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Juneyoung Lee 6ad63606ea [CodeGenPrepare] Freeze condition when transforming select to br 
Summary:
This is a simple fix for CodeGenPrepare that freezes branch condition when transforming select to branch.
If it is not frozen, instsimplify or the later pipeline can potentially exploit undefined behavior.

The diff shows optimized form becase D75859 and D76048 already made a few changes to CodeGenPrepare for optimizing freeze(cmp).

Reviewers: jdoerfert, spatel, lebedev.ri, efriedma

Reviewed By: lebedev.ri

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76179
 		2020-03-16 12:46:20 +09:00
..
ADCE Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351 2019-12-24 15:57:33 -08:00
AddDiscriminators Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
AggressiveInstCombine [AggressiveInstCombine] Add test with baseline CHECKs for aggressive inst combine for ICmp instruction. 2020-02-12 15:09:38 +02:00
AlignmentFromAssumptions
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ArgumentPromotion [ArgPromo][Tests] Run update_test_checks on all ArgumentPromotion tests 2019-12-14 00:29:38 -06:00
AtomicExpand AMDGPU: Fix copy-pasted test name error 2019-12-11 19:44:47 +05:30
Attributor [Attributor] Detect possibly unbounded cycles in functions 2020-03-13 11:17:33 -05:00
BDCE Clang-trunk Generates Wrong Debug values with -O1 2019-11-21 13:53:10 -08:00
BlockExtractor Revert "Revert "Reland "[Support] make report_fatal_error `abort` instead of `exit`""" 2020-02-13 10:16:06 -08:00
BranchFolding
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CallSiteSplitting
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CalledValuePropagation
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CanonicalizeAliases
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CodeExtractor [LoopExtractor] Convert LoopExtractor from LoopPass to ModulePass 2020-02-09 12:25:21 +02:00
CodeGenPrepare [CodeGenPrepare] Freeze condition when transforming select to br 2020-03-16 12:46:20 +09:00
ConstProp [ConstProp] Add test for bitcast to gep fold; NFC 2020-03-04 18:27:20 +01:00
ConstantHoisting Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
ConstantMerge
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Coroutines [Coroutines] Optimized coroutine elision based on reachability 2020-03-05 14:43:50 +08:00
CorrelatedValuePropagation [ValueLattice] Add singlecrfromundef lattice value. 2020-03-15 11:23:46 +00:00
CrossDSOCFI
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DCE [BasicBlockUtils] Add utility to remove redundant dbg.value instrs 2019-12-16 11:41:21 +01:00
DeadArgElim [NFC] Fix trivial typos in comments 2020-01-06 10:50:26 +00:00
DeadStoreElimination Fix DSE miscompile when store is clobbered across loop iterations 2020-02-27 14:43:01 -08:00
DivRemPairs
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EarlyCSE Let EarlyCSE fold equivalent freeze instructions 2020-02-28 20:35:20 +09:00
EliminateAvailableExternally
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EntryExitInstrumenter
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ExpandMemCmp [ExpandMemCmp] Properly constant-fold all compares. 2020-03-09 10:40:52 +01:00
Float2Int
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ForcedFunctionAttrs
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FunctionAttrs [Attributor] Copy or port test cases related to Attributor to` Attributor` test folder 2019-12-02 15:36:29 +00:00
FunctionImport Revert "Revert "Reland "[Support] make report_fatal_error `abort` instead of `exit`""" 2020-02-13 10:16:06 -08:00
GCOVProfiling Revert "Revert "Reland "[Support] make report_fatal_error `abort` instead of `exit`""" 2020-02-13 10:16:06 -08:00
GVN [GVN] Fold equivalent freeze instructions 2020-03-01 07:32:05 +09:00
GVNHoist Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
GVNSink
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GlobalDCE [WPD/VFE] Always emit vcall_visibility metadata for -fwhole-program-vtables 2020-01-23 11:36:01 -08:00
GlobalMerge
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GlobalOpt [Transforms][GlobalSRA] huge array causes long compilation time and huge memory usage. 2020-01-04 16:42:38 +03:00
GlobalSplit [WPD/VFE] Always emit vcall_visibility metadata for -fwhole-program-vtables 2020-01-23 11:36:01 -08:00
GuardWidening Broaden the definition of a "widenable branch" 2019-11-21 10:46:16 -08:00
HardwareLoops Recommit "[HardwareLoops] Optimisation remarks" 2019-11-05 09:06:22 +00:00
HotColdSplit [HotColdSplit] Mark entire function cold when entry block is cold 2020-02-17 15:57:50 -08:00
IPConstantProp [SCCP] Do not mark unknown loads as overdefined. 2020-02-20 22:48:58 +01:00
IRCE [IRCE] Use SCEVExpander to modify loop bound 2020-02-06 12:44:43 +03:00
IndVarSimplify [IndVarSimplify] Extend previous special case for load use instruction to any narrow type loop variant to avoid extra trunc instruction 2020-03-05 16:27:59 -05:00
IndirectBrExpand
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InferAddressSpaces
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InferFunctionAttrs [Attributor] Copy or port test cases related to Attributor to` Attributor` test folder 2019-12-02 15:36:29 +00:00
Inline [AssumeBundles] filter usefull attriutes to preserve 2020-03-13 17:35:47 +01:00
InstCombine [InstCombine] reduce demand-limited bool math to logic 2020-03-11 15:45:58 -04:00
InstMerge
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InstNamer
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InstSimplify [SVE] Update API ConstantVector::getSplat() to use ElementCount. 2020-03-12 13:22:41 -07:00
InterleavedAccess [ARM] Disable VLD4 under MVE 2019-12-08 10:37:29 +00:00
Internalize Reland: Dead Virtual Function Elimination 2019-10-17 09:58:57 +00:00
JumpThreading [ValueLattice] Add new state for undef constants. 2020-03-14 17:19:59 +00:00
LCSSA [SSAUpdater] Don't call ValueIsRAUWd upon single use replacement 2020-01-23 15:53:53 +07:00
LICM [LICM] Allow freeze to hoist/sink out of a loop 2020-03-03 12:29:39 +09:00
LoadStoreVectorizer AMDGPU: Don't report 2-byte alignment as fast 2020-02-11 18:35:00 -05:00
LoopDataPrefetch
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LoopDeletion
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LoopDistribute
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LoopFusion [LoopFusion] Move instructions from FC1.GuardBlock to FC0.GuardBlock and 2020-01-30 18:02:22 +00:00
LoopIdiom Revert BCmp Loop Idiom recognition transform (PR43870) 2019-11-02 12:48:03 +03:00
LoopInstSimplify
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LoopInterchange [LoopInterchange] Fix interchanging contents of preheader BBs 2020-03-13 15:59:37 -04:00
LoopLoadElim
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LoopPredication [BasicBlock] fix looping in getPostdominatingDeoptimizeCall 2020-01-17 15:40:02 +03:00
LoopReroll Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351 2019-12-24 15:57:33 -08:00
LoopRotate [Test] Add a regression test for failure introduced by 952ad4701c 2020-03-05 16:32:37 +07:00
LoopSimplify [LoopSimplify] Regenerate test checks; NFC 2020-01-11 11:02:24 +01:00
LoopSimplifyCFG
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LoopStrengthReduce Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
LoopTransformWarning
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LoopUnroll [LoopPeel] Turn incorrect assert into a check 2020-03-12 17:23:07 +07:00
LoopUnrollAndJam [llvm] Make new pass manager's OptimizationLevel a class 2020-01-16 09:00:56 -08:00
LoopUnswitch
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LoopVectorize [InstComine] Forego of one-use check in `(X - (X & Y)) --> (X & ~Y)` if Y is a constant 2020-03-06 21:39:07 +03:00
LoopVersioning
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LoopVersioningLICM
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LowerAtomic
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LowerConstantIntrinsics
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LowerExpectIntrinsic
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LowerGuardIntrinsic
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LowerInvoke
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LowerMatrixIntrinsics [Matrix] Add remark propagation along the inlined-at chain. 2020-03-11 17:40:08 +00:00
LowerSwitch
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LowerTypeTests
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LowerWidenableCondition
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MakeGuardsExplicit
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Mem2Reg
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MemCpyOpt [Transform][MemCpyOpt] Add missing DebugLoc to %tmpbitcast 2020-02-28 15:20:51 +00:00
MergeFunc [NewPM] Port MergeFunctions pass 2020-01-14 20:55:41 +01:00
MergeICmps Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
MetaRenamer
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NameAnonGlobals
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NaryReassociate
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NewGVN Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
ObjCARC [ObjC][ARC] Don't remove autoreleaseRV/retainRV pairs if the call isn't 2020-03-13 13:52:14 -07:00
OpenMP [OpenMP][Opt][NFC] Add test case for known runtime function attributes 2020-03-13 00:28:14 -05:00
PGOProfile [PGO] Attach appropriate funclet operand bundles to value profiling instrumentation calls 2020-01-24 11:20:53 -08:00
PartiallyInlineLibCalls
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PhaseOrdering [InstComine] Forego of one-use check in `(X - (X & Y)) --> (X & ~Y)` if Y is a constant 2020-03-06 21:39:07 +03:00
PlaceSafepoints
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PreISelIntrinsicLowering [ObjC] Override TailCallKind when lowering objc intrinsics 2019-11-11 08:30:06 -08:00
PruneEH
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Reassociate Remove BinaryOperator::CreateFNeg 2020-02-27 09:06:03 -08:00
Reg2Mem
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RewriteStatepointsForGC [RS4GC] Handle uses of extractelement for conversion from vector to scalar base 2020-03-06 16:28:49 -05:00
SCCP [ValueLattice] Add new state for undef constants. 2020-03-14 17:19:59 +00:00
SLPVectorizer [SLPVectorizer][SVE] Bail out early for scalable vector. 2020-03-13 11:23:31 -07:00
SROA SROA: Don't drop atomic load/store alignments (PR45010) 2020-02-28 10:38:40 +01:00
SafeStack Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
SampleProfile Fix test for profile remapper 2020-02-18 17:58:32 -08:00
ScalarizeMaskedMemIntrin/X86
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Scalarizer Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
SeparateConstOffsetFromGEP [SeparateConstOffsetFromGEP] Fix: sext(a) + sext(b) -> sext(a + b) matches add and sub instructions with one another 2020-01-17 12:22:52 -05:00
SimpleLoopUnswitch Revert "[SimpleLoopUnswitch] Fix introduction of UB when hoisted condition may be undef or poison" 2020-02-28 11:10:46 +09:00
SimplifyCFG [SimplifyCFG] add test for chain of empty block conditional branches; NFC 2020-03-13 14:39:31 -04:00
Sink
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SpeculateAroundPHIs
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SpeculativeExecution
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StraightLineStrengthReduce Migrate function attribute "no-frame-pointer-elim"="false" to "frame-pointer"="none" as cleanups after D56351 2019-12-24 16:27:51 -08:00
StripDeadPrototypes
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StripSymbols
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StructurizeCFG StructurizeCFG: simplify phi nodes when possible 2020-03-05 10:33:15 +05:30
SyntheticCountsPropagation
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TailCallElim
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ThinLTOBitcodeWriter ThinLTOBitcodeWriter: drop dso_local when a GlobalVariable is converted to a declaration 2020-03-05 18:09:33 -08:00
TypePromotion/ARM Revert "[ARM][TypePromotion] Enable by default" 2019-12-22 11:27:11 -08:00
Util Fixed [AssumeBundles] Move to IR so it can be used by Analysis 2020-03-10 18:02:39 +01:00
VectorCombine/X86 [VectorCombine] fold extract-extract-op with different extraction indexes 2020-03-08 09:57:55 -04:00
WholeProgramDevirt [WPD] Provide a way to prevent functions from being devirtualized 2020-03-09 14:05:15 +03:00