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// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/lang/wgsl/ast/transform/offset_first_index.h"
namespace tint::ast::transform {
namespace {
bool CanRun(const Program& program, const OffsetFirstIndex::Config& config) {
if ((config.first_instance_offset.value_or(0) & 3) != 0 ||
(config.first_vertex_offset.value_or(0) & 3) != 0) {
return false; // Misaligned
}
if (config.first_instance_offset.has_value() &&
config.first_instance_offset == config.first_vertex_offset) {
return false; // Offset collision
}
return true;
}
void OffsetFirstIndexFuzzer(const Program& program, const OffsetFirstIndex::Config& config) {
if (!CanRun(program, config)) {
return;
}
DataMap inputs;
inputs.Add<OffsetFirstIndex::Config>(std::move(config));
DataMap outputs;
if (auto result = OffsetFirstIndex{}.Apply(program, inputs, outputs)) {
if (!result->IsValid()) {
TINT_ICE() << "OffsetFirstIndex returned invalid program:\n"
<< Program::printer(*result) << "\n"
<< result->Diagnostics();
}
}
}
} // namespace
} // namespace tint::ast::transform
TINT_WGSL_PROGRAM_FUZZER(tint::ast::transform::OffsetFirstIndexFuzzer);