Implements OSR for arm and mips.

runtime/vm/code_generator.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/bigint_operations.h"
 #include "vm/code_patcher.h"
@@ skipping 39 matching lines @@
 DEFINE_FLAG(bool, trace_optimized_ic_calls, false,
     "Trace IC calls in optimized code.");
 DEFINE_FLAG(bool, trace_patching, false, "Trace patching of code.");
 DEFINE_FLAG(bool, trace_runtime_calls, false, "Trace runtime calls");
 
 DECLARE_FLAG(int, deoptimization_counter_threshold);
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, report_usage_count);
 DECLARE_FLAG(bool, trace_type_checks);
 
-#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
 DEFINE_FLAG(bool, use_osr, true, "Use on-stack replacement.");
-#else
-DEFINE_FLAG(bool, use_osr, false, "Use on-stack replacement.");
-#endif
 DEFINE_FLAG(bool, trace_osr, false, "Trace attempts at on-stack replacement.");
 
 
 DEFINE_RUNTIME_ENTRY(TraceFunctionEntry, 1) {
   ASSERT(arguments.ArgCount() ==
       kTraceFunctionEntryRuntimeEntry.argument_count());
   const Function& function = Function::CheckedHandle(arguments.ArgAt(0));
   const String& function_name = String::Handle(function.name());
   const String& class_name =
       String::Handle(Class::Handle(function.Owner()).Name());
@@ skipping 1245 matching lines @@
     function.set_usage_counter(kLowInvocationCount);
     return false;
   }
   return true;
 }
 
 
 DEFINE_RUNTIME_ENTRY(StackOverflow, 0) {
   ASSERT(arguments.ArgCount() ==
          kStackOverflowRuntimeEntry.argument_count());
+#if defined(USING_SIMULATOR)
+  uword stack_pos = Simulator::Current()->get_register(SPREG);
+#else
   uword stack_pos = reinterpret_cast<uword>(&arguments);
+#endif
 
   // If an interrupt happens at the same time as a stack overflow, we
   // process the stack overflow first.
   if (stack_pos < isolate->saved_stack_limit()) {
     // Use the preallocated stack overflow exception to avoid calling
     // into dart code.
     const Instance& exception =
         Instance::Handle(isolate->object_store()->stack_overflow());
     Exceptions::Throw(exception);
     UNREACHABLE();
@@ skipping 528 matching lines @@
 //   Arg1: Value that is being stored.
 DEFINE_RUNTIME_ENTRY(UpdateFieldCid, 2) {
   ASSERT(arguments.ArgCount() == kUpdateFieldCidRuntimeEntry.argument_count());
   const Field& field = Field::CheckedHandle(arguments.ArgAt(0));
   const Object& value = Object::Handle(arguments.ArgAt(1));
 
   field.UpdateCid(value.GetClassId());
 }
 
 }  // namespace dart