Introduced TypeFeedbackId and BailoutId types.

src/runtime.cc

 // Copyright 2012 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 7888 matching lines @@
       function->PrintName();
       PrintF(": is code optimizable: %s, is debugger enabled: %s]\n",
           function->shared()->code()->optimizable() ? "T" : "F",
           isolate->DebuggerHasBreakPoints() ? "T" : "F");
     }
     function->ReplaceCode(function->shared()->code());
     return function->code();
   }
   function->shared()->code()->set_profiler_ticks(0);
   if (JSFunction::CompileOptimized(function,
-                                   AstNode::kNoNumber,
+                                   BailoutId::None(),
                                    CLEAR_EXCEPTION)) {
     return function->code();
   }
   if (FLAG_trace_opt) {
     PrintF("[failed to optimize ");
     function->PrintName();
     PrintF(": optimized compilation failed]\n");
   }
   function->ReplaceCode(function->shared()->code());
   return function->code();
@@ skipping 246 matching lines @@
     // deoptimized so that we are currently in an unoptimized activation.
     // Check for optimized activations of this function.
     JavaScriptFrameIterator it(isolate);
     while (succeeded && !it.done()) {
       JavaScriptFrame* frame = it.frame();
       succeeded = !frame->is_optimized() || frame->function() != *function;
       it.Advance();
     }
   }
 
-  int ast_id = AstNode::kNoNumber;
+  BailoutId ast_id = BailoutId::None();
   if (succeeded) {
     // The top JS function is this one, the PC is somewhere in the
     // unoptimized code.
     JavaScriptFrameIterator it(isolate);
     JavaScriptFrame* frame = it.frame();
     ASSERT(frame->function() == *function);
     ASSERT(frame->LookupCode() == *unoptimized);
     ASSERT(unoptimized->contains(frame->pc()));
 
     // Use linear search of the unoptimized code's stack check table to find
     // the AST id matching the PC.
     Address start = unoptimized->instruction_start();
     unsigned target_pc_offset = static_cast<unsigned>(frame->pc() - start);
     Address table_cursor = start + unoptimized->stack_check_table_offset();
     uint32_t table_length = Memory::uint32_at(table_cursor);
     table_cursor += kIntSize;
     for (unsigned i = 0; i < table_length; ++i) {
       // Table entries are (AST id, pc offset) pairs.
       uint32_t pc_offset = Memory::uint32_at(table_cursor + kIntSize);
       if (pc_offset == target_pc_offset) {
-        ast_id = static_cast<int>(Memory::uint32_at(table_cursor));
+        ast_id = BailoutId(static_cast<int>(Memory::uint32_at(table_cursor)));
         break;
       }
       table_cursor += 2 * kIntSize;
     }
-    ASSERT(ast_id != AstNode::kNoNumber);
+    ASSERT(!ast_id.IsNone());
     if (FLAG_trace_osr) {
-      PrintF("[replacing on-stack at AST id %d in ", ast_id);
+      PrintF("[replacing on-stack at AST id %d in ", ast_id.ToInt());
       function->PrintName();
       PrintF("]\n");
     }
 
     // Try to compile the optimized code.  A true return value from
     // CompileOptimized means that compilation succeeded, not necessarily
     // that optimization succeeded.
     if (JSFunction::CompileOptimized(function, ast_id, CLEAR_EXCEPTION) &&
         function->IsOptimized()) {
       DeoptimizationInputData* data = DeoptimizationInputData::cast(
           function->code()->deoptimization_data());
       if (data->OsrPcOffset()->value() >= 0) {
         if (FLAG_trace_osr) {
           PrintF("[on-stack replacement offset %d in optimized code]\n",
                data->OsrPcOffset()->value());
         }
-        ASSERT(data->OsrAstId()->value() == ast_id);
+        ASSERT(BailoutId(data->OsrAstId()->value()) == ast_id);
       } else {
         // We may never generate the desired OSR entry if we emit an
         // early deoptimize.
         succeeded = false;
       }
     } else {
       succeeded = false;
     }
   }
 
@@ skipping 18 matching lines @@
                                     *replacement_code);
 
   // Allow OSR only at nesting level zero again.
   unoptimized->set_allow_osr_at_loop_nesting_level(0);
 
   // If the optimization attempt succeeded, return the AST id tagged as a
   // smi. This tells the builtin that we need to translate the unoptimized
   // frame to an optimized one.
   if (succeeded) {
     ASSERT(function->code()->kind() == Code::OPTIMIZED_FUNCTION);
-    return Smi::FromInt(ast_id);
+    return Smi::FromInt(ast_id.ToInt());
   } else {
     if (function->IsMarkedForLazyRecompilation()) {
       function->ReplaceCode(function->shared()->code());
     }
     return Smi::FromInt(-1);
   }
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CheckIsBootstrapping) {
@@ skipping 5075 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal