- Allow the use of branch delay slots.

runtime/vm/assembler.h

Index: runtime/vm/assembler.h
===================================================================
--- runtime/vm/assembler.h	(revision 19556)
+++ runtime/vm/assembler.h	(working copy)
@@ -90,6 +90,11 @@
     *reinterpret_cast<T*>(contents_ + position) = value;
   }
 
+  template<typename T> void Backup() {

[Ivan Posva, 2013/03/07 16:57:41]

If you have a better suggestions for this name, such as UnEmit, I would like to
hear about them.

[zra, 2013/03/07 17:11:34]

Remit?

+    ASSERT(Size() >= static_cast<intptr_t>(sizeof(T)));
+    cursor_ -= sizeof(T);
+  }
+
   const ZoneGrowableArray<int>& pointer_offsets() const {
 #if defined(DEBUG)
     ASSERT(fixups_processed_);