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// Copyright 2020 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.
#include "src/tint/lang/msl/writer/writer.h"
#include <memory>
#include <utility>
#include "src/tint/lang/msl/writer/ast_printer/ast_printer.h"
#include "src/tint/lang/msl/writer/printer/printer.h"
#include "src/tint/lang/msl/writer/raise/raise.h"
#include "src/tint/lang/wgsl/reader/program_to_ir/program_to_ir.h"
namespace tint::msl::writer {
Result<Output, std::string> Generate(const Program& program, const Options& options) {
if (!program.IsValid()) {
return std::string("input program is not valid");
}
Output output;
if (options.use_tint_ir) {
// Convert the AST program to an IR module.
auto converted = wgsl::reader::ProgramToIR(program);
if (!converted) {
return std::string("IR converter: " + converted.Failure());
}
auto ir = converted.Move();
// Raise the IR to the MSL dialect.
auto raised = raise::Raise(&ir);
if (!raised) {
return std::move(raised.Failure());
}
// Generate the MSL code.
auto impl = std::make_unique<Printer>(&ir);
auto result = impl->Generate();
if (!result) {
return result.Failure();
}
output.msl = impl->Result();
} else {
// Sanitize the program.
auto sanitized_result = Sanitize(program, options);
if (!sanitized_result.program.IsValid()) {
return sanitized_result.program.Diagnostics().str();
}
output.needs_storage_buffer_sizes = sanitized_result.needs_storage_buffer_sizes;
output.used_array_length_from_uniform_indices =
std::move(sanitized_result.used_array_length_from_uniform_indices);
// Generate the MSL code.
auto impl = std::make_unique<ASTPrinter>(sanitized_result.program);
if (!impl->Generate()) {
return impl->Diagnostics().str();
}
output.msl = impl->Result();
output.has_invariant_attribute = impl->HasInvariant();
output.workgroup_allocations = impl->DynamicWorkgroupAllocations();
}
return output;
}
} // namespace tint::msl::writer