Use ATTRIBUTE_UNUSED more.

Use it in lieu of UNUSED(), which had some incorrect uses.

Change-Id: If247dce58b72056f6eea84968e7196f0b5bef4da
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index bedaa55..bf570f5 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -1050,8 +1050,7 @@
   exit->SetLocations(nullptr);
 }
 
-void InstructionCodeGeneratorX86_64::VisitExit(HExit* exit) {
-  UNUSED(exit);
+void InstructionCodeGeneratorX86_64::VisitExit(HExit* exit ATTRIBUTE_UNUSED) {
 }
 
 void InstructionCodeGeneratorX86_64::GenerateFPJumps(HCondition* cond,
@@ -1279,9 +1278,8 @@
   local->SetLocations(nullptr);
 }
 
-void InstructionCodeGeneratorX86_64::VisitLoadLocal(HLoadLocal* load) {
+void InstructionCodeGeneratorX86_64::VisitLoadLocal(HLoadLocal* load ATTRIBUTE_UNUSED) {
   // Nothing to do, this is driven by the code generator.
-  UNUSED(load);
 }
 
 void LocationsBuilderX86_64::VisitStoreLocal(HStoreLocal* store) {
@@ -1308,8 +1306,7 @@
   }
 }
 
-void InstructionCodeGeneratorX86_64::VisitStoreLocal(HStoreLocal* store) {
-  UNUSED(store);
+void InstructionCodeGeneratorX86_64::VisitStoreLocal(HStoreLocal* store ATTRIBUTE_UNUSED) {
 }
 
 void LocationsBuilderX86_64::VisitCondition(HCondition* cond) {
@@ -1614,9 +1611,8 @@
   locations->SetOut(Location::ConstantLocation(constant));
 }
 
-void InstructionCodeGeneratorX86_64::VisitIntConstant(HIntConstant* constant) {
+void InstructionCodeGeneratorX86_64::VisitIntConstant(HIntConstant* constant ATTRIBUTE_UNUSED) {
   // Will be generated at use site.
-  UNUSED(constant);
 }
 
 void LocationsBuilderX86_64::VisitNullConstant(HNullConstant* constant) {
@@ -1625,9 +1621,8 @@
   locations->SetOut(Location::ConstantLocation(constant));
 }
 
-void InstructionCodeGeneratorX86_64::VisitNullConstant(HNullConstant* constant) {
+void InstructionCodeGeneratorX86_64::VisitNullConstant(HNullConstant* constant ATTRIBUTE_UNUSED) {
   // Will be generated at use site.
-  UNUSED(constant);
 }
 
 void LocationsBuilderX86_64::VisitLongConstant(HLongConstant* constant) {
@@ -1636,9 +1631,8 @@
   locations->SetOut(Location::ConstantLocation(constant));
 }
 
-void InstructionCodeGeneratorX86_64::VisitLongConstant(HLongConstant* constant) {
+void InstructionCodeGeneratorX86_64::VisitLongConstant(HLongConstant* constant ATTRIBUTE_UNUSED) {
   // Will be generated at use site.
-  UNUSED(constant);
 }
 
 void LocationsBuilderX86_64::VisitFloatConstant(HFloatConstant* constant) {
@@ -1647,9 +1641,8 @@
   locations->SetOut(Location::ConstantLocation(constant));
 }
 
-void InstructionCodeGeneratorX86_64::VisitFloatConstant(HFloatConstant* constant) {
+void InstructionCodeGeneratorX86_64::VisitFloatConstant(HFloatConstant* constant ATTRIBUTE_UNUSED) {
   // Will be generated at use site.
-  UNUSED(constant);
 }
 
 void LocationsBuilderX86_64::VisitDoubleConstant(HDoubleConstant* constant) {
@@ -1658,9 +1651,9 @@
   locations->SetOut(Location::ConstantLocation(constant));
 }
 
-void InstructionCodeGeneratorX86_64::VisitDoubleConstant(HDoubleConstant* constant) {
+void InstructionCodeGeneratorX86_64::VisitDoubleConstant(
+    HDoubleConstant* constant ATTRIBUTE_UNUSED) {
   // Will be generated at use site.
-  UNUSED(constant);
 }
 
 void LocationsBuilderX86_64::VisitMemoryBarrier(HMemoryBarrier* memory_barrier) {
@@ -1675,8 +1668,7 @@
   ret->SetLocations(nullptr);
 }
 
-void InstructionCodeGeneratorX86_64::VisitReturnVoid(HReturnVoid* ret) {
-  UNUSED(ret);
+void InstructionCodeGeneratorX86_64::VisitReturnVoid(HReturnVoid* ret ATTRIBUTE_UNUSED) {
   codegen_->GenerateFrameExit();
 }
 
@@ -3630,8 +3622,7 @@
   locations->SetOut(Location::Any());
 }
 
-void InstructionCodeGeneratorX86_64::VisitPhi(HPhi* instruction) {
-  UNUSED(instruction);
+void InstructionCodeGeneratorX86_64::VisitPhi(HPhi* instruction ATTRIBUTE_UNUSED) {
   LOG(FATAL) << "Unimplemented";
 }
 
@@ -4451,13 +4442,11 @@
   temp->SetLocations(nullptr);
 }
 
-void InstructionCodeGeneratorX86_64::VisitTemporary(HTemporary* temp) {
+void InstructionCodeGeneratorX86_64::VisitTemporary(HTemporary* temp ATTRIBUTE_UNUSED) {
   // Nothing to do, this is driven by the code generator.
-  UNUSED(temp);
 }
 
-void LocationsBuilderX86_64::VisitParallelMove(HParallelMove* instruction) {
-  UNUSED(instruction);
+void LocationsBuilderX86_64::VisitParallelMove(HParallelMove* instruction ATTRIBUTE_UNUSED) {
   LOG(FATAL) << "Unimplemented";
 }
 
@@ -5332,15 +5321,13 @@
   }
 }
 
-void LocationsBuilderX86_64::VisitBoundType(HBoundType* instruction) {
+void LocationsBuilderX86_64::VisitBoundType(HBoundType* instruction ATTRIBUTE_UNUSED) {
   // Nothing to do, this should be removed during prepare for register allocator.
-  UNUSED(instruction);
   LOG(FATAL) << "Unreachable";
 }
 
-void InstructionCodeGeneratorX86_64::VisitBoundType(HBoundType* instruction) {
+void InstructionCodeGeneratorX86_64::VisitBoundType(HBoundType* instruction ATTRIBUTE_UNUSED) {
   // Nothing to do, this should be removed during prepare for register allocator.
-  UNUSED(instruction);
   LOG(FATAL) << "Unreachable";
 }