Fix build breaks in the CTP JIT.

These breaks were due to unguarded usage of constants that are not present in the CTP JIT/EE interface.

[tfs-changeset: 1573367]

Author: pgavlin

src/jit/compiler.h

@@ -7725,7 +7725,14 @@ public :
 
         // true if we should use the PINVOKE_{BEGIN,END} helpers instead of generating
         // PInvoke transitions inline (e.g. when targeting CoreRT).
-        inline bool         ShouldUsePInvokeHelpers() { return (jitFlags->corJitFlags2 & CORJIT_FLG2_USE_PINVOKE_HELPERS) != 0; }
+        inline bool         ShouldUsePInvokeHelpers()
+        {
+#if COR_JIT_EE_VERSION > 460
+            return (jitFlags->corJitFlags2 & CORJIT_FLG2_USE_PINVOKE_HELPERS) != 0;
+#else
+            return false;
+#endif
+        }
 
         // true if we must generate compatible code with Jit64 quirks
         inline bool         IsJit64Compat()

src/jit/lower.cpp

@@ -2648,6 +2648,7 @@ void Lowering::InsertPInvokeCallProlog(GenTreeCall* call)
 
     noway_assert(comp->lvaInlinedPInvokeFrameVar != BAD_VAR_NUM);
 
+#if COR_JIT_EE_VERSION > 460
     if (comp->opts.ShouldUsePInvokeHelpers())
     {
         // First argument is the address of the frame variable.
@@ -2661,6 +2662,7 @@ void Lowering::InsertPInvokeCallProlog(GenTreeCall* call)
         comp->fgInsertTreeBeforeAsEmbedded(helperCall, insertBefore, comp->compCurStmt->AsStmt(), currBlock);
         return;
     }
+#endif
 
     // emit the following sequence
     //
@@ -2792,6 +2794,7 @@ void Lowering::InsertPInvokeCallProlog(GenTreeCall* call)
 // insert the code that goes after every inlined pinvoke call
 void Lowering::InsertPInvokeCallEpilog(GenTreeCall* call)
 {
+#if COR_JIT_EE_VERSION > 460
     if (comp->opts.ShouldUsePInvokeHelpers())
     {
         noway_assert(comp->lvaInlinedPInvokeFrameVar != BAD_VAR_NUM);
@@ -2808,6 +2811,7 @@ void Lowering::InsertPInvokeCallEpilog(GenTreeCall* call)
         comp->fgInsertTreeAfterAsEmbedded(helperCall, call, comp->compCurStmt->AsStmt(), currBlock);
         return;
     }
+#endif
 
     CORINFO_EE_INFO* pInfo = comp->eeGetEEInfo();
     GenTreeStmt* newStmt;