diff options
Diffstat (limited to 'compiler/optimizing/instruction_simplifier.cc')
-rw-r--r-- | compiler/optimizing/instruction_simplifier.cc | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/compiler/optimizing/instruction_simplifier.cc b/compiler/optimizing/instruction_simplifier.cc new file mode 100644 index 0000000000..a0de73da32 --- /dev/null +++ b/compiler/optimizing/instruction_simplifier.cc @@ -0,0 +1,41 @@ +/* + * 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 "instruction_simplifier.h" + +namespace art { + +void InstructionSimplifier::Run() { + VisitInsertionOrder(); +} + +void InstructionSimplifier::VisitSuspendCheck(HSuspendCheck* check) { + HBasicBlock* block = check->GetBlock(); + // Currently always keep the suspend check at entry. + if (block->IsEntryBlock()) return; + + // Currently always keep suspend checks at loop entry. + if (block->IsLoopHeader() && block->GetFirstInstruction() == check) { + DCHECK(block->GetLoopInformation()->GetSuspendCheck() == check); + return; + } + + // Remove the suspend check that was added at build time for the baseline + // compiler. + block->RemoveInstruction(check); +} + +} // namespace art |