[Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline.

test/unittests/interpreter/interpreter-assembler-unittest.cc

 // Copyright 2015 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 "test/unittests/interpreter/interpreter-assembler-unittest.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/node.h"
 #include "src/interface-descriptors.h"
@@ skipping 364 matching lines @@
               _, code_target_matcher,
               IsParameter(InterpreterDispatchDescriptor::kAccumulatorParameter),
               next_bytecode_offset_matcher, _,
               IsParameter(
                   InterpreterDispatchDescriptor::kDispatchTableParameter),
               _, _));
     }
   }
 }
 
-TARGET_TEST_F(InterpreterAssemblerTest, InterpreterReturn) {
-  // If debug code is enabled we emit extra code in InterpreterReturn.
-  if (FLAG_debug_code) return;
-
-  TRACED_FOREACH(interpreter::Bytecode, bytecode, kBytecodes) {
-    InterpreterAssemblerForTest m(this, bytecode);
-    Node* tail_call_node = m.InterpreterReturn();
-
-    Handle<HeapObject> exit_trampoline =
-        isolate()->builtins()->InterpreterExitTrampoline();
-    Matcher<Node*> exit_trampoline_entry_matcher =
-        IsIntPtrAdd(IsHeapConstant(exit_trampoline),
-                    IsIntPtrConstant(Code::kHeaderSize - kHeapObjectTag));
-    EXPECT_THAT(
-        tail_call_node,
-        IsTailCall(
-            _, exit_trampoline_entry_matcher,
-            IsParameter(InterpreterDispatchDescriptor::kAccumulatorParameter),
-            IsParameter(
-                InterpreterDispatchDescriptor::kBytecodeOffsetParameter),
-            _,
-            IsParameter(InterpreterDispatchDescriptor::kDispatchTableParameter),
-            _, _));
-  }
-}
-
 TARGET_TEST_F(InterpreterAssemblerTest, BytecodeOperand) {
   static const OperandScale kOperandScales[] = {
       OperandScale::kSingle, OperandScale::kDouble, OperandScale::kQuadruple};
   TRACED_FOREACH(interpreter::Bytecode, bytecode, kBytecodes) {
     TRACED_FOREACH(interpreter::OperandScale, operand_scale, kOperandScales) {
       InterpreterAssemblerForTest m(this, bytecode, operand_scale);
       int number_of_operands =
           interpreter::Bytecodes::NumberOfOperands(bytecode);
       for (int i = 0; i < number_of_operands; i++) {
         int offset = interpreter::Bytecodes::GetOperandOffset(bytecode, i,
@@ skipping 306 matching lines @@
         feedback_vector,
         m.IsLoad(MachineType::AnyTagged(), load_shared_function_info_matcher,
                  IsIntPtrConstant(SharedFunctionInfo::kFeedbackVectorOffset -
                                   kHeapObjectTag)));
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8