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f47d325eec
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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
..
ADT Add missing header 2014-11-19 08:12:55 +00:00
Analysis AliasSetTracker: UnknownInsts should contribute to the refcount 2014-11-19 09:41:05 +00:00
AsmParser Pass a MemoryBufferRef when we can avoid taking ownership. 2014-08-26 21:49:01 +00:00
Bitcode Revert commits r222146 and r222137. 2014-11-17 19:26:40 +00:00
CodeGen Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
Config Expose LLVM version string via macro in llvm-config.h, and modify Go bindings 2014-11-19 03:34:17 +00:00
DebugInfo Reapply "[dwarfdump] Add support for dumping accelerator tables." 2014-11-14 16:15:53 +00:00
ExecutionEngine [MCJIT] Turn the getSymbolAddress free function created in r218626 into a static 2014-10-01 04:11:13 +00:00
IR IR: Sink MDNode::Hash down to GenericMDNode::Hash 2014-11-18 02:20:29 +00:00
IRReader Pass a MemoryBufferRef when we can avoid taking ownership. 2014-08-26 21:49:01 +00:00
LineEditor [C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API. 2014-04-21 09:34:48 +00:00
Linker Factor common code it Linker::init. 2014-11-17 20:51:01 +00:00
LTO Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
MC Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
Object llvm-readobj: teach it how to dump COFF base relocation table 2014-11-19 00:18:07 +00:00
Option Add an overload of getLastArgNoClaim taking two OptSpecifiers. 2014-09-12 19:42:53 +00:00
ProfileData llvm-cov: Sink some reporting logic into CoverageMapping 2014-11-14 01:50:32 +00:00
Support Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
TableGen Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
Target Move register class name strings to a single array in MCRegisterInfo to reduce static table size and number of relocation entries. 2014-11-17 05:50:14 +00:00
Transforms [SeparateConstOffsetFromGEP] Allow SeparateConstOffsetFromGEP pass to lower GEPs. 2014-11-19 06:24:44 +00:00
CMakeLists.txt Remove llvm_headers_do_not_build for the benefit of XCode and Visual Studio users. 2014-08-14 00:51:47 +00:00
InitializePasses.h Add back r222061 with a fix. 2014-11-17 02:28:27 +00:00
LinkAllIR.h [cleanup] Move the Dominators.h and Verifier.h headers into the IR 2014-01-13 09:26:24 +00:00
LinkAllPasses.h Add back r222061 with a fix. 2014-11-17 02:28:27 +00:00
module.modulemap [modules] Stop excluding Support/Debug.h from the Support module. This header 2014-10-13 00:41:03 +00:00
module.modulemap.build [modules] Add module maps for LLVM. These are not quite ready for prime-time 2014-05-21 02:46:14 +00:00
Pass.h Revert "[PM] Add pass run listeners to the pass manager." 2014-05-15 17:49:20 +00:00
PassAnalysisSupport.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
PassInfo.h Remove pimpl class from PassRegistry. 2014-06-12 16:06:51 +00:00
PassManager.h Move the old pass manager infrastructure into a legacy namespace and 2013-11-09 12:26:54 +00:00
PassRegistry.h [PM] Remove an unused and rather expensive mapping from an analysis 2014-10-06 00:30:59 +00:00
PassSupport.h Defining a new API for debug options that doesn't rely on static global cl::opts. 2014-10-15 21:54:35 +00:00