Use parallel move resolver for optimized try-catch.

runtime/vm/intermediate_language_ia32.cc

Index: runtime/vm/intermediate_language_ia32.cc
===================================================================
--- runtime/vm/intermediate_language_ia32.cc	(revision 31252)
+++ runtime/vm/intermediate_language_ia32.cc	(working copy)
@@ -1289,8 +1289,6 @@
 
   Label* fail = (deopt != NULL) ? deopt : &fail_label;
 
-  const bool ok_is_fall_through = (deopt != NULL);
-
   if (!compiler->is_optimizing() || (field_cid == kIllegalCid)) {
     if (!compiler->is_optimizing() && (field_reg == kNoRegister)) {
       // Currently we can't have different location summaries for optimized
@@ -1491,12 +1489,9 @@
       }
     }
 
-    if (!ok_is_fall_through) {
-      __ jmp(&ok);
-    }
-
     if (deopt == NULL) {
       ASSERT(!compiler->is_optimizing());
+      __ jmp(&ok);
       __ Bind(fail);
 
       __ cmpl(FieldAddress(field_reg, Field::guarded_cid_offset()),
@@ -1511,7 +1506,6 @@
   } else {
     ASSERT(compiler->is_optimizing());
     ASSERT(deopt != NULL);
-    ASSERT(ok_is_fall_through);
     // Field guard class has been initialized and is known.
     if (field_reg != kNoRegister) {
       __ LoadObject(field_reg, Field::ZoneHandle(field().raw()));