diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index b44c5ba..d93ef1b 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -360,8 +360,7 @@
 
 class SuspendCheckSlowPathARM64 : public SlowPathCodeARM64 {
  public:
-  explicit SuspendCheckSlowPathARM64(HSuspendCheck* instruction,
-                                     HBasicBlock* successor)
+  SuspendCheckSlowPathARM64(HSuspendCheck* instruction, HBasicBlock* successor)
       : instruction_(instruction), successor_(successor) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
diff --git a/compiler/optimizing/code_generator_arm64.h b/compiler/optimizing/code_generator_arm64.h
index 2c61038..ac7ee10 100644
--- a/compiler/optimizing/code_generator_arm64.h
+++ b/compiler/optimizing/code_generator_arm64.h
@@ -191,7 +191,7 @@
 
 class LocationsBuilderARM64 : public HGraphVisitor {
  public:
-  explicit LocationsBuilderARM64(HGraph* graph, CodeGeneratorARM64* codegen)
+  LocationsBuilderARM64(HGraph* graph, CodeGeneratorARM64* codegen)
       : HGraphVisitor(graph), codegen_(codegen) {}
 
 #define DECLARE_VISIT_INSTRUCTION(name, super) \
diff --git a/compiler/optimizing/code_generator_mips64.cc b/compiler/optimizing/code_generator_mips64.cc
index b6ebeb4..4cee4a3 100644
--- a/compiler/optimizing/code_generator_mips64.cc
+++ b/compiler/optimizing/code_generator_mips64.cc
@@ -294,8 +294,7 @@
 
 class SuspendCheckSlowPathMIPS64 : public SlowPathCodeMIPS64 {
  public:
-  explicit SuspendCheckSlowPathMIPS64(HSuspendCheck* instruction,
-                                      HBasicBlock* successor)
+  SuspendCheckSlowPathMIPS64(HSuspendCheck* instruction, HBasicBlock* successor)
       : instruction_(instruction), successor_(successor) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 4efdbb9..38a7c53 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -93,7 +93,7 @@
 
 class DivRemMinusOneSlowPathX86 : public SlowPathCodeX86 {
  public:
-  explicit DivRemMinusOneSlowPathX86(Register reg, bool is_div) : reg_(reg), is_div_(is_div) {}
+  DivRemMinusOneSlowPathX86(Register reg, bool is_div) : reg_(reg), is_div_(is_div) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     __ Bind(GetEntryLabel());
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 1585104..18ab595 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -95,7 +95,7 @@
 
 class DivRemMinusOneSlowPathX86_64 : public SlowPathCodeX86_64 {
  public:
-  explicit DivRemMinusOneSlowPathX86_64(Register reg, Primitive::Type type, bool is_div)
+  DivRemMinusOneSlowPathX86_64(Register reg, Primitive::Type type, bool is_div)
       : cpu_reg_(CpuRegister(reg)), type_(type), is_div_(is_div) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
@@ -129,7 +129,7 @@
 
 class SuspendCheckSlowPathX86_64 : public SlowPathCodeX86_64 {
  public:
-  explicit SuspendCheckSlowPathX86_64(HSuspendCheck* instruction, HBasicBlock* successor)
+  SuspendCheckSlowPathX86_64(HSuspendCheck* instruction, HBasicBlock* successor)
       : instruction_(instruction), successor_(successor) {}
 
   void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
diff --git a/compiler/optimizing/intrinsics_arm.h b/compiler/optimizing/intrinsics_arm.h
index 8bfb7d4..38c2ef4 100644
--- a/compiler/optimizing/intrinsics_arm.h
+++ b/compiler/optimizing/intrinsics_arm.h
@@ -33,8 +33,7 @@
 
 class IntrinsicLocationsBuilderARM FINAL : public IntrinsicVisitor {
  public:
-  explicit IntrinsicLocationsBuilderARM(ArenaAllocator* arena,
-                                        const ArmInstructionSetFeatures& features)
+  IntrinsicLocationsBuilderARM(ArenaAllocator* arena, const ArmInstructionSetFeatures& features)
       : arena_(arena), features_(features) {}
 
   // Define visitor methods.
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index ca2c998..718469f 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -3105,7 +3105,7 @@
 
 class HNeg : public HUnaryOperation {
  public:
-  explicit HNeg(Primitive::Type result_type, HInstruction* input)
+  HNeg(Primitive::Type result_type, HInstruction* input)
       : HUnaryOperation(result_type, input) {}
 
   template <typename T> T Compute(T x) const { return -x; }
@@ -3535,7 +3535,7 @@
 
 class HNot : public HUnaryOperation {
  public:
-  explicit HNot(Primitive::Type result_type, HInstruction* input)
+  HNot(Primitive::Type result_type, HInstruction* input)
       : HUnaryOperation(result_type, input) {}
 
   bool CanBeMoved() const OVERRIDE { return true; }
@@ -4173,7 +4173,7 @@
  */
 class HClinitCheck : public HExpression<1> {
  public:
-  explicit HClinitCheck(HLoadClass* constant, uint32_t dex_pc)
+  HClinitCheck(HLoadClass* constant, uint32_t dex_pc)
       : HExpression(
           Primitive::kPrimNot,
           SideEffects::AllWrites()),  // assume write on all fields/arrays