Implement Reference.refersTo() intrinsic.

Test: Added tests to 122-npe and 160-read-barrier-stress
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: run-gtests.sh
Test: testrunner.py --target --optimizing
Bug: 172573708
Change-Id: I8342510565289058df218d3249ffac1eb993ca4f

1 files changed, 14 insertions, 0 deletions

diff --git a/compiler/optimizing/intrinsics.cc b/compiler/optimizing/intrinsics.cc
index 10d0b8992c..16c3029770 100644
--- a/compiler/optimizing/intrinsics.cc
+++ b/compiler/optimizing/intrinsics.cc
@@ -392,6 +392,20 @@ void IntrinsicVisitor::CreateReferenceGetReferentLocations(HInvoke* invoke,
   locations->SetOut(Location::RequiresRegister());
 }
 
+void IntrinsicVisitor::CreateReferenceRefersToLocations(HInvoke* invoke) {
+  if (kEmitCompilerReadBarrier && !kUseBakerReadBarrier) {
+    // Unimplemented for non-Baker read barrier.
+    return;
+  }
+
+  ArenaAllocator* allocator = invoke->GetBlock()->GetGraph()->GetAllocator();
+  LocationSummary* locations =
+      new (allocator) LocationSummary(invoke, LocationSummary::kCallOnSlowPath, kIntrinsified);
+  locations->SetInAt(0, Location::RequiresRegister());
+  locations->SetInAt(1, Location::RequiresRegister());
+  locations->SetOut(Location::RequiresRegister());
+}
+
 void IntrinsicVisitor::AssertNonMovableStringClass() {
   if (kIsDebugBuild) {
     ScopedObjectAccess soa(Thread::Current());