ART: Reference.getReferent intrinsic for arm and arm64
Test: m test-art-host
Test: m test-art-target
Test: export ART_HEAP_POISONING=true; m test-art-host
Test: export ART_HEAP_POISONING=true; m test-art-target
Bug: 32535355
Change-Id: Ie63317689dd9e03a24e701c30411f8014970173a
diff --git a/compiler/optimizing/intrinsics_arm_vixl.cc b/compiler/optimizing/intrinsics_arm_vixl.cc
index 85e84d8..68c2d2e 100644
--- a/compiler/optimizing/intrinsics_arm_vixl.cc
+++ b/compiler/optimizing/intrinsics_arm_vixl.cc
@@ -2688,6 +2688,60 @@
__ Lsr(out, out, 5);
}
+void IntrinsicLocationsBuilderARMVIXL::VisitReferenceGetReferent(HInvoke* invoke) {
+ if (kEmitCompilerReadBarrier) {
+ // Do not intrinsify this call with the read barrier configuration.
+ return;
+ }
+ LocationSummary* locations = new (arena_) LocationSummary(invoke,
+ LocationSummary::kCallOnSlowPath,
+ kIntrinsified);
+ locations->SetInAt(0, Location::RequiresRegister());
+ locations->SetOut(Location::SameAsFirstInput());
+ locations->AddTemp(Location::RequiresRegister());
+}
+
+void IntrinsicCodeGeneratorARMVIXL::VisitReferenceGetReferent(HInvoke* invoke) {
+ DCHECK(!kEmitCompilerReadBarrier);
+ ArmVIXLAssembler* assembler = GetAssembler();
+ LocationSummary* locations = invoke->GetLocations();
+
+ vixl32::Register obj = InputRegisterAt(invoke, 0);
+ vixl32::Register out = OutputRegister(invoke);
+
+ SlowPathCodeARMVIXL* slow_path = new (GetAllocator()) IntrinsicSlowPathARMVIXL(invoke);
+ codegen_->AddSlowPath(slow_path);
+
+ // Load ArtMethod first.
+ HInvokeStaticOrDirect* invoke_direct = invoke->AsInvokeStaticOrDirect();
+ DCHECK(invoke_direct != nullptr);
+ vixl32::Register temp0 = RegisterFrom(codegen_->GenerateCalleeMethodStaticOrDirectCall(
+ invoke_direct, locations->GetTemp(0)));
+
+ // Now get declaring class.
+ __ Ldr(temp0, MemOperand(temp0, ArtMethod::DeclaringClassOffset().Int32Value()));
+
+ uint32_t slow_path_flag_offset = codegen_->GetReferenceSlowFlagOffset();
+ uint32_t disable_flag_offset = codegen_->GetReferenceDisableFlagOffset();
+ DCHECK_NE(slow_path_flag_offset, 0u);
+ DCHECK_NE(disable_flag_offset, 0u);
+ DCHECK_NE(slow_path_flag_offset, disable_flag_offset);
+
+ // Check static flags that prevent using intrinsic.
+ UseScratchRegisterScope temps(assembler->GetVIXLAssembler());
+ vixl32::Register temp1 = temps.Acquire();
+ __ Ldr(temp1, MemOperand(temp0, disable_flag_offset));
+ __ Ldr(temp0, MemOperand(temp0, slow_path_flag_offset));
+ __ Orr(temp0, temp1, temp0);
+ __ CompareAndBranchIfNonZero(temp0, slow_path->GetEntryLabel());
+
+ // Fast path.
+ __ Ldr(out, MemOperand(obj, mirror::Reference::ReferentOffset().Int32Value()));
+ codegen_->MaybeRecordImplicitNullCheck(invoke);
+ assembler->MaybeUnpoisonHeapReference(out);
+ __ Bind(slow_path->GetExitLabel());
+}
+
UNIMPLEMENTED_INTRINSIC(ARMVIXL, MathMinDoubleDouble)
UNIMPLEMENTED_INTRINSIC(ARMVIXL, MathMinFloatFloat)
UNIMPLEMENTED_INTRINSIC(ARMVIXL, MathMaxDoubleDouble)
@@ -2701,7 +2755,6 @@
UNIMPLEMENTED_INTRINSIC(ARMVIXL, MathRoundFloat) // Could be done by changing rounding mode, maybe?
UNIMPLEMENTED_INTRINSIC(ARMVIXL, UnsafeCASLong) // High register pressure.
UNIMPLEMENTED_INTRINSIC(ARMVIXL, SystemArrayCopyChar)
-UNIMPLEMENTED_INTRINSIC(ARMVIXL, ReferenceGetReferent)
UNIMPLEMENTED_INTRINSIC(ARMVIXL, IntegerHighestOneBit)
UNIMPLEMENTED_INTRINSIC(ARMVIXL, LongHighestOneBit)
UNIMPLEMENTED_INTRINSIC(ARMVIXL, IntegerLowestOneBit)