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Diffstat (limited to 'compiler/optimizing/constant_folding.cc')
-rw-r--r-- | compiler/optimizing/constant_folding.cc | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/compiler/optimizing/constant_folding.cc b/compiler/optimizing/constant_folding.cc deleted file mode 100644 index 0b3ad9809f..0000000000 --- a/compiler/optimizing/constant_folding.cc +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Copyright (C) 2014 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "constant_folding.h" - -namespace art { - -void HConstantFolding::Run() { - // Process basic blocks in reverse post-order in the dominator tree, - // so that an instruction turned into a constant, used as input of - // another instruction, may possibly be used to turn that second - // instruction into a constant as well. - for (HReversePostOrderIterator it(*graph_); !it.Done(); it.Advance()) { - HBasicBlock* block = it.Current(); - // Traverse this block's instructions in (forward) order and - // replace the ones that can be statically evaluated by a - // compile-time counterpart. - for (HInstructionIterator it(block->GetInstructions()); - !it.Done(); it.Advance()) { - HInstruction* inst = it.Current(); - // Constant folding: replace `c <- a op b' with a compile-time - // evaluation of `a op b' if `a' and `b' are constant. - if (inst->IsBinaryOperation()) { - HConstant* constant = - inst->AsBinaryOperation()->TryStaticEvaluation(graph_->GetArena()); - if (constant != nullptr) { - inst->GetBlock()->ReplaceAndRemoveInstructionWith(inst, constant); - } - } - } - } -} - -} // namespace art |