Shader cache bugfixes and test additions (#2467)

* Preliminary graphics shader test

* Added test checking that a graphics shader is correctly split into two different entries

* Removed testing only addition

* Changed RequirementDictionary to an OrderedDictionary and added SerialTypeInfo for OrderedDictionary; Added entry point mangled name to the dependency hash

* Added test covering failure case discovered as part of Falcor integration

* Changed DifferentiableTypeSemanticContext::m_mapTypeToIDifferentiableWitness to an OrderedDictionary

* Added serializedAST field to Module in order to save serialized ASTs to avoid reserialization as much as possible; Added classes field to Session in order to save the output of SerialClassesUtil::create to avoid recreating as much as possible

* Changed AST hashing to hash the contents of a Module's file dependencies; Renamed all references to AST hashing to contents hashing

* Further cleanup

* Moved contents hash computation up to Linkage::loadModule and added field to Module to save the computed contents digest

* Changed PreprocessorHandler::handleFileDependency to optionally take an ISlangBlob* containing file contents and changed FrontEndPreprocessorHandler::handleFileDependency to add the source code for an included file to the module's contents digest

* Removed extraneous addToDigest call

* Fixed accidental removal of source code hash for module being loaded

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/gfx/renderer-shared.cpp b/tools/gfx/renderer-shared.cpp
index c7d7933a3..65c625d5d 100644
--- a/tools/gfx/renderer-shared.cpp
+++ b/tools/gfx/renderer-shared.cpp
@@ -368,13 +368,13 @@ Result RendererBase::getEntryPointCodeFromShaderCache(
     // Produce a hash using the AST for this program - This is needed to check whether a cache entry is effectively dirty,
     // or to save along with the compiled code into an entry so the entry can be checked if fetched later on.
     slang::Digest contentsHash;
-    program->computeASTBasedHash(&contentsHash);
+    program->computeContentsBasedHash(&contentsHash);
 
     ComPtr<ISlangBlob> codeBlob;
 
-    // Query the shader cache index for an entry with shaderKey as its key. 
+    // Query the shader cache index for an entry with shaderKey as its key.
     auto entry = persistentShaderCache->findEntry(shaderKey, codeBlob.writeRef());
-    if (entry && contentsHash == entry->Value.astBasedDigest)
+    if (entry && contentsHash == entry->Value.contentsBasedDigest)
     {
         // We found the entry in the cache, and the entry's contents are up-to-date. Nothing else needs to be done.
         shaderCacheHitCount++;