ARM64: Preserve x8 and x9 when necessary.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 35 matching lines @@
 MacroAssembler::MacroAssembler(Isolate* arg_isolate,
                                byte * buffer,
                                unsigned buffer_size)
     : Assembler(arg_isolate, buffer, buffer_size),
       generating_stub_(false),
 #if DEBUG
       allow_macro_instructions_(true),
 #endif
       has_frame_(false),
       use_real_aborts_(true),
-      sp_(jssp), tmp_list_(ip0, ip1), fptmp_list_(fp_scratch1, fp_scratch2) {
+      sp_(jssp),
+      tmp_list_(DefaultTmpList()),
+      fptmp_list_(DefaultFPTmpList()) {
   if (isolate() != NULL) {
     code_object_ = Handle<Object>(isolate()->heap()->undefined_value(),
                                   isolate());
   }
 }
 
 
+CPURegList MacroAssembler::DefaultTmpList() {
+  return CPURegList(ip0, ip1);
+}
+
+
+CPURegList MacroAssembler::DefaultFPTmpList() {
+  return CPURegList(fp_scratch1, fp_scratch2);
+}
+
+
 void MacroAssembler::LogicalMacro(const Register& rd,
                                   const Register& rn,
                                   const Operand& operand,
                                   LogicalOp op) {
   UseScratchRegisterScope temps(this);
 
   if (operand.NeedsRelocation()) {
     Register temp = temps.AcquireX();
     LoadRelocated(temp, operand);
     Logical(rd, rn, temp, op);
@@ skipping 4648 matching lines @@
   // Abort is used in some contexts where csp is the stack pointer. In order to
   // simplify the CallRuntime code, make sure that jssp is the stack pointer.
   // There is no risk of register corruption here because Abort doesn't return.
   Register old_stack_pointer = StackPointer();
   SetStackPointer(jssp);
   Mov(jssp, old_stack_pointer);
 
   // We need some scratch registers for the MacroAssembler, so make sure we have
   // some. This is safe here because Abort never returns.
   RegList old_tmp_list = TmpList()->list();
-  TmpList()->Combine(ip0);
-  TmpList()->Combine(ip1);
+  TmpList()->Combine(MacroAssembler::DefaultTmpList());
 
   if (use_real_aborts()) {
     // Avoid infinite recursion; Push contains some assertions that use Abort.
     NoUseRealAbortsScope no_real_aborts(this);
 
     Mov(x0, Smi::FromInt(reason));
     Push(x0);
 
     if (!has_frame_) {
       // We don't actually want to generate a pile of code for this, so just
@@ skipping 486 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64