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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.
// Flags: --experimental-wasm-gc
d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");
(function I31RefBasic() {
print(arguments.callee.name);
var builder = new WasmModuleBuilder();
builder.addFunction("signed", kSig_i_i)
.addLocals(wasmRefType(kWasmI31Ref), 1)
.addBody([kExprLocalGet, 0, kGCPrefix, kExprI31New, kExprLocalTee, 1,
kGCPrefix, kExprI31GetS])
.exportFunc();
builder.addFunction("unsigned", kSig_i_i)
.addLocals(wasmRefType(kWasmI31Ref), 1)
.addBody([kExprLocalGet, 0, kGCPrefix, kExprI31New, kExprLocalTee, 1,
kGCPrefix, kExprI31GetU])
.exportFunc();
let instance = builder.instantiate();
assertEquals(123, instance.exports.signed(123));
assertEquals(123, instance.exports.unsigned(123));
// Truncation:
assertEquals(0x1234, instance.exports.signed(0x80001234));
assertEquals(0x1234, instance.exports.unsigned(0x80001234));
// Sign/zero extention:
assertEquals(-1, instance.exports.signed(0x7fffffff));
assertEquals(0x7fffffff, instance.exports.unsigned(0x7fffffff));
})();
(function I31RefNullable() {
print(arguments.callee.name);
var builder = new WasmModuleBuilder();
builder.addFunction("i31_null", kSig_i_i)
.addLocals(wasmRefNullType(kWasmI31Ref), 1)
.addBody([
kExprLocalGet, 0,
kExprIf, kWasmVoid,
kExprRefNull, kI31RefCode, kExprLocalSet, 1,
kExprElse,
...wasmI32Const(42), kGCPrefix, kExprI31New, kExprLocalSet, 1,
kExprEnd,
kExprLocalGet, 1, kGCPrefix, kExprI31GetS])
.exportFunc();
let instance = builder.instantiate();
assertEquals(42, instance.exports.i31_null(0));
assertTraps(kTrapNullDereference, () => instance.exports.i31_null(1));
})();
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