Yingwei Zheng 2071ea24a2 [LVI] Skip self loops in solveBlockValueNonLocal (#127763) ...

We cannot infer more information from backedges in
`solveBlockValueNonLocal`. However, since DT is unavailable in LVI,
there is not a precise way to check whether a BB edge is a backedge.
This patch only skips self loops to unblock the range analysis.

The motivating case is extracted from
https://github.com/llvm/llvm-project/pull/127663.

Compile-time impact is high:
https://llvm-compile-time-tracker.com/compare.php?from=84ddda58c870681dd12ed765e9d59d5e00567f94&to=af032f1351358f2f5b5d9f4e87c5601c23b9bd37&stat=instructions:u

2025-02-23 17:52:38 +08:00

..

2008-11-27-EntryMunge.ll

…

2010-08-26-and.ll

…

2011-04-02-SimplifyDeadBlock.ll

…

2011-04-14-InfLoop.ll

…

2012-07-19-NoSuccessorIndirectBr.ll

…

aa-crash-phi-no-args.ll

…

and-and-cond.ll

…

and-cond.ll

…

assume-edge-dom.ll

…

assume.ll

…

basic.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

bb-unreachable-from-entry.ll

JumpThreading: Convert tests to -passes

2022-11-27 11:19:28 -05:00

branch-debug-info2.ll

…

branch-debug-info.ll

…

branch-no-const.ll

…

callbr-edge-split.ll

…

callbr.ll

[IR] Treat callbr as special terminator (PR64215)

2023-08-25 09:20:18 +02:00

codesize-loop.ll

…

combine-metadata.ll

JumpThreading: Convert tests to -passes

2022-11-27 11:19:28 -05:00

compare.ll

JumpThreading: Modernize some test checking

2022-11-27 12:41:28 -05:00

conservative-lvi.ll

…

constant-fold-status.ll

Reapply [IR] Avoid creating icmp/fcmp constant expressions (#92885)

2024-05-31 08:55:59 +02:00

crash.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

ddt-crash2.ll

…

ddt-crash3.ll

…

ddt-crash4.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

ddt-crash.ll

[LVI] Skip self loops in solveBlockValueNonLocal (#127763)

2025-02-23 17:52:38 +08:00

degenerate-phi.ll

…

divergent-target-test.ll

…

domtree-updates.ll

…

fold-not-thread.ll

…

free_instructions.ll

Fix typos (#88565)

2024-04-12 14:33:35 -07:00

freeze-impliescond.ll

…

freeze-lvi-edgevaluelocal.ll

…

freeze.ll

JumpThreading: Convert tests to -passes

2022-11-27 11:19:28 -05:00

guard-split-debuginfo.ll

[RemoveDIs] Print IR with debug records by default (#91724)

2024-06-14 15:07:27 +01:00

guards.ll

…

header-succ.ll

…

implied-cond.ll

…

indirectbr-cast-int-op.ll

…

indirectbr-in-predpred.ll

…

indirectbr.ll

…

induction.ll

…

insert-placeholder-to-prevent-infinite-recursion.ll

…

invalidate-lvi.ll

…

is_constant.ll

…

landing-pad.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

loop-phi.ll

…

lvi-load.ll

…

lvi-tristate.ll

…

ne-undef.ll

…

no-irreducible-loops.ll

…

noalias-scope-decl.ll

…

nonnull-gep-out-of-bounds.ll

…

or-undef.ll

…

phi-copy-to-pred.ll

…

phi-eq.ll

…

phi-known.ll

[ValueTracking] Use predicates for incoming phi-edges to deduce non-zero

2023-08-22 10:59:02 -05:00

phi-xor-branch.ll

…

pr9331.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

pr15851_hang.ll

…

pr22086.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

pr27840.ll

…

pr33605.ll

…

pr33917.ll

…

pr36133.ll

…

pr40992-indirectbr-folding.ll

…

pr43276.ll

…

pr62908.ll

…

pr63013.ll

…

pr70651.ll

…

pr79175.ll

…

PR33357-lvi-recursion.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

PR37745.ll

…

PR44611-across-header-hang.ll

…

pre-load.ll

…

preserving-debugloc-bitcast.ll

…

preserving-debugloc-br.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

preserving-debugloc-fold-select.ll

…

range-compare.ll

…

redundant-dbg-info.ll

[RemoveDIs] Print IR with debug records by default (#91724)

2024-06-14 15:07:27 +01:00

removed-use.ll

…

select-unfold-msan.ll

…

select.ll

…

simplify-fcmp-inst-no-context-literal-nan.ll

…

stale-loop-info-after-unfold-select.ll

…

static-profile.ll

…

thread-cmp.ll

…

thread-debug-info.ll

Move RemoveRedundantDbgInstrs outside of inner loop in JumpThreading (#123008)

2025-01-21 20:17:49 -05:00

thread-loads.ll

[Local] Only intersect alias.scope,noalias & parallel_loop if inst moves (#117716)

2024-11-26 20:39:53 +00:00

thread-prob-1.ll

JumpThreading: Convert tests to -passes

2022-11-27 11:19:28 -05:00

thread-prob-2.ll

…

thread-prob-3.ll

…

thread-prob-4.ll

…

thread-prob-5.ll

…

thread-prob-6.ll

[JT][CT] Preserve exisiting BPI/BFI during JumpThreading

2023-02-16 16:08:34 +07:00

thread-prob-7.ll

…

thread-two-bbs-cuda.ll

…

thread-two-bbs-msvc.ll

…

thread-two-bbs-threshold.ll

…

thread-two-bbs.ll

…

threadable-edge-cast.ll

…

threading_prof1.ll

…

threading_prof2.ll

…

threading_prof3.ll

…

unreachable-loops.ll

[llvm] Remove br i1 undef from some regression tests [NFC] (#116739)

2024-11-19 08:12:25 +00:00

update-edge-weight.ll

BlockFrequencyInfoImpl: Avoid big numbers, increase precision for small spreads

2023-10-24 20:27:39 -07:00