Clean up the usage of V8_TARGET_ARCH_${arch} and V8_HOST_ARCH_${arch}

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7870 matching lines @@
   int nodes_added = InliningAstSize(target);
   if (nodes_added == kNotInlinable) return false;
 
   Handle<JSFunction> caller = current_info()->closure();
 
   if (nodes_added > Min(FLAG_max_inlined_nodes, kUnlimitedMaxInlinedNodes)) {
     TraceInline(target, caller, "target AST is too large [early]");
     return false;
   }
 
-#if !defined(V8_TARGET_ARCH_IA32)
+#if !V8_TARGET_ARCH_IA32
   // Target must be able to use caller's context.
   CompilationInfo* outer_info = current_info();
   if (target->context() != outer_info->closure()->context() ||
       outer_info->scope()->contains_with() ||
       outer_info->scope()->num_heap_slots() > 0) {
     TraceInline(target, caller, "target requires context change");
     return false;
   }
 #endif
 
@@ skipping 128 matching lines @@
   HConstant* undefined = graph()->GetConstantUndefined();
   bool undefined_receiver = HEnvironment::UseUndefinedReceiver(
       target, function, call_kind, inlining_kind);
   HEnvironment* inner_env =
       environment()->CopyForInlining(target,
                                      arguments_count,
                                      function,
                                      undefined,
                                      function_state()->inlining_kind(),
                                      undefined_receiver);
-#ifdef V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32
   // IA32 only, overwrite the caller's context in the deoptimization
   // environment with the correct one.
   //
   // TODO(kmillikin): implement the same inlining on other platforms so we
   // can remove the unsightly ifdefs in this function.
   HConstant* context =
       new(zone()) HConstant(Handle<Context>(target->context()));
   AddInstruction(context);
   inner_env->BindContext(context);
 #endif
@@ skipping 3503 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal