141 lines
4.8 KiB
C++
141 lines
4.8 KiB
C++
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// Copyright (c) 2017 Google Inc.
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//
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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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#ifndef SOURCE_OPT_INSTRUCTION_LIST_H_
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#define SOURCE_OPT_INSTRUCTION_LIST_H_
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#include <cassert>
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#include <functional>
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#include <memory>
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#include <utility>
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#include <vector>
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#include "source/latest_version_spirv_header.h"
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#include "source/operand.h"
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#include "source/opt/instruction.h"
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#include "source/util/ilist.h"
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#include "spirv-tools/libspirv.h"
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namespace spvtools {
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namespace opt {
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// This class is intended to be the container for Instructions. This container
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// owns the instructions that are in it. When removing an Instruction from the
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// list, the caller is assuming responsibility for deleting the storage.
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//
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// TODO: Because there are a number of other data structures that will want
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// pointers to instruction, ownership should probably be moved to the module.
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// Because of that I have not made the ownership passing in this class fully
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// explicit. For example, RemoveFromList takes ownership from the list, but
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// does not return an std::unique_ptr to signal that. When we fully decide on
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// ownership, this will have to be fixed up one way or the other.
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class InstructionList : public utils::IntrusiveList<Instruction> {
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public:
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InstructionList() = default;
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InstructionList(InstructionList&& that)
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: utils::IntrusiveList<Instruction>(std::move(that)) {}
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InstructionList& operator=(InstructionList&& that) {
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auto p = static_cast<utils::IntrusiveList<Instruction>*>(this);
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*p = std::move(that);
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return *this;
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}
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// Destroy this list and any instructions in the list.
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inline virtual ~InstructionList();
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class iterator : public utils::IntrusiveList<Instruction>::iterator {
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public:
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iterator(const utils::IntrusiveList<Instruction>::iterator& i)
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: utils::IntrusiveList<Instruction>::iterator(i) {}
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iterator(Instruction* i) : utils::IntrusiveList<Instruction>::iterator(i) {}
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iterator& operator++() {
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utils::IntrusiveList<Instruction>::iterator::operator++();
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return *this;
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}
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iterator& operator--() {
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utils::IntrusiveList<Instruction>::iterator::operator--();
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return *this;
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}
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// DEPRECATED: Please use MoveBefore with an InstructionList instead.
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//
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// Moves the nodes in |list| to the list that |this| points to. The
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// positions of the nodes will be immediately before the element pointed to
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// by the iterator. The return value will be an iterator pointing to the
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// first of the newly inserted elements. Ownership of the elements in
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// |list| is now passed on to |*this|.
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iterator InsertBefore(std::vector<std::unique_ptr<Instruction>>&& list);
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// The node |i| will be inserted immediately before |this|. The return value
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// will be an iterator pointing to the newly inserted node. The owner of
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// |*i| becomes |*this|
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iterator InsertBefore(std::unique_ptr<Instruction>&& i);
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// Removes the node from the list, and deletes the storage. Returns a valid
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// iterator to the next node.
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iterator Erase() {
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iterator_template next_node = *this;
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++next_node;
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node_->RemoveFromList();
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delete node_;
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return next_node;
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}
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};
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iterator begin() { return utils::IntrusiveList<Instruction>::begin(); }
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iterator end() { return utils::IntrusiveList<Instruction>::end(); }
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const_iterator begin() const {
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return utils::IntrusiveList<Instruction>::begin();
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}
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const_iterator end() const {
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return utils::IntrusiveList<Instruction>::end();
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}
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void push_back(std::unique_ptr<Instruction>&& inst) {
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utils::IntrusiveList<Instruction>::push_back(inst.release());
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}
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// Same as in the base class, except it will delete the data as well.
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inline void clear();
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// Runs the given function |f| on the instructions in the list and optionally
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// on the preceding debug line instructions.
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inline void ForEachInst(const std::function<void(Instruction*)>& f,
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bool run_on_debug_line_insts) {
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auto next = begin();
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for (auto i = next; i != end(); i = next) {
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++next;
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i->ForEachInst(f, run_on_debug_line_insts);
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}
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}
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};
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InstructionList::~InstructionList() { clear(); }
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void InstructionList::clear() {
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while (!empty()) {
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Instruction* inst = &front();
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inst->RemoveFromList();
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delete inst;
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}
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}
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_INSTRUCTION_LIST_H_
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