Implement optimized unary ops for ia32 as well. Fix a crash in disassembler.

runtime/vm/flow_graph_compiler_ia32.h

Index: runtime/vm/flow_graph_compiler_ia32.h
===================================================================
--- runtime/vm/flow_graph_compiler_ia32.h	(revision 8181)
+++ runtime/vm/flow_graph_compiler_ia32.h	(working copy)
@@ -37,6 +37,13 @@
 
   void CompileGraph();
 
+  Label* AddDeoptStub(intptr_t deopt_id,
+                      intptr_t deopt_token_index,
+                      intptr_t try_index_,
+                      DeoptReasonId reason,
+                      Register reg1,
+                      Register reg2);
+
   // Infrastructure copied from class CodeGenerator or stubbed out.
   void FinalizePcDescriptors(const Code& code);
   void FinalizeStackmaps(const Code& code);