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Commit e009fad3 authored by Nemanja Ivanovic's avatar Nemanja Ivanovic
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[PowerPC] Remove UB from PPCInstrInfo when handling rotates fed by constants 

As pointed out in https://bugs.llvm.org/show_bug.cgi?id=45232 this code can
end up shifting a 64-bit unsigned value left by 64 bits. Althought this works
as expected on some platforms it is definitely UB. This patch removes the UB
and adds the associated test case.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=45232
parent 746bd860
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