diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index 05e5d7b..d6295db 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -30,7 +30,7 @@
 namespace art {
 
 void CodeGenerator::Compile(CodeAllocator* allocator) {
-  frame_size_ = GetGraph()->GetMaximumNumberOfOutVRegs() * kWordSize;
+  frame_size_ = GetGraph()->GetMaximumNumberOfOutVRegs() * GetWordSize();
   const GrowableArray<HBasicBlock*>* blocks = GetGraph()->GetBlocks();
   DCHECK(blocks->Get(0) == GetGraph()->GetEntryBlock());
   DCHECK(GoesToNextBlock(GetGraph()->GetEntryBlock(), blocks->Get(1)));
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 01bbcc0..e144733 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -145,6 +145,7 @@
   virtual HGraphVisitor* GetLocationBuilder() = 0;
   virtual HGraphVisitor* GetInstructionVisitor() = 0;
   virtual Assembler* GetAssembler() = 0;
+  virtual size_t GetWordSize() const = 0;
 
   uint32_t GetFrameSize() const { return frame_size_; }
   void SetFrameSize(uint32_t size) { frame_size_ = size; }
diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 0aeeef7..cb77f57 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -39,14 +39,14 @@
   __ PushList((1 << LR));
 
   // Add the current ART method to the frame size and the return PC.
-  SetFrameSize(RoundUp(GetFrameSize() + 2 * kWordSize, kStackAlignment));
+  SetFrameSize(RoundUp(GetFrameSize() + 2 * kArmWordSize, kStackAlignment));
   // The retrn PC has already been pushed on the stack.
-  __ AddConstant(SP, -(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kWordSize));
+  __ AddConstant(SP, -(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize));
   __ str(R0, Address(SP, 0));
 }
 
 void CodeGeneratorARM::GenerateFrameExit() {
-  __ AddConstant(SP, GetFrameSize() - kNumberOfPushedRegistersAtEntry * kWordSize);
+  __ AddConstant(SP, GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize);
   __ PopList((1 << PC));
 }
 
@@ -55,7 +55,7 @@
 }
 
 int32_t CodeGeneratorARM::GetStackSlot(HLocal* local) const {
-  return (GetGraph()->GetMaximumNumberOfOutVRegs() + local->GetRegNumber()) * kWordSize;
+  return (GetGraph()->GetMaximumNumberOfOutVRegs() + local->GetRegNumber()) * kArmWordSize;
 }
 
 void CodeGeneratorARM::Move(HInstruction* instruction, Location location, HInstruction* move_for) {
@@ -134,7 +134,7 @@
 
 void InstructionCodeGeneratorARM::VisitLocal(HLocal* local) {
   DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
-  codegen_->SetFrameSize(codegen_->GetFrameSize() + kWordSize);
+  codegen_->SetFrameSize(codegen_->GetFrameSize() + kArmWordSize);
 }
 
 void LocationsBuilderARM::VisitLoadLocal(HLoadLocal* load) {
@@ -235,7 +235,7 @@
 void InstructionCodeGeneratorARM::VisitInvokeStatic(HInvokeStatic* invoke) {
   Register temp = invoke->GetLocations()->GetTemp(0).reg<Register>();
   size_t index_in_cache = mirror::Array::DataOffset(sizeof(mirror::Object*)).Int32Value() +
-      invoke->GetIndexInDexCache() * kWordSize;
+      invoke->GetIndexInDexCache() * kArmWordSize;
 
   // TODO: Implement all kinds of calls:
   // 1) boot -> boot
@@ -312,7 +312,7 @@
   LoadCurrentMethod(calling_convention.GetRegisterAt(1));
   __ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
 
-  int32_t offset = QUICK_ENTRYPOINT_OFFSET(kWordSize, pAllocObjectWithAccessCheck).Int32Value();
+  int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAllocObjectWithAccessCheck).Int32Value();
   __ ldr(LR, Address(TR, offset));
   __ blx(LR);
 
diff --git a/compiler/optimizing/code_generator_arm.h b/compiler/optimizing/code_generator_arm.h
index 52d6b2e..a51d85e 100644
--- a/compiler/optimizing/code_generator_arm.h
+++ b/compiler/optimizing/code_generator_arm.h
@@ -22,12 +22,10 @@
 #include "utils/arm/assembler_arm.h"
 
 namespace art {
-
-class Assembler;
-class Label;
-
 namespace arm {
 
+static constexpr size_t kArmWordSize = 4;
+
 class LocationsBuilderARM : public HGraphVisitor {
  public:
   explicit LocationsBuilderARM(HGraph* graph) : HGraphVisitor(graph) { }
@@ -79,6 +77,10 @@
   virtual void Bind(Label* label) OVERRIDE;
   virtual void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
 
+  virtual size_t GetWordSize() const OVERRIDE {
+    return kArmWordSize;
+  }
+
   virtual HGraphVisitor* GetLocationBuilder() OVERRIDE {
     return &location_builder_;
   }
diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 882541b..c695e26 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -40,14 +40,14 @@
   core_spill_mask_ |= (1 << kFakeReturnRegister);
 
   // Add the current ART method to the frame size and the return PC.
-  SetFrameSize(RoundUp(GetFrameSize() + 2 * kWordSize, kStackAlignment));
+  SetFrameSize(RoundUp(GetFrameSize() + 2 * kX86WordSize, kStackAlignment));
   // The return PC has already been pushed on the stack.
-  __ subl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kWordSize));
+  __ subl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kX86WordSize));
   __ movl(Address(ESP, 0), EAX);
 }
 
 void CodeGeneratorX86::GenerateFrameExit() {
-  __ addl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kWordSize));
+  __ addl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kX86WordSize));
 }
 
 void CodeGeneratorX86::Bind(Label* label) {
@@ -59,7 +59,7 @@
 }
 
 int32_t CodeGeneratorX86::GetStackSlot(HLocal* local) const {
-  return (GetGraph()->GetMaximumNumberOfOutVRegs() + local->GetRegNumber()) * kWordSize;
+  return (GetGraph()->GetMaximumNumberOfOutVRegs() + local->GetRegNumber()) * kX86WordSize;
 }
 
 void CodeGeneratorX86::Move(HInstruction* instruction, Location location, HInstruction* move_for) {
@@ -122,7 +122,7 @@
 
 void InstructionCodeGeneratorX86::VisitLocal(HLocal* local) {
   DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
-  codegen_->SetFrameSize(codegen_->GetFrameSize() + kWordSize);
+  codegen_->SetFrameSize(codegen_->GetFrameSize() + kX86WordSize);
 }
 
 void LocationsBuilderX86::VisitLoadLocal(HLoadLocal* local) {
@@ -250,7 +250,7 @@
 void InstructionCodeGeneratorX86::VisitInvokeStatic(HInvokeStatic* invoke) {
   Register temp = invoke->GetLocations()->GetTemp(0).reg<Register>();
   size_t index_in_cache = mirror::Array::DataOffset(sizeof(mirror::Object*)).Int32Value() +
-      invoke->GetIndexInDexCache() * kWordSize;
+      invoke->GetIndexInDexCache() * kX86WordSize;
 
   // TODO: Implement all kinds of calls:
   // 1) boot -> boot
@@ -310,7 +310,8 @@
   __ movl(calling_convention.GetRegisterAt(0),
           Immediate(instruction->GetTypeIndex()));
 
-  __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kWordSize, pAllocObjectWithAccessCheck)));
+  __ fs()->call(
+      Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pAllocObjectWithAccessCheck)));
 
   codegen_->RecordPcInfo(instruction->GetDexPc());
 }
diff --git a/compiler/optimizing/code_generator_x86.h b/compiler/optimizing/code_generator_x86.h
index dd5044f..bba81c0 100644
--- a/compiler/optimizing/code_generator_x86.h
+++ b/compiler/optimizing/code_generator_x86.h
@@ -22,9 +22,10 @@
 #include "utils/x86/assembler_x86.h"
 
 namespace art {
-
 namespace x86 {
 
+static constexpr size_t kX86WordSize = 4;
+
 class LocationsBuilderX86 : public HGraphVisitor {
  public:
   explicit LocationsBuilderX86(HGraph* graph) : HGraphVisitor(graph) { }
@@ -77,6 +78,10 @@
   virtual void Bind(Label* label) OVERRIDE;
   virtual void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
 
+  virtual size_t GetWordSize() const OVERRIDE {
+    return kX86WordSize;
+  }
+
   virtual HGraphVisitor* GetLocationBuilder() OVERRIDE {
     return &location_builder_;
   }