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

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
===================================================================
--- runtime/vm/flow_graph_compiler_ia32.cc	(revision 8181)
+++ runtime/vm/flow_graph_compiler_ia32.cc	(working copy)
@@ -65,7 +65,9 @@
   __ Comment("Deopt stub for id %d", deopt_id_);
   __ Bind(entry_label());
   for (intptr_t i = 0; i < registers_.length(); i++) {
-    __ pushl(registers_[i]);
+    if (registers_[i] != kNoRegister) {
+      __ pushl(registers_[i]);
+    }
   }
   __ movl(EAX, Immediate(Smi::RawValue(reason_)));
   __ call(&StubCode::DeoptimizeLabel());
@@ -139,6 +141,23 @@
                                       try_index);
 }
 
+
+Label* FlowGraphCompiler::AddDeoptStub(intptr_t deopt_id,
+                                       intptr_t deopt_token_index,
+                                       intptr_t try_index,
+                                       DeoptReasonId reason,
+                                       Register reg1,
+                                       Register reg2) {
+  DeoptimizationStub* stub =
+      new DeoptimizationStub(deopt_id, deopt_token_index, try_index, reason);
+  stub->Push(reg1);
+  stub->Push(reg2);
+  deopt_stubs_.Add(stub);
+  return stub->entry_label();
+}
+
+
+
 #define __ assembler_->
 
 void FlowGraphCompiler::IntrinsifyGetter() {