llvm-project/llvm/test/Transforms/IndVarSimplify
Roman Lebedev d480f968ad
Revert "[SCEV] Model `ashr exact x, C` as `(abs(x) EXACT/u (1<<C)) * signum(x)`"
As being discussed in https://reviews.llvm.org/D100721,
this modelling is lossy, we can't reconstruct `ash`/`ashr exact`
from it, which means that whenever we actually expand the IR,
we've just pessimized the code..

It would be good to model this pattern, after all it comes up every time
you want to compute a distance between two pointers, but not at this cost.

This reverts commit ec54867df5.
2021-04-18 16:26:45 +03:00
..
AMDGPU
ARM [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
NVPTX
X86 [PassManager] Run additional LICM before LoopRotate 2021-04-02 11:11:42 +03:00
2002-09-09-PointerIndVar.ll
2003-04-16-ExprAnalysis.ll
2003-09-23-NotAtTop.ll
2003-12-10-RemoveInstrCrash.ll
2003-12-15-Crash.ll
2004-03-10-PHIInsertionBug.ll
2004-04-05-InvokeCastCrash.ll
2004-04-07-ScalarEvolutionCrash.ll
2005-02-11-InvokeCrash.ll
2005-02-17-TruncateExprCrash.ll
2005-02-26-ExitValueCompute.ll
2005-06-15-InstMoveCrash.ll
2005-11-18-Crash.ll
2006-03-31-NegativeStride.ll
2006-06-16-Indvar-LCSSA-Crash.ll
2006-09-20-LFTR-Crash.ll
2006-12-10-BitCast.ll
2007-01-06-TripCount.ll
2007-06-06-DeleteDanglesPtr.ll
2007-11-23-BitcastCrash.ll
2008-06-15-SCEVExpanderBug.ll
2008-09-02-IVType.ll
2008-10-03-CouldNotCompute.ll
2008-11-25-APFloatAssert.ll
2009-04-22-IndvarCrash.ll
2009-04-27-Floating.ll
2009-05-24-useafterfree.ll
2011-09-10-widen-nsw.ll
2011-09-19-vectoriv.ll
2011-09-27-hoistsext.ll
2011-10-27-lftrnull.ll [SCEV] Add false->any implication 2021-03-19 11:29:48 +07:00
2011-11-01-lftrptr.ll Reland [SCEV] Improve modelling for (null) pointer constants 2021-03-13 16:05:34 +03:00
2011-11-17-selfphi.ll
2012-10-19-congruent-constant.ll
2014-06-21-congruent-constant.ll [NewPM][LoopUnswitch] Pin loop-unswitch to legacy PM or use simple-loop-unswitch 2020-08-06 10:56:00 -07:00
2020-12-15-trunc-bug-expensive-range-inference.ll [SCEV] Add missing type check into getRangeForAffineNoSelfWrappingAR 2020-12-15 14:50:32 +07:00
ada-loops.ll
addrec_no_exec_on_every_iteration.ll Return "[SCEV] Prove implicaitons via AddRec start" 2020-10-08 11:15:35 +07:00
ashr-expansion.ll Revert "[SCEV] Model `ashr exact x, C` as `(abs(x) EXACT/u (1<<C)) * signum(x)`" 2021-04-18 16:26:45 +03:00
ashr-tripcount.ll
avoid-i0.ll
backedge-on-min-max.ll
bec-cmp.ll
canonicalize-cmp.ll [Test] Auto-generated checks for some IndVarSimplify tests 2020-09-08 11:15:40 +07:00
casted-argument.ll
checks_against_min_value.ll [IndVars] Provide eliminateIVComparison with context 2021-03-19 12:28:22 +07:00
const_phi.ll
constant-fold.ll
constant_result.ll
crash.ll
dangling-use.ll
divide-pointer.ll
dont-recompute.ll Revert "[SCEV] rewriteLoopExitValues(): even if have hard uses, still rewrite if cheap (PR44668)" 2020-04-03 20:15:04 +03:00
drop-exact.ll
elim-extend.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
eliminate-comparison.ll [IndVars] Sharpen context in eliminateIVComparison 2021-03-22 11:55:57 +07:00
eliminate-exit-no-dl.ll [IndVars] Fix a subtle bug in optimizeLoopExits 2019-07-23 17:45:11 +00:00
eliminate-exit.ll [IndVars] Fix sort comparator. 2020-02-27 17:25:18 -08:00
eliminate-max.ll
eliminate-overflow-modified.ll [IndVarSimplify] Fix Modified status for removal of overflow intrinsics 2020-09-29 13:20:59 +02:00
eliminate-rem.ll
eliminate-sat.ll [SimplifyIndVar] Simplify non-overflowing saturating add/sub 2019-06-15 08:48:52 +00:00
exit_value_test2.ll [LoopDeletion] Break backedge of outermost loops when known not taken 2021-01-10 16:02:33 -08:00
exit_value_test3.ll
exit_value_tests.ll [SimplifyCFG] MergeBlockIntoPredecessor() already knows how to preserve DomTree 2020-12-17 01:03:49 +03:00
floating-point-iv.ll [SCEV] Drop cached ranges of AddRecs after flag update 2020-11-10 12:37:12 +07:00
full_widening.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
indirectbr.ll
infer-poison-flags.ll [Test] Auto-update for some tests 2020-10-14 17:03:33 +07:00
interesting-invoke-use.ll OpaquePtr: Update more tests to use typed sret 2020-11-20 20:08:43 -05:00
iterationCount_zext_or_trunc.ll
iv-fold.ll
iv-sext.ll
iv-widen-elim-ext.ll [IndVarSimplify] Extend previous special case for load use instruction to any narrow type loop variant to avoid extra trunc instruction 2020-03-05 16:27:59 -05:00
iv-zext.ll
lcssa-preservation.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
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 [Test] Auto-update for some tests 2020-10-14 17:03:33 +07:00
lftr-multi-exit.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
lftr-pr20680.ll [LoopPred] Selectively disable to preserve test cases 2019-11-06 15:41:57 -08:00
lftr-pr31181.ll [Test] Auto-update for some tests 2020-10-14 17:03:33 +07:00
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
lftr-reuse.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
lftr.ll [Test] Auto-update for some tests 2020-10-14 17:03:33 +07:00
lftr_disabled.ll
loop-predication.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
loop_evaluate7.ll
loop_evaluate8.ll
loop_evaluate9.ll OpaquePtr: Bulk update tests to use typed byval 2020-11-20 14:00:46 -05:00
loop_evaluate11.ll
loop_evaluate_1.ll [SimplifyCFG] Teach FoldTwoEntryPHINode() to preserve DomTree 2020-12-20 00:18:33 +03:00
loop_evaluate_2.ll [SimplifyCFG] Teach FoldTwoEntryPHINode() to preserve DomTree 2020-12-20 00:18:33 +03:00
loop_evaluate_3.ll
loop_evaluate_4.ll
loop_evaluate_5.ll
loop_evaluate_6.ll
lrev-existing-umin.ll Revert "[SCEV] rewriteLoopExitValues(): even if have hard uses, still rewrite if cheap (PR44668)" 2020-04-03 20:15:04 +03:00
masked-iv.ll
monotonic_checks.ll Return "[IndVars] Remove monotonic checks with unknown exit count" 2020-10-28 18:51:40 +07:00
no-iv-rewrite.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
phi-uses-value-multiple-times.ll
post-inc-range.ll
pr18223.ll [Test] Auto-generated checks for some IndVarSimplify tests 2020-09-08 11:15:40 +07:00
pr22222.ll
pr24783.ll
pr24952.ll
pr25060.ll
pr25578.ll
pr26974.ll
pr28705.ll Revert "[SCEV] rewriteLoopExitValues(): even if have hard uses, still rewrite if cheap (PR44668)" 2020-04-03 20:15:04 +03:00
pr32045.ll
pr38674.ll [LoopPred] Selectively disable to preserve test cases 2019-11-06 15:41:57 -08:00
pr38855.ll [FunctionAttrs] Rename functionattrs -> function-attrs 2020-07-28 09:09:13 -07:00
pr39673.ll Revert "[SCEV] rewriteLoopExitValues(): even if have hard uses, still rewrite if cheap (PR44668)" 2020-04-03 20:15:04 +03:00
pr40454.ll
pr45835.ll [IndVarSimplify][LoopUtils] Avoid TOCTOU/ordering issues (PR45835) 2020-05-21 13:05:55 +03:00
predicated_ranges.ll [IndVars] Use isLoopBackedgeGuardedByCond for last iteration check 2020-11-26 12:37:21 +07:00
preserve-memoryssa.ll [IndVarSimplify] Fix for MemorySSA preserve. 2020-01-23 11:06:16 -08:00
preserve-signed-wrap.ll
promote-iv-to-eliminate-casts.ll Revert D89381 "[SCEV] Recommit "Use nw flag and symbolic iteration count to sharpen ranges of AddRecs", attempt 2" 2020-10-20 21:03:58 -07:00
replace-loop-exit-folds.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
replace-sdiv-by-udiv.ll
replace-srem-by-urem.ll
rewrite-loop-exit-value.ll
rewrite-loop-exit-values-phi.ll [IndVarSimplify] Fix Modified status when handling dead PHI nodes 2020-11-26 14:28:21 +01:00
rlev-add-me.ll [IndVars] Fix a bug noticed by inspection 2019-08-23 04:03:23 +00:00
scev-expander-preserve-lcssa.ll [test] Fix scev-expander-preserve-lcssa.ll under NPM 2020-12-10 09:46:08 -08:00
scevexpander-phi-base-case.ll
sentinel.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
shared-exit-between-nested-loop.ll [IndVarSimplify] Notify top most loop to drop cached exit counts 2020-11-19 15:37:54 +08:00
sharpen-range.ll
shrunk-constant.ll [test] Fix shrunk-constant.ll under NPM 2020-10-21 21:21:24 -07:00
signed-trip-count.ll
simplify-pointer-arithmetic.ll [IndVars] Add test cases inspired by PR48965. 2021-02-25 15:54:18 +00:00
single-element-range.ll
sink-alloca.ll
sink-from-preheader.ll [LoopPred] Selectively disable to preserve test cases 2019-11-06 15:41:57 -08:00
sink-trapping.ll
strengthen-overflow.ll
tripcount_compute.ll
tripcount_infinite.ll [NFCI][SimplifyCFG] Mark all the SimplifyCFG tests that already don't invalidate DomTree as such 2020-12-17 01:03:49 +03:00
trivial-checks.ll [Test] Add tests showing that IndVars cannot prove (X + 1 > X) 2020-09-17 22:37:43 +07:00
trivial-guard.ll [SCEV] Add false->any implication 2021-03-19 11:29:48 +07:00
udiv-invariant-but-traps.ll
udiv.ll
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
variable-stride-ivs-0.ll
widen-i32-i8ptr.ll Reland [SCEV] Improve modelling for (null) pointer constants 2021-03-13 16:05:34 +03:00
widen-loop-comp.ll [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 2021-03-06 21:52:46 +03:00
zext-nuw.ll [IndVars] Regenerate test checks (NFC) 2020-11-02 22:31:11 +01:00