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09497f0d9e6f2794245347cd7228d88b2fd94de3
archived-llvm/test/Transforms/IndVarSimplify
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Philip Reames d406311e80 [IndVars] Use exit count reasoning to discharge obviously untaken exits 
Continue in the spirit of D63618, and use exit count reasoning to prove away loop exits which can not be taken since the backedge taken count of the loop as a whole is provably less than the minimal BE count required to take this particular loop exit.

As demonstrated in the newly added tests, this triggers in a number of cases where IndVars was previously unable to discharge obviously redundant exit tests. And some not so obvious ones.

Differential Revision: https://reviews.llvm.org/D63733



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365920 91177308-0d34-0410-b5e6-96231b3b80d8
2019-07-12 17:05:35 +00:00
..
AMDGPU
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2019-04-17 04:52:47 +00:00
NVPTX
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2019-04-17 04:52:47 +00:00
2002-09-09-PointerIndVar.ll
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2019-04-17 04:52:47 +00:00
2003-04-16-ExprAnalysis.ll
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2019-04-17 04:52:47 +00:00
2003-09-23-NotAtTop.ll
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2019-04-17 04:52:47 +00:00
2003-12-10-RemoveInstrCrash.ll
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2019-04-17 04:52:47 +00:00
2003-12-15-Crash.ll
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2019-04-17 04:52:47 +00:00
2004-03-10-PHIInsertionBug.ll
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2019-04-17 04:52:47 +00:00
2004-04-05-InvokeCastCrash.ll
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2019-04-17 04:52:47 +00:00
2004-04-07-ScalarEvolutionCrash.ll
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2019-04-17 04:52:47 +00:00
2005-02-11-InvokeCrash.ll
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2019-04-17 04:52:47 +00:00
2005-02-17-TruncateExprCrash.ll
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2019-04-17 04:52:47 +00:00
2005-02-26-ExitValueCompute.ll
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2019-04-17 04:52:47 +00:00
2005-06-15-InstMoveCrash.ll
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2005-11-18-Crash.ll
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2019-04-17 04:52:47 +00:00
2006-03-31-NegativeStride.ll
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2019-04-17 04:52:47 +00:00
2006-06-16-Indvar-LCSSA-Crash.ll
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2019-04-17 04:52:47 +00:00
2006-09-20-LFTR-Crash.ll
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2019-04-17 04:52:47 +00:00
2006-12-10-BitCast.ll
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2019-04-17 04:52:47 +00:00
2007-01-06-TripCount.ll
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2019-04-17 04:52:47 +00:00
2007-06-06-DeleteDanglesPtr.ll
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2019-04-17 04:52:47 +00:00
2007-11-23-BitcastCrash.ll
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2019-04-17 04:52:47 +00:00
2008-06-15-SCEVExpanderBug.ll
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2019-04-17 04:52:47 +00:00
2008-09-02-IVType.ll
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2019-04-17 04:52:47 +00:00
2008-10-03-CouldNotCompute.ll
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2019-04-17 04:52:47 +00:00
2008-11-25-APFloatAssert.ll
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2019-04-17 04:52:47 +00:00
2009-04-14-shorten_iv_vars.ll
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2019-04-17 04:52:47 +00:00
2009-04-15-shorten-iv-vars-2.ll
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2019-04-17 04:52:47 +00:00
2009-04-22-IndvarCrash.ll
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2019-04-17 04:52:47 +00:00
2009-04-27-Floating.ll
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2019-04-17 04:52:47 +00:00
2009-05-24-useafterfree.ll
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2019-04-17 04:52:47 +00:00
2011-09-10-widen-nsw.ll
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2019-04-17 04:52:47 +00:00
2011-09-19-vectoriv.ll
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2019-04-17 04:52:47 +00:00
2011-09-27-hoistsext.ll
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2019-04-17 04:52:47 +00:00
2011-10-27-lftrnull.ll
Fix a bug w/inbounds invalidation in LFTR (recommit)
2019-06-17 20:32:22 +00:00
2011-11-01-lftrptr.ll
[LFTR] Use SCEVExpander for the pointer limit case instead of manual IR gen
2019-07-03 20:03:46 +00:00
2011-11-15-multiexit.ll
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2019-04-17 04:52:47 +00:00
2011-11-17-selfphi.ll
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2019-04-17 04:52:47 +00:00
2012-10-19-congruent-constant.ll
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2019-04-17 04:52:47 +00:00
2014-06-21-congruent-constant.ll
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2019-04-17 04:52:47 +00:00
ada-loops.ll
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ashr-tripcount.ll
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avoid-i0.ll
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backedge-on-min-max.ll
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bec-cmp.ll
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canonicalize-cmp.ll
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casted-argument.ll
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2019-04-17 04:52:47 +00:00
const_phi.ll
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constant_result.ll
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constant-fold.ll
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crash.ll
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2019-04-17 04:52:47 +00:00
dangling-use.ll
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divide-pointer.ll
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dont-recompute.ll
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2019-04-17 04:52:47 +00:00
drop-exact.ll
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2019-04-17 04:52:47 +00:00
elim-extend.ll
[LFTR] Hoist extend expressions outside of loops w/o waiting for LICM
2019-07-03 18:18:36 +00:00
eliminate-comparison.ll
[IndVars] Remove dead instructions after folding trivial loop exit
2019-06-23 17:06:57 +00:00
eliminate-exit.ll
[IndVars] Use exit count reasoning to discharge obviously untaken exits
2019-07-12 17:05:35 +00:00
eliminate-max.ll
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2019-04-17 04:52:47 +00:00
eliminate-rem.ll
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2019-04-17 04:52:47 +00:00
eliminate-sat.ll
[SimplifyIndVar] Simplify non-overflowing saturating add/sub
2019-06-15 08:48:52 +00:00
eliminate-trunc.ll
[IndVars] Remove dead instructions after folding trivial loop exit
2019-06-23 17:06:57 +00:00
exit_value_test2.ll
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2019-04-17 04:52:47 +00:00
exit_value_test3.ll
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2019-04-17 04:52:47 +00:00
exit_value_tests.ll
Teach getSCEVAtScope how to handle loop phis w/invariant operands in loops w/taken backedges
2019-06-17 21:06:17 +00:00
floating-point-iv.ll
[Tests] Autogen and improve test readability
2019-06-23 17:13:53 +00:00
full_widening.ll
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2019-04-17 04:52:47 +00:00
huge_muls.ll
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2019-04-17 04:52:47 +00:00
indirectbr.ll
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2019-04-17 04:52:47 +00:00
infer-poison-flags.ll
[Tests] Add poison inference tests for indvars showing both existing transforms, and some room for improvement
2019-06-05 18:00:59 +00:00
inner-loop-by-latch-cond.ll
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2019-04-17 04:52:47 +00:00
inner-loop.ll
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interesting-invoke-use.ll
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2019-04-17 04:52:47 +00:00
iterationCount_zext_or_trunc.ll
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2019-04-17 04:52:47 +00:00
iv-fold.ll
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iv-sext.ll
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2019-04-17 04:52:47 +00:00
iv-widen-elim-ext.ll
[LFTR] Hoist extend expressions outside of loops w/o waiting for LICM
2019-07-03 18:18:36 +00:00
iv-widen.ll
[LFTR] Hoist extend expressions outside of loops w/o waiting for LICM
2019-07-03 18:18:36 +00:00
iv-zext.ll
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2019-04-17 04:52:47 +00:00
lcssa-preservation.ll
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2019-04-17 04:52:47 +00:00
lftr_disabled.ll
[IndVarSimplify] Generate full checks for some LFTR tests; NFC
2019-04-20 12:05:53 +00:00
lftr-address-space-pointers.ll
[LFTR] Use SCEVExpander for the pointer limit case instead of manual IR gen
2019-07-03 20:03:46 +00:00
lftr-dead-ivs.ll
[LFTR] Use SCEVExpander for the pointer limit case instead of manual IR gen
2019-07-03 20:03:46 +00:00
lftr-multi-exit.ll
[Tests] Add a tricky LFTR case for documentation purposes
2019-06-20 17:16:53 +00:00
lftr-pr20680.ll
[LFTR] Regenerate test checks; NFC
2019-07-06 08:54:15 +00:00
lftr-pr31181.ll
[IndVarSimplify] Fixup nowrap flags during LFTR (PR31181)
2019-06-01 09:40:18 +00:00
lftr-pr41998.ll
[LFTR] Use SCEVExpander for the pointer limit case instead of manual IR gen
2019-07-03 20:03:46 +00:00
lftr-promote.ll
[IndVarSimplify] Generate full checks for some LFTR tests; NFC
2019-04-20 12:05:53 +00:00
lftr-reuse.ll
[LFTR] Use SCEVExpander for the pointer limit case instead of manual IR gen
2019-07-03 20:03:46 +00:00
lftr.ll
[LFTR] Hoist extend expressions outside of loops w/o waiting for LICM
2019-07-03 18:18:36 +00:00
loop_evaluate7.ll
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loop_evaluate8.ll
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loop_evaluate9.ll
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loop_evaluate10.ll
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2019-04-17 04:52:47 +00:00
loop_evaluate11.ll
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2019-04-17 04:52:47 +00:00
loop_evaluate_1.ll
[SCEV] Pass NoWrapFlags when expanding an AddExpr
2019-06-14 09:19:41 +00:00
loop_evaluate_2.ll
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loop_evaluate_3.ll
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loop_evaluate_4.ll
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loop_evaluate_5.ll
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2019-04-17 04:52:47 +00:00
loop_evaluate_6.ll
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2019-04-17 04:52:47 +00:00
loop-invariant-conditions.ll
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2019-04-17 04:52:47 +00:00
lrev-existing-umin.ll
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2019-04-17 04:52:47 +00:00
masked-iv.ll
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2019-04-17 04:52:47 +00:00
no-iv-rewrite.ll
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2019-04-17 04:52:47 +00:00
overflow-intrinsics.ll
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2019-04-17 04:52:47 +00:00
phi-uses-value-multiple-times.ll
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2019-04-17 04:52:47 +00:00
polynomial-expand.ll
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2019-04-17 04:52:47 +00:00
post-inc-range.ll
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2019-04-17 04:52:47 +00:00
pr18223.ll
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pr22222.ll
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pr24356.ll
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pr24783.ll
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2019-04-17 04:52:47 +00:00
pr24804.ll
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pr24952.ll
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pr24956.ll
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pr25047.ll
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pr25051.ll
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pr25060.ll
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pr25360.ll
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2019-04-17 04:52:47 +00:00
pr25421.ll
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2019-04-17 04:52:47 +00:00
pr25576.ll
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2019-04-17 04:52:47 +00:00
pr25578.ll
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2019-04-17 04:52:47 +00:00
pr26973.ll
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pr26974.ll
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pr27133.ll
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2019-04-17 04:52:47 +00:00
pr28935.ll
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pr32045.ll
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2019-04-17 04:52:47 +00:00
pr35406.ll
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2019-04-17 04:52:47 +00:00
pr38674.ll
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2019-04-17 04:52:47 +00:00
pr38855.ll
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2019-04-17 04:52:47 +00:00
pr39673.ll
Teach getSCEVAtScope how to handle loop phis w/invariant operands in loops w/taken backedges
2019-06-17 21:06:17 +00:00
pr40454.ll
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2019-04-17 04:52:47 +00:00
preserve-signed-wrap.ll
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2019-04-17 04:52:47 +00:00
promote-iv-to-eliminate-casts.ll
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2019-04-17 04:52:47 +00:00
replace-iv-with-loop-invariant.ll
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2019-04-17 04:52:47 +00:00
replace-loop-exit-folds.ll
[SCEV] Add explicit representations of umin/smin
2019-05-07 15:28:47 +00:00
replace-sdiv-by-udiv.ll
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2019-04-17 04:52:47 +00:00
replace-srem-by-urem.ll
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2019-04-17 04:52:47 +00:00
rewrite-loop-exit-value.ll
[IndVars] Extend reasoning about loop invariant exits to non-header blocks
2019-05-14 17:20:10 +00:00
scev-phi-debug-info.ll
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2019-04-17 04:52:47 +00:00
scevexpander-phi-base-case.ll
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2019-04-17 04:52:47 +00:00
sharpen-range.ll
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2019-04-17 04:52:47 +00:00
shrunk-constant.ll
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2019-04-17 04:52:47 +00:00
signed-trip-count.ll
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2019-04-17 04:52:47 +00:00
single-element-range.ll
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2019-04-17 04:52:47 +00:00
sink-alloca.ll
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2019-04-17 04:52:47 +00:00
sink-from-preheader.ll
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2019-04-17 04:52:47 +00:00
sink-trapping.ll
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2019-04-17 04:52:47 +00:00
strengthen-overflow.ll
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2019-04-17 04:52:47 +00:00
tripcount_compute.ll
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2019-04-17 04:52:47 +00:00
tripcount_infinite.ll
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2019-04-17 04:52:47 +00:00
udiv-invariant-but-traps.ll
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2019-04-17 04:52:47 +00:00
udiv.ll
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2019-04-17 04:52:47 +00:00
uglygep.ll
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2019-04-17 04:52:47 +00:00
ult-sub-to-eq.ll
[LFTR] Hoist extend expressions outside of loops w/o waiting for LICM
2019-07-03 18:18:36 +00:00
use-range-metadata.ll
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2019-04-17 04:52:47 +00:00
variable-stride-ivs-0.ll
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2019-04-17 04:52:47 +00:00
variable-stride-ivs-1.ll
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2019-04-17 04:52:47 +00:00
verify-scev.ll
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2019-04-17 04:52:47 +00:00
widen-loop-comp.ll
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2019-04-17 04:52:47 +00:00
widen-nsw.ll
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2019-04-17 04:52:47 +00:00
zext-nuw.ll
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2019-04-17 04:52:47 +00:00