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https://gitee.com/openharmony/arkcompiler_runtime_core
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c658ccf319
Issue: https://gitee.com/openharmony/arkcompiler_runtime_core/issues/I5G96F Test: Test262 suit, ark unittest, rk3568 XTS, ark previewer demo Signed-off-by: huangyu <huangyu76@huawei.com> Change-Id: I3f63d129a07deaa27a390f556dcaa5651c098185
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
/**
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* Copyright (c) 2021-2022 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "common.h"
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#include "compiler/optimizer/ir/basicblock.h"
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#include "compiler/optimizer/ir/graph.h"
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namespace panda::bytecodeopt {
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uint8_t AccReadIndex(const compiler::Inst *inst)
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{
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// For calls we cannot tell static index for acc position, thus
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// ensure that we don't invoke this for calls
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ASSERT(!inst->IsCall());
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switch (inst->GetOpcode()) {
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case compiler::Opcode::LoadArray:
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case compiler::Opcode::StoreObject:
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case compiler::Opcode::StoreStatic:
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case compiler::Opcode::NewArray:
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return 1U;
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case compiler::Opcode::StoreArray:
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return 2U;
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default: {
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if (inst->IsIntrinsic() && inst->IsAccRead()) {
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ASSERT(inst->GetBasicBlock()->GetGraph()->IsDynamicMethod());
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ASSERT(inst->GetInputsCount() >= 2U);
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return inst->GetInputsCount() - 2U;
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}
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return 0;
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}
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}
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}
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// This method is used by bytecode optimizer's codegen.
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bool CanConvertToIncI(const compiler::BinaryImmOperation *binop)
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{
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ASSERT(binop->GetBasicBlock()->GetGraph()->IsRegAllocApplied());
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ASSERT(binop->GetOpcode() == compiler::Opcode::AddI || binop->GetOpcode() == compiler::Opcode::SubI);
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// IncI works on the same register.
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if (binop->GetSrcReg(0) != binop->GetDstReg()) {
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return false;
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}
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// IncI cannot write accumulator.
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if (binop->GetSrcReg(0) == compiler::ACC_REG_ID) {
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return false;
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}
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// IncI users cannot read from accumulator.
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// While Addi/SubI stores the output in accumulator, IncI works directly on registers.
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for (const auto &user : binop->GetUsers()) {
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const auto *uinst = user.GetInst();
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if (uinst->IsCall()) {
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continue;
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}
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const uint8_t index = AccReadIndex(uinst);
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if (uinst->GetInput(index).GetInst() == binop && uinst->GetSrcReg(index) == compiler::ACC_REG_ID) {
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return false;
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}
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}
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constexpr uint64_t bitmask = 0xffffffff;
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// Define min and max values of i4 type.
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constexpr int32_t min = -8;
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constexpr int32_t max = 7;
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int32_t imm = binop->GetImm() & bitmask;
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// Note: subi 3 is the same as inci v2, -3.
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if (binop->GetOpcode() == compiler::Opcode::SubI) {
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imm = -imm;
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}
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// IncI works only with 4 bits immediates.
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return imm >= min && imm <= max;
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}
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} // namespace panda::bytecodeopt
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