SPIRV-Tools/source/opt/basic_block.h

97 lines
3.4 KiB
C++

// Copyright (c) 2016 Google Inc.
//
// 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.
// This file defines the language constructs for representing a SPIR-V
// module in memory.
#ifndef LIBSPIRV_OPT_BASIC_BLOCK_H_
#define LIBSPIRV_OPT_BASIC_BLOCK_H_
#include <functional>
#include <memory>
#include <utility>
#include <vector>
#include "instruction.h"
#include "iterator.h"
namespace spvtools {
namespace ir {
class Function;
// A SPIR-V basic block.
class BasicBlock {
public:
using iterator = UptrVectorIterator<Instruction>;
using const_iterator = UptrVectorIterator<Instruction, true>;
// Creates a basic block with the given starting |label|.
inline explicit BasicBlock(std::unique_ptr<Instruction> label);
// Sets the enclosing function for this basic block.
void SetParent(Function* function) { function_ = function; }
// Appends an instruction to this basic block.
inline void AddInstruction(std::unique_ptr<Instruction> i);
iterator begin() { return iterator(&insts_, insts_.begin()); }
iterator end() { return iterator(&insts_, insts_.end()); }
const_iterator cbegin() { return const_iterator(&insts_, insts_.cbegin()); }
const_iterator cend() { return const_iterator(&insts_, insts_.cend()); }
// Runs the given function |f| on each instruction in this basic block, and
// optionally on the debug line instructions that might precede them.
inline void ForEachInst(const std::function<void(Instruction*)>& f,
bool run_on_debug_line_insts = false);
inline void ForEachInst(const std::function<void(const Instruction*)>& f,
bool run_on_debug_line_insts = false) const;
private:
// The enclosing function.
Function* function_;
// The label starting this basic block.
std::unique_ptr<Instruction> label_;
// Instructions inside this basic block, but not the OpLabel.
std::vector<std::unique_ptr<Instruction>> insts_;
};
inline BasicBlock::BasicBlock(std::unique_ptr<Instruction> label)
: function_(nullptr), label_(std::move(label)) {}
inline void BasicBlock::AddInstruction(std::unique_ptr<Instruction> i) {
insts_.emplace_back(std::move(i));
}
inline void BasicBlock::ForEachInst(const std::function<void(Instruction*)>& f,
bool run_on_debug_line_insts) {
if (label_) label_->ForEachInst(f, run_on_debug_line_insts);
for (auto& inst : insts_) inst->ForEachInst(f, run_on_debug_line_insts);
}
inline void BasicBlock::ForEachInst(
const std::function<void(const Instruction*)>& f,
bool run_on_debug_line_insts) const {
if (label_)
static_cast<const Instruction*>(label_.get())
->ForEachInst(f, run_on_debug_line_insts);
for (const auto& inst : insts_)
static_cast<const Instruction*>(inst.get())
->ForEachInst(f, run_on_debug_line_insts);
}
} // namespace ir
} // namespace spvtools
#endif // LIBSPIRV_OPT_BASIC_BLOCK_H_