Index: src/hydrogen-dehoist.cc |
diff --git a/src/hydrogen-dehoist.cc b/src/hydrogen-dehoist.cc |
deleted file mode 100644 |
index e521c25cdae47b0e3a9251e56e65fd99e016bd62..0000000000000000000000000000000000000000 |
--- a/src/hydrogen-dehoist.cc |
+++ /dev/null |
@@ -1,71 +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/hydrogen-dehoist.h" |
-#include "src/base/safe_math.h" |
- |
-namespace v8 { |
-namespace internal { |
- |
-static void DehoistArrayIndex(ArrayInstructionInterface* array_operation) { |
- HValue* index = array_operation->GetKey()->ActualValue(); |
- if (!index->representation().IsSmiOrInteger32()) return; |
- if (!index->IsAdd() && !index->IsSub()) return; |
- |
- HConstant* constant; |
- HValue* subexpression; |
- HBinaryOperation* binary_operation = HBinaryOperation::cast(index); |
- if (binary_operation->left()->IsConstant() && index->IsAdd()) { |
- subexpression = binary_operation->right(); |
- constant = HConstant::cast(binary_operation->left()); |
- } else if (binary_operation->right()->IsConstant()) { |
- subexpression = binary_operation->left(); |
- constant = HConstant::cast(binary_operation->right()); |
- } else { |
- return; |
- } |
- |
- if (!constant->HasInteger32Value()) return; |
- v8::base::internal::CheckedNumeric<int32_t> checked_value = |
- constant->Integer32Value(); |
- int32_t sign = binary_operation->IsSub() ? -1 : 1; |
- checked_value = checked_value * sign; |
- |
- // Multiply value by elements size, bailing out on overflow. |
- int32_t elements_kind_size = |
- 1 << ElementsKindToShiftSize(array_operation->elements_kind()); |
- checked_value = checked_value * elements_kind_size; |
- if (!checked_value.IsValid()) return; |
- int32_t value = checked_value.ValueOrDie(); |
- if (value < 0) return; |
- |
- // Ensure that the array operation can add value to existing base offset |
- // without overflowing. |
- if (!array_operation->TryIncreaseBaseOffset(value)) return; |
- |
- array_operation->SetKey(subexpression); |
- if (binary_operation->HasNoUses()) { |
- binary_operation->DeleteAndReplaceWith(NULL); |
- } |
- |
- array_operation->SetDehoisted(true); |
-} |
- |
- |
-void HDehoistIndexComputationsPhase::Run() { |
- const ZoneList<HBasicBlock*>* blocks(graph()->blocks()); |
- for (int i = 0; i < blocks->length(); ++i) { |
- for (HInstructionIterator it(blocks->at(i)); !it.Done(); it.Advance()) { |
- HInstruction* instr = it.Current(); |
- if (instr->IsLoadKeyed()) { |
- DehoistArrayIndex(HLoadKeyed::cast(instr)); |
- } else if (instr->IsStoreKeyed()) { |
- DehoistArrayIndex(HStoreKeyed::cast(instr)); |
- } |
- } |
- } |
-} |
- |
-} // namespace internal |
-} // namespace v8 |