[Interpreter] Reduce temporary register usage in generated bytecode.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

Index: test/unittests/interpreter/bytecode-array-builder-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-array-builder-unittest.cc b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
index 251f2975b68869db36b8d6b7db9d05a5e3b3f64a..6f05bd36582c0a5294414e60dd87846e1ea8d465 100644
--- a/test/unittests/interpreter/bytecode-array-builder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-array-builder-unittest.cc
@@ -173,12 +173,12 @@ TEST_F(BytecodeArrayBuilderTest, FrameSizesLookGood) {
         builder.set_parameter_count(0);
         builder.set_locals_count(locals);
         builder.set_context_count(contexts);
-        builder.Return();
 
         TemporaryRegisterScope temporaries(&builder);
         for (int i = 0; i < temps; i++) {
-          temporaries.NewRegister();
+          builder.StoreAccumulatorInRegister(temporaries.NewRegister());
         }
+        builder.Return();
 
         Handle<BytecodeArray> the_array = builder.ToBytecodeArray();
         int total_registers = locals + contexts + temps;
@@ -242,6 +242,32 @@ TEST_F(BytecodeArrayBuilderTest, Parameters) {
 }
 
 
+TEST_F(BytecodeArrayBuilderTest, RegisterType) {
+  BytecodeArrayBuilder builder(isolate(), zone());
+  builder.set_parameter_count(10);
+  builder.set_locals_count(3);
+  builder.set_context_count(0);
+
+  TemporaryRegisterScope temporary_register_scope(&builder);
+  Register temp0 = temporary_register_scope.NewRegister();
+  Register param0(builder.Parameter(0));
+  Register param9(builder.Parameter(9));
+  Register temp1 = temporary_register_scope.NewRegister();
+  Register reg0(0);
+  Register reg1(1);
+  Register reg2(2);
+  Register temp2 = temporary_register_scope.NewRegister();
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(temp0), false);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(temp1), false);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(temp2), false);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(param0), true);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(param9), true);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(reg0), true);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(reg1), true);
+  CHECK_EQ(builder.RegisterIsParameterOrLocal(reg2), true);
+}
+
+
 TEST_F(BytecodeArrayBuilderTest, Constants) {
   BytecodeArrayBuilder builder(isolate(), zone());
   builder.set_parameter_count(0);