[Interpreter] Always store current context in the frames context slot.

test/unittests/compiler/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/compiler/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 391 matching lines @@
     EXPECT_EQ(1, end->InputCount());
     Node* tail_call_node = end->InputAt(0);
 
     EXPECT_THAT(tail_call_node,
                 IsTailCall(m.call_descriptor(), _, accumulator_value_2, _, _, _,
                            _, _, _));
   }
 }
 
 
+TARGET_TEST_F(InterpreterAssemblerTest, GetSetContext) {
+  TRACED_FOREACH(interpreter::Bytecode, bytecode, kBytecodes) {
+    InterpreterAssemblerForTest m(this, bytecode);
+    Node* context_node = m.Int32Constant(100);
+    m.SetContext(context_node);
+    EXPECT_THAT(m.GetContext(), context_node);
+  }
+}
+
+
 TARGET_TEST_F(InterpreterAssemblerTest, RegisterLocation) {
   TRACED_FOREACH(interpreter::Bytecode, bytecode, kBytecodes) {
     InterpreterAssemblerForTest m(this, bytecode);
     Node* reg_index_node = m.Int32Constant(44);
     Node* reg_location_node = m.RegisterLocation(reg_index_node);
     EXPECT_THAT(
         reg_location_node,
         IsIntPtrAdd(
             IsParameter(Linkage::kInterpreterRegisterFileParameter),
             IsWordShl(reg_index_node, IsInt32Constant(kPointerSizeLog2))));
@@ skipping 260 matching lines @@
         feedback_vector,
         m.IsLoad(MachineType::AnyTagged(), load_shared_function_info_matcher,
                  IsIntPtrConstant(SharedFunctionInfo::kFeedbackVectorOffset -
                                   kHeapObjectTag)));
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8