SaveCallerSaveRegsisters needs to save all caller-save registers

src/a64/code-stubs-a64.h

Index: src/a64/code-stubs-a64.h
diff --git a/src/a64/code-stubs-a64.h b/src/a64/code-stubs-a64.h
index 4094887aaf69b03f9a68b06b406fe277f6634c2f..e63451d37c7326963a4153505afc8ab5ecd7fb8c 100644
--- a/src/a64/code-stubs-a64.h
+++ b/src/a64/code-stubs-a64.h
@@ -314,13 +314,11 @@ class RecordWriteStub: public PlatformCodeStub {
       scratch1_ = Register(pool_available.PopLowestIndex());
       scratch2_ = Register(pool_available.PopLowestIndex());
 
-      // SaveCallerRegisters method needs to save caller saved register, however
-      // we dont bother saving x8, x9, ip0 and ip1 because they are used as
-      // scratch registers by the MacroAssembler.
+      // SaveCallerRegisters method needs to save caller saved register, howeve

[Rodolph Perfetta (ARM), 2014/01/28 13:24:58]

nit: however

+      // we dont bother saving ip0 and ip1 because they are used as scratch
+      // registers by the MacroAssembler.
       saved_regs_.Remove(ip0);
       saved_regs_.Remove(ip1);
-      saved_regs_.Remove(x8);
-      saved_regs_.Remove(x9);
 
       // The scratch registers will be restored by other means so we don't need
       // to save them with the other caller saved registers.