Wei Mi ebb9327759 [LoopUnswitch] Fix a simple bug which disables loop unswitch for select statement ...

This is to fix PR34257. rL309059 takes an early return when FindLIVLoopCondition
fails to find a loop invariant condition. This is wrong and it will disable loop
unswitch for select. The patch fixes the bug.

Differential Revision: https://reviews.llvm.org/D36985

llvm-svn: 312045

2017-08-29 21:45:11 +00:00

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AMDGPU

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2006-06-13-SingleEntryPHI.ll

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2006-06-27-DeadSwitchCase.ll

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2007-05-09-tl.ll

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2007-05-09-Unreachable.ll

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2007-07-12-ExitDomInfo.ll

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2007-07-13-DomInfo.ll

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2007-07-18-DomInfo.ll

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2007-08-01-Dom.ll

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2007-08-01-LCSSA.ll

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2007-10-04-DomFrontier.ll

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2008-06-02-DomInfo.ll

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2008-06-17-DomFrontier.ll

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2008-11-03-Invariant.ll

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2010-11-18-LCSSA.ll

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2011-06-02-CritSwitch.ll

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2011-09-26-EHCrash.ll

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2011-11-18-SimpleSwitch.ll

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2011-11-18-TwoSwitches-Threshold.ll

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2011-11-18-TwoSwitches.ll

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2012-04-02-IndirectBr.ll

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2012-04-30-LoopUnswitch-LPad-Crash.ll

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2012-05-20-Phi.ll

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2015-06-17-Metadata.ll

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2015-09-18-Addrspace.ll

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basictest.ll

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cleanuppad.ll

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copy-metadata.ll

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crash.ll

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elseif-non-exponential-behavior.ll

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exponential-behavior.ll

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guards.ll

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infinite-loop.ll

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LIV-loop-condtion.ll

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msan.ll

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pr32818.ll

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preserve-analyses.ll

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simplify-with-nonvalness.ll

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trivial-unswitch.ll

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unswitch-equality-undef.ll

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unswitch-select.ll

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