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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - The liveness pruning done by ObjectAllocationSinkingPhase ignores the possibility of an object's bytecode liveness being longer than its DFG liveness"
href="https://bugs.webkit.org/show_bug.cgi?id=144945#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - The liveness pruning done by ObjectAllocationSinkingPhase ignores the possibility of an object's bytecode liveness being longer than its DFG liveness"
href="https://bugs.webkit.org/show_bug.cgi?id=144945">bug 144945</a>
from <span class="vcard"><a class="email" href="mailto:fpizlo@apple.com" title="Filip Pizlo <fpizlo@apple.com>"> <span class="fn">Filip Pizlo</span></a>
</span></b>
<pre>Another test:
var global = null;
function foo(p, q) {
var o = {f:42};
if (p)
global = o;
var tmp = q + 1;
return o.f + tmp;
}
noInline(foo);
var lastObject = null;
function validateEscape(when) {
if (global === lastObject)
throw "Error: bad value in global " + when + ", identical to lastObject.";
if (global === null || !(typeof global == "object"))
throw "Error: bad value in global " + when + ": it's not an object.";
if (global.f != 42)
throw "Error: bad value in global " + when + ": f isn't 42, it's: " + global.f;
lastObject = global;
global = null;
}
for (var i = 0; i < 10000; ++i) {
var escape = !!(i & 1);
var result = foo(escape, 42);
if (result != 42 + 42 + 1)
throw "Error: bad result: " + result;
if (escape)
validateEscape("in loop");
else if (global !== null)
throw "Error: bad value in global: " + global;
}
var result = foo(true, 2147483647);
if (result != 42 + 2147483647 + 1)
throw "Error: bad result at end: " + result;
validateEscape("at end");</pre>
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