[CSA][cleanup] TNodify interpeter's comparisons

TNodify:
 * Equal
 * StrictEqual
 * RelationalComparison

Also TNodify some low hanging Node* in interpreter generator

Bug: v8:6949, v8:9396
Change-Id: I8d6ef775abd10db79cae740e4e26446d7117af25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1801842Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63753}

src/codegen/code-stub-assembler.h

@@ -3393,10 +3393,10 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
                                 TNode<IntPtrT> start_offset,
                                 TNode<IntPtrT> end_offset, RootIndex root);
 
-  Node* RelationalComparison(Operation op, SloppyTNode<Object> left,
-                             SloppyTNode<Object> right,
+  TNode<Oddball> RelationalComparison(
+      Operation op, SloppyTNode<Object> left, SloppyTNode<Object> right,
       SloppyTNode<Context> context,
-                             Variable* var_type_feedback = nullptr);
+      TVariable<Smi>* var_type_feedback = nullptr);
 
   void BranchIfNumberRelationalComparison(Operation op,
                                           SloppyTNode<Number> left,
@@ -3446,12 +3446,12 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
 
   void GotoIfNumberGreaterThanOrEqual(Node* left, Node* right, Label* if_false);
 
-  Node* Equal(SloppyTNode<Object> lhs, SloppyTNode<Object> rhs,
+  TNode<Oddball> Equal(SloppyTNode<Object> lhs, SloppyTNode<Object> rhs,
                        SloppyTNode<Context> context,
-              Variable* var_type_feedback = nullptr);
+                       TVariable<Smi>* var_type_feedback = nullptr);
 
   TNode<Oddball> StrictEqual(SloppyTNode<Object> lhs, SloppyTNode<Object> rhs,
-                             Variable* var_type_feedback = nullptr);
+                             TVariable<Smi>* var_type_feedback = nullptr);
 
   // ECMA#sec-samevalue
   // Similar to StrictEqual except that NaNs are treated as equal and minus zero

src/interpreter/interpreter-generator.cc

@@ -1701,7 +1701,8 @@ IGNITION_HANDLER(InvokeIntrinsic, InterpreterAssembler) {
   TNode<Uint32T> function_id = BytecodeOperandIntrinsicId(0);
   RegListNodePair args = GetRegisterListAtOperandIndex(1);
   TNode<Context> context = GetContext();
-  Node* result = GenerateInvokeIntrinsic(this, function_id, context, args);
+  TNode<Object> result =
+      GenerateInvokeIntrinsic(this, function_id, context, args);
   SetAccumulator(result);
   Dispatch();
 }
@@ -1811,7 +1812,7 @@ class InterpreterCompareOpAssembler : public InterpreterAssembler {
     TNode<Context> context = GetContext();
 
     TVARIABLE(Smi, var_type_feedback);
-    Node* result;
+    TNode<Oddball> result;
     switch (compare_op) {
       case Operation::kEqual:
         result = Equal(lhs, rhs, context, &var_type_feedback);
@@ -2587,8 +2588,8 @@ IGNITION_HANDLER(CreateObjectLiteral, InterpreterAssembler) {
   BIND(&if_not_fast_clone);
   {
     // If we can't do a fast clone, call into the runtime.
-    Node* object_boilerplate_description =
-        LoadConstantPoolEntryAtOperandIndex(0);
+    TNode<ObjectBoilerplateDescription> object_boilerplate_description =
+        CAST(LoadConstantPoolEntryAtOperandIndex(0));
     TNode<Context> context = GetContext();
 
     TNode<WordT> flags_raw =