Max Kazantsev 99dd56e4a9 [SCEV] Fix predicate usage in computeExitLimitFromICmp ...

In this method, we invoke `SimplifyICmpOperands` which takes the `Cond` predicate
by reference and may change it along with `LHS` and `RHS` SCEVs. But then we invoke
`computeShiftCompareExitLimit` with Values from which the SCEVs have been derived,
these Values have not been modified while `Cond` could be.

One of possible outcomes of this is that we may falsely prove that an infinite loop ends
within some finite number of iterations.

In this patch, we save the original `Cond` and pass it along with original operands.
This logic may be removed in future once `computeShiftCompareExitLimit` works
with SCEVs instead of value operands.

Reviewed By: sanjoy
Differential Revision: https://reviews.llvm.org/D40953


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320142 91177308-0d34-0410-b5e6-96231b3b80d8

2017-12-08 12:19:45 +00:00

..

AliasSet

Use WeakVH instead of WeakTrackingVH in AliasSetTracker's UnkownInsts

2017-05-01 17:07:56 +00:00

AssumptionCache

Add files I seem to have dropped in my revert (r290086).

2016-12-19 08:32:13 +00:00

BasicAA

Allow inaccessiblememonly and inaccessiblemem_or_argmemonly to be overwriten on call site with operand bundle

2017-11-02 12:18:33 +00:00

BlockFrequencyInfo

Add heuristics for irreducible loop metadata under PGO

2017-11-20 21:03:38 +00:00

BranchProbabilityInfo

[BranchProbabilityInfo] Handle irreducible loops.

2017-11-01 15:16:50 +00:00

CallGraph

[CG] Add a new pass manager printer pass for the old call graph and

2016-03-10 11:24:11 +00:00

CFLAliasAnalysis

[CFLAA] Add missing break; note things are broken.

2017-05-31 02:35:26 +00:00

ConstantFolding

[ConstantFolding] Avoid assert when folding ptrtoint of vectorized GEP

2017-10-24 12:08:11 +00:00

CostModel

[X86] Promote fp_to_sint v16f32->v16i16/v16i8 to avoid scalarization.

2017-11-29 00:32:09 +00:00

Delinearization

[SCEV] Assume parameters coming from function calls contain IVs

2017-05-27 15:17:49 +00:00

DemandedBits

[Analysis] Support bitreverse in -demanded-bits pass

2017-04-13 16:44:25 +00:00

DependenceAnalysis

[DependenceAnalysis] Make sure base objects are the same when comparing GEPs

2017-07-05 21:35:47 +00:00

DivergenceAnalysis

AMDGPU: Change DivergenceAnalysis for function arguments

2017-04-19 17:42:34 +00:00

DominanceFrontier

Another fix the testcase introduced by r261903 - Add the missing matches

2016-02-26 03:41:47 +00:00

Dominators

[Dominators] Don't compute DFS InOut numbers eagerly.

2017-06-30 01:28:21 +00:00

GlobalsModRef

[PassManager] Retire cl::opt that have been set for a while. NFCI.

2017-10-02 23:39:20 +00:00

IVUsers

Re-enable "[SCEV] Do not fold dominated SCEVUnknown into AddRecExpr start"

2017-05-26 06:47:04 +00:00

LazyCallGraph

[LCG] Spell the printing pass pipeline name for the lazy call graph

2016-03-10 11:24:06 +00:00

LazyValueAnalysis

Revert r314435: "[JumpThreading] Preserve DT and LVI across the pass"

2017-09-30 11:57:19 +00:00

Lint

[Lint] Don't warn about passing alloca'd value to tail call if using byval

2017-11-15 07:46:48 +00:00

LoopAccessAnalysis

[LAA] Allow more run-time alias checks by coercing pointer expressions to AddRecExprs

2017-09-12 07:48:22 +00:00

LoopInfo

[PM] Port LoopInfo to the new pass manager, adding both a LoopAnalysis

2015-01-20 10:58:50 +00:00

MemoryDependenceAnalysis

[PM] The assumption cache is fundamentally designed to be self-updating,

2017-01-15 00:26:18 +00:00

MemorySSA

Let llvm.invariant.group.barrier accepts pointer to any address space

2017-11-16 16:32:16 +00:00

PostDominators

[Dominators] Include infinite loops in PostDominatorTree

2017-08-15 18:14:57 +00:00

ProfileSummary

Reapply r271728 after adding move cobstructor for ProfileSummaryInfo

2016-06-03 22:54:26 +00:00

RegionInfo

[Dominators] Include infinite loops in PostDominatorTree

2017-08-15 18:14:57 +00:00

ScalarEvolution

[SCEV] Fix predicate usage in computeExitLimitFromICmp

2017-12-08 12:19:45 +00:00

ScopedNoAliasAA

[ScopedNoAliasAA] Make test basic.ll less confusing

2016-03-07 17:49:10 +00:00

TypeBasedAliasAnalysis

[BasicAA] Use MayAlias instead of PartialAlias for fallback.

2017-06-21 18:25:37 +00:00

ValueTracking

[ValueTracking] return zero when there's conflict in known bits of a shift (PR34838)

2017-10-12 17:31:46 +00:00

alias-analysis-uses.ll

Add an "addUsedAAAnalyses" helper function

2016-02-09 01:21:57 +00:00