8 files changed, 0 insertions, 59 deletions
diff --git a/compiler/optimizing/instruction_simplifier.cc b/compiler/optimizing/instruction_simplifier.cc
index 2757f7b719..bb96c211cb 100644
--- a/compiler/optimizing/instruction_simplifier.cc
+++ b/compiler/optimizing/instruction_simplifier.cc
@@ -2146,22 +2146,6 @@ void InstructionSimplifierVisitor::SimplifyStringEquals(HInvoke* instruction) {
     ReferenceTypeInfo argument_rti = argument->GetReferenceTypeInfo();
     if (argument_rti.IsValid() && argument_rti.IsStringClass()) {
       optimizations.SetArgumentIsString();
-    } else if (kUseReadBarrier) {
-      DCHECK(instruction->GetResolvedMethod() != nullptr);
-      DCHECK(instruction->GetResolvedMethod()->GetDeclaringClass()->IsStringClass() ||
-             // Object.equals() can be devirtualized to String.equals().
-             instruction->GetResolvedMethod()->GetDeclaringClass()->IsObjectClass());
-      Runtime* runtime = Runtime::Current();
-      // For AOT, we always assume that the boot image shall contain the String.class and
-      // we do not need a read barrier for boot image classes as they are non-moveable.
-      // For JIT, check if we actually have a boot image; if we do, the String.class
-      // should also be non-moveable.
-      if (runtime->IsAotCompiler() || runtime->GetHeap()->HasBootImageSpace()) {
-        DCHECK(runtime->IsAotCompiler() ||
-               !runtime->GetHeap()->IsMovableObject(
-                   instruction->GetResolvedMethod()->GetDeclaringClass()));
-        optimizations.SetNoReadBarrierForStringClass();
-      }
     }
   }
 }
diff --git a/compiler/optimizing/intrinsics.h b/compiler/optimizing/intrinsics.h
index 06e2fbb355..2d93f234be 100644
--- a/compiler/optimizing/intrinsics.h
+++ b/compiler/optimizing/intrinsics.h
@@ -219,7 +219,6 @@ class StringEqualsOptimizations : public IntrinsicOptimizations {
 
   INTRINSIC_OPTIMIZATION(ArgumentNotNull, 0);
   INTRINSIC_OPTIMIZATION(ArgumentIsString, 1);
-  INTRINSIC_OPTIMIZATION(NoReadBarrierForStringClass, 2);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StringEqualsOptimizations);
diff --git a/compiler/optimizing/intrinsics_arm64.cc b/compiler/optimizing/intrinsics_arm64.cc
index 1abfcb022b..7684dc79f2 100644
--- a/compiler/optimizing/intrinsics_arm64.cc
+++ b/compiler/optimizing/intrinsics_arm64.cc
@@ -1398,13 +1398,6 @@ static const char* GetConstString(HInstruction* candidate, uint32_t* utf16_lengt
 }
 
 void IntrinsicLocationsBuilderARM64::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   locations->SetInAt(0, Location::RequiresRegister());
diff --git a/compiler/optimizing/intrinsics_arm_vixl.cc b/compiler/optimizing/intrinsics_arm_vixl.cc
index 1127fb8191..bc59fcf50c 100644
--- a/compiler/optimizing/intrinsics_arm_vixl.cc
+++ b/compiler/optimizing/intrinsics_arm_vixl.cc
@@ -1458,13 +1458,6 @@ static const char* GetConstString(HInstruction* candidate, uint32_t* utf16_lengt
 }
 
 void IntrinsicLocationsBuilderARMVIXL::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   InvokeRuntimeCallingConventionARMVIXL calling_convention;
diff --git a/compiler/optimizing/intrinsics_mips.cc b/compiler/optimizing/intrinsics_mips.cc
index 771714bf41..6f7f5e49c1 100644
--- a/compiler/optimizing/intrinsics_mips.cc
+++ b/compiler/optimizing/intrinsics_mips.cc
@@ -1516,13 +1516,6 @@ void IntrinsicCodeGeneratorMIPS::VisitStringCompareTo(HInvoke* invoke) {
 
 // boolean java.lang.String.equals(Object anObject)
 void IntrinsicLocationsBuilderMIPS::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   locations->SetInAt(0, Location::RequiresRegister());
diff --git a/compiler/optimizing/intrinsics_mips64.cc b/compiler/optimizing/intrinsics_mips64.cc
index 4a1bd5b7b2..2eb252908c 100644
--- a/compiler/optimizing/intrinsics_mips64.cc
+++ b/compiler/optimizing/intrinsics_mips64.cc
@@ -1369,13 +1369,6 @@ void IntrinsicCodeGeneratorMIPS64::VisitStringCompareTo(HInvoke* invoke) {
 
 // boolean java.lang.String.equals(Object anObject)
 void IntrinsicLocationsBuilderMIPS64::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   locations->SetInAt(0, Location::RequiresRegister());
diff --git a/compiler/optimizing/intrinsics_x86.cc b/compiler/optimizing/intrinsics_x86.cc
index d33c0c344e..3504d7a6f8 100644
--- a/compiler/optimizing/intrinsics_x86.cc
+++ b/compiler/optimizing/intrinsics_x86.cc
@@ -922,13 +922,6 @@ void IntrinsicCodeGeneratorX86::VisitStringCompareTo(HInvoke* invoke) {
 }
 
 void IntrinsicLocationsBuilderX86::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   locations->SetInAt(0, Location::RequiresRegister());
diff --git a/compiler/optimizing/intrinsics_x86_64.cc b/compiler/optimizing/intrinsics_x86_64.cc
index ae889744ad..96f6eaaf33 100644
--- a/compiler/optimizing/intrinsics_x86_64.cc
+++ b/compiler/optimizing/intrinsics_x86_64.cc
@@ -1230,13 +1230,6 @@ void IntrinsicCodeGeneratorX86_64::VisitStringCompareTo(HInvoke* invoke) {
 }
 
 void IntrinsicLocationsBuilderX86_64::VisitStringEquals(HInvoke* invoke) {
-  if (kEmitCompilerReadBarrier &&
-      !StringEqualsOptimizations(invoke).GetArgumentIsString() &&
-      !StringEqualsOptimizations(invoke).GetNoReadBarrierForStringClass()) {
-    // No support for this odd case (String class is moveable, not in the boot image).
-    return;
-  }
-
   LocationSummary* locations =
       new (allocator_) LocationSummary(invoke, LocationSummary::kNoCall, kIntrinsified);
   locations->SetInAt(0, Location::RequiresRegister());