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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif // !V8_ENABLE_WEBASSEMBLY
#ifndef V8_COMPILER_WASM_COMPILER_DEFINITIONS_H_
#define V8_COMPILER_WASM_COMPILER_DEFINITIONS_H_
#include <cstdint>
#include <ostream>
#include "src/base/functional.h"
#include "src/wasm/value-type.h"
namespace v8 {
namespace internal {
namespace compiler {
// If {to} is nullable, it means that null passes the check.
// {from} may change in compiler optimization passes as the object's type gets
// narrowed.
// TODO(12166): Add modules if we have cross-module inlining.
struct WasmTypeCheckConfig {
wasm::ValueType from;
const wasm::ValueType to;
};
V8_INLINE std::ostream& operator<<(std::ostream& os,
WasmTypeCheckConfig const& p) {
return os << p.from.name() << " -> " << p.to.name();
}
V8_INLINE size_t hash_value(WasmTypeCheckConfig const& p) {
return base::hash_combine(p.from.raw_bit_field(), p.to.raw_bit_field());
}
V8_INLINE bool operator==(const WasmTypeCheckConfig& p1,
const WasmTypeCheckConfig& p2) {
return p1.from == p2.from && p1.to == p2.to;
}
static constexpr int kCharWidthBailoutSentinel = 3;
enum NullCheckStrategy { kExplicitNullChecks, kTrapHandler };
// Static knowledge about whether a wasm-gc operation, such as struct.get, needs
// a null check.
enum CheckForNull { kWithoutNullCheck, kWithNullCheck };
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_WASM_COMPILER_DEFINITIONS_H_
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