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afd7f2aa21
This CL updates ir:Value to track the instructions which use a given value. The instructions add their usage upon construction. This necessitates making the values non-const in a lot of places as they get changed by the instruction. The `result` value is moved up to the base instruction class as it should exist in all instructions. Bug: tint:1718 Change-Id: Id7ab6e43d48caea502756d274dd6be2e1e4240f1 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/116141 Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
// Copyright 2022 The Tint Authors.
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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 SRC_TINT_IR_INSTRUCTION_H_
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#define SRC_TINT_IR_INSTRUCTION_H_
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#include <ostream>
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#include "src/tint/castable.h"
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#include "src/tint/ir/value.h"
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#include "src/tint/symbol_table.h"
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namespace tint::ir {
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/// An instruction in the IR.
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class Instruction : public Castable<Instruction> {
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public:
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Instruction(const Instruction& instr) = delete;
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Instruction(Instruction&& instr) = delete;
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/// Destructor
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~Instruction() override;
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Instruction& operator=(const Instruction& instr) = delete;
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Instruction& operator=(Instruction&& instr) = delete;
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/// @returns the result value for the instruction
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Value* Result() const { return result_; }
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/// Write the instruction to the given stream
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/// @param out the stream to write to
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/// @param st the symbol table
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/// @returns the stream
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virtual std::ostream& ToString(std::ostream& out, const SymbolTable& st) const = 0;
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protected:
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/// Constructor
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/// @param result the result value
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explicit Instruction(Value* result);
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private:
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Value* result_ = nullptr;
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};
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} // namespace tint::ir
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#endif // SRC_TINT_IR_INSTRUCTION_H_
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