diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 62026f3..d90bdd4 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -142,24 +142,22 @@
 
 class BoundsCheckSlowPathARM : public SlowPathCodeARM {
  public:
-  BoundsCheckSlowPathARM(HBoundsCheck* instruction,
-                         Location index_location,
-                         Location length_location)
-      : instruction_(instruction),
-        index_location_(index_location),
-        length_location_(length_location) {}
+  explicit BoundsCheckSlowPathARM(HBoundsCheck* instruction)
+      : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
+    LocationSummary* locations = instruction_->GetLocations();
+
     __ Bind(GetEntryLabel());
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        index_location_,
+        locations->InAt(0),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimInt,
-        length_location_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimInt);
     arm_codegen->InvokeRuntime(
@@ -172,8 +170,6 @@
 
  private:
   HBoundsCheck* const instruction_;
-  const Location index_location_;
-  const Location length_location_;
 
   DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathARM);
 };
@@ -263,17 +259,12 @@
 
 class TypeCheckSlowPathARM : public SlowPathCodeARM {
  public:
-  TypeCheckSlowPathARM(HInstruction* instruction,
-                       Location class_to_check,
-                       Location object_class,
-                       uint32_t dex_pc)
-      : instruction_(instruction),
-        class_to_check_(class_to_check),
-        object_class_(object_class),
-        dex_pc_(dex_pc) {}
+  explicit TypeCheckSlowPathARM(HInstruction* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     LocationSummary* locations = instruction_->GetLocations();
+    Location object_class = instruction_->IsCheckCast() ? locations->GetTemp(0)
+                                                        : locations->Out();
     DCHECK(instruction_->IsCheckCast()
            || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
 
@@ -285,20 +276,25 @@
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        class_to_check_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimNot,
-        object_class_,
+        object_class,
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimNot);
 
     if (instruction_->IsInstanceOf()) {
-      arm_codegen->InvokeRuntime(
-          QUICK_ENTRY_POINT(pInstanceofNonTrivial), instruction_, dex_pc_, this);
+      arm_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pInstanceofNonTrivial),
+                                 instruction_,
+                                 instruction_->GetDexPc(),
+                                 this);
       arm_codegen->Move32(locations->Out(), Location::RegisterLocation(R0));
     } else {
       DCHECK(instruction_->IsCheckCast());
-      arm_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc_, this);
+      arm_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast),
+                                 instruction_,
+                                 instruction_->GetDexPc(),
+                                 this);
     }
 
     RestoreLiveRegisters(codegen, locations);
@@ -309,9 +305,6 @@
 
  private:
   HInstruction* const instruction_;
-  const Location class_to_check_;
-  const Location object_class_;
-  uint32_t dex_pc_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathARM);
 };
@@ -3901,8 +3894,8 @@
 
 void InstructionCodeGeneratorARM::VisitBoundsCheck(HBoundsCheck* instruction) {
   LocationSummary* locations = instruction->GetLocations();
-  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM(
-      instruction, locations->InAt(0), locations->InAt(1));
+  SlowPathCodeARM* slow_path =
+      new (GetGraph()->GetArena()) BoundsCheckSlowPathARM(instruction);
   codegen_->AddSlowPath(slow_path);
 
   Register index = locations->InAt(0).AsRegister<Register>();
@@ -4346,6 +4339,7 @@
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
   // The out register is used as a temporary, so it overlaps with the inputs.
+  // Note that TypeCheckSlowPathARM uses this register too.
   locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
 }
 
@@ -4375,8 +4369,7 @@
   } else {
     // If the classes are not equal, we go into a slow path.
     DCHECK(locations->OnlyCallsOnSlowPath());
-    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
-        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
+    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(instruction);
     codegen_->AddSlowPath(slow_path);
     __ b(slow_path->GetEntryLabel(), NE);
     __ LoadImmediate(out, 1);
@@ -4399,6 +4392,7 @@
       instruction, LocationSummary::kCallOnSlowPath);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
+  // Note that TypeCheckSlowPathARM uses this register too.
   locations->AddTemp(Location::RequiresRegister());
 }
 
@@ -4409,8 +4403,8 @@
   Register temp = locations->GetTemp(0).AsRegister<Register>();
   uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
 
-  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
-      instruction, locations->InAt(1), locations->GetTemp(0), instruction->GetDexPc());
+  SlowPathCodeARM* slow_path =
+      new (GetGraph()->GetArena()) TypeCheckSlowPathARM(instruction);
   codegen_->AddSlowPath(slow_path);
 
   // avoid null check if we know obj is not null.
diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index 25b3ea2..8035461 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -191,23 +191,19 @@
 
 class BoundsCheckSlowPathARM64 : public SlowPathCodeARM64 {
  public:
-  BoundsCheckSlowPathARM64(HBoundsCheck* instruction,
-                           Location index_location,
-                           Location length_location)
-      : instruction_(instruction),
-        index_location_(index_location),
-        length_location_(length_location) {}
-
+  explicit BoundsCheckSlowPathARM64(HBoundsCheck* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
+    LocationSummary* locations = instruction_->GetLocations();
     CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
+
     __ Bind(GetEntryLabel());
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        index_location_, LocationFrom(calling_convention.GetRegisterAt(0)), Primitive::kPrimInt,
-        length_location_, LocationFrom(calling_convention.GetRegisterAt(1)), Primitive::kPrimInt);
+        locations->InAt(0), LocationFrom(calling_convention.GetRegisterAt(0)), Primitive::kPrimInt,
+        locations->InAt(1), LocationFrom(calling_convention.GetRegisterAt(1)), Primitive::kPrimInt);
     arm64_codegen->InvokeRuntime(
         QUICK_ENTRY_POINT(pThrowArrayBounds), instruction_, instruction_->GetDexPc(), this);
     CheckEntrypointTypes<kQuickThrowArrayBounds, void, int32_t, int32_t>();
@@ -219,8 +215,6 @@
 
  private:
   HBoundsCheck* const instruction_;
-  const Location index_location_;
-  const Location length_location_;
 
   DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathARM64);
 };
@@ -403,20 +397,17 @@
 
 class TypeCheckSlowPathARM64 : public SlowPathCodeARM64 {
  public:
-  TypeCheckSlowPathARM64(HInstruction* instruction,
-                         Location class_to_check,
-                         Location object_class,
-                         uint32_t dex_pc)
-      : instruction_(instruction),
-        class_to_check_(class_to_check),
-        object_class_(object_class),
-        dex_pc_(dex_pc) {}
+  explicit TypeCheckSlowPathARM64(HInstruction* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     LocationSummary* locations = instruction_->GetLocations();
+    Location class_to_check = locations->InAt(1);
+    Location object_class = instruction_->IsCheckCast() ? locations->GetTemp(0)
+                                                        : locations->Out();
     DCHECK(instruction_->IsCheckCast()
            || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
     CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
+    uint32_t dex_pc = instruction_->GetDexPc();
 
     __ Bind(GetEntryLabel());
     SaveLiveRegisters(codegen, locations);
@@ -425,12 +416,12 @@
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        class_to_check_, LocationFrom(calling_convention.GetRegisterAt(0)), Primitive::kPrimNot,
-        object_class_, LocationFrom(calling_convention.GetRegisterAt(1)), Primitive::kPrimNot);
+        class_to_check, LocationFrom(calling_convention.GetRegisterAt(0)), Primitive::kPrimNot,
+        object_class, LocationFrom(calling_convention.GetRegisterAt(1)), Primitive::kPrimNot);
 
     if (instruction_->IsInstanceOf()) {
       arm64_codegen->InvokeRuntime(
-          QUICK_ENTRY_POINT(pInstanceofNonTrivial), instruction_, dex_pc_, this);
+          QUICK_ENTRY_POINT(pInstanceofNonTrivial), instruction_, dex_pc, this);
       Primitive::Type ret_type = instruction_->GetType();
       Location ret_loc = calling_convention.GetReturnLocation(ret_type);
       arm64_codegen->MoveLocation(locations->Out(), ret_loc, ret_type);
@@ -438,7 +429,7 @@
                            const mirror::Class*, const mirror::Class*>();
     } else {
       DCHECK(instruction_->IsCheckCast());
-      arm64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc_, this);
+      arm64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc, this);
       CheckEntrypointTypes<kQuickCheckCast, void, const mirror::Class*, const mirror::Class*>();
     }
 
@@ -450,9 +441,6 @@
 
  private:
   HInstruction* const instruction_;
-  const Location class_to_check_;
-  const Location object_class_;
-  uint32_t dex_pc_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathARM64);
 };
@@ -1602,9 +1590,8 @@
 }
 
 void InstructionCodeGeneratorARM64::VisitBoundsCheck(HBoundsCheck* instruction) {
-  LocationSummary* locations = instruction->GetLocations();
-  BoundsCheckSlowPathARM64* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM64(
-      instruction, locations->InAt(0), locations->InAt(1));
+  BoundsCheckSlowPathARM64* slow_path =
+      new (GetGraph()->GetArena()) BoundsCheckSlowPathARM64(instruction);
   codegen_->AddSlowPath(slow_path);
 
   __ Cmp(InputRegisterAt(instruction, 0), InputOperandAt(instruction, 1));
@@ -1616,17 +1603,17 @@
       instruction, LocationSummary::kCallOnSlowPath);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
+  // Note that TypeCheckSlowPathARM64 uses this register too.
   locations->AddTemp(Location::RequiresRegister());
 }
 
 void InstructionCodeGeneratorARM64::VisitCheckCast(HCheckCast* instruction) {
-  LocationSummary* locations = instruction->GetLocations();
   Register obj = InputRegisterAt(instruction, 0);;
   Register cls = InputRegisterAt(instruction, 1);;
   Register obj_cls = WRegisterFrom(instruction->GetLocations()->GetTemp(0));
 
-  SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM64(
-      instruction, locations->InAt(1), LocationFrom(obj_cls), instruction->GetDexPc());
+  SlowPathCodeARM64* slow_path =
+      new (GetGraph()->GetArena()) TypeCheckSlowPathARM64(instruction);
   codegen_->AddSlowPath(slow_path);
 
   // Avoid null check if we know obj is not null.
@@ -2240,6 +2227,7 @@
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
   // The output does overlap inputs.
+  // Note that TypeCheckSlowPathARM64 uses this register too.
   locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
 }
 
@@ -2269,8 +2257,7 @@
     // If the classes are not equal, we go into a slow path.
     DCHECK(locations->OnlyCallsOnSlowPath());
     SlowPathCodeARM64* slow_path =
-        new (GetGraph()->GetArena()) TypeCheckSlowPathARM64(
-        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
+        new (GetGraph()->GetArena()) TypeCheckSlowPathARM64(instruction);
     codegen_->AddSlowPath(slow_path);
     __ B(ne, slow_path->GetEntryLabel());
     __ Mov(out, 1);
diff --git a/compiler/optimizing/code_generator_mips64.cc b/compiler/optimizing/code_generator_mips64.cc
index 093d786..e4188e4 100644
--- a/compiler/optimizing/code_generator_mips64.cc
+++ b/compiler/optimizing/code_generator_mips64.cc
@@ -112,23 +112,19 @@
 
 class BoundsCheckSlowPathMIPS64 : public SlowPathCodeMIPS64 {
  public:
-  BoundsCheckSlowPathMIPS64(HBoundsCheck* instruction,
-                            Location index_location,
-                            Location length_location)
-      : instruction_(instruction),
-        index_location_(index_location),
-        length_location_(length_location) {}
+  explicit BoundsCheckSlowPathMIPS64(HBoundsCheck* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
+    LocationSummary* locations = instruction_->GetLocations();
     CodeGeneratorMIPS64* mips64_codegen = down_cast<CodeGeneratorMIPS64*>(codegen);
     __ Bind(GetEntryLabel());
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
-    codegen->EmitParallelMoves(index_location_,
+    codegen->EmitParallelMoves(locations->InAt(0),
                                Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
                                Primitive::kPrimInt,
-                               length_location_,
+                               locations->InAt(1),
                                Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
                                Primitive::kPrimInt);
     mips64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pThrowArrayBounds),
@@ -144,8 +140,6 @@
 
  private:
   HBoundsCheck* const instruction_;
-  const Location index_location_;
-  const Location length_location_;
 
   DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathMIPS64);
 };
@@ -334,17 +328,13 @@
 
 class TypeCheckSlowPathMIPS64 : public SlowPathCodeMIPS64 {
  public:
-  TypeCheckSlowPathMIPS64(HInstruction* instruction,
-                          Location class_to_check,
-                          Location object_class,
-                          uint32_t dex_pc)
-      : instruction_(instruction),
-        class_to_check_(class_to_check),
-        object_class_(object_class),
-        dex_pc_(dex_pc) {}
+  explicit TypeCheckSlowPathMIPS64(HInstruction* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     LocationSummary* locations = instruction_->GetLocations();
+    Location object_class = instruction_->IsCheckCast() ? locations->GetTemp(0)
+                                                        : locations->Out();
+    uint32_t dex_pc = instruction_->GetDexPc();
     DCHECK(instruction_->IsCheckCast()
            || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
     CodeGeneratorMIPS64* mips64_codegen = down_cast<CodeGeneratorMIPS64*>(codegen);
@@ -355,17 +345,17 @@
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
-    codegen->EmitParallelMoves(class_to_check_,
+    codegen->EmitParallelMoves(locations->InAt(1),
                                Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
                                Primitive::kPrimNot,
-                               object_class_,
+                               object_class,
                                Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
                                Primitive::kPrimNot);
 
     if (instruction_->IsInstanceOf()) {
       mips64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pInstanceofNonTrivial),
                                     instruction_,
-                                    dex_pc_,
+                                    dex_pc,
                                     this);
       Primitive::Type ret_type = instruction_->GetType();
       Location ret_loc = calling_convention.GetReturnLocation(ret_type);
@@ -376,7 +366,7 @@
                            const mirror::Class*>();
     } else {
       DCHECK(instruction_->IsCheckCast());
-      mips64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc_, this);
+      mips64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc, this);
       CheckEntrypointTypes<kQuickCheckCast, void, const mirror::Class*, const mirror::Class*>();
     }
 
@@ -388,9 +378,6 @@
 
  private:
   HInstruction* const instruction_;
-  const Location class_to_check_;
-  const Location object_class_;
-  uint32_t dex_pc_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathMIPS64);
 };
@@ -1590,10 +1577,8 @@
 
 void InstructionCodeGeneratorMIPS64::VisitBoundsCheck(HBoundsCheck* instruction) {
   LocationSummary* locations = instruction->GetLocations();
-  BoundsCheckSlowPathMIPS64* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathMIPS64(
-      instruction,
-      locations->InAt(0),
-      locations->InAt(1));
+  BoundsCheckSlowPathMIPS64* slow_path =
+      new (GetGraph()->GetArena()) BoundsCheckSlowPathMIPS64(instruction);
   codegen_->AddSlowPath(slow_path);
 
   GpuRegister index = locations->InAt(0).AsRegister<GpuRegister>();
@@ -1616,6 +1601,7 @@
       LocationSummary::kCallOnSlowPath);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
+  // Note that TypeCheckSlowPathMIPS64 uses this register too.
   locations->AddTemp(Location::RequiresRegister());
 }
 
@@ -1625,11 +1611,8 @@
   GpuRegister cls = locations->InAt(1).AsRegister<GpuRegister>();
   GpuRegister obj_cls = locations->GetTemp(0).AsRegister<GpuRegister>();
 
-  SlowPathCodeMIPS64* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathMIPS64(
-      instruction,
-      locations->InAt(1),
-      Location::RegisterLocation(obj_cls),
-      instruction->GetDexPc());
+  SlowPathCodeMIPS64* slow_path =
+      new (GetGraph()->GetArena()) TypeCheckSlowPathMIPS64(instruction);
   codegen_->AddSlowPath(slow_path);
 
   // TODO: avoid this check if we know obj is not null.
@@ -2270,6 +2253,7 @@
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::RequiresRegister());
   // The output does overlap inputs.
+  // Note that TypeCheckSlowPathMIPS64 uses this register too.
   locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
 }
 
@@ -2296,10 +2280,7 @@
     // If the classes are not equal, we go into a slow path.
     DCHECK(locations->OnlyCallsOnSlowPath());
     SlowPathCodeMIPS64* slow_path =
-        new (GetGraph()->GetArena()) TypeCheckSlowPathMIPS64(instruction,
-                                                             locations->InAt(1),
-                                                             locations->Out(),
-                                                             instruction->GetDexPc());
+        new (GetGraph()->GetArena()) TypeCheckSlowPathMIPS64(instruction);
     codegen_->AddSlowPath(slow_path);
     __ Bnec(out, cls, slow_path->GetEntryLabel());
     __ LoadConst32(out, 1);
diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 72c690d..e8aa61d 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -116,24 +116,20 @@
 
 class BoundsCheckSlowPathX86 : public SlowPathCodeX86 {
  public:
-  BoundsCheckSlowPathX86(HBoundsCheck* instruction,
-                         Location index_location,
-                         Location length_location)
-      : instruction_(instruction),
-        index_location_(index_location),
-        length_location_(length_location) {}
+  explicit BoundsCheckSlowPathX86(HBoundsCheck* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
+    LocationSummary* locations = instruction_->GetLocations();
     CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
     __ Bind(GetEntryLabel());
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     x86_codegen->EmitParallelMoves(
-        index_location_,
+        locations->InAt(0),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimInt,
-        length_location_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimInt);
     x86_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pThrowArrayBounds),
@@ -148,8 +144,6 @@
 
  private:
   HBoundsCheck* const instruction_;
-  const Location index_location_;
-  const Location length_location_;
 
   DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathX86);
 };
@@ -280,15 +274,12 @@
 
 class TypeCheckSlowPathX86 : public SlowPathCodeX86 {
  public:
-  TypeCheckSlowPathX86(HInstruction* instruction,
-                       Location class_to_check,
-                       Location object_class)
-      : instruction_(instruction),
-        class_to_check_(class_to_check),
-        object_class_(object_class) {}
+  explicit TypeCheckSlowPathX86(HInstruction* instruction) : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     LocationSummary* locations = instruction_->GetLocations();
+    Location object_class = instruction_->IsCheckCast() ? locations->GetTemp(0)
+                                                        : locations->Out();
     DCHECK(instruction_->IsCheckCast()
            || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
 
@@ -300,10 +291,10 @@
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     x86_codegen->EmitParallelMoves(
-        class_to_check_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimNot,
-        object_class_,
+        object_class,
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimNot);
 
@@ -332,8 +323,6 @@
 
  private:
   HInstruction* const instruction_;
-  const Location class_to_check_;
-  const Location object_class_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathX86);
 };
@@ -4357,7 +4346,7 @@
   Location index_loc = locations->InAt(0);
   Location length_loc = locations->InAt(1);
   SlowPathCodeX86* slow_path =
-    new (GetGraph()->GetArena()) BoundsCheckSlowPathX86(instruction, index_loc, length_loc);
+    new (GetGraph()->GetArena()) BoundsCheckSlowPathX86(instruction);
 
   if (length_loc.IsConstant()) {
     int32_t length = CodeGenerator::GetInt32ValueOf(length_loc.GetConstant());
@@ -4830,6 +4819,7 @@
   LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::Any());
+  // Note that TypeCheckSlowPathX86 uses this register too.
   locations->SetOut(Location::RequiresRegister());
 }
 
@@ -4866,8 +4856,7 @@
   } else {
     // If the classes are not equal, we go into a slow path.
     DCHECK(locations->OnlyCallsOnSlowPath());
-    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86(
-        instruction, locations->InAt(1), locations->Out());
+    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86(instruction);
     codegen_->AddSlowPath(slow_path);
     __ j(kNotEqual, slow_path->GetEntryLabel());
     __ movl(out, Immediate(1));
@@ -4890,6 +4879,7 @@
       instruction, LocationSummary::kCallOnSlowPath);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::Any());
+  // Note that TypeCheckSlowPathX86 uses this register too.
   locations->AddTemp(Location::RequiresRegister());
 }
 
@@ -4899,8 +4889,8 @@
   Location cls = locations->InAt(1);
   Register temp = locations->GetTemp(0).AsRegister<Register>();
   uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
-  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86(
-      instruction, locations->InAt(1), locations->GetTemp(0));
+  SlowPathCodeX86* slow_path =
+      new (GetGraph()->GetArena()) TypeCheckSlowPathX86(instruction);
   codegen_->AddSlowPath(slow_path);
 
   // Avoid null check if we know obj is not null.
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 820ec78..ff52f4f 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -170,24 +170,21 @@
 
 class BoundsCheckSlowPathX86_64 : public SlowPathCodeX86_64 {
  public:
-  BoundsCheckSlowPathX86_64(HBoundsCheck* instruction,
-                            Location index_location,
-                            Location length_location)
-      : instruction_(instruction),
-        index_location_(index_location),
-        length_location_(length_location) {}
+  explicit BoundsCheckSlowPathX86_64(HBoundsCheck* instruction)
+    : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
+    LocationSummary* locations = instruction_->GetLocations();
     CodeGeneratorX86_64* x64_codegen = down_cast<CodeGeneratorX86_64*>(codegen);
     __ Bind(GetEntryLabel());
     // We're moving two locations to locations that could overlap, so we need a parallel
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        index_location_,
+        locations->InAt(0),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimInt,
-        length_location_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimInt);
     x64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pThrowArrayBounds),
@@ -200,8 +197,6 @@
 
  private:
   HBoundsCheck* const instruction_;
-  const Location index_location_;
-  const Location length_location_;
 
   DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathX86_64);
 };
@@ -293,17 +288,14 @@
 
 class TypeCheckSlowPathX86_64 : public SlowPathCodeX86_64 {
  public:
-  TypeCheckSlowPathX86_64(HInstruction* instruction,
-                          Location class_to_check,
-                          Location object_class,
-                          uint32_t dex_pc)
-      : instruction_(instruction),
-        class_to_check_(class_to_check),
-        object_class_(object_class),
-        dex_pc_(dex_pc) {}
+  explicit TypeCheckSlowPathX86_64(HInstruction* instruction)
+      : instruction_(instruction) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     LocationSummary* locations = instruction_->GetLocations();
+    Location object_class = instruction_->IsCheckCast() ? locations->GetTemp(0)
+                                                        : locations->Out();
+    uint32_t dex_pc = instruction_->GetDexPc();
     DCHECK(instruction_->IsCheckCast()
            || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
 
@@ -315,23 +307,23 @@
     // move resolver.
     InvokeRuntimeCallingConvention calling_convention;
     codegen->EmitParallelMoves(
-        class_to_check_,
+        locations->InAt(1),
         Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
         Primitive::kPrimNot,
-        object_class_,
+        object_class,
         Location::RegisterLocation(calling_convention.GetRegisterAt(1)),
         Primitive::kPrimNot);
 
     if (instruction_->IsInstanceOf()) {
       x64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pInstanceofNonTrivial),
                                  instruction_,
-                                 dex_pc_,
+                                 dex_pc,
                                  this);
     } else {
       DCHECK(instruction_->IsCheckCast());
       x64_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast),
                                  instruction_,
-                                 dex_pc_,
+                                 dex_pc,
                                  this);
     }
 
@@ -347,9 +339,6 @@
 
  private:
   HInstruction* const instruction_;
-  const Location class_to_check_;
-  const Location object_class_;
-  const uint32_t dex_pc_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathX86_64);
 };
@@ -4195,7 +4184,7 @@
   Location index_loc = locations->InAt(0);
   Location length_loc = locations->InAt(1);
   SlowPathCodeX86_64* slow_path =
-    new (GetGraph()->GetArena()) BoundsCheckSlowPathX86_64(instruction, index_loc, length_loc);
+    new (GetGraph()->GetArena()) BoundsCheckSlowPathX86_64(instruction);
 
   if (length_loc.IsConstant()) {
     int32_t length = CodeGenerator::GetInt32ValueOf(length_loc.GetConstant());
@@ -4653,6 +4642,7 @@
   LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::Any());
+  // Note that TypeCheckSlowPathX86_64 uses this register too.
   locations->SetOut(Location::RequiresRegister());
 }
 
@@ -4688,8 +4678,7 @@
   } else {
     // If the classes are not equal, we go into a slow path.
     DCHECK(locations->OnlyCallsOnSlowPath());
-    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86_64(
-        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
+    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86_64(instruction);
     codegen_->AddSlowPath(slow_path);
     __ j(kNotEqual, slow_path->GetEntryLabel());
     __ movl(out, Immediate(1));
@@ -4712,6 +4701,7 @@
       instruction, LocationSummary::kCallOnSlowPath);
   locations->SetInAt(0, Location::RequiresRegister());
   locations->SetInAt(1, Location::Any());
+  // Note that TypeCheckSlowPathX86_64 uses this register too.
   locations->AddTemp(Location::RequiresRegister());
 }
 
@@ -4721,8 +4711,8 @@
   Location cls = locations->InAt(1);
   CpuRegister temp = locations->GetTemp(0).AsRegister<CpuRegister>();
   uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
-  SlowPathCodeX86_64* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86_64(
-      instruction, locations->InAt(1), locations->GetTemp(0), instruction->GetDexPc());
+  SlowPathCodeX86_64* slow_path =
+      new (GetGraph()->GetArena()) TypeCheckSlowPathX86_64(instruction);
   codegen_->AddSlowPath(slow_path);
 
   // Avoid null check if we know obj is not null.