Bottleneck `TypeCastIntVal` creation through ASTBuilder (#3171)

* Bottleneck type-cast-int-val creation through ASTBuilder

* Update slang-ast-builder.h

3 files changed, 12 insertions, 3 deletions

diff --git a/source/slang/slang-ast-builder.h b/source/slang/slang-ast-builder.h
index 338993552..f75ab960f 100644
--- a/source/slang/slang-ast-builder.h
+++ b/source/slang/slang-ast-builder.h
@@ -372,6 +372,15 @@ public:
         return getOrCreate<ConstantIntVal>(type, value);
     }
 
+    TypeCastIntVal* getTypeCastIntVal(Type* type, Val* base)
+    {
+        // Unwrap any existing type casts.
+        while (auto baseTypeCast = as<TypeCastIntVal>(base))
+            base = baseTypeCast->getBase();
+            
+        return getOrCreate<TypeCastIntVal>(type, base);
+    }
+
     DeclRef<Decl> getGenericAppDeclRef(DeclRef<GenericDecl> genericDeclRef, ConstArrayView<Val*> args, Decl* innerDecl = nullptr)
     {
         if (!innerDecl)
diff --git a/source/slang/slang-ast-val.cpp b/source/slang/slang-ast-val.cpp
index a0ea60625..8afc6e689 100644
--- a/source/slang/slang-ast-val.cpp
+++ b/source/slang/slang-ast-val.cpp
@@ -1062,7 +1062,7 @@ Val* TypeCastIntVal::_substituteImplOverride(ASTBuilder* astBuilder, Substitutio
             return newVal;
         else
         {
-            auto result = astBuilder->getOrCreate<TypeCastIntVal>(substType, substBase);
+            auto result = astBuilder->getTypeCastIntVal(substType, substBase);
             return result;
         }
     }
diff --git a/source/slang/slang-check-expr.cpp b/source/slang/slang-check-expr.cpp
index e6d1049a0..bf7950310 100644
--- a/source/slang/slang-check-expr.cpp
+++ b/source/slang/slang-check-expr.cpp
@@ -1368,7 +1368,7 @@ namespace Slang
                 TypeCastIntVal::tryFoldImpl(m_astBuilder, targetBasicType, argVals[0], getSink()));
             if (foldVal)
                 return foldVal;
-            auto result = m_astBuilder->getOrCreate<TypeCastIntVal>(targetBasicType, argVals[0]);
+            auto result = m_astBuilder->getTypeCastIntVal(targetBasicType, argVals[0]);
             return result;
         }
         else
@@ -1594,7 +1594,7 @@ namespace Slang
                     TypeCastIntVal::tryFoldImpl(m_astBuilder, substType, val, getSink()));
                 if (foldVal)
                     return foldVal;
-                auto result = m_astBuilder->getOrCreate<TypeCastIntVal>(substType, val);
+                auto result = m_astBuilder->getTypeCastIntVal(substType, val);
                 return result;
             }
         }