Version 3.20.11.1

src/hydrogen-mark-deoptimize.cc

-// Copyright 2013 the V8 project authors. All rights reserved.
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-// modification, are permitted provided that the following conditions are
-// met:
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-//       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
-//       with the distribution.
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-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
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-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "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)) {
-      for (HUseIterator it(phi->uses()); !it.Done(); it.Advance()) {
-        HValue* use_value = it.value();
-        if (!use_value->CheckFlag(HValue::kAllowUndefinedAsNaN)) {
-          ProcessPhi(phi);
-          break;
-        }
-      }
-    }
-  }
-}
-
-
-void HMarkDeoptimizeOnUndefinedPhase::ProcessPhi(HPhi* phi) {
-  ASSERT(phi->CheckFlag(HValue::kAllowUndefinedAsNaN));
-  ASSERT(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());
-      }
-    }
-  }
-}
-
-} }  // namespace v8::internal