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llvm-project/llvm/lib/Transforms/Scalar
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Liren Peng 06f06644ef [SeparateConstOffsetFromGEP] Fix: b - a matched a - b during reuniteExts 
During the SeparateConstOffsetFromGEP pass, a - b and b - a will be
considered equivalent in some instances.

An example- the IR contains:

  BB1:
      %add = add %a, 511
      br label %BB2
  BB2:
      %sub2 = sub %b,  %a
      br label %BB3
  BB3:
      %sub1 = sub %add, %b
      %gep = getelementptr float, ptr %p, %sub1

Step 1 in the SeparateConstOffsetFromGEP pass, after split constant index:

  BB1:
      %add = add %a, 511
      br label %BB2
  BB2:
      %sub2 = sub %b,  %a
      br label %BB3
  BB3:
      %sub.t = sub %a, %b
      %gep.base = getelementptr float, ptr %p, %sub.t
      %gep = getelementptr float, ptr %gep.base, 511

Step 2, after reuniteExts:

  BB1:
      br label %BB2
  BB2:
      %sub2 = sub %b,  %a
      br label %BB3
  BB3:
      %gep.base = getelementptr float, ptr %p, %sub2
      %gep = getelementptr float, ptr %gep.base, 511

Obviously, reuniteExts treated a - b and b - a as equivalent.
This patch fixes that.

Reviewed By: nikic, spatel

Differential Revision: https://reviews.llvm.org/D143542
2023-02-15 02:33:31 +00:00
..
ADCE.cpp
[Assignment Tracking][19/*] Account for assignment tracking in ADCE
2022-11-15 13:13:38 +00:00
AlignmentFromAssumptions.cpp
[Transforms] Use std::nullopt instead of None (NFC)
2022-12-02 21:11:37 -08:00
AnnotationRemarks.cpp
[LegacyPM] Remove AnnotationRemarksLegacyPass
2022-12-05 07:51:17 +00:00
BDCE.cpp
Remove a FIXME that will never be fixed since undef is being removed.
2023-01-10 21:06:06 -07:00
CallSiteSplitting.cpp
[Transform] Use range-based for loops (NFC)
2022-08-27 23:54:32 -07:00
CMakeLists.txt
Revert "Remove PlaceSafepoints pass"
2022-10-13 07:17:25 -07:00
ConstantHoisting.cpp
[NFC] Fix "form/from" typos
2023-01-22 20:05:51 +01:00
ConstraintElimination.cpp
[ConstraintElim] Add reproducer remarks.
2023-02-14 15:15:57 +00:00
CorrelatedValuePropagation.cpp
[Scalar] Remove an unused local varable (NFC)
2023-01-29 10:03:15 -08:00
DCE.cpp
…
DeadStoreElimination.cpp
[NFC] PHITransAddr refactoring - return translated value directly or nullptr on
2023-02-03 12:08:45 +03:00
DFAJumpThreading.cpp
[llvm] Use llvm::find (NFC)
2022-10-16 16:21:00 -07:00
DivRemPairs.cpp
Handle simple diamond CFG hoisting in DivRemPairs.
2022-12-28 11:24:18 -07:00
EarlyCSE.cpp
[EarlyCSE] Fix crash when optimizing masked loads/stores
2023-01-12 17:31:36 +00:00
FlattenCFGPass.cpp
…
Float2Int.cpp
[Transforms/Scalar] llvm::Optional => std::optional
2022-12-13 08:05:14 +00:00
GuardWidening.cpp
[GuardWidening] Choose right point for generating wide condition for branches. PR60234. Take 2
2023-01-31 20:08:52 +07:00
GVN.cpp
[NFC] Fix function naming conventions in PHITransAddr methods
2023-02-02 16:38:39 +03:00
GVNHoist.cpp
[Scalar] Qualify auto in range-based for loops (NFC)
2022-08-20 21:18:25 -07:00
GVNSink.cpp
Don't include Optional.h
2022-12-14 21:16:22 -08:00
InductiveRangeCheckElimination.cpp
Move from llvm::makeArrayRef to ArrayRef deduction guides - llvm/ part
2023-01-05 14:11:08 +01:00
IndVarSimplify.cpp
[IndVars] Expand icmp in preheader rather than in loop
2023-01-25 14:41:29 +07:00
InferAddressSpaces.cpp
[DebugInfo][InferAddressSpaces] Propagate DebugLoc when cloning an instruction in InferAddressSpaces
2022-09-29 08:43:37 +00:00
InstSimplifyPass.cpp
…
IVUsersPrinter.cpp
…
JumpThreading.cpp
[DebugInfo] Make debug intrinsics to track cloned values in JumpThreading
2023-02-01 12:52:37 +00:00
LICM.cpp
[LICM] Don't generate crash dialog for missing MSSA
2023-01-23 11:59:32 +01:00
LoopAccessAnalysisPrinter.cpp
[LAA] Change to function analysis for new PM.
2022-10-01 15:44:27 +01:00
LoopBoundSplit.cpp
…
LoopDataPrefetch.cpp
…
LoopDeletion.cpp
[LoopDeletion] Simplify. NFC
2023-02-13 22:49:09 -08:00
LoopDistribute.cpp
[LoopDistribute] Remove legacy pass
2023-02-14 15:51:09 -08:00
LoopFlatten.cpp
[NFC][LoopFlatten][LoopInterchange] Do not explicitly forget subloops
2023-01-12 08:08:11 -08:00
LoopFuse.cpp
Use std::nullopt instead of None in comments (NFC)
2023-01-14 13:53:40 -08:00
LoopIdiomRecognize.cpp
LoopIdiom: avoid patterned memset if constant is not relocatable.
2023-01-12 18:53:07 +00:00
LoopInstSimplify.cpp
[Scalar] Use std::optional in LoopInstSimplify.cpp (NFC)
2022-11-26 17:14:23 -08:00
LoopInterchange.cpp
[LoopInterchange] Correcting the profitability check
2023-01-16 14:36:06 -05:00
LoopLoadElimination.cpp
[LoopLoadElimination] Remove legacy pass
2023-02-14 16:00:49 -08:00
LoopPassManager.cpp
[llvm] Make llvm::Any similar to std::any
2022-12-20 13:28:30 +01:00
LoopPredication.cpp
[llvm][ir] Purge MD_prof custom accessors
2023-01-19 14:26:26 +01:00
LoopRerollPass.cpp
[LoopReroll] Allow for multiple loop control only induction vars
2023-01-12 21:00:35 -08:00
LoopRotation.cpp
[Scalar] Use std::optional in LoopRotation.cpp (NFC)
2022-11-26 17:21:19 -08:00
LoopSimplifyCFG.cpp
[Scalar] Use std::optional in LoopSimplifyCFG.cpp (NFC)
2022-11-26 17:24:20 -08:00
LoopSink.cpp
Move from llvm::makeArrayRef to ArrayRef deduction guides - llvm/ part
2023-01-05 14:11:08 +01:00
LoopStrengthReduce.cpp
[Reland][LSR] Hoist IVInc to loop header if its all uses are in the loop header
2023-02-10 16:52:00 +08:00
LoopUnrollAndJamPass.cpp
[LoopUnrollAndJam] Remove legacy pass
2023-02-14 17:23:15 -08:00
LoopUnrollPass.cpp
[LoopPeel] Expose ValueMap of last peeled iteration. NFC
2022-12-19 09:55:29 -05:00
LoopVersioningLICM.cpp
[AST] Make AliasSetTracker work on BatchAA
2022-12-05 08:12:26 +01:00
LowerAtomicPass.cpp
…
LowerConstantIntrinsics.cpp
[Scalar] Use std::optional in LowerConstantIntrinsics.cpp (NFC)
2022-11-26 17:33:11 -08:00
LowerExpectIntrinsic.cpp
[LowerExpectIntrinsic] Propagate branch weights through phi values when ExpectedValue is unlikely in LowerExpectIntrinsic
2022-12-22 17:33:52 -05:00
LowerGuardIntrinsic.cpp
…
LowerMatrixIntrinsics.cpp
[Matrix] Optimize matrix transposes around additions
2023-01-11 15:21:59 -08:00
LowerWidenableCondition.cpp
…
MakeGuardsExplicit.cpp
…
MemCpyOptimizer.cpp
Deprecate MemIntrinsicBase::getDestAlignment() and MemTransferBase::getSourceAlignment()
2023-01-16 14:22:03 +00:00
MergedLoadStoreMotion.cpp
Reapply [MergeLoadStoreMotion] Don't require GEP for sinking
2022-12-27 12:49:30 +01:00
MergeICmps.cpp
Revert "[MergeICmps] Adapt to non-eq comparisons"
2023-01-12 18:14:47 -08:00
NaryReassociate.cpp
[NFC] Use TypeSize::geFixedValue() instead of TypeSize::getFixedSize()
2023-01-11 16:49:38 +00:00
NewGVN.cpp
Move from llvm::makeArrayRef to ArrayRef deduction guides - llvm/ part
2023-01-05 14:11:08 +01:00
PartiallyInlineLibCalls.cpp
[Scalar] Use std::optional in PartiallyInlineLibCalls.cpp (NFC)
2022-11-26 17:36:26 -08:00
PlaceSafepoints.cpp
Revert "Remove PlaceSafepoints pass"
2022-10-13 07:17:25 -07:00
Reassociate.cpp
[Reassociate] prevent partial undef negation replacement
2022-09-12 12:28:34 -04:00
Reg2Mem.cpp
[reg2mem] Skip non-sized Instructions (PR58890)
2022-11-14 12:47:39 +01:00
RewriteStatepointsForGC.cpp
[RS4GC] Remove the hardcoded GC strategy names (v2)
2023-01-25 20:47:16 +03:00
Scalar.cpp
[LoopUnrollAndJam] Remove legacy pass
2023-02-14 17:23:15 -08:00
ScalarizeMaskedMemIntrin.cpp
[Scalar] Use std::optional in ScalarizeMaskedMemIntrin.cpp (NFC)
2022-11-26 17:39:36 -08:00
Scalarizer.cpp
[Transforms/Scalar] llvm::Optional => std::optional
2022-12-13 08:05:14 +00:00
SCCP.cpp
[SCCPSolver] Move helper functions inside SCCPSolver (NFC).
2023-01-23 17:41:33 +00:00
SeparateConstOffsetFromGEP.cpp
[SeparateConstOffsetFromGEP] Fix: b - a matched a - b during reuniteExts
2023-02-15 02:33:31 +00:00
SimpleLoopUnswitch.cpp
[SimpleLoopUnswitch] Re-enable simple-loop-unswitch-inject-invariant-conditions
2023-02-14 19:54:19 +07:00
SimplifyCFGPass.cpp
[NFC] Rename Instruction::insertAt() to Instruction::insertInto(), to be consistent with BasicBlock::insertInto()
2022-12-15 12:27:45 -08:00
Sink.cpp
[Sink] Process basic blocks with a single successor
2022-11-18 01:23:12 +00:00
SpeculativeExecution.cpp
[CostModel] Replace getUserCost with getInstructionCost
2022-08-18 11:55:23 +01:00
SROA.cpp
[Assignment Tracking] Fix migrateDebuginfo in SROA
2023-02-10 18:10:11 +00:00
StraightLineStrengthReduce.cpp
…
StructurizeCFG.cpp
[StructurizeCFG][DebugInfo] Avoid use-after-free
2022-11-04 13:39:49 +00:00
TailRecursionElimination.cpp
[NFC] Replaces: BB->getInstList().erase(I) with I->eraseFromParent().
2022-12-12 16:22:12 -08:00
TLSVariableHoist.cpp
Reapply [Dominators] Add findNearestCommonDominator() for Instructions (NFC)
2023-01-10 12:16:31 +01:00
WarnMissedTransforms.cpp
Reland [LegacyPM] Remove some legacy passes
2023-02-07 12:56:05 -08:00