[Interpreter] Adds support for rest parameters to interpreter.

test/unittests/interpreter/bytecode-array-builder-unittest.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/v8.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecode-register-allocator.h"
 #include "test/unittests/test-utils.h"
@@ skipping 12 matching lines @@
 TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
   BytecodeArrayBuilder builder(isolate(), zone());
 
   builder.set_locals_count(131);
   builder.set_context_count(1);
   builder.set_parameter_count(0);
   CHECK_EQ(builder.locals_count(), 131);
   CHECK_EQ(builder.context_count(), 1);
   CHECK_EQ(builder.fixed_register_count(), 132);
 
+  // Emit argument creation operations. CreateRestArguments should
+  // be output before any bytecodes that change constant pool.
+  builder.CreateArguments(CreateArgumentsType::kMappedArguments)
+      .CreateArguments(CreateArgumentsType::kUnmappedArguments)
+      .CreateRestArguments(0);
+
   // Emit constant loads.
   builder.LoadLiteral(Smi::FromInt(0))
       .LoadLiteral(Smi::FromInt(8))
       .LoadLiteral(Smi::FromInt(10000000))
       .LoadUndefined()
       .LoadNull()
       .LoadTheHole()
       .LoadTrue()
       .LoadFalse();
 
@@ skipping 41 matching lines @@
       .LoadLookupSlot(name, TypeofMode::INSIDE_TYPEOF)
       .StoreLookupSlot(name, LanguageMode::SLOPPY)
       .StoreLookupSlot(name, LanguageMode::STRICT);
 
   // Emit closure operations.
   Handle<SharedFunctionInfo> shared_info = factory->NewSharedFunctionInfo(
       factory->NewStringFromStaticChars("function_a"), MaybeHandle<Code>(),
       false);
   builder.CreateClosure(shared_info, NOT_TENURED);
 
-  // Emit argument creation operations.
-  builder.CreateArguments(CreateArgumentsType::kMappedArguments)
-      .CreateArguments(CreateArgumentsType::kUnmappedArguments);
-
   // Emit literal creation operations.
   builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("a"), 0, 0)
       .CreateArrayLiteral(factory->NewFixedArray(1), 0, 0)
       .CreateObjectLiteral(factory->NewFixedArray(1), 0, 0);
 
   // Call operations.
   builder.Call(reg, other, 1, 0)
       .Call(reg, wide, 1, 0)
       .CallRuntime(Runtime::kIsArray, reg, 1)
       .CallRuntime(Runtime::kIsArray, wide, 1)
@@ skipping 573 matching lines @@
     iterator.Advance();
   }
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8