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David Majnemer f47d325eec AliasSetTracker: UnknownInsts should contribute to the refcount 
AliasSetTracker::addUnknown may create an AliasSet devoid of pointers
just to contain an instruction if no suitable AliasSet already exists.
It will then AliasSet::addUnknownInst and we will be done.

However, it's possible for addUnknown to choose an existing AliasSet to
addUnknownInst.
If this were to occur, we are in a bit of a pickle: removing pointers
from the AliasSet can cause the entire AliasSet to become destroyed,
taking our unknown instructions out with them.

Instead, keep track whether or not our AliasSet has any unknown
instructions.

This fixes PR21582.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222338 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-19 09:41:05 +00:00
..
AliasAnalysis.h Make AAMDNodes ctor and operator bool (!!!) explicit, mop up bugs and weirdness exposed by it. 2014-10-04 22:44:29 +00:00
AliasSetTracker.h AliasSetTracker: UnknownInsts should contribute to the refcount 2014-11-19 09:41:05 +00:00
AssumptionTracker.h AssumptionTracker: Don't create temporary CallbackVHs. 2014-10-11 19:13:01 +00:00
BlockFrequencyInfo.h blockfreq: Remove unnecessary template parameters 2014-04-11 23:21:02 +00:00
BlockFrequencyInfoImpl.h Fix typo in comment 2014-10-08 23:30:45 +00:00
BranchProbabilityInfo.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
CallGraph.h Fix GraphTraits for "const CallGraphNode *" and "const CallGraph *" 2014-11-17 17:51:45 +00:00
CallGraphSCCPass.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 07:30:04 +00:00
CallPrinter.h Added -view-callgraph module pass. 2013-01-11 17:28:14 +00:00
CaptureTracking.h Match semantics of PointerMayBeCapturedBefore to its name by default 2014-07-21 21:30:22 +00:00
CFG.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
CFGPrinter.h Tweak CFGPrinter to wrap very long names. 2014-08-20 17:38:12 +00:00
CGSCCPassManager.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
CodeMetrics.h Add functions for finding ephemeral values 2014-09-07 13:49:57 +00:00
ConstantFolding.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
ConstantsScanner.h [Modules] Move InstIterator out of the Support library, where it had no 2014-03-04 10:30:26 +00:00
DependenceAnalysis.h [DependenceAnalysis] Allow subscripts of different types 2014-11-16 16:52:44 +00:00
DominanceFrontier.h These functions are not actually defined for NDEBUG or !LLVM_DUMP_ENABLED, so guarding the declarations as well. NFC, silences MSVC warnings in release builds. 2014-10-24 15:16:39 +00:00
DominanceFrontierImpl.h Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
DomPrinter.h
DOTGraphTraitsPass.h Modernize raw_fd_ostream's constructor a bit. 2014-08-25 18:16:47 +00:00
FindUsedTypes.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 07:30:04 +00:00
FunctionTargetTransformInfo.h Add a new pass FunctionTargetTransformInfo. This pass serves as a 2014-09-18 00:34:14 +00:00
InlineCost.h Add functions for finding ephemeral values 2014-09-07 13:49:57 +00:00
InstructionSimplify.h Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.) 2014-09-07 18:57:58 +00:00
Interval.h Remove copy ctors that did the same thing as the default one. 2014-03-11 11:32:49 +00:00
IntervalIterator.h Reduce double set lookups. NFC. 2014-10-10 15:32:50 +00:00
IntervalPartition.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
IVUsers.h Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size. 2014-08-21 05:55:13 +00:00
JumpInstrTableInfo.h Add Forward Control-Flow Integrity. 2014-11-11 21:08:02 +00:00
LazyCallGraph.h Fix typos in comments, NFC 2014-08-29 21:53:01 +00:00
LazyValueInfo.h Make use of @llvm.assume from LazyValueInfo 2014-09-07 20:29:59 +00:00
LibCallAliasAnalysis.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
LibCallSemantics.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
Lint.h
Loads.h AA metadata refactoring (introduce AAMDNodes) 2014-07-24 12:16:19 +00:00
LoopInfo.h Add optimization remarks to the loop unroller and vectorizer. 2014-04-29 14:27:31 +00:00
LoopInfoImpl.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LoopIterator.h Remove unneeded #includes. 2013-02-09 13:29:10 +00:00
LoopPass.h Fix assertion in LICM doFinalization() 2014-09-24 16:48:31 +00:00
MemoryBuiltins.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
MemoryDependenceAnalysis.h Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.) 2014-09-07 18:57:58 +00:00
Passes.h Add back r222061 with a fix. 2014-11-17 02:28:27 +00:00
PHITransAddr.h Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.) 2014-09-07 18:57:58 +00:00
PostDominators.h Fix typos in comments, NFC 2014-08-29 21:53:01 +00:00
PtrUseVisitor.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
RegionInfo.h These functions are not actually defined for NDEBUG or !LLVM_DUMP_ENABLED, so guarding the declarations as well. NFC, silences MSVC warnings in release builds. 2014-10-24 15:16:39 +00:00
RegionInfoImpl.h Header hygiene: remove using directive and #undef DEBUG_TYPE once we're done. 2014-07-30 00:25:24 +00:00
RegionIterator.h Templatify RegionInfo so it works on MachineBasicBlocks 2014-07-19 18:29:29 +00:00
RegionPass.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-05 07:30:04 +00:00
RegionPrinter.h
ScalarEvolution.h [ScalarEvolution] Guard dump() with #if 2014-10-27 21:14:41 +00:00
ScalarEvolutionExpander.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
ScalarEvolutionExpressions.h Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
ScalarEvolutionNormalization.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
SparsePropagation.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 04:59:12 +00:00
TargetFolder.h Add CreatePointerBitCastOrAddrSpaceCast to IRBuilder and co. 2014-07-14 17:24:35 +00:00
TargetTransformInfo.h Add a new pass FunctionTargetTransformInfo. This pass serves as a 2014-09-18 00:34:14 +00:00
Trace.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
ValueTracking.h Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.) 2014-09-07 18:57:58 +00:00