Fix code gen bug on arm and mips; SeqStringSetChar overwrites a register; Add better default PrintD…

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index de3254a2721cfc12c599f6a83639fed48928d2bf..2a5433f627c360a4ac1d6dd14493bad3acf6ed76 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5448,6 +5448,7 @@ void HGraph::MarkLive(HValue *ref, HValue* instr,
     if (FLAG_trace_dead_code_elimination) {
       HeapStringAllocator allocator;
       StringStream stream(&allocator);
+      ALLOW_HANDLE_DEREF(isolate(), "debug mode printing");

[Jakob Kummerow, 2013/05/16 13:18:57]

I don't see any handle being dereferenced?

[titzer, 2013/05/16 14:28:44]

Yeah, it can happen if you try to print an instruction which is a HConstant of a
map.

       if (ref != NULL) {
         ref->PrintTo(&stream);
       } else {