Comment #1 on issue 3839 by [email protected]: Use signaling NaN as
hole_nan for FixedDoubleArrays
https://code.google.com/p/v8/issues/detail?id=3839
The NeedsCanonicalization predicate is still wrong, the following test
fails with Crankshaft:
var ab = new ArrayBuffer(8);
var i_view = new Int32Array(ab);
i_view[0] = 0xFFF7FFFF;
i_view[1] = 0xFFF7FFFF;
var f_view = new Float64Array(ab);
var fixed_double_elements = new Float64Array(1);
fixed_double_elements[0] = f_view[0];
function A(src) { this.x = src[0]; }
new A(fixed_double_elements);
new A(fixed_double_elements);
%OptimizeFunctionOnNextCall(A);
var obj = new A(fixed_double_elements);
function move_x(dst, obj) { dst[0] = obj.x; }
var doubles = [0.5];
move_x(doubles, obj);
move_x(doubles, obj);
%OptimizeFunctionOnNextCall(move_x);
move_x(doubles, obj);
assertTrue(doubles[0] !== undefined);
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