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

// Copyright 2023 The Dawn & Tint Authors
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#include "src/tint/lang/spirv/writer/writer.h"

#include "src/tint/cmd/fuzz/ir/fuzz.h"
#include "src/tint/lang/core/ir/disassembler.h"
#include "src/tint/lang/core/ir/var.h"
#include "src/tint/lang/core/type/pointer.h"
#include "src/tint/lang/spirv/validate/validate.h"
#include "src/tint/lang/spirv/writer/helpers/generate_bindings.h"

namespace tint::spirv::writer {
namespace {

bool CanRun(const core::ir::Module& module, const Options& options) {
    // If a remapped entry point name is provided, it must not be empty.
    if (options.remapped_entry_point_name && options.remapped_entry_point_name->empty()) {
        return false;
    }

    // Check for unsupported module-scope variable address spaces and types.
    for (auto* inst : *module.root_block) {
        auto* var = inst->As<core::ir::Var>();
        auto* ptr = var->Result(0)->Type()->As<core::type::Pointer>();
        if (ptr->AddressSpace() == core::AddressSpace::kPixelLocal) {
            return false;
        }
    }
    return true;
}

Result<SuccessType> IRFuzzer(core::ir::Module& module, const fuzz::ir::Context&, Options options) {
    if (!CanRun(module, options)) {
        return Failure{"Cannot run module"};
    }

    options.bindings = GenerateBindings(module);
    auto output = Generate(module, options);
    if (output != Success) {
        return output.Failure();
    }

    auto& spirv = output->spirv;
    if (auto res = validate::Validate(Slice(spirv.data(), spirv.size()), SPV_ENV_VULKAN_1_1);
        res != Success) {
        TINT_ICE() << "output of SPIR-V writer failed to validate with SPIR-V Tools\n"
                   << res.Failure() << "\n\n"
                   << "IR:\n"
                   << core::ir::Disassembler(module).Plain();
    }

    return Success;
}

}  // namespace
}  // namespace tint::spirv::writer

TINT_IR_MODULE_FUZZER(tint::spirv::writer::IRFuzzer, tint::core::ir::Capabilities{});