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clang-p2996/llvm/test/Analysis/ScalarEvolution
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Julian Nagele 7c8e05aa45 [SCEV] Collect and merge loop guards through PHI nodes with multiple incoming values (#113915) 
This patch aims to strengthen collection of loop guards by processing
PHI nodes with multiple incoming values as follows: collect guards for
all incoming values/blocks and try to merge them into a single one for
the PHI node.

The goal is to determine tighter bounds on the trip counts of scalar
tail loops after vectorization, helping to avoid unnecessary transforms.
In particular we'd like to avoid vectorizing scalar tails of
hand-vectorized loops, for example in
[Transforms/PhaseOrdering/X86/pr38280.ll](231e03ba7e/llvm/test/Transforms/PhaseOrdering/X86/pr38280.ll),
discovered via https://github.com/llvm/llvm-project/pull/108190

Compile-time impact: https://llvm-compile-time-tracker.com/compare.php?from=a55248789ed3f653740e0723d016203b9d585f26&to=500e4c46e79f60b93b11a752698c520e345948e3&stat=instructions:u

PR: https://github.com/llvm/llvm-project/pull/113915
2024-11-15 10:03:08 +00:00
..
2007-07-15-NegativeStride.ll
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2007-08-06-MisinterpretBranch.ll
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2007-08-06-Unsigned.ll
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2007-09-27-LargeStepping.ll
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2007-11-14-SignedAddRec.ll
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2007-11-18-OrInstruction.ll
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2008-02-11-ReversedCondition.ll
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2008-02-12-SMAXTripCount.ll
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2008-02-15-UMax.ll
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2008-05-25-NegativeStepToZero.ll
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2008-06-12-BinomialInt64.ll
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2008-07-12-UnneededSelect1.ll
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2008-07-12-UnneededSelect2.ll
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2008-07-19-InfiniteLoop.ll
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2008-07-19-WrappingIV.ll
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2008-07-29-SGTTripCount.ll
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2008-07-29-SMinExpr.ll
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2008-08-04-IVOverflow.ll
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2008-08-04-LongAddRec.ll
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2008-11-02-QuadraticCrash.ll
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2008-11-15-CubicOOM.ll
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2008-11-18-LessThanOrEqual.ll
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2008-11-18-Stride1.ll
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2008-11-18-Stride2.ll
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2008-12-08-FiniteSGE.ll
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2008-12-11-SMaxOverflow.ll
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2008-12-14-StrideAndSigned.ll
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2008-12-15-DontUseSDiv.ll
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2009-01-02-SignedNegativeStride.ll
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2009-04-22-TruncCast.ll
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2009-05-09-PointerEdgeCount.ll
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2009-07-04-GroupConstantsWidthMismatch.ll
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2010-09-03-RequiredTransitive.ll
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2011-03-09-ExactNoMaxBECount.ll
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2011-04-26-FoldAddRec.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
2011-10-04-ConstEvolve.ll
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2012-03-26-LoadConstant.ll
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2012-05-18-LoopPredRecurse.ll
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2012-05-29-MulAddRec.ll
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abs-intrinsic.ll
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add-expr-pointer-operand-sorting.ll
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add-like-or.ll
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addrec-computed-during-addrec-calculation.ll
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addrec-sub-nsw.ll
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alloca.ll
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and-xor.ll
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annotation-intrinsics.ll
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ashr.ll
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avoid-assume-hang.ll
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avoid-infinite-recursion-0.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
avoid-infinite-recursion-1.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
avoid-smax-0.ll
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avoid-smax-1.ll
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backedge-taken-count-guard-info-with-multiple-predecessors.ll
[SCEV] Collect and merge loop guards through PHI nodes with multiple incoming values (#113915)
2024-11-15 10:03:08 +00:00
backedge-taken-count-guard-info.ll
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becount-invalidation.ll
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binomial-explision.ll
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cache_loop_exit_limit.ll
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constant_condition.ll
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cycled_phis.ll
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decrementing_addrecs.ll
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different-loops-recs.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
div-overflow.ll
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do-loop.ll
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exact_iter_count.ll
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exact-exit-count-more-precise.ll
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exhaustive-trip-counts.ll
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exit-count-non-strict.ll
[Analysis] Teach isDereferenceableAndAlignedInLoop about SCEV predicates (#106562)
2024-09-23 09:56:37 +01:00
exit-count-select-safe.ll
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exit-count-select.ll
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expander-replace-congruent-ivs.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
exponential-behavior.ll
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ext_min_max.ll
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ext-antecedent.ll
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extract-highbits-sameconstmask.ll
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extract-highbits-variablemask.ll
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extract-lowbits-sameconstmask.ll
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extract-lowbits-variablemask.ll
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finite-trip-count.ll
[Analysis] Teach isDereferenceableAndAlignedInLoop about SCEV predicates (#106562)
2024-09-23 09:56:37 +01:00
flags-from-poison-dbg.ll
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flags-from-poison-noautogen.ll
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flags-from-poison.ll
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flattened-0.ll
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fold.ll
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guards.ll
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how-far-to-zero.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
huge_expression_limit.ll
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huge-trip-multiple.ll
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implied-via-addition.ll
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implied-via-division.ll
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incorrect-exit-count.ll
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incorrect-nsw.ll
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increasing-or-decreasing-iv.ll
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infer-prestart-no-wrap.ll
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infer-via-ranges.ll
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inner-loop-by-latch-cond-unknown.ll
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invalidation.ll
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iv-poison.ll
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latch-dominating-conditions.ll
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limit-depth.ll
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load-with-range-metadata.ll
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load.ll
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logical-operations.ll
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lshr-shl-differentconstmask.ll
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lt-overflow.ll
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malloc.ll
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max-addops-inline.ll
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max-addrec-size.ll
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max-backedge-taken-count-guard-info-rewrite-expressions.ll
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max-backedge-taken-count-guard-info.ll
[ValueTracking] AllowEphemerals for alignment assumptions. (#108632)
2024-10-03 16:02:34 +01:00
max-backedge-taken-count-limit-by-wrapping.ll
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max-be-count-not-constant.ll
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max-expr-cache.ll
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max-mulops-inline.ll
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max-trip-count-address-space.ll
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max-trip-count.ll
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merge-add-rec-many-inputs.ll
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min-max-exprs.ll
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minmax-intrinsics.ll
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mul.ll
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multiple-max-iterations.ll
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ne-overflow.ll
[SCEV] Add predicate in SolveLinEq to ensure B is a multiple of A. (#108777)
2024-09-28 14:19:57 +01:00
no-follow-alias.ll
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no-wrap-add-exprs.ll
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no-wrap-symbolic-becount.ll
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no-wrap-unknown-becount.ll
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non-IV-phi.ll
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nowrap-preinc-limits.ll
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nsw-offset-assume.ll
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nsw-offset.ll
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nsw.ll
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nw-sub-is-not-nw-add.ll
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outer_phi.ll
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overflow-intrinsics-trip-count.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
overflow-intrinsics.ll
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pointer-rounding.ll
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pointer-select.ll
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pointer-sign-bits.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
pr3909.ll
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pr18606-min-zeros.ll
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pr18606.ll
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pr22179.ll
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pr22641.ll
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pr22674.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
pr22856.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
pr24757.ll
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pr25369.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
pr27315.ll
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pr34538.ll
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pr35890.ll
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pr40420.ll
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pr44605.ll
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pr46786.ll
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pr48225.ll
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pr49856.ll
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pr51869-scalar-evolution-prove-implications-via-truncation.ll
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pr58402-large-number-of-zext-exprs.ll
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pr62380.ll
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pr62430.ll
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pr76234.ll
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pr87798.ll
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pr92560.ll
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predicated-exit-count.ll
[Analysis] Teach isDereferenceableAndAlignedInLoop about SCEV predicates (#106562)
2024-09-23 09:56:37 +01:00
predicated-max-backedge-taken-count-guard-info.ll
[SCEV] Add predicate in SolveLinEq to ensure B is a multiple of A. (#108777)
2024-09-28 14:19:57 +01:00
predicated-symbolic-max-backedge-taken-count.ll
[Analysis] Teach isDereferenceableAndAlignedInLoop about SCEV predicates (#106562)
2024-09-23 09:56:37 +01:00
predicated-trip-count.ll
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ptrtoint-constantexpr-loop.ll
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ptrtoint-global.ll
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ptrtoint.ll
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range_nw_flag.ll
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range-attribute.ll
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range-signedness.ll
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ranges.ll
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returned.ll
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saturating-intrinsics.ll
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scalable-vector.ll
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scev-aa.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
scev-canonical-mode.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
scev-dispositions.ll
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scev-expander-existing-value-offset.ll
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scev-expander-incorrect-nowrap.ll
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scev-expander-reuse-gep.ll
[SCEVExpander] Preserve gep nuw during expansion (#102133)
2024-10-02 11:45:00 +02:00
scev-expander-reuse-unroll.ll
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scev-expander-reuse-vect.ll
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scev-invalid.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
scev-prestart-nowrap.ll
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sdiv.ll
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sext-add-inreg-loop.ll
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sext-add-inreg-unequal.ll
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sext-add-inreg.ll
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sext-inreg.ll
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sext-iv-0.ll
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sext-iv-1.ll
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sext-iv-2.ll
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sext-mul.ll
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sext-to-zext.ll
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sext-zero.ll
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shift-op.ll
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shift-recurrences.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
shl-lshr-differentconstmask.ll
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sle.ll
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smax-br-phi-idioms.ll
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smin-smax-folds.ll
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solve-quadratic-i1.ll
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solve-quadratic-overflow.ll
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solve-quadratic.ll
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SolveQuadraticEquation.ll
Remove br i1 undef from some regression tests [NFC] (#115130)
2024-11-07 08:11:15 +00:00
srem.ll
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strip-injective-zext.ll
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symbolic_max_exit_count.ll
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trip-count2.ll
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trip-count3.ll
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trip-count4.ll
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trip-count5.ll
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trip-count6.ll
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trip-count7.ll
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trip-count8.ll
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trip-count9.ll
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trip-count10.ll
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trip-count11.ll
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trip-count12.ll
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trip-count13.ll
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trip-count14.ll
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trip-count15.ll
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trip-count-andor-selectform.ll
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trip-count-andor.ll
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trip-count-implied-addrec.ll
[Analysis] Teach isDereferenceableAndAlignedInLoop about SCEV predicates (#106562)
2024-09-23 09:56:37 +01:00
trip-count-minmax.ll
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trip-count-negative-stride.ll
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trip-count-non-unit-stride.ll
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trip-count-pow2.ll
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trip-count-scalable-stride.ll
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trip-count-switch.ll
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trip-count-unknown-stride.ll
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trip-count-urem.ll
[SCEV] Add predicate in SolveLinEq to ensure B is a multiple of A. (#108777)
2024-09-28 14:19:57 +01:00
trip-count.ll
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trip-multiple-guard-info.ll
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trip-multiple.ll
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tripmultiple_calculation.ll
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trivial-phis.ll
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trunc-simplify.ll
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truncate.ll
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udiv-of-x-xsmaxone-fold.ll
[SCEV] BECount to zero if ((-C + (C smax %x)) /u %x), C > 0 holds
2024-09-05 17:01:56 +02:00
umin-seq-operand-may-trigger-ub.ll
[SCEV] Retain SCEVSequentialMinMaxExpr if an operand may trigger UB. (#110824)
2024-10-14 13:08:49 +01:00
umin-umax-folds.ll
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undefined.ll
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unknown_phis.ll
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unreachable-code.ll
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unsimplified-loop.ll
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urem-0.ll
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values-at-scopes-consistency.ll
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widenable-condition.ll
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ZeroStep.ll
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zext-divrem.ll
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zext-mul.ll
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zext-signed-addrec.ll
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zext-wrap.ll
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