47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
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/* This file is part of the dynarmic project.
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* Copyright (c) 2020 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include <vector>
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#include "common/iterator_util.h"
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#include "frontend/ir/basic_block.h"
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#include "frontend/ir/opcodes.h"
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#include "ir_opt/passes.h"
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namespace Dynarmic::Optimization {
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void IdentityRemovalPass(IR::Block& block) {
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std::vector<IR::Inst*> to_invalidate;
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auto iter = block.begin();
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while (iter != block.end()) {
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IR::Inst& inst = *iter;
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const size_t num_args = inst.NumArgs();
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for (size_t i = 0; i < num_args; i++) {
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while (true) {
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IR::Value arg = inst.GetArg(i);
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if (!arg.IsIdentity())
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break;
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inst.SetArg(i, arg.GetInst()->GetArg(0));
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}
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}
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if (inst.GetOpcode() == IR::Opcode::Identity) {
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iter = block.Instructions().erase(inst);
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to_invalidate.push_back(&inst);
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} else {
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++iter;
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}
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}
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for (IR::Inst* inst : to_invalidate) {
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inst->Invalidate();
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}
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}
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} // namespace Dynarmic
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