Frits van Bommel 1f7a2a7884 Teach stack promotion to walk the CFG when a potential reuse of an allocation ...

is found to see if it can actually happen instead of just assuming it will.

This allows it to catch cases like
{{{
int i;
Foo f;
while (cond(i))
    f = new Foo(i++);
return f.value;
}}}
where it previously wouldn't because a phi using the allocation would appear in
the condition block to propagate it to the use after the loop.

2009-06-11 02:04:44 +02:00

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