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, 10 insertions, 4 deletions

diff --git a/src/jit/emit.cpp b/src/jit/emit.cpp
index e327657af5..2a5dbf8a8c 100644
--- a/src/jit/emit.cpp
+++ b/src/jit/emit.cpp
@@ -1414,14 +1414,19 @@ void        *       emitter::emitAllocInstr(size_t sz, emitAttr opsz)
 
 
 #if RELOC_SUPPORT
-    if       (EA_IS_DSP_RELOC(opsz) && emitComp->opts.compReloc)
+    // Amd64: ip-relative addressing is supported even when not generating relocatable ngen code
+    if (EA_IS_DSP_RELOC(opsz) 
+#ifndef _TARGET_AMD64_
+              && emitComp->opts.compReloc
+#endif //_TARGET_AMD64_
+       )
     {
         /* Mark idInfo()->idDspReloc to remember that the            */
         /* address mode has a displacement that is relocatable       */
         id->idSetIsDspReloc();
     }
 
-    if       (EA_IS_CNS_RELOC(opsz) && emitComp->opts.compReloc)
+    if (EA_IS_CNS_RELOC(opsz) && emitComp->opts.compReloc)
     {
         /* Mark idInfo()->idCnsReloc to remember that the            */
         /* instruction has an immediate constant that is relocatable */
@@ -5654,6 +5659,7 @@ void                emitter::emitRecordGCcall(BYTE * codePos,
 
     call->cdGCrefRegs     = (regMaskSmall)emitThisGCrefRegs;
     call->cdByrefRegs     = (regMaskSmall)emitThisByrefRegs;
+
 #if EMIT_TRACK_STACK_DEPTH
 #ifndef FEATURE_UNIX_AMD64_STRUCT_PASSING
     noway_assert(FitsIn<USHORT>(emitCurStackLvl / ((unsigned)sizeof(unsigned))));
@@ -6883,7 +6889,7 @@ void        emitter::emitRecordCallSite(ULONG                 instrOffset,  /* I
                                         CORINFO_SIG_INFO*     callSig,      /* IN */
                                         CORINFO_METHOD_HANDLE methodHandle) /* IN */
 {
-#if defined(DEBUG) && !defined(RYUJIT_CTPBUILD)
+#if defined(DEBUG)
     // Since CORINFO_SIG_INFO is a heavyweight structure, in most cases we can
     // lazily obtain it here using the given method handle (we only save the sig
     // info when we explicitly need it, i.e. for CALLI calls, vararg calls, and
@@ -6905,7 +6911,7 @@ void        emitter::emitRecordCallSite(ULONG                 instrOffset,  /* I
     }
 
     emitCmpHandle->recordCallSite(instrOffset, callSig, methodHandle);
-#endif // defined(DEBUG) && !defined(RYUJIT_CTPBUILD)
+#endif // defined(DEBUG)
 }
 
 /*****************************************************************************/