src/tint/lang/wgsl/ast/transform/array_length_from_uniform_fuzz.cc

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#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/lang/core/type/pointer.h"
#include "src/tint/lang/wgsl/ast/let.h"
#include "src/tint/lang/wgsl/ast/module.h"
#include "src/tint/lang/wgsl/ast/transform/array_length_from_uniform.h"
#include "src/tint/lang/wgsl/sem/variable.h"

namespace tint::ast::transform {
namespace {

bool CanRun(const Program& program, const ArrayLengthFromUniform::Config& config) {
    // The ArrayLengthFromUniform depends on SimplifyPointers, and cannot handle pointers to arrays
    // via lets (directly or via struct pointers). Reject all shaders with pointer lets.
    for (auto* node : program.ASTNodes().Objects()) {
        if (auto* let = node->As<ast::Let>()) {
            if (auto* sem = program.Sem().Get(let)) {
                if (auto* ptr = sem->Type()->As<core::type::Pointer>()) {
                    return false;
                }
            }
        }
    }

    for (auto& global : program.AST().GlobalVariables()) {
        if (auto* sem = program.Sem().Get<sem::GlobalVariable>(global)) {
            if (sem->Attributes().binding_point == config.ubo_binding) {
                // Might cause binding point collision
                return false;
            }
        }
    }
    return true;
}

void ArrayLengthFromUniformFuzzer(const Program& program,
                                  const ArrayLengthFromUniform::Config& config) {
    if (!CanRun(program, config)) {
        return;
    }

    DataMap inputs;
    inputs.Add<ArrayLengthFromUniform::Config>(std::move(config));

    DataMap outputs;
    if (auto result = ArrayLengthFromUniform{}.Apply(program, inputs, outputs)) {
        if (!result->IsValid()) {
            TINT_ICE() << "ArrayLengthFromUniform returned invalid program:\n"
                       << result->Diagnostics();
        }
    }
}

}  // namespace
}  // namespace tint::ast::transform

TINT_WGSL_PROGRAM_FUZZER(tint::ast::transform::ArrayLengthFromUniformFuzzer);