Emit source positions in deopt comments, too.

src/mips/lithium-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.7
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 842 matching lines @@
 
   if (info()->ShouldTrapOnDeopt()) {
     Label skip;
     if (condition != al) {
       __ Branch(&skip, NegateCondition(condition), src1, src2);
     }
     __ stop("trap_on_deopt");
     __ bind(&skip);
   }
 
-  Deoptimizer::Reason reason(instr->Mnemonic(), detail);
+  Deoptimizer::Reason reason(instr->hydrogen_value()->position().raw(),
+                             instr->Mnemonic(), detail);
   DCHECK(info()->IsStub() || frame_is_built_);
   // Go through jump table if we need to handle condition, build frame, or
   // restore caller doubles.
   if (condition == al && frame_is_built_ &&
       !info()->saves_caller_doubles()) {
     DeoptComment(reason);
     __ Call(entry, RelocInfo::RUNTIME_ENTRY, condition, src1, src2);
   } else {
     // We often have several deopts to the same entry, reuse the last
     // jump entry if this is the case.
@@ skipping 5041 matching lines @@
   __ li(at, scope_info);
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal