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From: Julian S. <js...@ac...> - 2017-04-26 14:11:25
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Carl,
There are various refinements in memcheck/mc_translate.c that are related
to accurate definedness tracking in this kind of case, for
Iop_Cmp{32,64}, Iop_{Add,Sub}{32,64}, and Iop_CmpORD{32,64}{S,U}, the
last of which are PPC64 specials. But they don't seem to have had any
effect here.
To diagnose this we really need to see the front end translation of the
assembly fragment you showed, plus the uninstrumented, optimised IR
relating to it. You should be able to get those with --tool=none
--trace-flags=10001000 --trace-notbelow=<whatever>. Please get those
and then we can see what's going on. Maybe!
J
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