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Bug 1056795 - Optimize ArrayPushDense. r=bhackett
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@ -401,6 +401,21 @@ bool
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ArrayPushDense(JSContext *cx, HandleObject obj, HandleValue v, uint32_t *length)
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{
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JS_ASSERT(obj->is<ArrayObject>());
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JS_ASSERT(obj->as<ArrayObject>().lengthIsWritable());
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JS_ASSERT(!ObjectMayHaveExtraIndexedProperties(obj));
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uint32_t idx = obj->as<ArrayObject>().length();
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JSObject::EnsureDenseResult result = obj->ensureDenseElements(cx, idx, 1);
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if (result == JSObject::ED_FAILED)
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return false;
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if (result == JSObject::ED_OK) {
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obj->setDenseElement(idx, v);
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MOZ_ASSERT(idx < INT32_MAX);
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*length = idx + 1;
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obj->as<ArrayObject>().setLengthInt32(*length);
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return true;
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}
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JS::AutoValueArray<3> argv(cx);
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argv[0].setUndefined();
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