A64: Tidy up Push and Pop TODOs.

src/a64/full-codegen-a64.cc

Index: src/a64/full-codegen-a64.cc
diff --git a/src/a64/full-codegen-a64.cc b/src/a64/full-codegen-a64.cc
index ec5d3397818dc0e11254ac8af21ef9ec5516acae..41ee16e1a92be4aadaed95a3435e2722c9524890 100644
--- a/src/a64/full-codegen-a64.cc
+++ b/src/a64/full-codegen-a64.cc
@@ -183,7 +183,7 @@ void FullCodeGenerator::Generate() {
 
     if (locals_count > 0) {
       __ LoadRoot(x10, Heap::kUndefinedValueRootIndex);
-      __ PushMultipleTimes(locals_count, x10);
+      __ PushMultipleTimes(x10, locals_count);
     }
   }
 
@@ -4622,20 +4622,11 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
   __ Ldr(w10, FieldMemOperand(x10,
                               SharedFunctionInfo::kFormalParameterCountOffset));
   __ LoadRoot(the_hole, Heap::kTheHoleValueRootIndex);
-
-  // TODO(jbramley): Write a variant of PushMultipleTimes which takes a register
-  // instead of a constant count, and use it to replace this loop.
-  Label push_argument_holes, push_frame;
-  __ Bind(&push_argument_holes);
-  __ Subs(w10, w10, 1);
-  __ B(mi, &push_frame);
-  __ Push(the_hole);
-  __ B(&push_argument_holes);
+  __ PushMultipleTimes(the_hole, w10);
 
   // Enter a new JavaScript frame, and initialize its slots as they were when
   // the generator was suspended.
   Label resume_frame;
-  __ Bind(&push_frame);
   __ Bl(&resume_frame);
   __ B(&done);
 
@@ -4672,16 +4663,8 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
 
   // Otherwise, we push holes for the operand stack and call the runtime to fix
   // up the stack and the handlers.
-  // TODO(jbramley): Write a variant of PushMultipleTimes which takes a register
-  // instead of a constant count, and use it to replace this loop.
-  Label push_operand_holes, call_resume;
-  __ Bind(&push_operand_holes);
-  __ Subs(operand_stack_size, operand_stack_size, 1);
-  __ B(mi, &call_resume);
-  __ Push(the_hole);
-  __ B(&push_operand_holes);
-
-  __ Bind(&call_resume);
+  __ PushMultipleTimes(the_hole, operand_stack_size);
+
   __ Mov(x10, Operand(Smi::FromInt(resume_mode)));
   __ Push(generator_object, result_register(), x10);
   __ CallRuntime(Runtime::kResumeJSGeneratorObject, 3);