Dimitry Andric df57b3139f Pull in r335365 from upstream llvm trunk (by Krzysztof Parzyszek):
Initialize LiveRegs once in BranchFolder::mergeCommonTails

This should fix '(TRI && "LivePhysRegs is not initialized."' assertions
when building the lang/qt5-qml port in certain configurations.

Approved by:	re (kib)
Reported by:	Piotr Kubaj <pkubaj@anongoth.pl>
PR:		231355
MFC after:	3 days
2018-09-14 19:25:23 +00:00
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