HSubAllocatedObject instruction allows hydrogen code to carve up

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 6e2fc1792ec1e007b3d20fff86364454943afdce..b8bcf80dc78e024de487b92c324f9cab109d14af 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -4341,6 +4341,13 @@ void LCodeGen::DoCallRuntime(LCallRuntime* instr) {
 }
 
 
+void LCodeGen::DoSubAllocatedObject(LSubAllocatedObject* instr) {
+  Register result = ToRegister(instr->result());
+  Register base = ToRegister(instr->base_object());
+  __ add(result, base, Operand(instr->offset()));
+}
+
+
 void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   Register object = ToRegister(instr->object());
   Register value = ToRegister(instr->value());