src/tint/lang/msl/writer/writer_fuzz.cc

// Copyright 2024 The Dawn & Tint Authors
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#include <iostream>

#include "src/tint/cmd/fuzz/ir/fuzz.h"
#include "src/tint/lang/core/ir/module.h"
#include "src/tint/lang/core/ir/var.h"
#include "src/tint/lang/core/type/pointer.h"
#include "src/tint/lang/msl/writer/helpers/generate_bindings.h"
#include "src/tint/lang/msl/writer/writer.h"

namespace tint::msl::writer {
namespace {

Result<SuccessType> IRFuzzer(core::ir::Module& module,
                             const fuzz::ir::Context& context,
                             Options options) {
    options.bindings = GenerateBindings(module);
    options.array_length_from_uniform.ubo_binding = 30;

    // Add array_length_from_uniform entries for all storage buffers with runtime sized arrays.
    std::unordered_set<tint::BindingPoint> storage_bindings;
    for (auto* inst : *module.root_block) {
        auto* var = inst->As<core::ir::Var>();
        if (!var->Result()->Type()->UnwrapPtr()->HasFixedFootprint()) {
            if (auto bp = var->BindingPoint()) {
                if (storage_bindings.insert(bp.value()).second) {
                    options.array_length_from_uniform.bindpoint_to_size_index.emplace(
                        bp.value(), static_cast<uint32_t>(storage_bindings.size() - 1));
                }
            }
        }
    }

    auto check = CanGenerate(module, options);
    if (check != Success) {
        return Failure{check.Failure().reason};
    }

    auto output = Generate(module, options);
    if (output != Success) {
        TINT_ICE() << "Generate() failed after CanGenerate() succeeded: "
                   << output.Failure().reason;
    }

    if (output == Success && context.options.dump) {
        std::cout << "Dumping generated MSL:\n" << output->msl << "\n";
    }

    return Success;
}

}  // namespace
}  // namespace tint::msl::writer

TINT_IR_MODULE_FUZZER(tint::msl::writer::IRFuzzer,
                      tint::core::ir::Capabilities{},
                      tint::core::ir::Capabilities{
                          tint::core::ir::Capability::kAllowWorkspacePointerInputToEntryPoint});