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llvm-project/llvm/test/Transforms
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Sanjay Patel 2f6b07316f [InstCombine] fold cast of right-shift if high bits are not demanded 
(masked) trunc (lshr X, C) --> (masked) lshr (trunc X), C

Narrowing the shift should be better for analysis and can lead
to follow-on transforms as shown.

Attempt at a general proof in Alive2:
https://alive2.llvm.org/ce/z/tRnnSF

Here are a couple of the specific tests:
https://alive2.llvm.org/ce/z/bCnTp-
https://alive2.llvm.org/ce/z/TfaHnb

Differential Revision: https://reviews.llvm.org/D110170
2021-09-21 16:09:08 -04:00
..
ADCE
[LICM] Remove AST-based implementation
2021-08-18 20:21:53 +02:00
AddDiscriminators
[NPM] Make AddDiscriminators pass required
2021-09-07 17:02:24 -07:00
AggressiveInstCombine
[AggressiveInstCombine] Add {insert/extract}element to TruncInstCombine DAG
2021-09-16 11:24:31 +03:00
AlignmentFromAssumptions
[AlignFromAssume] Bailout w/non-constant alignments (pr51680)
2021-08-31 09:20:52 -07:00
ArgumentPromotion
[test] Properly match parameter/argument ABI attributes
2021-05-31 09:12:18 -07:00
AtomicExpand
[PowerPC] Add lit.local.cfg in AtomicExpand tests
2021-07-20 09:13:50 +00:00
Attributor
[IR] Look through bitcast in hasFnAttribute()
2021-09-21 21:57:02 +02:00
BDCE
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BlockExtractor
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BranchFolding
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CalledValuePropagation
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CallSiteSplitting
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CanonicalizeAliases
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CanonicalizeFreezeInLoops
[AArch64InstPrinter] Change printAddSubImm to comment imm value when shifted
2021-08-03 02:28:46 -07:00
CodeExtractor
[CodeExtractor] Preserve topological order for the return blocks.
2021-08-25 08:09:01 -07:00
CodeGenPrepare
[CGP] Fix the crash for combining address mode when having cyclic dependency
2021-08-26 22:52:42 +08:00
ConstantHoisting
[RISCV] Add zext.h/zext.w to RISCVTTIImpl::getIntImmCostInst.
2021-08-18 09:40:40 -07:00
ConstantMerge
[ConstantMerge] Don't merge thread_local constants with non-thread_local constants
2021-04-28 23:44:20 +01:00
ConstraintElimination
[ConstraintElimination] Rewrite tests to reduce verification complexity.
2021-08-26 16:41:40 +01:00
Coroutines
[opt] Remove some legacy PM flags
2021-09-13 15:50:03 -07:00
CorrelatedValuePropagation
Recommit "Revert "[CVP] processSwitch: Remove default case when switch cover all possible values.""
2021-09-09 16:53:33 +08:00
CrossDSOCFI
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DCE
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DeadArgElim
[ObjC][ARC] Use the addresses of the ARC runtime functions instead of
2021-09-08 11:58:03 -07:00
DeadStoreElimination
[DSE] Add additional tests to cover review comments.
2021-09-20 17:06:04 +01:00
DFAJumpThreading
Add jump-threading optimization for deterministic finite automata
2021-07-27 14:34:04 -04:00
DivRemPairs
[DivRemPairs] make sure we have a valid CFG for hoisting division
2021-07-28 11:09:12 -04:00
EarlyCSE
[NewPM] Use parameterized syntax for a couple of more passes
2021-08-20 14:59:21 +02:00
EliminateAvailableExternally
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EntryExitInstrumenter
[NewPM] Use parameterized syntax for a couple of more passes
2021-08-20 14:59:21 +02:00
ExpandMemCmp
[x86] split memcmp tests for 32/64-bit targets; NFC
2021-08-15 13:51:18 -04:00
FixIrreducible
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Float2Int
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ForcedFunctionAttrs
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FunctionAttrs
[LLVM IR] Allow volatile stores to trap.
2021-07-26 10:51:00 -07:00
FunctionImport
Revert "[NFC] remove explicit default value for strboolattr attribute in tests"
2021-05-24 19:43:40 +02:00
FunctionSpecialization
[FuncSpec] Specialising on addresses of const global values.
2021-09-17 08:07:05 +01:00
GCOVProfiling
[GCov] Emit memset instead of stores in __llvm_gcov_reset
2021-08-05 22:40:15 -07:00
GlobalDCE
[GlobalDCE] In VFE support for relative pointers, allow GEP references to the base symbol
2021-09-13 15:22:11 -07:00
GlobalMerge
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GlobalOpt
[GlobalOpt] Do not shrink global to bool for an unfavorable AS
2021-09-16 23:13:30 -04:00
GlobalSplit
[test] Fix mix of variable use/def and regex match
2021-03-24 17:58:16 +00:00
GuardWidening
[test] Remove -loop-guard-widening legacy PM tests
2021-09-05 11:36:21 -07:00
GVN
The maximal representable alignment in LLVM IR is 1GiB, not 512MiB
2021-08-26 12:53:39 +03:00
GVNHoist
PR46874: Reset stack after visiting a node
2021-08-20 11:25:05 -07:00
GVNSink
[GVNSink] auto-generate test checks; NFC
2021-04-02 13:16:35 -04:00
HardwareLoops
[HardwareLoops] Loop guard intrinsic to recognise zext
2021-09-16 08:33:16 +01:00
HelloNew
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HotColdSplit
[CodeExtractor] Preserve topological order for the return blocks.
2021-08-25 08:09:01 -07:00
IndirectBrExpand
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IndVarSimplify
[SCEV] Generalize implication when signedness of FoundPred doesn't matter
2021-09-21 11:17:56 +07:00
InferAddressSpaces
[Tests] Fix incorrect noalias metadata
2021-09-18 20:51:00 +02:00
InferFunctionAttrs
Replace "CHECK-NOT: #{{.*}}" with same-line positive checks. NFC.
2021-08-05 21:55:23 -07:00
Inline
[ObjC][ARC] Use the addresses of the ARC runtime functions instead of
2021-09-08 11:58:03 -07:00
InstCombine
[InstCombine] fold cast of right-shift if high bits are not demanded
2021-09-21 16:09:08 -04:00
InstMerge
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InstNamer
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InstSimplify
[Analysis] Add support for vscale in computeKnownBitsFromOperator
2021-09-20 15:01:59 +01:00
InterleavedAccess
[InterleaveAccess] Copy fast math flags when adjusting binary operators in interleave access pass
2021-06-17 09:53:33 +01:00
Internalize
[IR] Rename comdat noduplicates to comdat nodeduplicate
2021-07-20 12:47:10 -07:00
IRCE
[SCEV] By more careful when traversing phis in isImpliedViaMerge.
2021-05-07 19:52:29 +01:00
IROutliner
[IROutliner] Adding supports for multiple exits
2021-09-08 08:58:07 -07:00
JumpThreading
[tests] Stablize tests for possible change in deref semantics
2021-07-14 13:05:43 -07:00
LCSSA
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LICM
[test] Fixup tests with -analyze in llvm/test/Transforms
2021-09-04 16:45:51 -07:00
LoadStoreVectorizer
[OpaquePtr] Forbid mixing typed and opaque pointers
2021-09-10 15:18:23 +02:00
LoopBoundSplit
[LoopBoundSplit] Check the start value of split cond AddRec
2021-09-13 10:32:35 +01:00
LoopDataPrefetch
[LoopDataPrefetch] Add missed LoopSimplify dependence for prefetch pass
2021-08-26 21:01:59 +08:00
LoopDeletion
[test] Fixup tests with -analyze in llvm/test/Transforms
2021-09-04 16:45:51 -07:00
LoopDistribute
Recommit "[LAA] Support pointer phis in loop by analyzing each incoming pointer."
2021-09-14 11:19:12 +01:00
LoopFlatten
[LoopFlatten] Make the analysis more robust after IV widening
2021-09-10 12:34:04 +01:00
LoopFusion
[llvm] Unbreak no-asserts testing after 18839be9c5c8b9f882dd241769784035b082d4e1
2021-04-27 05:46:43 -04:00
LoopIdiom
[LoopIdiomRecognize][Remarks] Track loop-strided store to/from blocks
2021-09-16 15:46:26 -07:00
LoopInstSimplify
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LoopInterchange
[LoopInterchange] Check lcssa phis in the inner latch in scenarios of multi-level nested loops
2021-07-16 11:59:20 -04:00
LoopLoadElim
[IndVars] Provide eliminateIVComparison with context
2021-03-19 12:28:22 +07:00
LoopPredication
Update LoopPredication test to fix buildbot failure.
2021-09-16 23:37:59 +00:00
LoopReroll
[SCEV] Fix unsound reasoning in howManyLessThans
2021-07-15 10:32:47 -07:00
LoopRotate
[Tests] Remove explicit -enable-mssa-loop-dependency options (NFC)
2021-08-14 21:21:07 +02:00
LoopSimplify
[test] Fixup tests with -analyze in llvm/test/Transforms
2021-09-04 16:45:51 -07:00
LoopSimplifyCFG
[Tests] Remove explicit -enable-mssa-loop-dependency options (NFC)
2021-08-14 21:21:07 +02:00
LoopStrengthReduce
[LSR] Make sure that Factor fits into Base type
2021-09-21 20:50:50 +03:00
LoopTransformWarning
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LoopUnroll
[SimplifyCFG] performBranchToCommonDestFolding(): require block-closed SSA form for bonus instructions (PR51125)
2021-09-09 12:28:09 +03:00
LoopUnrollAndJam
[LoopUnrollAndJam] Change LoopUnrollAndJamPass to LoopNest pass
2021-06-08 20:30:02 +09:00
LoopUnswitch
[Tests] Remove explicit -enable-mssa-loop-dependency options (NFC)
2021-08-14 21:21:07 +02:00
LoopVectorize
[LV] Fix crash for reverse interleaved loads with gap under fold-tail.
2021-09-21 20:13:32 +03:00
LoopVersioning
[SCEVExpander] Simplify pointer overflow check
2021-09-02 20:15:59 +02:00
LoopVersioningLICM
[LICM] Remove AST-based implementation
2021-08-18 20:21:53 +02:00
LowerAtomic
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LowerConstantIntrinsics
[LowerConstantIntrinsics] Fix heap-use-after-free bug in worklist
2021-09-21 11:33:07 +02:00
LowerExpectIntrinsic
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LowerGuardIntrinsic
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LowerInvoke
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LowerMatrixIntrinsics
[Tests] Fix incorrect noalias metadata
2021-09-18 20:51:00 +02:00
LowerSwitch
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LowerTypeTests
[ConstantFold] Get rid of special cases for sizeof etc.
2021-07-31 13:20:47 -07:00
LowerWidenableCondition
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MakeGuardsExplicit
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Mem2Reg
[Mem2Reg] Regenerate test checks (NFC)
2021-06-21 11:06:28 +02:00
MemCpyOpt
[OpaquePtr] Forbid mixing typed and opaque pointers
2021-09-10 15:18:23 +02:00
MergeFunc
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MergeICmps
[MergeICmps] Don't reorder unmerged comparisons
2021-09-21 21:22:12 +02:00
MetaRenamer
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NameAnonGlobals
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NaryReassociate
[NARY] Don't optimize min/max if there are side uses (part2)
2021-04-30 19:02:02 +07:00
NewGVN
[MemorySSA] Support invariant.group metadata
2021-09-08 13:06:12 -07:00
ObjCARC
[ObjC][ARC] Use the addresses of the ARC runtime functions instead of
2021-09-08 11:58:03 -07:00
OpenMP
[Attributor] Change AAExecutionDomain to check intrinsic edges
2021-09-17 19:51:38 -04:00
PartialInlining
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PartiallyInlineLibCalls
[PartiallyInlineLibCalls] Disable sqrt expansion for strictfp.
2021-06-17 14:15:12 -07:00
PGOProfile
[InstrProfiling] Keep profd non-private for non-renamable comdat functions
2021-08-24 20:14:03 -07:00
PhaseOrdering
[SimplifyCFG] Add bonus when seeing vector ops to branch fold to common dest
2021-09-16 10:50:36 -07:00
PlaceSafepoints
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PreISelIntrinsicLowering
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PruneEH
[NewPM] Consistently use 'simplifycfg' rather than 'simplify-cfg'
2021-07-09 09:47:03 +02:00
Reassociate
Partial Reapply "[DebugInfo] Use variadic debug values to salvage BinOps and GEP instrs with non-const operands"
2021-06-24 09:46:38 +01:00
Reg2Mem
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RelLookupTableConverter/X86
[Passes] Add relative lookup table converter pass
2021-04-13 01:29:41 +00:00
RewriteStatepointsForGC
[Tests] Fix incorrect noalias metadata
2021-09-18 20:51:00 +02:00
SafeStack
[SafeStack] Use proper API to get stack guard
2021-05-30 00:52:48 -07:00
SampleProfile
[CSSPGO] Tweakes to lower pseudo probe runtime overhead
2021-09-17 12:28:09 -07:00
ScalarizeMaskedMemIntrin
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Scalarizer
Update @llvm.powi to handle different int sizes for the exponent
2021-06-17 09:38:28 +02:00
SCCP
[ObjC][ARC] Use the addresses of the ARC runtime functions instead of
2021-09-08 11:58:03 -07:00
SeparateConstOffsetFromGEP
SeparateConstOffsetFromGEP: Fix stack overflow in unreachable code
2021-09-14 19:49:38 -04:00
SimpleLoopUnswitch
[SimpleLoopUnswitch] Inform pass manager when child loops are deleted
2021-09-04 17:54:39 +02:00
SimplifyCFG
[SimplifyCFG] Redirect switch cases that lead to UB into an unreachable block
2021-09-21 10:45:19 +07:00
Sink
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SLPVectorizer
[InstCombine] Improve TryToSinkInstruction with multiple uses
2021-09-21 10:04:04 -04:00
SpeculativeExecution
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SROA
[IR] Add helper to convert offset to GEP indices
2021-09-20 20:18:16 +02:00
StraightLineStrengthReduce
Revert "[NFC] remove explicit default value for strboolattr attribute in tests"
2021-05-24 19:43:40 +02:00
StripDeadPrototypes
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StripSymbols
[DebugInfo] Support for signed constants inside DIExpression
2021-03-30 23:20:38 +05:30
StructurizeCFG
Revert "[NFC] remove explicit default value for strboolattr attribute in tests"
2021-05-24 19:43:40 +02:00
SyntheticCountsPropagation
…
TailCallElim
[ObjC][ARC] Use the addresses of the ARC runtime functions instead of
2021-09-08 11:58:03 -07:00
ThinLTOBitcodeWriter
ThinLTO: Fix inline assembly references to static functions with CFI
2021-08-03 11:35:30 -07:00
TypePromotion/ARM
[ARM][TypePromotion] Re-generate test checks. NFC
2021-08-16 13:42:42 -07:00
UnifyFunctionExitNodes
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UnifyLoopExits
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Util
[test] Fixup tests with -analyze in llvm/test/Transforms
2021-09-04 16:45:51 -07:00
VectorCombine
[ValueTracking,VectorCombine] Allow passing DT to computeConstantRange.
2021-09-21 16:54:47 +01:00
WholeProgramDevirt
[OpaquePtr] Support forward references in textual IR
2021-06-29 20:10:31 +02:00