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616011418e
llvm-6502/include/llvm/Analysis
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Andrew Trick 616011418e Fix ScalarEvolution::ComputeExitLimitFromCond for 'or' conditions. 
Fixes PR16130 - clang produces incorrect code with loop/expression at -O2.

This is a 2+ year old bug that's now holding up the release. It's a
case where we knowingly made aggressive assumptions about undefined
behavior. These assumptions are wrong when SCEV is computing a
subexpression that does not directly control the branch. With this
fix, we avoid making assumptions in those cases but still optimize the
common case. SCEV's trip count computation for exits controlled by
'or' expressions is now analagous to the trip count computation for
loops with multiple exits. I had already fixed the multiple exit case
to be conservative.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182989 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-31 06:43:25 +00:00
..
AliasAnalysis.h Make BasicAliasAnalysis recognize the fact a noalias argument cannot alias another argument, even if the other argument is not itself marked noalias. 2013-05-28 08:17:48 +00:00
AliasSetTracker.h Remove unneeded #includes. 2013-03-18 23:33:44 +00:00
BlockFrequencyImpl.h Add std prefixes to fix the build with xlc. 2013-03-20 21:00:22 +00:00
BlockFrequencyInfo.h
BranchProbabilityInfo.h Add a new function attribute 'cold' to functions. 2013-05-24 12:26:52 +00:00
CallGraph.h Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
CallGraphSCCPass.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
CallPrinter.h Added -view-callgraph module pass. 2013-01-11 17:28:14 +00:00
CaptureTracking.h Remove unneeded #includes. Use forward declarations instead. 2013-03-10 00:34:01 +00:00
CFGPrinter.h Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
CodeMetrics.h Switch CodeMetrics itself over to use TTI to determine if an instruction 2013-01-21 13:04:33 +00:00
ConstantFolding.h Add missing -*- C++ -*- to headers 2013-05-17 21:43:39 +00:00
ConstantsScanner.h
DependenceAnalysis.h Fix a few typos in comments. 2013-03-05 22:05:16 +00:00
DominanceFrontier.h
DominatorInternals.h
Dominators.h Add some constantness. 2013-03-05 22:01:15 +00:00
DomPrinter.h
DOTGraphTraitsPass.h Remove redundant 'llvm::' qualifications 2013-01-13 16:01:15 +00:00
FindUsedTypes.h
InlineCost.h Use only explicit bool conversion operators 2013-05-15 07:36:59 +00:00
InstructionSimplify.h Document another instsimplify assumption. 2013-01-31 22:13:00 +00:00
Interval.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
IntervalIterator.h Fix a few typos in comments. 2013-03-05 22:05:16 +00:00
IntervalPartition.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
IVUsers.h Remove duplicated forward declaration. 2013-03-06 00:04:32 +00:00
LazyValueInfo.h
LibCallAliasAnalysis.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
LibCallSemantics.h
Lint.h
Loads.h Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
LoopInfo.h Add support for llvm.vectorizer metadata 2013-05-28 20:00:34 +00:00
LoopInfoImpl.h Remove #includes from the commonly used LoopInfo.h. 2013-02-09 01:04:28 +00:00
LoopIterator.h Remove unneeded #includes. 2013-02-09 13:29:10 +00:00
LoopPass.h LoopPass.h doesn't require Function.h. Remove unneeded #include. 2013-01-11 01:03:32 +00:00
MemoryBuiltins.h Revert r176408 and r176407 to address PR15540. 2013-04-09 18:16:05 +00:00
MemoryDependenceAnalysis.h Memory Dependence Analysis (not mem-dep test) take advantage of "invariant.load" metadata. 2013-03-06 17:48:48 +00:00
Passes.h Remove -print-dbginfo as it is unused & bitrotten. 2013-03-08 18:17:46 +00:00
PathNumbering.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
PathProfileInfo.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
PHITransAddr.h Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
PostDominators.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
ProfileDataLoader.h
ProfileDataTypes.h
ProfileInfo.h
ProfileInfoLoader.h
ProfileInfoTypes.h
PtrUseVisitor.h Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
RegionInfo.h RegionInfo: Add helpers to replace entry/exit recursively 2013-04-10 06:54:49 +00:00
RegionIterator.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
RegionPass.h Fix a typo (ouput => output) 2013-05-17 12:31:43 +00:00
RegionPrinter.h
ScalarEvolution.h Fix ScalarEvolution::ComputeExitLimitFromCond for 'or' conditions. 2013-05-31 06:43:25 +00:00
ScalarEvolutionExpander.h SCEVExpander fix. RAUW needs to update the InsertedExpressions cache. 2013-01-14 21:00:37 +00:00
ScalarEvolutionExpressions.h Pacify -Wnon-virtual-dtor 2013-02-15 23:51:59 +00:00
ScalarEvolutionNormalization.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
SparsePropagation.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
TargetTransformInfo.h CostModel: Add parameter to instruction cost to further classify operand values 2013-04-04 23:26:21 +00:00
Trace.h Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
ValueTracking.h Move isKnownNonNull out of AliasAnalysis.h and into ValueTracking.cpp since 2013-01-31 02:40:59 +00:00
Verifier.h