Enable background compilation of regexp methods. Regexp functions may use indirect goto instruction…

runtime/vm/intermediate_language_ia32.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 6543 matching lines @@
 
   return summary;
 }
 
 
 void IndirectGotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register target_reg = locs()->temp_slot(0)->reg();
 
   // Load code object from frame.
   __ movl(target_reg, Address(EBP, kPcMarkerSlotFromFp * kWordSize));
-  // Load instructions entry point.
-  __ movl(target_reg, FieldAddress(target_reg, Code::entry_point_offset()));
+  // Load instructions object (active_instructions and Code::entry_point() may
+  // not point to this instruction object any more; see Code::DisableDartCode).
+  __ movl(target_reg,
+      FieldAddress(target_reg, Code::saved_instructions_offset()));
+  __ addl(target_reg, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
 
   // Add the offset.
   Register offset_reg = locs()->in(0).reg();
   if (offset()->definition()->representation() == kTagged) {
     __ SmiUntag(offset_reg);
   }
   __ addl(target_reg, offset_reg);
 
   // Jump to the absolute address.
   __ jmp(target_reg);
@@ skipping 270 matching lines @@
   __ Drop(1);
   __ popl(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32