mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
// Copyright (c) 2016 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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// This file defines the language constructs for representing a SPIR-V
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// module in memory.
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#ifndef LIBSPIRV_OPT_BASIC_BLOCK_H_
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#define LIBSPIRV_OPT_BASIC_BLOCK_H_
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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 "instruction.h"
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#include "iterator.h"
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namespace spvtools {
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namespace ir {
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class Function;
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// A SPIR-V basic block.
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class BasicBlock {
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public:
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using iterator = UptrVectorIterator<Instruction>;
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using const_iterator = UptrVectorIterator<Instruction, true>;
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// Creates a basic block with the given starting |label|.
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inline explicit BasicBlock(std::unique_ptr<Instruction> label);
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// Sets the enclosing function for this basic block.
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void SetParent(Function* function) { function_ = function; }
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// Appends an instruction to this basic block.
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inline void AddInstruction(std::unique_ptr<Instruction> i);
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// Appends all of block's instructions (except label) to this block
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inline void AddInstructions(BasicBlock* bp);
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// The label starting this basic block.
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Instruction* GetLabelInst() { return label_.get(); }
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// Returns the id of the label at the top of this block
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inline uint32_t id() const { return label_->result_id(); }
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iterator begin() { return iterator(&insts_, insts_.begin()); }
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iterator end() { return iterator(&insts_, insts_.end()); }
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const_iterator cbegin() const {
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return const_iterator(&insts_, insts_.cbegin());
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}
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const_iterator cend() const {
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return const_iterator(&insts_, insts_.cend());
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}
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iterator tail() {
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assert(!insts_.empty());
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return iterator(&insts_, std::prev(insts_.end()));
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}
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// Runs the given function |f| on each instruction in this basic block, and
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// optionally on the debug line instructions that might precede them.
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inline void ForEachInst(const std::function<void(Instruction*)>& f,
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bool run_on_debug_line_insts = false);
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inline void ForEachInst(const std::function<void(const Instruction*)>& f,
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bool run_on_debug_line_insts = false) const;
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// Runs the given function |f| on each Phi instruction in this basic block,
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// and optionally on the debug line instructions that might precede them.
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inline void ForEachPhiInst(const std::function<void(Instruction*)>& f,
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bool run_on_debug_line_insts = false);
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// Runs the given function |f| on each label id of each successor block
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void ForEachSuccessorLabel(
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const std::function<void(const uint32_t)>& f);
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private:
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// The enclosing function.
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Function* function_;
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// The label starting this basic block.
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std::unique_ptr<Instruction> label_;
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// Instructions inside this basic block, but not the OpLabel.
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std::vector<std::unique_ptr<Instruction>> insts_;
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};
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inline BasicBlock::BasicBlock(std::unique_ptr<Instruction> label)
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: function_(nullptr), label_(std::move(label)) {}
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inline void BasicBlock::AddInstruction(std::unique_ptr<Instruction> i) {
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insts_.emplace_back(std::move(i));
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}
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inline void BasicBlock::AddInstructions(BasicBlock* bp) {
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auto bEnd = end();
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(void) bEnd.InsertBefore(&bp->insts_);
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}
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inline void BasicBlock::ForEachInst(const std::function<void(Instruction*)>& f,
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bool run_on_debug_line_insts) {
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if (label_) label_->ForEachInst(f, run_on_debug_line_insts);
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for (auto& inst : insts_) inst->ForEachInst(f, run_on_debug_line_insts);
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}
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inline void BasicBlock::ForEachInst(
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const std::function<void(const Instruction*)>& f,
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bool run_on_debug_line_insts) const {
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if (label_)
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static_cast<const Instruction*>(label_.get())
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->ForEachInst(f, run_on_debug_line_insts);
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for (const auto& inst : insts_)
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static_cast<const Instruction*>(inst.get())
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->ForEachInst(f, run_on_debug_line_insts);
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}
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inline void BasicBlock::ForEachPhiInst(
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const std::function<void(Instruction*)>& f, bool run_on_debug_line_insts) {
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for (auto& inst : insts_) {
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if (inst->opcode() != SpvOpPhi) break;
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inst->ForEachInst(f, run_on_debug_line_insts);
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}
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}
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} // namespace ir
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} // namespace spvtools
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#endif // LIBSPIRV_OPT_BASIC_BLOCK_H_
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