Port of all JIT changes for .NET Framework 4.6.1 changes

    http://blogs.msdn.com/b/dotnet/archive/2015/11/30/net-framework-4-6-1-is-now-available.aspx

.NET Framework list of changes in 4.6.1
    https://github.com/Microsoft/dotnet/blob/master/releases/net461/dotnet461-changes.md

Additional changes including
-    Working ARM64 JIT compiler
-    Additional JIT Optimizations
     o    Tail call recursion optimization
     o    Array length tracking optimization
     o    CSE for widening casts
     o    Smaller encoding for RIP relative and absolute addresses in addressing modes
     o    Tracked Local Variable increased to 512
     o    Improved handling of Intrinsics System.GetType()
     o    Improved handling of Math intrinsics
-    Work for the X86 Ryu-JIT compiler

[tfs-changeset: 1557101]

1 files changed, 4 insertions, 0 deletions

diff --git a/src/vm/virtualcallstub.cpp b/src/vm/virtualcallstub.cpp
index a0672c0027..1d5b3abb17 100644
--- a/src/vm/virtualcallstub.cpp
+++ b/src/vm/virtualcallstub.cpp
@@ -83,7 +83,11 @@ UINT32 g_bucket_space_dead = 0;         //# of bytes of abandoned buckets not ye
 // This is the number of times a successful chain lookup will occur before the
 // entry is promoted to the front of the chain. This is declared as extern because
 // the default value (CALL_STUB_CACHE_INITIAL_SUCCESS_COUNT) is defined in the header.
+#ifdef _TARGET_ARM64_
+extern "C" size_t g_dispatch_cache_chain_success_counter;
+#else
 extern size_t g_dispatch_cache_chain_success_counter;
+#endif
 
 #define DECLARE_DATA
 #include "virtualcallstub.h"