regress-1161654.js

// Copyright 2021 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: --wasm-staging

// This is a fuzzer-generated test case that exposed a bug in Liftoff that only
// affects ARM, where the fp register aliasing is different from other archs.
// We were inncorrectly clearing the the high fp register in a LiftoffRegList
// indicating registers to load, hitting a DCHECK.
d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');

const builder = new WasmModuleBuilder();
builder.addMemory(19, 32, false);
builder.addGlobal(kWasmI32, 0);
builder.addType(makeSig([], []));
builder.addType(makeSig([kWasmI64, kWasmS128, kWasmF32], [kWasmI32]));
// Generate function 1 (out of 5).
builder.addFunction(undefined, 0 /* sig */)
  .addBodyWithEnd([
// signature: v_v
// body:
kExprI32Const, 0x05,  // i32.const
kExprReturn,  // return
kExprUnreachable,  // unreachable
kExprEnd,  // end @5
]);
// Generate function 4 (out of 5).
builder.addFunction(undefined, 1 /* sig */)
  .addBodyWithEnd([
// signature: i_lsf
// body:
kExprLocalGet, 0x01,  // local.get
kExprLocalGet, 0x01,  // local.get
kExprGlobalGet, 0x00,  // global.get
kExprDrop,  // drop
kExprLoop, kWasmVoid,  // loop @8
  kExprLoop, 0x00,  // loop @10
    kExprI32Const, 0x01,  // i32.const
    kExprMemoryGrow, 0x00,  // memory.grow
    kExprI64LoadMem8U, 0x00, 0x70,  // i64.load8_u
    kExprLoop, 0x00,  // loop @19
      kExprCallFunction, 0x00,  // call function #0: v_v
      kExprEnd,  // end @23
    kExprI64Const, 0xf1, 0x24,  // i64.const
    kExprGlobalGet, 0x00,  // global.get
    kExprDrop,  // drop
    kExprBr, 0x00,  // br depth=0
    kExprEnd,  // end @32
  kExprEnd,  // end @33
kExprI32Const, 0x5b,  // i32.const
kExprReturn,  // return
kExprEnd,  // end @37
]);
// Instantiation is enough to cause a crash.
const instance = builder.instantiate();