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clang-p2996/llvm/test/Transforms/SimplifyCFG
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Nikita Popov 2b089e9ae0 [SimplifyCFG] Try to merge edge block when threading (PR55765) 
When threading, we always create a new block for the threaded edge
(even if the edge is not critical), which will later get folded back
into the predecessor if possible. Depending on precise processing
order, this separate block may break the detection of trivial
cycles in the threading code, which normally avoids infinite
threading of loops. Explicitly merge the created edge block into
the predecessor to avoid this.

Fixes https://github.com/llvm/llvm-project/issues/55765.

Differential Revision: https://reviews.llvm.org/D127216
2022-06-20 10:29:33 +02:00
..
AArch64
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AMDGPU
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ARM
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
Hexagon
[SimplifyCFG] SwitchToLookupTable(): don't increase ret count
2021-07-26 23:29:55 +03:00
Mips
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PowerPC
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RISCV
[SimplifyCFG] Enable switch to lookup table for more types.
2021-08-03 15:35:16 -07:00
SPARC
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X86
[IR] Enable opaque pointers by default
2022-06-02 09:40:56 +02:00
1elt-ptr-vec-alignment-crash.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
2002-05-21-PHIElimination.ll
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2002-09-24-PHIAssertion.ll
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2003-03-07-DominateProblem.ll
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2003-08-05-InvokeCrash.ll
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2003-08-17-BranchFold.ll
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2003-08-17-BranchFoldOrdering.ll
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2003-08-17-FoldSwitch-dbg.ll
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2003-08-17-FoldSwitch.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
2004-12-10-SimplifyCFGCrash.ll
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2005-06-16-PHICrash.ll
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2005-08-01-PHIUpdateFail.ll
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2005-10-02-InvokeSimplify.ll
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2005-12-03-IncorrectPHIFold.ll
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2006-02-17-InfiniteUnroll.ll
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2006-06-12-InfLoop.ll
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2006-08-03-Crash.ll
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2006-10-19-UncondDiv.ll
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2006-12-08-Ptr-ICmp-Branch.ll
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2007-11-22-InvokeNoUnwind.ll
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2007-12-21-Crash.ll
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2008-01-02-hoist-fp-add.ll
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2008-05-16-PHIBlockMerge.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
2008-07-13-InfLoopMiscompile.ll
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2008-09-08-MultiplePred.ll
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2008-09-17-SpeculativeHoist.ll
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2008-10-03-SpeculativelyExecuteBeforePHI.ll
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2008-12-06-SingleEntryPhi.ll
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2008-12-16-DCECond.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
2009-01-18-PHIPropCrash.ll
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2009-05-12-externweak.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
2011-03-08-UnreachableUse.ll
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2011-09-05-TrivialLPad.ll
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annotations.ll
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assume.ll
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attr-convergent.ll
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attr-noduplicate.ll
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basictest.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
bbi-23595.ll
Revert "[SimplifyCFG] Start redesigning FoldTwoEntryPHINode()."
2022-02-03 12:32:50 +03:00
branch-cond-merge.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
branch-cond-prop.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
branch-fold-dbg.ll
[Test] Regenerate checks using auto-update script
2021-10-28 15:13:43 +07:00
branch-fold-test.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
branch-fold-three.ll
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branch-fold-threshold.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
branch-fold.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
branch-phi-thread.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
BrUnwind.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
callbr-destinations.ll
[llvm][test] rewrite callbr to use i rather than X constraint NFC
2022-01-11 11:31:08 -08:00
change-to-unreachable-matching-successor.ll
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clamp.ll
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cleanup-phis.ll
[SimplifyCFG] Use make_early_inc_range() while deleting instructions
2021-05-26 11:43:11 -07:00
common-code-hoisting.ll
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common-dest-folding.ll
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commondest-loopid.ll
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ConditionalTrappingConstantExpr.ll
[IR] Check for SignedMin/-1 division in canTrap() (PR56038)
2022-06-17 11:25:11 +02:00
constantexprs.ll
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convergent.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
dbginfo.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
dce-cond-after-folding-terminator.ll
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DeadSetCC.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
debug-info-thread-phi.ll
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div-rem-pairs.ll
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drop-debug-loc-when-speculating.ll
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duplicate-landingpad.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
duplicate-phis.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
empty-catchpad.ll
[NFC][SimplifyCFG] Autogenerate checklines in a few tests
2021-07-02 22:35:24 +03:00
EmptyBlockMerge.ll
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EqualPHIEdgeBlockMerge.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
extract-cost.ll
[SimplifyCFG] SimplifyCondBranchToTwoReturns(): really only deal with different ret blocks
2021-07-23 00:36:59 +03:00
fold-branch-to-common-dest-free-cost.ll
[SimplifyCFG] Ignore free instructions when computing cost for folding branch to common dest
2021-09-22 09:52:37 -07:00
fold-branch-to-common-dest-two-preds-cost.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
fold-branch-to-common-dest.ll
[SimplifyCFG] FoldBranchToCommonDest(): allow branch-on-select
2022-03-25 16:12:17 +03:00
fold-debug-info.ll
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fold-debug-location.ll
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fold-two-entry-phi-node-with-one-block-profmd.ll
[SimplifyCFG] Don't speculatively execute BB[s] if they are predictably not taken
2021-07-26 02:55:15 +03:00
fold-two-entry-phi-node-with-two-blocks-profmd.ll
[SimplifyCFG] Don't speculatively execute BB[s] if they are predictably not taken
2021-07-26 02:55:15 +03:00
FoldValueComparisonIntoPredecessors-domtree-preservation-edgecase-2.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
FoldValueComparisonIntoPredecessors-domtree-preservation-edgecase.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
FoldValueComparisonIntoPredecessors-no-new-successors.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
ForwardSwitchConditionToPHI.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
gepcost.ll
[SimplifyCFG,EarlyCSE] Update 2 tests to not branch on undef (NFC).
2022-06-12 18:03:26 +01:00
guards.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
hoist-common-code.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
hoist-dbgvalue-inlined.ll
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hoist-dbgvalue.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
hoist-from-addresstaken-block.ll
[SimplifyCFG] FoldTwoEntryPHINode(): don't fold if either block has it's address taken
2021-06-20 12:37:14 +03:00
hoist-with-range.ll
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HoistCode.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
implied-and-or.ll
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implied-cond-matching-false-dest.ll
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implied-cond-matching-imm.ll
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implied-cond-matching.ll
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implied-cond.ll
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indirectbr.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
InfLoop.ll
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inline-asm-sink.ll
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invoke_unwind_lifetime.ll
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invoke_unwind.ll
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invoke.ll
[Local] Don't remove invoke of non-willreturn function
2022-05-30 15:37:46 +02:00
iterative-simplify.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
jump-threading.ll
[SimplifyCFG] Replace condition value when threading
2022-04-29 09:50:27 +02:00
lifetime-landingpad.ll
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lifetime.ll
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merge-cond-stores-2.ll
Revert "[SimplifyCFG] Start redesigning FoldTwoEntryPHINode()."
2022-02-03 12:32:50 +03:00
merge-cond-stores.ll
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merge-default.ll
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merge-deopt-bundle-constants.ll
[Test] Add test demonstating how deopt bundle constants may be merged into instruction
2022-02-15 20:28:41 +07:00
merge-duplicate-conditional-ret-val.ll
[SimplifyCFG] Drop support for duplicating ret's into uncond predecessors
2021-07-26 23:29:21 +03:00
merge-empty-return-blocks.ll
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multiple-phis.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
no_speculative_loads_with_asan.ll
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no_speculative_loads_with_tsan.ll
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no-md-sink.ll
Revert "[SimplifyCFG] Start redesigning FoldTwoEntryPHINode()."
2022-02-03 12:32:50 +03:00
nomerge.ll
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noreturn-call.ll
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opaque-ptr.ll
[SimplifyCFG][OpaquePtr] Check store type when merging conditional store
2022-02-20 11:29:54 -08:00
opt-for-fuzzing.ll
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phi-to-select-constexpr-icmp.ll
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phi-undef-loadstore.ll
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PhiBlockMerge2.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
PhiBlockMerge.ll
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PhiEliminate2.ll
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PhiEliminate3.ll
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PhiEliminate.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
PHINode.ll
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PhiNoEliminate.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
poison-merge.ll
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pr33605.ll
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pr34131.ll
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pr35774.ll
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pr39807.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
pr46638.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
pr48641.ll
[NFC] Added testcase for PR48641
2021-09-04 10:44:39 +02:00
pr48778-sdiv-speculation.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
pr50060-constantfold-loopid.ll
Revert "[NFC] remove explicit default value for strboolattr attribute in tests"
2021-05-24 19:43:40 +02:00
pr52290.ll
[Test] Add test for PR52290
2021-10-25 18:25:59 +07:00
pr55765.ll
[SimplifyCFG] Try to merge edge block when threading (PR55765)
2022-06-20 10:29:33 +02:00
PR9946.ll
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PR16069.ll
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PR17073.ll
[SimplifyCFG] SimplifyCondBranchToTwoReturns(): really only deal with different ret blocks
2021-07-23 00:36:59 +03:00
PR25267.ll
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PR27615-simplify-cond-br.ll
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preserve-branchweights-partial.ll
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preserve-branchweights-switch-create.ll
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preserve-branchweights.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
preserve-llvm-loop-metadata.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
preserve-load-metadata-2.ll
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preserve-load-metadata-3.ll
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preserve-load-metadata.ll
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preserve-make-implicit-on-switch-to-br.ll
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preserve-store-alignment.ll
Revert "[SimplifyCFG] Start redesigning FoldTwoEntryPHINode()."
2022-02-03 12:32:50 +03:00
rangereduce.ll
[IR] Enable opaque pointers by default
2022-06-02 09:40:56 +02:00
return-merge.ll
[SimplifyCFG] Drop support for duplicating ret's into uncond predecessors
2021-07-26 23:29:21 +03:00
safe-abs.ll
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seh-nounwind.ll
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select-gep.ll
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signbit-like-value-extension.ll
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SimplifyEqualityComparisonWithOnlyPredecessor-domtree-preservation-edgecase.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
SimplifyTerminatorOnSelect-domtree-preservation-edgecase.ll
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simplifyUnreachable-degenerate-conditional-branch-with-matching-destinations.ll
[SimplifyCFG] simplifyUnreachable(): erase instructions iff they are guaranteed to transfer execution to unreachable
2021-07-03 10:45:44 +03:00
sink-inf-loop.ll
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speculate-call.ll
Strip undef implying attributes when moving calls
2021-07-27 10:57:05 -04:00
speculate-dbgvalue.ll
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speculate-math.ll
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speculate-store-opaque-pointer.ll
[OpaquePtr] Forbid mixing typed and opaque pointers
2021-09-10 15:18:23 +02:00
speculate-store.ll
[OpaquePtr] Forbid mixing typed and opaque pointers
2021-09-10 15:18:23 +02:00
speculate-vector-ops-inseltpoison.ll
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speculate-vector-ops.ll
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speculate-with-offset.ll
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speculatively-execute-block-profmd.ll
[SimplifyCFG] Don't speculatively execute BB if it's predictably not taken
2021-07-26 02:55:14 +03:00
statepoint-invoke-unwind.ll
[Statepoint] Update gc.statepoint calls in tests with elementtype (NFC)
2022-02-04 14:15:41 +01:00
suppress-zero-branch-weights.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
switch_create-custom-dl.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
switch_create.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
switch_msan.ll
[SimplifyCFG] Fix SimplifyBranchOnICmpChain to be undef/poison safe.
2021-07-13 15:35:18 +09:00
switch_switch_fold.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
switch_thread.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
switch_ub.ll
[SimplifyCFG] Redirect switch cases that lead to UB into an unreachable block
2021-09-21 10:45:19 +07:00
switch_undef.ll
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
switch-dead-default.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
switch-masked-bits.ll
[NFCI-ish][SimplifyCFGPass] Rework and generalize ret block tail-merging
2021-06-23 14:33:18 +03:00
switch-on-const-select.ll
[SimplifyCFG] Tail-merging all blocks with ret terminator
2021-06-24 13:15:39 +03:00
switch-profmd.ll
…
switch-range-to-icmp.ll
Prevent crash when TurnSwitchRangeIntoICmp receives default unreachable destination
2022-06-16 16:11:24 +02:00
switch-simplify-crash.ll
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switch-to-br.ll
…
switch-to-icmp.ll
[SimplifyCFG][PhaseOrdering] Defer lowering switch into an integer range comparison and branch until after at least the IPSCCP
2022-02-17 12:13:55 +03:00
switch-to-select-multiple-edge-per-block-phi.ll
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switch-to-select-two-case.ll
[SimplifyCFG] Try to fold switch with single result value and power-of-2 cases to mask+select
2022-04-15 00:10:00 +08:00
switchToSelect-domtree-preservation-edgecase.ll
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tail-merge-assert.ll
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tail-merge-noreturn.ll
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tail-merge-resume.ll
[SimplifyCFG] Tail-merging all blocks with resume terminator
2021-06-24 21:25:06 +03:00
tautological-conditional-branch.ll
[SimplifyCFG] Preserve knowledge about guarding condition by adding assume
2021-09-08 14:05:17 +07:00
trap-debugloc.ll
[Local] Do not introduce a new llvm.trap before unreachable
2021-07-26 23:33:36 -05:00
trap-no-null-opt-debugloc.ll
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trapping-load-unreachable.ll
[Local] Do not introduce a new llvm.trap before unreachable
2021-07-26 23:33:36 -05:00
two-entry-phi-fold-crash.ll
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two-entry-phi-node.ll
[SimplifyCFG] FoldTwoEntryPHINode(): bailout on inverted logical and/or (PR51149)
2021-07-22 22:19:34 +03:00
two-entry-phi-return.ll
[SimplifyCFG] avoid crash on degenerate loop
2021-06-11 09:37:06 -04:00
UncondBranchToHeader.ll
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UncondBranchToReturn.ll
[NFC][SimplifyCFG] Fix tests to use FileCheck instead of grep
2021-06-21 23:56:54 +03:00
undef_phi.ll
[Test] Add test showing missing simplifycfg opportunity for Phi with undef inputs
2021-10-28 11:23:07 +07:00
unprofitable-pr.ll
[CodeMetrics] Don't require speculatability for ephemeral values
2021-10-21 20:30:01 +02:00
unreachable_assume.ll
…
unreachable-cleanuppad.ll
…
unreachable-matching-successor.ll
…
unreachable-selfloop.ll
…
UnreachableEliminate.ll
Revert "[SimplifyCFG] Start redesigning FoldTwoEntryPHINode()."
2022-02-03 12:32:50 +03:00
unsigned-multiplication-will-overflow.ll
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volatile-phioper.ll
…
wc-widen-block.ll
[SimplifyCFG] Thread branches on same condition in more cases (PR54980)
2022-04-29 09:44:05 +02:00
wineh-unreachable.ll
[NFC][SimplifyCFG] Autogenerate checklines in a few tests
2021-07-02 22:35:24 +03:00