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// Copyright 2022 The Tint Authors.
//
// 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.
#ifndef SRC_TINT_IR_DISASSEMBLER_H_
#define SRC_TINT_IR_DISASSEMBLER_H_
#include <string>
#include <unordered_map>
#include <unordered_set>
#include "src/tint/ir/flow_node.h"
#include "src/tint/ir/module.h"
#include "src/tint/utils/string_stream.h"
namespace tint::ir {
/// Helper class to disassemble the IR
class Disassembler {
public:
/// Constructor
/// @param mod the module
explicit Disassembler(const Module& mod);
~Disassembler();
/// Returns the module as a string
/// @returns the string representation of the module
std::string Disassemble();
/// Writes the block instructions to the stream
/// @param b the block containing the instructions
void EmitBlockInstructions(const Block* b);
/// @returns the string representation
std::string AsString() const { return out_.str(); }
private:
utils::StringStream& Indent();
void Walk(const FlowNode* node);
size_t GetIdForNode(const FlowNode* node);
const Module& mod_;
utils::StringStream out_;
std::unordered_set<const FlowNode*> visited_;
std::unordered_set<const FlowNode*> stop_nodes_;
std::unordered_map<const FlowNode*, size_t> flow_node_to_id_;
size_t next_node_id_ = 0;
uint32_t indent_size_ = 0;
};
} // namespace tint::ir
#endif // SRC_TINT_IR_DISASSEMBLER_H_