Improve performance when compiling small shaders. (#6396)

Improve performance when compiling small shaders.

Avoid copying witness table entries that are not getting used during linking.
Avoid copying auto-diff related decorations and derivative functions during linking, if the user modules doesn't use autodiff.
Cache operator overload resolution results on global session, so each new Session doesn't need to repetitively run through overload resolution from scratch.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/slang/slang-ir-util.cpp b/source/slang/slang-ir-util.cpp
index a3cf28a68..dbd6ac099 100644
--- a/source/slang/slang-ir-util.cpp
+++ b/source/slang/slang-ir-util.cpp
@@ -2175,4 +2175,14 @@ void legalizeDefUse(IRGlobalValueWithCode* func)
     }
 }
 
+UnownedStringSlice getMangledName(IRInst* inst)
+{
+    for (auto decor : inst->getDecorations())
+    {
+        if (auto linkageDecor = as<IRLinkageDecoration>(decor))
+            return linkageDecor->getMangledName();
+    }
+    return UnownedStringSlice();
+}
+
 } // namespace Slang