Matthias Braun 959a8c974d LiveIntervalAnalysis: findLastUseBefore() must ignore undef uses. ...

undef uses are no real uses of a register and must be ignored by
findLastUseBefore() so that handleMove() does not produce invalid live
intervals in some cases.

This fixed http://llvm.org/PR28083

llvm-svn: 272446

2016-06-11 00:31:28 +00:00

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