1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef BERBERIS_HEAVY_OPTIMIZER_RISCV64_HEAVY_OPTIMIZE_REGION_H_ 18 #define BERBERIS_HEAVY_OPTIMIZER_RISCV64_HEAVY_OPTIMIZE_REGION_H_ 19 20 #include <cstdint> 21 #include <tuple> 22 23 #include "berberis/assembler/machine_code.h" 24 #include "berberis/guest_state/guest_addr.h" 25 26 namespace berberis { 27 28 struct HeavyOptimizeParams { 29 // Generally we don't expect too long regions, since we break at unconditional branches, including 30 // function calls and returns. But some applications end up having more than 1000 insns in region 31 // (b/197703128), which results in huge memory consumption by translator's data structures 32 // (specifically by LivenessAnalyzer). Regions longer than 200 are quite rare and there is a lot 33 // of room for optimzations within this range. Thus this limitation has very little to no impact 34 // on the generated code quality. 35 size_t max_number_of_instructions = 200; 36 }; 37 38 std::tuple<GuestAddr, bool, size_t> HeavyOptimizeRegion( 39 GuestAddr pc, 40 MachineCode* machine_code, 41 const HeavyOptimizeParams& params = HeavyOptimizeParams()); 42 43 } // namespace berberis 44 45 #endif /* BERBERIS_HEAVY_OPTIMIZER_RISCV64_HEAVY_OPTIMIZE_REGION_H_ */ 46