[interpreter] Add OSR nesting level to bytecode header.

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 4077 matching lines @@
 
 int BytecodeArray::interrupt_budget() const {
   return READ_INT_FIELD(this, kInterruptBudgetOffset);
 }
 
 void BytecodeArray::set_interrupt_budget(int interrupt_budget) {
   DCHECK_GE(interrupt_budget, 0);
   WRITE_INT_FIELD(this, kInterruptBudgetOffset, interrupt_budget);
 }
 
+int BytecodeArray::osr_loop_nesting_level() const {
+  return READ_INT_FIELD(this, kOSRNestingLevelOffset);
+}
+
+void BytecodeArray::set_osr_loop_nesting_level(int depth) {
+  DCHECK(0 <= depth && depth <= AbstractCode::kMaxLoopNestingMarker);
+  WRITE_INT_FIELD(this, kOSRNestingLevelOffset, depth);
+}
+
 int BytecodeArray::parameter_count() const {
   // Parameter count is stored as the size on stack of the parameters to allow
   // it to be used directly by generated code.
   return READ_INT_FIELD(this, kParameterSizeOffset) >> kPointerSizeLog2;
 }
 
 
 ACCESSORS(BytecodeArray, constant_pool, FixedArray, kConstantPoolOffset)
 ACCESSORS(BytecodeArray, handler_table, FixedArray, kHandlerTableOffset)
 ACCESSORS(BytecodeArray, source_position_table, ByteArray,
@@ skipping 938 matching lines @@
 
 int Code::allow_osr_at_loop_nesting_level() {
   DCHECK_EQ(FUNCTION, kind());
   int fields = READ_UINT32_FIELD(this, kKindSpecificFlags2Offset);
   return AllowOSRAtLoopNestingLevelField::decode(fields);
 }
 
 
 void Code::set_allow_osr_at_loop_nesting_level(int level) {
   DCHECK_EQ(FUNCTION, kind());
-  DCHECK(level >= 0 && level <= kMaxLoopNestingMarker);
+  DCHECK(level >= 0 && level <= AbstractCode::kMaxLoopNestingMarker);
   int previous = READ_UINT32_FIELD(this, kKindSpecificFlags2Offset);
   int updated = AllowOSRAtLoopNestingLevelField::update(previous, level);
   WRITE_UINT32_FIELD(this, kKindSpecificFlags2Offset, updated);
 }
 
 
 int Code::profiler_ticks() {
   DCHECK_EQ(FUNCTION, kind());
   return ProfilerTicksField::decode(
       READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
@@ skipping 3047 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_