Remove relocations for vtable chunks (#17147)

* Separate sections READONLY_VCHUNKS and READONLY_DICTIONARY

* Remove relocations for second-level indirection of Vtable in case FEATURE_NGEN_RELOCS_OPTIMIZATIONS is enabled.

Introduce FEATURE_NGEN_RELOCS_OPTIMIZATIONS, under which NGEN specific relocations optimizations are enabled

* Replace push/pop of R11 in stubs with
  - str/ldr of R4 in space reserved in epilog for non-tail calls
  - usage of R4 with hybrid-tail calls (same as for EmitShuffleThunk)

* Replace push/pop of R11 for function epilog with usage of LR as helper register right before its restore from stack

1 files changed, 12 insertions, 3 deletions

diff --git a/src/vm/method.hpp b/src/vm/method.hpp
index c1316d06c3..57258eb47c 100644
--- a/src/vm/method.hpp
+++ b/src/vm/method.hpp
@@ -1133,7 +1133,16 @@ public:
         }
     }
 
-    PTR_PCODE GetAddrOfSlot();
+    inline BOOL IsVirtualSlot()
+    {
+        return GetSlot() < GetMethodTable()->GetNumVirtuals();
+    }
+    inline BOOL IsVtableSlot()
+    {
+        return IsVirtualSlot() && !HasNonVtableSlot();
+    }
+
+    TADDR GetAddrOfSlot();
 
     PTR_MethodDesc GetDeclMethodDesc(UINT32 slotNumber);
 
@@ -2566,7 +2575,7 @@ public:
         };
 
         // The writeable part of the methoddesc.
-#if defined(PLATFORM_UNIX) && defined(_TARGET_ARM_)
+#if defined(FEATURE_NGEN_RELOCS_OPTIMIZATIONS)
         RelativePointer<PTR_NDirectWriteableData>    m_pWriteableData;
 #else
         PlainPointer<PTR_NDirectWriteableData>    m_pWriteableData;
@@ -3382,7 +3391,7 @@ public: // <TODO>make private: JITinterface.cpp accesses through this </TODO>
         //
         // For generic method definitions that are not the typical method definition (e.g. C<int>.m<U>)
         // this field is null; to obtain the instantiation use LoadMethodInstantiation
-#if defined(PLATFORM_UNIX) && defined(_TARGET_ARM_)
+#if defined(FEATURE_NGEN_RELOCS_OPTIMIZATIONS)
     RelativePointer<PTR_Dictionary> m_pPerInstInfo;  //SHARED
 #else
     PlainPointer<PTR_Dictionary> m_pPerInstInfo;  //SHARED