Revert of [turbofan] Support variable size argument popping in TF-generated functions

src/compiler/simplified-lowering.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 730 matching lines @@
                        OperatorProperties::GetFrameStateInputCount(node->op());
     // Visit value, context and frame state inputs as tagged.
     for (int i = 0; i < tagged_count; i++) {
       ProcessInput(node, i, UseInfo::AnyTagged());
     }
     // Only enqueue other inputs (effects, control).
     for (int i = tagged_count; i < node->InputCount(); i++) {
       EnqueueInput(node, i);
     }
   }
-
-  void VisitReturn(Node* node) {
-    int tagged_limit = node->op()->ValueInputCount() +
-                       OperatorProperties::GetContextInputCount(node->op()) +
-                       OperatorProperties::GetFrameStateInputCount(node->op());
-    // Visit integer slot count to pop
-    ProcessInput(node, 0, UseInfo::TruncatingWord32());
-
-    // Visit value, context and frame state inputs as tagged.
-    for (int i = 1; i < tagged_limit; i++) {
-      ProcessInput(node, i, UseInfo::AnyTagged());
-    }
-    // Only enqueue other inputs (effects, control).
-    for (int i = tagged_limit; i < node->InputCount(); i++) {
-      EnqueueInput(node, i);
-    }
-  }
 
   // Helper for an unused node.
   void VisitUnused(Node* node) {
     int value_count = node->op()->ValueInputCount() +
                       OperatorProperties::GetContextInputCount(node->op()) +
                       OperatorProperties::GetFrameStateInputCount(node->op());
     for (int i = 0; i < value_count; i++) {
       ProcessInput(node, i, UseInfo::None());
     }
     ProcessRemainingInputs(node, value_count);
@@ skipping 1680 matching lines @@
         MachineRepresentation output =
             GetOutputInfoForPhi(node, TypeOf(node->InputAt(0)), truncation);
         VisitUnop(node, UseInfo(output, truncation), output);
         if (lower()) DeferReplacement(node, node->InputAt(0));
         return;
       }
 
       case IrOpcode::kOsrGuard:
         return VisitOsrGuard(node);
 
-      case IrOpcode::kReturn:
-        VisitReturn(node);
-        // Assume the output is tagged.
-        return SetOutput(node, MachineRepresentation::kTagged);
-
       // Operators with all inputs tagged and no or tagged output have uniform
       // handling.
       case IrOpcode::kEnd:
+      case IrOpcode::kReturn:
       case IrOpcode::kIfSuccess:
       case IrOpcode::kIfException:
       case IrOpcode::kIfTrue:
       case IrOpcode::kIfFalse:
       case IrOpcode::kDeoptimize:
       case IrOpcode::kEffectPhi:
       case IrOpcode::kTerminate:
       case IrOpcode::kFrameState:
       case IrOpcode::kCheckpoint:
       case IrOpcode::kLoop:
@@ skipping 784 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8