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llvm-project/llvm/lib/Transforms/Scalar
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Max Kazantsev f80ffa1a78 [IRCE] Fix corner case with Start = INT_MAX 
When iterating through loop

  for (int i = INT_MAX; i > 0; i--)

We fail to generate the pre-loop for it. It happens because we use the
overflown value in a comparison predicate when identifying whether or not
we need it.

In old logic, we used SLE predicate against Greatest value which exceeds all
seen values of the IV and might be overflown. Now we use the GreatestSeen
value of this IV with SLT predicate.

Also added a test that ensures that a pre-loop is generated for such loops.

Differential Revision: https://reviews.llvm.org/D35347

llvm-svn: 308001
 		2017-07-14 06:35:03 +00:00
..
ADCE.cpp [ADCE] Remove redundent code [NFC] 2017-03-16 03:59:23 +00:00
AlignmentFromAssumptions.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
BDCE.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
CMakeLists.txt Remove the LoadCombine pass. It was never enabled and is unsupported. 2017-06-22 22:58:12 +00:00
ConstantHoisting.cpp [ConstantHoisting] Remove dupliate logic in constant hoisting 2017-07-10 20:45:34 +00:00
ConstantProp.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
CorrelatedValuePropagation.cpp [CorrelatedValuePropagation] Fix typo in comment sense->since. NFC 2017-06-23 20:28:40 +00:00
DCE.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
DeadStoreElimination.cpp Cleanup in preparation for D30703. NFCI 2017-03-29 14:42:27 +00:00
EarlyCSE.cpp [Constants] If we already have a ConstantInt*, prefer to use isZero/isOne/isMinusOne instead of isNullValue/isOneValue/isAllOnesValue inherited from Constant. NFCI 2017-07-06 18:39:47 +00:00
FlattenCFGPass.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
Float2Int.cpp [Float2Int] Replace a ConstantRange copy with a move. Remove an extra call to MapVector::find. 2017-05-05 17:09:29 +00:00
GVN.cpp Enhance synchscope representation 2017-07-11 22:23:00 +00:00
GVNHoist.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
GVNSink.cpp Hide dbgs() stream for when built with -fmodules. 2017-06-14 19:16:22 +00:00
GuardWidening.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
IVUsersPrinter.cpp [PM] Separate the LoopAnalysisManager from the LoopPassManager and move 2017-01-11 09:43:56 +00:00
IndVarSimplify.cpp [IndVars] Add an option to be able to disable LFTR 2017-06-09 06:11:59 +00:00
InductiveRangeCheckElimination.cpp [IRCE] Fix corner case with Start = INT_MAX 2017-07-14 06:35:03 +00:00
InferAddressSpaces.cpp [InferAddressSpaces] Fix assertion about null pointer 2017-07-07 02:40:13 +00:00
JumpThreading.cpp Enhance synchscope representation 2017-07-11 22:23:00 +00:00
LICM.cpp [IR] Prefer use_empty() to !hasNUsesOrMore(1) for clarity. 2017-05-16 22:38:40 +00:00
LLVMBuild.txt
…
LoopAccessAnalysisPrinter.cpp [PM] Separate the LoopAnalysisManager from the LoopPassManager and move 2017-01-11 09:43:56 +00:00
LoopDataPrefetch.cpp Revert @llvm.assume with operator bundles (r289755-r289757) 2016-12-19 08:22:17 +00:00
LoopDeletion.cpp [LoopDeletion] NFC: Add loop being analyzed debug statement 2017-07-04 17:00:03 +00:00
LoopDistribute.cpp Add a wrapper around copy_if in STLExtras; NFC 2017-02-21 00:38:44 +00:00
LoopIdiomRecognize.cpp [Constants] If we already have a ConstantInt*, prefer to use isZero/isOne/isMinusOne instead of isNullValue/isOneValue/isAllOnesValue inherited from Constant. NFCI 2017-07-06 18:39:47 +00:00
LoopInstSimplify.cpp Kill off the old SimplifyInstruction API by converting remaining users. 2017-04-28 19:55:38 +00:00
LoopInterchange.cpp [LoopInterchange] Add more debug messages to currentLimitations(). 2017-07-03 15:32:00 +00:00
LoopLoadElimination.cpp Add a getPointerOperandType() helper to LoadInst and StoreInst; NFC 2017-04-18 22:00:54 +00:00
LoopPassManager.cpp [PM] Teach LoopUnroll to update the LPM infrastructure as it unrolls 2017-01-25 02:49:01 +00:00
LoopPredication.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
LoopRerollPass.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
LoopRotation.cpp [LoopRotate] Fix DomTree update logic for unreachable nodes. Fix PR33701. 2017-07-12 18:42:16 +00:00
LoopSimplifyCFG.cpp Rename WeakVH to WeakTrackingVH; NFC 2017-05-01 17:07:49 +00:00
LoopSink.cpp [PM] Port LoopSink to the new pass manager. 2017-01-20 08:42:19 +00:00
LoopStrengthReduce.cpp [Constants] If we already have a ConstantInt*, prefer to use isZero/isOne/isMinusOne instead of isNullValue/isOneValue/isAllOnesValue inherited from Constant. NFCI 2017-07-06 18:39:47 +00:00
LoopUnrollPass.cpp [LoopUnroll] Fix bug in computeUnrollCount causing it to not honor MaxCount 2017-06-28 17:01:15 +00:00
LoopUnswitch.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
LoopVersioningLICM.cpp [LoopVersioning] Require loop-simplify form for loop versioning. 2016-12-19 17:13:37 +00:00
LowerAtomic.cpp [PM] Remove support for omitting the AnalysisManager argument to new 2016-06-17 00:11:01 +00:00
LowerExpectIntrinsic.cpp Fix builin_expect lowering bug 2017-06-07 18:32:24 +00:00
LowerGuardIntrinsic.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
MemCpyOptimizer.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
MergedLoadStoreMotion.cpp [IR] Make use of Type::isPtrOrPtrVectorTy/isIntOrIntVectorTy/isFPOrFPVectorTy to shorten code. NFC 2017-07-09 07:04:00 +00:00
NaryReassociate.cpp Rename WeakVH to WeakTrackingVH; NFC 2017-05-01 17:07:49 +00:00
NewGVN.cpp [NewGVN] Check for congruency of memory accesses. 2017-07-11 19:49:12 +00:00
PartiallyInlineLibCalls.cpp Rename AttributeSet to AttributeList 2017-03-21 16:57:19 +00:00
PlaceSafepoints.cpp Apply clang-tidy's modernize-loop-convert to most of lib/Transforms. 2016-06-26 12:28:59 +00:00
Reassociate.cpp [Constants] If we already have a ConstantInt*, prefer to use isZero/isOne/isMinusOne instead of isNullValue/isOneValue/isAllOnesValue inherited from Constant. NFCI 2017-07-06 18:39:47 +00:00
Reg2Mem.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
RewriteStatepointsForGC.cpp fix trivial typos; NFC 2017-07-02 03:24:54 +00:00
SCCP.cpp [Constants] If we already have a ConstantInt*, prefer to use isZero/isOne/isMinusOne instead of isNullValue/isOneValue/isAllOnesValue inherited from Constant. NFCI 2017-07-06 18:39:47 +00:00
SROA.cpp Enhance synchscope representation 2017-07-11 22:23:00 +00:00
Scalar.cpp Remove the LoadCombine pass. It was never enabled and is unsupported. 2017-06-22 22:58:12 +00:00
Scalarizer.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
SeparateConstOffsetFromGEP.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
SimpleLoopUnswitch.cpp Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
SimplifyCFGPass.cpp Split the SimplifyCFG pass into two variants. 2017-03-26 06:44:08 +00:00
Sink.cpp [Sink] Fix predicate in legality check 2017-06-09 19:31:10 +00:00
SpeculativeExecution.cpp Revert r301950: SpeculativeExecution: Stop using whitelist for costs 2017-05-10 12:30:07 +00:00
StraightLineStrengthReduce.cpp [IR] De-virtualize ~Value to save a vptr 2017-05-18 17:24:10 +00:00
StructurizeCFG.cpp fix trivial typos; NFC 2017-07-09 05:54:44 +00:00
TailRecursionElimination.cpp [TRE] Improve code motion in TRE, use AA to tell whether a load can be moved before a call that writes to memory. 2017-06-19 15:21:18 +00:00