Juneyoung Lee b23e310c99 [InstCombine] Fully disable select to and/or i1 folding ... This is a patch that disables the poison-unsafe select -> and/or i1 folding. It has been blocking D72396 and also has been the source of a few miscompilations described in llvm.org/pr49688 . D99674 conditionally blocked this folding and successfully fixed the latter one. The former one was still blocked, and this patch addresses it. Note that a few test functions that has `_logical` suffix are now deoptimized. These are created by @nikic to check the impact of disabling this optimization by copying existing original functions and replacing and/or with select. I can see that most of these are poison-unsafe; they can be revived by introducing freeze instruction. I left comments at fcmp + select optimizations (or-fcmp.ll, and-fcmp.ll) because I think they are good targets for freeze fix. Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D101191		2021-05-06 09:29:52 +09:00
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2003-04-25-AssertFail.ll
2003-05-12-PreheaderExitOfChild.ll
2003-08-15-PreheadersFail.ll
2003-12-10-ExitBlocksProblem.ll
2004-02-05-DominatorInfoCorruption.ll
2004-03-15-IncorrectDomUpdate.ll
2004-04-01-IncorrectDomUpdate.ll
2004-04-12-LoopSimplify-SwitchBackedges.ll
2004-04-13-LoopSimplifyUpdateDomFrontier.ll
2007-10-28-InvokeCrash.ll
2010-07-15-IncorrectDomFrontierUpdate.ll
2010-12-26-PHIInfiniteLoop.ll
2011-12-14-LandingpadHeader.ll
2012-03-20-indirectbr.ll
ashr-crash.ll
basictest.ll
convergent.ll
dbg-loc.ll
do-preheader-dbg-inseltpoison.ll
do-preheader-dbg.ll
dup-preds.ll
for-preheader-dbg.ll
hardertest.ll
indirectbr-backedge.ll
indirectbr.ll
merge-exits.ll	[InstCombine] Fully disable select to and/or i1 folding	2021-05-06 09:29:52 +09:00
notify-scev.ll
phi-node-simplify.ll
pr26682.ll
pr28272.ll
pr30454.ll
pr33494.ll
preserve-llvm-loop-metadata.ll
preserve-scev.ll
single-backedge.ll
unreachable-loop-pred.ll
update_latch_md.ll