src/tint/fuzzers/shuffle_transform.cc

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#include "src/tint/fuzzers/shuffle_transform.h"

#include <random>
#include <utility>

#include "src/tint/lang/wgsl/program/clone_context.h"
#include "src/tint/lang/wgsl/program/program_builder.h"
#include "src/tint/lang/wgsl/resolver/resolve.h"

namespace tint::fuzzers {

ShuffleTransform::ShuffleTransform(size_t seed) : seed_(seed) {}

ast::transform::Transform::ApplyResult ShuffleTransform::Apply(const Program& src,
                                                               const ast::transform::DataMap&,
                                                               ast::transform::DataMap&) const {
    ProgramBuilder b;
    program::CloneContext ctx{&b, &src, /* auto_clone_symbols */ true};

    auto decls = src.AST().GlobalDeclarations();
    auto rng = std::mt19937_64{seed_};
    std::shuffle(std::begin(decls), std::end(decls), rng);
    for (auto* decl : decls) {
        b.AST().AddGlobalDeclaration(ctx.Clone(decl));
    }

    ctx.Clone();
    return resolver::Resolve(b);
}

}  // namespace tint::fuzzers