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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_MODULE_H_
#define SRC_TINT_IR_MODULE_H_
#include <string>
#include "src/tint/ir/function.h"
#include "src/tint/ir/instruction.h"
#include "src/tint/ir/value.h"
#include "src/tint/utils/block_allocator.h"
#include "src/tint/utils/result.h"
#include "src/tint/utils/vector.h"
// Forward Declarations
namespace tint {
class Program;
} // namespace tint
namespace tint::ir {
/// Main module class for the IR.
class Module {
public:
/// The result type for the FromProgram method.
using Result = utils::Result<Module, std::string>;
/// Builds an ir::Module from the given Program
/// @param program the Program to use.
/// @returns the `utiils::Result` of generating the IR. The result will contain the `ir::Module`
/// on success, otherwise the `std::string` error.
///
/// @note this assumes the program |IsValid|, and has had const-eval done so
/// any abstract values have been calculated and converted into the relevant
/// concrete types.
static Result FromProgram(const Program* program);
/// Constructor
/// @param program the program this module was constructed from
explicit Module(const Program* program);
/// Move constructor
/// @param o the module to move from
Module(Module&& o);
/// Destructor
~Module();
/// Move assign
/// @param o the module to assign from
/// @returns a reference to this module
Module& operator=(Module&& o);
/// Converts the module back to a Program
/// @returns the resulting program, or nullptr on error
/// (Note, this will probably turn into a utils::Result, just stubbing for now)
const Program* ToProgram() const;
/// The flow node allocator
utils::BlockAllocator<FlowNode> flow_nodes;
/// The value allocator
utils::BlockAllocator<Value> values;
/// The instruction allocator
utils::BlockAllocator<Instruction> instructions;
/// List of functions in the program
utils::Vector<Function*, 8> functions;
/// List of indexes into the functions list for the entry points
utils::Vector<Function*, 8> entry_points;
/// The source ast::Program this module was constucted from
const Program* program;
};
} // namespace tint::ir
#endif // SRC_TINT_IR_MODULE_H_