9e55d25735
It's been enabled by default since Chrome 91. Bug: v8:6020 Change-Id: Id26b7fb0b7dffe19a88a6f0071dd59203b06415a Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3957636 Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> Commit-Queue: Adam Klein <adamk@chromium.org> Cr-Commit-Position: refs/heads/main@{#83862}
46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This exercises an bug in scalar-lowering for load transforms. In
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// particular, if the index input to v128.load32_splat was a extract_lane, the
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// input wasn't correctly lowered. This caused the extract_lane node to stick
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// around until code-generator, where we hit a mismatch in the register types.
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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(function() {
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const builder = new WasmModuleBuilder();
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builder.addMemory(1, 1);
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builder.addFunction(undefined, kSig_i_ii)
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.addBodyWithEnd([
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kExprI32Const, 0,
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kExprLocalGet, 0,
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kExprI32StoreMem, 0, 0,
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kExprI32Const, 4,
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kExprLocalGet, 0,
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kExprI32StoreMem, 0, 0,
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kExprI32Const, 8,
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kExprLocalGet, 0,
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kExprI32StoreMem, 0, 0,
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kExprI32Const, 12,
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kExprLocalGet, 0,
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kExprI32StoreMem, 0, 0,
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// Memory now looks like (in bytes):
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// [4, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0]
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kExprI32Const, 0,
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kSimdPrefix, kExprS128LoadMem, 0, 0,
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kSimdPrefix, kExprI32x4ExtractLane, 0,
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// load 32-bit from byte 4, then splat to all lanes.
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kSimdPrefix, kExprS128Load32Splat, 0, 0,
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kSimdPrefix, kExprI32x4ExtractLane, 3,
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kExprEnd,
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])
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.exportAs('main');
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const instance = builder.instantiate();
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assertEquals(4, instance.exports.main(4));
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})();
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