Add ExactCallableAddress/CanonicalEntrypoint helpers to NodeFactory (#3465)

Removes a bit of boilerplate. This is an API @davidwrighton suggested
some time ago. This was blocked until #3423 got implemented.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/System.Private.Jit/src/Internal/Runtime/JitSupport/JitNodeFactory.cs b/src/System.Private.Jit/src/Internal/Runtime/JitSupport/JitNodeFactory.cs
index 413c17ecc..01615055d 100644
--- a/src/System.Private.Jit/src/Internal/Runtime/JitSupport/JitNodeFactory.cs
+++ b/src/System.Private.Jit/src/Internal/Runtime/JitSupport/JitNodeFactory.cs
@@ -86,6 +86,24 @@ namespace ILCompiler.DependencyAnalysis
             return _methodEntrypoints.GetOrAdd(method);
         }
 
+        public IMethodNode ExactCallableAddress(MethodDesc method, bool isUnboxingStub = false)
+        {
+            MethodDesc canonMethod = method.GetCanonMethodTarget(CanonicalFormKind.Specific);
+            if (method != canonMethod)
+                return FatFunctionPointer(method, isUnboxingStub);
+            else
+                return MethodEntrypoint(method, isUnboxingStub);
+        }
+
+        public IMethodNode CanonicalEntrypoint(MethodDesc method, bool isUnboxingStub = false)
+        {
+            MethodDesc canonMethod = method.GetCanonMethodTarget(CanonicalFormKind.Specific);
+            if (method != canonMethod)
+                return ShadowConcreteMethod(method, isUnboxingStub);
+            else
+                return MethodEntrypoint(method, isUnboxingStub);
+        }
+
         public IMethodNode RuntimeDeterminedMethod(MethodDesc method) { throw new NotImplementedException(); }
         public JitFrozenStringNode SerializedStringObject(string data) { return _frozenStrings.GetOrAdd(data); }
         public JitGenericMethodDictionaryNode MethodGenericDictionary(MethodDesc method) { throw new NotImplementedException(); }