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7e8df044c6
Operand is just a tagged union of uint32_t, float and std::string. Use std::variant for this. Reduces memory size, and removes the need to always construct an empty string when the operand is float or int. Bug: tint:1383 Change-Id: I02fc10137d6fab410ea25a8d6c6e279b882b2287 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/88302 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Dan Sinclair <dsinclair@chromium.org> Commit-Queue: Ben Clayton <bclayton@google.com>
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
// Copyright 2020 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_WRITER_SPIRV_FUNCTION_H_
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#define SRC_TINT_WRITER_SPIRV_FUNCTION_H_
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#include <functional>
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#include "src/tint/writer/spirv/instruction.h"
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namespace tint::writer::spirv {
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/// A SPIR-V function
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class Function {
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public:
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/// Constructor for testing purposes
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/// This creates a bad declaration, so won't generate correct SPIR-V
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Function();
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/// Constructor
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/// @param declaration the function declaration
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/// @param label_op the operand for function's entry block label
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/// @param params the function parameters
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Function(const Instruction& declaration,
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const Operand& label_op,
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const InstructionList& params);
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/// Copy constructor
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/// @param other the function to copy
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Function(const Function& other);
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~Function();
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/// Iterates over the function call the cb on each instruction
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/// @param cb the callback to call
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void iterate(std::function<void(const Instruction&)> cb) const;
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/// @returns the declaration
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const Instruction& declaration() const { return declaration_; }
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/// @returns the label ID for the function entry block
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uint32_t label_id() const { return std::get<uint32_t>(label_op_); }
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/// Adds an instruction to the instruction list
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/// @param op the op to set
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/// @param operands the operands for the instruction
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void push_inst(spv::Op op, const OperandList& operands) {
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instructions_.push_back(Instruction{op, operands});
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}
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/// @returns the instruction list
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const InstructionList& instructions() const { return instructions_; }
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/// Adds a variable to the variable list
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/// @param operands the operands for the variable
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void push_var(const OperandList& operands) {
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vars_.push_back(Instruction{spv::Op::OpVariable, operands});
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}
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/// @returns the variable list
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const InstructionList& variables() const { return vars_; }
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/// @returns the word length of the function
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uint32_t word_length() const {
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// 1 for the Label and 1 for the FunctionEnd
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uint32_t size = 2 + declaration_.word_length();
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for (const auto& param : params_) {
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size += param.word_length();
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}
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for (const auto& var : vars_) {
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size += var.word_length();
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}
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for (const auto& inst : instructions_) {
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size += inst.word_length();
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}
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return size;
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}
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private:
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Instruction declaration_;
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Operand label_op_;
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InstructionList params_;
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InstructionList vars_;
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InstructionList instructions_;
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};
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} // namespace tint::writer::spirv
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#endif // SRC_TINT_WRITER_SPIRV_FUNCTION_H_
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