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llvm-project/llvm/lib/Transforms/Utils
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Max Kazantsev 3dc6e53c97 [LoopPeel] Turn incorrect assert into a check 
Summary:
This patch replaces incorrectt assert with a check. Previously it asserts that
if SCEV cannot prove `isKnownPredicate(A != B)`, then it should be able to prove
`isKnownPredicate(A == B)`.

Both these fact may be not provable. It is shown in the provided test:

Could not prove: `{-294,+,-2}<%bb1> !=  0`
Asserting: `{-294,+,-2}<%bb1> == 0`

Obviously, this SCEV is not equal to zero, but 0 is in its range so we cannot
also prove that it is not zero.

Instead of assert, we should be checking the required conditions explicitly.

Reviewers: lebedev.ri, fhahn, sanjoy, fedor.sergeev
Reviewed By: lebedev.ri
Subscribers: hiraditya, zzheng, javed.absar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76050
 		2020-03-12 17:23:07 +07:00
..
AMDGPUEmitPrintf.cpp Fix unused variable warning. NFCI. 2020-01-16 13:02:40 +00:00
ASanStackFrameLayout.cpp
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AddDiscriminators.cpp [NFC] Fix trivial typos in comments 2020-01-06 10:50:26 +00:00
BasicBlockUtils.cpp [CodeGenPrepare] Handle ExtractValueInst in dupRetToEnableTailCallOpts 2020-03-04 11:10:32 -08:00
BreakCriticalEdges.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
BuildLibCalls.cpp [SimplifyLibcalls] Don't replace locked IO (fgetc/fgets/fputc/fputs/fread/fwrite) with unlocked IO (*_unlocked) 2020-03-10 11:11:58 -07:00
BypassSlowDivision.cpp [BypassSlowDivision][CodeGenPrepare] avoid crashing on unused code (PR43514) 2019-10-01 21:25:36 +00:00
CMakeLists.txt Fixed [AssumeBundles] Move to IR so it can be used by Analysis 2020-03-10 18:02:39 +01:00
CallGraphUpdater.cpp [Attributor] Derive memory location attributes (argmemonly, ...) 2020-02-14 19:05:51 -06:00
CallPromotionUtils.cpp [CallPromotionUtils] Add missing promotion legality check to tryPromoteCall. 2020-02-28 09:35:09 -08:00
CanonicalizeAliases.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
CloneFunction.cpp [CloneFunction] Update loop headers after cloning all blocks in loop. 2020-02-21 22:18:24 +00:00
CloneModule.cpp Fix for "DICompileUnit not listed in llvm.dbg.cu" verification error after ... 2019-08-28 21:27:50 +00:00
CodeExtractor.cpp [NFC] Try fix ubsan buildbot after 876d133789 2020-03-03 17:53:02 +01:00
CodeMoverUtils.cpp Fix MSVC lamdba default capture mode warning. NFCI. 2020-01-29 15:47:04 +00:00
CtorUtils.cpp
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Debugify.cpp [Transforms][Debugify] Ignore PHI nodes when checking for DebugLocs 2020-02-27 16:14:11 +00:00
DemoteRegToStack.cpp
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EntryExitInstrumenter.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
EscapeEnumerator.cpp
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Evaluator.cpp [ConstantFolding] Always return something from ConstantFoldConstant 2020-03-04 18:24:47 +01:00
FlattenCFG.cpp Handle successor's PHI node correctly when flattening CFG merges two if-regions 2019-09-26 15:20:17 +00:00
FunctionComparator.cpp IR: compare type attributes deeply when looking into functions. 2019-06-27 11:44:45 +00:00
FunctionImportUtils.cpp [ThinLTO] Fix importing of writeonly variables in distributed ThinLTO 2019-12-04 14:59:27 -08:00
GlobalStatus.cpp
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GuardUtils.cpp Further cleanup manipulation of widenable branches [NFC] 2019-11-21 15:07:30 -08:00
ImportedFunctionsInliningStatistics.cpp [Instruction] Add hasMetadata(Kind) helper [NFC] 2019-09-04 17:28:48 +00:00
InjectTLIMappings.cpp [VectorUtils] Move ToVectorTy to VectorUtils.h (NFC). 2020-02-21 17:31:24 +00:00
InlineFunction.cpp [Local] Do not move around dbg.declares during replaceDbgDeclare 2020-02-13 14:35:02 -08:00
InstructionNamer.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
IntegerDivision.cpp
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LCSSA.cpp [LCSSA] Don't use VH callbacks to invalidate SCEV when creating LCSSA phis 2019-12-06 13:21:49 +07:00
LLVMBuild.txt
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LibCallsShrinkWrap.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
Local.cpp [Coroutines] Use dbg.declare for frame variables 2020-03-03 17:13:46 -05:00
LoopRotationUtils.cpp [LoopRotate] add ability to repeat loop rotation until non-deoptimizing exit is found 2020-01-23 15:56:24 +03:00
LoopSimplify.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
LoopUnroll.cpp [NFC][SCEV] Piping to pass TTI into SCEVExpander::isHighCostExpansionHelper() 2020-02-25 23:05:56 +03:00
LoopUnrollAndJam.cpp [NFC][SCEV] Piping to pass TTI into SCEVExpander::isHighCostExpansionHelper() 2020-02-25 23:05:56 +03:00
LoopUnrollPeel.cpp [LoopPeel] Turn incorrect assert into a check 2020-03-12 17:23:07 +07:00
LoopUnrollRuntime.cpp [NFC][SCEV] Piping to pass new SCEVCheapExpansionBudget option into SCEVExpander::isHighCostExpansionHelper() 2020-02-25 23:05:57 +03:00
LoopUtils.cpp [LoopVectorizer] Add reduction tests for inloop reductions. NFC 2020-03-03 10:54:00 +00:00
LoopVersioning.cpp Revert "[SCEV] Move ScalarEvolutionExpander.cpp to Transforms/Utils (NFC)." 2020-01-04 18:44:38 +00:00
LowerInvoke.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
LowerMemIntrinsics.cpp
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LowerSwitch.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
Mem2Reg.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
MetaRenamer.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
MisExpect.cpp Add missing includes needed to prune LLVMContext.h include, NFC 2019-11-14 15:23:15 -08:00
ModuleUtils.cpp [llvm][VectorUtils] Tweak VFShape for scalable vector functions. 2020-01-30 05:53:56 +00:00
NameAnonGlobals.cpp Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
PredicateInfo.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
PromoteMemoryToRegister.cpp
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SSAUpdater.cpp Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
SSAUpdaterBulk.cpp
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SanitizerStats.cpp
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SimplifyCFG.cpp Re-revert: Recover debug intrinsics when killing duplicated/empty blocks 2020-02-13 11:48:19 +00:00
SimplifyIndVar.cpp [NFC][SCEV] Piping to pass new SCEVCheapExpansionBudget option into SCEVExpander::isHighCostExpansionHelper() 2020-02-25 23:05:57 +03:00
SimplifyLibCalls.cpp [SimplifyLibcalls] Don't replace locked IO (fgetc/fgets/fputc/fputs/fread/fwrite) with unlocked IO (*_unlocked) 2020-03-10 11:11:58 -07:00
SizeOpts.cpp [PGO][PGSO] Use IsColdXNthPercentile for sample PGO. 2020-03-05 09:54:54 -08:00
SplitModule.cpp
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StripGCRelocates.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
StripNonLineTableDebugInfo.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
SymbolRewriter.cpp Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
UnifyFunctionExitNodes.cpp Sink all InitializePasses.h includes 2019-11-13 16:34:37 -08:00
Utils.cpp [SVFS] Inject TLI Mappings in VFABI attribute. 2019-11-15 18:42:56 +00:00
VNCoercion.cpp [ConstantFolding] Always return something from ConstantFoldConstant 2020-03-04 18:24:47 +01:00
ValueMapper.cpp [ValueMapper] NFC: Remove dead code to pause metadata mapping 2019-08-28 17:43:14 +00:00