[crankshaft] Refactor kAllowUndefinedAsNaN to kTruncatingToNumber.

src/crankshaft/hydrogen-mark-deoptimize.cc

Index: src/crankshaft/hydrogen-mark-deoptimize.cc
diff --git a/src/crankshaft/hydrogen-mark-deoptimize.cc b/src/crankshaft/hydrogen-mark-deoptimize.cc
deleted file mode 100644
index a706d913232716f9db693b53a6fe35f2ab358dcc..0000000000000000000000000000000000000000
--- a/src/crankshaft/hydrogen-mark-deoptimize.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright 2013 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/crankshaft/hydrogen-mark-deoptimize.h"
-
-namespace v8 {
-namespace internal {
-
-void HMarkDeoptimizeOnUndefinedPhase::Run() {
-  const ZoneList<HPhi*>* phi_list = graph()->phi_list();
-  for (int i = 0; i < phi_list->length(); i++) {
-    HPhi* phi = phi_list->at(i);
-    if (phi->CheckFlag(HValue::kAllowUndefinedAsNaN) &&
-        !phi->CheckUsesForFlag(HValue::kAllowUndefinedAsNaN)) {
-      ProcessPhi(phi);
-    }
-  }
-}
-
-
-void HMarkDeoptimizeOnUndefinedPhase::ProcessPhi(HPhi* phi) {
-  DCHECK(phi->CheckFlag(HValue::kAllowUndefinedAsNaN));
-  DCHECK(worklist_.is_empty());
-
-  // Push the phi onto the worklist
-  phi->ClearFlag(HValue::kAllowUndefinedAsNaN);
-  worklist_.Add(phi, zone());
-
-  // Process all phis that can reach this phi
-  while (!worklist_.is_empty()) {
-    phi = worklist_.RemoveLast();
-    for (int i = phi->OperandCount() - 1; i >= 0; --i) {
-      HValue* input = phi->OperandAt(i);
-      if (input->IsPhi() && input->CheckFlag(HValue::kAllowUndefinedAsNaN)) {
-        input->ClearFlag(HValue::kAllowUndefinedAsNaN);
-        worklist_.Add(HPhi::cast(input), zone());
-      }
-    }
-  }
-}
-
-
-void HComputeChangeUndefinedToNaN::Run() {
-  const ZoneList<HBasicBlock*>* blocks(graph()->blocks());
-  for (int i = 0; i < blocks->length(); ++i) {
-    const HBasicBlock* block(blocks->at(i));
-    for (HInstruction* current = block->first(); current != NULL; ) {
-      HInstruction* next = current->next();
-      if (current->IsChange()) {
-        if (HChange::cast(current)->can_convert_undefined_to_nan()) {
-          current->SetFlag(HValue::kAllowUndefinedAsNaN);
-        }
-      }
-      current = next;
-    }
-  }
-}
-
-
-}  // namespace internal
-}  // namespace v8