From 3c04974a90b0e03f4b509010bff49f0b2a3da57f Mon Sep 17 00:00:00 2001 From: Nicolas Geoffray Date: Wed, 24 Sep 2014 18:10:46 +0100 Subject: Optimize suspend checks in optimizing compiler. - Remove the ones added during graph build (they were added for the baseline code generator). - Emit them at loop back edges after phi moves, so that the test can directly jump to the loop header. - Fix x86 and x86_64 suspend check by using cmpw instead of cmpl. Change-Id: I6fad5795a55705d86c9e1cb85bf5d63dadfafa2a --- compiler/optimizing/instruction_simplifier.h | 39 ++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 compiler/optimizing/instruction_simplifier.h (limited to 'compiler/optimizing/instruction_simplifier.h') diff --git a/compiler/optimizing/instruction_simplifier.h b/compiler/optimizing/instruction_simplifier.h new file mode 100644 index 0000000000..b2f3f521ae --- /dev/null +++ b/compiler/optimizing/instruction_simplifier.h @@ -0,0 +1,39 @@ +/* + * 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. + */ + +#ifndef ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_ +#define ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_ + +#include "nodes.h" + +namespace art { + +/** + * Implements optimizations specific to each instruction. + */ +class InstructionSimplifier : public HGraphVisitor { + public: + explicit InstructionSimplifier(HGraph* graph) : HGraphVisitor(graph) {} + + void Run(); + + private: + virtual void VisitSuspendCheck(HSuspendCheck* check) OVERRIDE; +}; + +} // namespace art + +#endif // ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_ -- cgit v1.2.3-59-g8ed1b