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.cc b/compiler/optimizing/code_generator.cc
index 51fbaea..08670a0 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -1305,4 +1305,18 @@
   locations->AddTemp(Location::RequiresRegister());
 }
 
+uint32_t CodeGenerator::GetReferenceSlowFlagOffset() const {
+  ScopedObjectAccess soa(Thread::Current());
+  mirror::Class* klass = mirror::Reference::GetJavaLangRefReference();
+  DCHECK(klass->IsInitialized());
+  return klass->GetSlowPathFlagOffset().Uint32Value();
+}
+
+uint32_t CodeGenerator::GetReferenceDisableFlagOffset() const {
+  ScopedObjectAccess soa(Thread::Current());
+  mirror::Class* klass = mirror::Reference::GetJavaLangRefReference();
+  DCHECK(klass->IsInitialized());
+  return klass->GetDisableIntrinsicFlagOffset().Uint32Value();
+}
+
 }  // namespace art