Add support for lazy deoptimization from deferred stack checks

src/hydrogen.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // 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 2771 matching lines @@
   AddInstruction(new(zone()) HOsrEntry(osr_entry_id));
   HContext* context = new(zone()) HContext;
   AddInstruction(context);
   environment()->BindContext(context);
   current_block()->Goto(loop_predecessor);
   loop_predecessor->SetJoinId(statement->EntryId());
   set_current_block(loop_predecessor);
 }
 
 
-void HGraphBuilder::VisitLoopBody(Statement* body,
+void HGraphBuilder::VisitLoopBody(IterationStatement* stmt,
                                   HBasicBlock* loop_entry,
                                   BreakAndContinueInfo* break_info) {
   BreakAndContinueScope push(break_info, this);
+  AddSimulate(stmt->StackCheckId());
   HValue* context = environment()->LookupContext();
   HStackCheck* stack_check =
     new(zone()) HStackCheck(context, HStackCheck::kBackwardsBranch);
   AddInstruction(stack_check);
   ASSERT(loop_entry->IsLoopHeader());
   loop_entry->loop_information()->set_stack_check(stack_check);
-  CHECK_BAILOUT(Visit(body));
+  CHECK_BAILOUT(Visit(stmt->body()));
 }
 
 
 void HGraphBuilder::VisitDoWhileStatement(DoWhileStatement* stmt) {
   ASSERT(!HasStackOverflow());
   ASSERT(current_block() != NULL);
   ASSERT(current_block()->HasPredecessor());
   ASSERT(current_block() != NULL);
   PreProcessOsrEntry(stmt);
   HBasicBlock* loop_entry = CreateLoopHeaderBlock();
   current_block()->Goto(loop_entry);
   set_current_block(loop_entry);
 
   BreakAndContinueInfo break_info(stmt);
-  CHECK_BAILOUT(VisitLoopBody(stmt->body(), loop_entry, &break_info));
+  CHECK_BAILOUT(VisitLoopBody(stmt, loop_entry, &break_info));
   HBasicBlock* body_exit =
       JoinContinue(stmt, current_block(), break_info.continue_block());
   HBasicBlock* loop_successor = NULL;
   if (body_exit != NULL && !stmt->cond()->ToBooleanIsTrue()) {
     set_current_block(body_exit);
     // The block for a true condition, the actual predecessor block of the
     // back edge.
     body_exit = graph()->CreateBasicBlock();
     loop_successor = graph()->CreateBasicBlock();
     CHECK_BAILOUT(VisitForControl(stmt->cond(), body_exit, loop_successor));
@@ skipping 40 matching lines @@
     if (loop_successor->HasPredecessor()) {
       loop_successor->SetJoinId(stmt->ExitId());
     } else {
       loop_successor = NULL;
     }
   }
 
   BreakAndContinueInfo break_info(stmt);
   if (current_block() != NULL) {
     BreakAndContinueScope push(&break_info, this);
-    CHECK_BAILOUT(VisitLoopBody(stmt->body(), loop_entry, &break_info));
+    CHECK_BAILOUT(VisitLoopBody(stmt, loop_entry, &break_info));
   }
   HBasicBlock* body_exit =
       JoinContinue(stmt, current_block(), break_info.continue_block());
   HBasicBlock* loop_exit = CreateLoop(stmt,
                                       loop_entry,
                                       body_exit,
                                       loop_successor,
                                       break_info.break_block());
   set_current_block(loop_exit);
 }
@@ skipping 24 matching lines @@
     if (loop_successor->HasPredecessor()) {
       loop_successor->SetJoinId(stmt->ExitId());
     } else {
       loop_successor = NULL;
     }
   }
 
   BreakAndContinueInfo break_info(stmt);
   if (current_block() != NULL) {
     BreakAndContinueScope push(&break_info, this);
-    CHECK_BAILOUT(VisitLoopBody(stmt->body(), loop_entry, &break_info));
+    CHECK_BAILOUT(VisitLoopBody(stmt, loop_entry, &break_info));
   }
   HBasicBlock* body_exit =
       JoinContinue(stmt, current_block(), break_info.continue_block());
 
   if (stmt->next() != NULL && body_exit != NULL) {
     set_current_block(body_exit);
     CHECK_BAILOUT(Visit(stmt->next()));
     body_exit = current_block();
   }
 
@@ skipping 3757 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal