Devirtualize AstNode and subclasses, except for visiting-related methods.

src/compiler/ast-graph-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/ast-graph-builder.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
@@ skipping 1331 matching lines @@
     compare_switch.EndCase();
   }
 
   compare_switch.EndSwitch();
 }
 
 
 void AstGraphBuilder::VisitDoWhileStatement(DoWhileStatement* stmt) {
   LoopBuilder while_loop(this);
   while_loop.BeginLoop(GetVariablesAssignedInLoop(stmt), CheckOsrEntry(stmt));
-  VisitIterationBody(stmt, &while_loop);
+  VisitIterationBody(stmt, &while_loop, stmt->StackCheckId());
   while_loop.EndBody();
   VisitForTest(stmt->cond());
   Node* condition = environment()->Pop();
   while_loop.BreakUnless(condition);
   while_loop.EndLoop();
 }
 
 
 void AstGraphBuilder::VisitWhileStatement(WhileStatement* stmt) {
   LoopBuilder while_loop(this);
   while_loop.BeginLoop(GetVariablesAssignedInLoop(stmt), CheckOsrEntry(stmt));
   VisitForTest(stmt->cond());
   Node* condition = environment()->Pop();
   while_loop.BreakUnless(condition);
-  VisitIterationBody(stmt, &while_loop);
+  VisitIterationBody(stmt, &while_loop, stmt->StackCheckId());
   while_loop.EndBody();
   while_loop.EndLoop();
 }
 
 
 void AstGraphBuilder::VisitForStatement(ForStatement* stmt) {
   LoopBuilder for_loop(this);
   VisitIfNotNull(stmt->init());
   for_loop.BeginLoop(GetVariablesAssignedInLoop(stmt), CheckOsrEntry(stmt));
   if (stmt->cond() != nullptr) {
     VisitForTest(stmt->cond());
     Node* condition = environment()->Pop();
     for_loop.BreakUnless(condition);
   } else {
     for_loop.BreakUnless(jsgraph()->TrueConstant());
   }
-  VisitIterationBody(stmt, &for_loop);
+  VisitIterationBody(stmt, &for_loop, stmt->StackCheckId());
   for_loop.EndBody();
   VisitIfNotNull(stmt->next());
   for_loop.EndLoop();
 }
 
 
 void AstGraphBuilder::VisitForInStatement(ForInStatement* stmt) {
   VisitForValue(stmt->subject());
   Node* object = environment()->Pop();
   BlockBuilder for_block(this);
@@ skipping 56 matching lines @@
       test_value.Else();
       {
         environment()->Push(value);
         PrepareEagerCheckpoint(stmt->FilterId());
         value = environment()->Pop();
         // Bind value and do loop body.
         VectorSlotPair feedback =
             CreateVectorSlotPair(stmt->EachFeedbackSlot());
         VisitForInAssignment(stmt->each(), value, feedback,
                              stmt->AssignmentId());
-        VisitIterationBody(stmt, &for_loop);
+        VisitIterationBody(stmt, &for_loop, stmt->StackCheckId());
       }
       test_value.End();
       for_loop.EndBody();
 
       // Increment counter and continue.
       index = environment()->Peek(0);
       index = NewNode(javascript()->ForInStep(), index);
       environment()->Poke(0, index);
     }
     for_loop.EndLoop();
     environment()->Drop(5);
   }
   for_block.EndBlock();
 }
 
 
 void AstGraphBuilder::VisitForOfStatement(ForOfStatement* stmt) {
   LoopBuilder for_loop(this);
   VisitForEffect(stmt->assign_iterator());
   for_loop.BeginLoop(GetVariablesAssignedInLoop(stmt), CheckOsrEntry(stmt));
   VisitForEffect(stmt->next_result());
   VisitForTest(stmt->result_done());
   Node* condition = environment()->Pop();
   for_loop.BreakWhen(condition);
   VisitForEffect(stmt->assign_each());
-  VisitIterationBody(stmt, &for_loop);
+  VisitIterationBody(stmt, &for_loop, stmt->StackCheckId());
   for_loop.EndBody();
   for_loop.EndLoop();
 }
 
 
 void AstGraphBuilder::VisitTryCatchStatement(TryCatchStatement* stmt) {
   TryCatchBuilder try_control(this);
 
   // Evaluate the try-block inside a control scope. This simulates a handler
   // that is intercepting 'throw' control commands.
@@ skipping 1478 matching lines @@
   Visit(stmt);
 }
 
 
 void AstGraphBuilder::VisitInScope(Statement* stmt, Scope* s, Node* context) {
   ContextScope scope(this, s, context);
   DCHECK(s->declarations()->is_empty());
   Visit(stmt);
 }
 
-
 void AstGraphBuilder::VisitIterationBody(IterationStatement* stmt,
-                                         LoopBuilder* loop) {
+                                         LoopBuilder* loop,
+                                         BailoutId stack_check_id) {
   ControlScopeForIteration scope(this, stmt, loop);
   if (FLAG_turbo_loop_stackcheck || !info()->shared_info()->asm_function()) {
     Node* node = NewNode(javascript()->StackCheck());
-    PrepareFrameState(node, stmt->StackCheckId());
+    PrepareFrameState(node, stack_check_id);
   }
   Visit(stmt->body());
 }
 
 
 void AstGraphBuilder::VisitDelete(UnaryOperation* expr) {
   Node* value;
   if (expr->expression()->IsVariableProxy()) {
     // Delete of an unqualified identifier is only allowed in classic mode but
     // deleting "this" is allowed in all language modes.
@@ skipping 1383 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8