https://bugs.kde.org/show_bug.cgi?id=386945

--- Comment #2 from Julian Seward <jsew...@acm.org> ---
This is caused by insufficiently precise definedness analysis for
(1) count leading zero operations (Iop_Clz32, Iop_Clz64)
(2) PPC integer compares (Iop_CmpORD family)
(3) integer subtract

Here's an initial, hacky patch that fixes (1) and (2).  Along with
use of the flag --expensive-definedness-checks=yes, which fixes (3),
it makes the test case run quiet.

Can you give it a try on something larger?

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