Thumb2 Backend: Thumb2 changes for Deoptimization and Code Aging

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index e07b6c056b681275dbe04abd32aaa065035f4633..eed4d02e3a1ee580d72cb685e818c98016b7ddc8 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4611,7 +4611,8 @@ class DeoptimizationInputData: public FixedArray {
   static const int kTranslationIndexOffset = 1;
   static const int kArgumentsStackHeightOffset = 2;
   static const int kPcOffset = 3;
-  static const int kDeoptEntrySize = 4;
+  static const int kModeOffset = 4;
+  static const int kDeoptEntrySize = 5;
 
   // Simple element accessors.
 #define DEFINE_ELEMENT_ACCESSORS(name, type)      \
@@ -4643,6 +4644,7 @@ class DeoptimizationInputData: public FixedArray {
   DEFINE_ENTRY_ACCESSORS(TranslationIndex, Smi)
   DEFINE_ENTRY_ACCESSORS(ArgumentsStackHeight, Smi)
   DEFINE_ENTRY_ACCESSORS(Pc, Smi)
+  DEFINE_ENTRY_ACCESSORS(Mode, Smi)
 
 #undef DEFINE_ENTRY_ACCESSORS
 
@@ -5169,7 +5171,7 @@ class Code: public HeapObject {
   // compilation stub.
   static void MakeCodeAgeSequenceYoung(byte* sequence);
   void MakeOlder(MarkingParity);
-  static bool IsYoungSequence(byte* sequence);
+  static bool IsYoungSequence(byte* sequence, bool thumb_mode = false);
   bool IsOld();
   int GetAge();
 
@@ -5312,12 +5314,14 @@ class Code: public HeapObject {
   static void GetCodeAgeAndParity(Code* code, Age* age,
                                   MarkingParity* parity);
   static void GetCodeAgeAndParity(byte* sequence, Age* age,
-                                  MarkingParity* parity);
+                                  MarkingParity* parity,
+                                  bool thumb_mode = false);
   static Code* GetCodeAgeStub(Age age, MarkingParity parity);
 
   // Code aging -- platform-specific
   static void PatchPlatformCodeAge(byte* sequence, Age age,
-                                   MarkingParity parity);
+                                   MarkingParity parity,
+                                   bool is_thumb_mode = false);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Code);
 };