Revert "Revert "ART: Reference.getReferent intrinsic for x86 and x86_64""

This reverts commit 0997d24e67d78f2146ebae2888eda0d7d254789a.

ART_HEAP_POISONING=true mode is fixed.

Change-Id: I83f6d5c101ea6a86802753f81b3e4348a263fb21
Signed-off-by: Serguei Katkov <serguei.i.katkov@intel.com>
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 56c5b06..30eca2c 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -762,10 +762,9 @@
   }
 }
 
-void CodeGeneratorX86_64::GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke,
-                                                     Location temp) {
+Location CodeGeneratorX86_64::GenerateCalleeMethodStaticOrDirectCall(HInvokeStaticOrDirect* invoke,
+                                                                     Location temp) {
   // All registers are assumed to be correctly set up.
-
   Location callee_method = temp;  // For all kinds except kRecursive, callee will be in temp.
   switch (invoke->GetMethodLoadKind()) {
     case HInvokeStaticOrDirect::MethodLoadKind::kStringInit:
@@ -815,6 +814,13 @@
       break;
     }
   }
+  return callee_method;
+}
+
+void CodeGeneratorX86_64::GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke,
+                                                     Location temp) {
+  // All registers are assumed to be correctly set up.
+  Location callee_method = GenerateCalleeMethodStaticOrDirectCall(invoke, temp);
 
   switch (invoke->GetCodePtrLocation()) {
     case HInvokeStaticOrDirect::CodePtrLocation::kCallSelf: