFilename;
-        String shaderCachePath;
-        SlangInt entryCountLimit = 1000;
-        ISlangFileSystem* shaderCacheFileSystem = nullptr;
-    };
-
-    PersistentShaderCache(const Desc& inDesc);
+    PersistentShaderCache(const IDevice::ShaderCacheDesc& inDesc);
 
     // Fetch the cache entry corresponding to the provided key. If found, move the entry to
     // the front of entries and return the entry and the corresponding compiled code in
@@ -62,7 +56,7 @@ private:
     void deleteLRUEntry();
 
     // The shader cache's description.
-    Desc desc;
+    IDevice::ShaderCacheDesc desc;
 
     // Dictionary mapping each shader's key to its corresponding node (entry) in the list
     // of entries.