RFC: Switch to ast ids (instead of positions) for type feedback.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index ad327c450eb81556a7ecda1c0321247012760cd7..095f04725c371b1fd2aa9703d44e15d527a7604b 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -121,10 +121,10 @@ HInstruction* HBasicBlock::GetLastInstruction() {
 }
 
 
-HSimulate* HBasicBlock::CreateSimulate(int id) {
+HSimulate* HBasicBlock::CreateSimulate(AstId id) {
   ASSERT(HasEnvironment());
   HEnvironment* environment = last_environment();
-  ASSERT(id == AstNode::kNoNumber ||
+  ASSERT(id == kNoAstId ||
          environment->closure()->shared()->VerifyBailoutId(id));
 
   int push_count = environment->push_count();
@@ -158,7 +158,7 @@ void HBasicBlock::Finish(HControlInstruction* end) {
 
 
 void HBasicBlock::Goto(HBasicBlock* block, bool include_stack_check) {
-  AddSimulate(AstNode::kNoNumber);
+  AddSimulate(kNoAstId);
   HGoto* instr = new HGoto(block);
   instr->set_include_stack_check(include_stack_check);
   Finish(instr);
@@ -434,7 +434,7 @@ void HGraph::Verify() const {
     // Check that all join blocks have predecessors that end with an
     // unconditional goto and agree on their environment node id.
     if (block->predecessors()->length() >= 2) {
-      int id = block->predecessors()->first()->last_environment()->ast_id();
+      AstId id = block->predecessors()->first()->last_environment()->ast_id();
       for (int k = 0; k < block->predecessors()->length(); k++) {
         HBasicBlock* predecessor = block->predecessors()->at(k);
         ASSERT(predecessor->end()->IsGoto());
@@ -3953,7 +3953,7 @@ bool HGraphBuilder::TryInline(Call* expr) {
   call_context_ = ast_context();
   TypeFeedbackOracle new_oracle(Handle<Code>(shared->code()));
   oracle_ = &new_oracle;
-  graph()->info()->SetOsrAstId(AstNode::kNoNumber);
+  graph()->info()->SetOsrAstId(kNoAstId);
 
   HSubgraph* body = CreateInlinedSubgraph(env, target, function);
   body->exit_block()->AddInstruction(new HEnterInlined(target, function));
@@ -4457,7 +4457,7 @@ HInstruction* HGraphBuilder::BuildIncrement(HValue* value, bool increment) {
       ? graph_->GetConstant1()
       : graph_->GetConstantMinus1();
   HInstruction* instr = new HAdd(value, delta);
-  AssumeRepresentation(instr,  Representation::Integer32());
+  AssumeRepresentation(instr, Representation::Integer32());
   return instr;
 }
 
@@ -5131,7 +5131,7 @@ HEnvironment::HEnvironment(HEnvironment* outer,
       outer_(outer),
       pop_count_(0),
       push_count_(0),
-      ast_id_(AstNode::kNoNumber) {
+      ast_id_(kNoAstId) {
   Initialize(scope->num_parameters() + 1, scope->num_stack_slots(), 0);
 }