- Allow the use of branch delay slots.

runtime/vm/assembler.h

Index: runtime/vm/assembler.h
===================================================================
--- runtime/vm/assembler.h	(revision 19668)
+++ runtime/vm/assembler.h	(working copy)
@@ -80,6 +80,11 @@
     cursor_ += sizeof(T);
   }
 
+  template<typename T> void Remit() {
+    ASSERT(Size() >= static_cast<intptr_t>(sizeof(T)));
+    cursor_ -= sizeof(T);
+  }
+
   template<typename T> T Load(int position) {
     ASSERT(position >= 0 && position <= (Size() - static_cast<int>(sizeof(T))));
     return *reinterpret_cast<T*>(contents_ + position);