[interpreter] Add OSR nesting level to bytecode header.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 99cca0ac8c7dd0675bce98baa4881ab06a3cd1b8..4f6ea97009957a787c50f86b3efcec008529f989 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -4095,6 +4095,15 @@ void BytecodeArray::set_interrupt_budget(int interrupt_budget) {
   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.
@@ -5053,7 +5062,7 @@ int Code::allow_osr_at_loop_nesting_level() {
 
 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);