v8/test/mjsunit/asm/call-annotation.js

// Copyright 2017 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: --allow-natives-syntax --validate-asm

// This file contains test cases that are particularly interesting for a single
// pass asm.js parsing and validation implementation in regards to the return
// type annotation via the "|0" operation.

var g_was_called = 0;
function g() {
  g_was_called++;
  return "23.4";
}

(function SuccessExternCoercion() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = a + (g() | 0) | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertTrue(%IsAsmWasmCode(Module));
  assertEquals(24, m.f(1));
  assertEquals(1, g_was_called);
})();

(function FailPrecedenceLeftStronger() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = a + g() | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertFalse(%IsAsmWasmCode(Module));
  assertEquals(123, m.f(1));
  assertEquals(1, g_was_called);
})();

(function FailPrecedenceRightStronger() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = (g() | 0 + a) | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertFalse(%IsAsmWasmCode(Module));
  assertEquals(127, m.f(127));
  assertEquals(1, g_was_called);
})();

(function FailParenthesizedAnnotation() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = (g()) | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  // TODO(6127): Only properly rejected by "new" parser.
  // assertFalse(%IsAsmWasmCode(Module));
  assertEquals(23, m.f(1));
  assertEquals(1, g_was_called);
})();

(function FailNonZeroAnnotation() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = g() | 127;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertFalse(%IsAsmWasmCode(Module));
  assertEquals(127, m.f(1));
  assertEquals(1, g_was_called);
})();

(function FailNestedAnnotation1() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = g() | g() | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertFalse(%IsAsmWasmCode(Module));
  assertEquals(23, m.f(1));
  assertEquals(2, g_was_called);
})();

(function FailNestedAnnotation2() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = a | 0;
      a = g() | 0 | g() | 0;
      return a | 0;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertFalse(%IsAsmWasmCode(Module));
  assertEquals(23, m.f(1));
  assertEquals(2, g_was_called);
})();

(function SuccessMixedWithDoubleAnnotation() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    function f(a) {
      a = +a;
      a = a + +(g() | 0);
      return +a;
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertTrue(%IsAsmWasmCode(Module));
  assertEquals(23.5, m.f(0.5));
  assertEquals(1, g_was_called);
})();

(function SuccessMixedWithFloatAnnotation() {
  function Module(stdlib, imports, heap) {
    "use asm";
    var g = imports.g;
    var fround = stdlib.Math.fround;
    function f(a) {
      a = fround(a);
      a = fround(a + fround(g() | 0));
      return fround(a);
    }
    return { f:f };
  }
  g_was_called = 0;
  var m = Module(this, { g:g });
  assertTrue(%IsAsmWasmCode(Module));
  assertEquals(23.5, m.f(0.5));
  assertEquals(1, g_was_called);
})();