David Majnemer 62baa594d7 ScalarEvolution: HowFarToZero was wrongly using signed division ...

HowFarToZero was supposed to use unsigned division in order to calculate
the backedge taken count.  However, SCEVDivision::divide performs signed
division.  Unless I am mistaken, no users of SCEVDivision actually want
signed arithmetic: switch to udiv and urem.

This fixes PR21578.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222093 91177308-0d34-0410-b5e6-96231b3b80d8

2014-11-16 07:30:35 +00:00

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2007-07-15-NegativeStride.ll

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2007-08-06-MisinterpretBranch.ll

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2007-08-06-Unsigned.ll

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2007-09-27-LargeStepping.ll

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2007-11-14-SignedAddRec.ll

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2007-11-18-OrInstruction.ll

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2008-02-11-ReversedCondition.ll

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2008-02-12-SMAXTripCount.ll

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2008-02-15-UMax.ll

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2008-05-25-NegativeStepToZero.ll

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2008-06-12-BinomialInt64.ll

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2008-07-12-UnneededSelect1.ll

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2008-07-12-UnneededSelect2.ll

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2008-07-19-InfiniteLoop.ll

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2008-07-19-WrappingIV.ll

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2008-07-29-SGTTripCount.ll

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2008-07-29-SMinExpr.ll

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2008-08-04-IVOverflow.ll

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2008-08-04-LongAddRec.ll

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2008-11-02-QuadraticCrash.ll

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2008-11-15-CubicOOM.ll

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2008-11-18-LessThanOrEqual.ll

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2008-11-18-Stride1.ll

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2008-11-18-Stride2.ll

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2008-12-08-FiniteSGE.ll

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2008-12-11-SMaxOverflow.ll

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2008-12-14-StrideAndSigned.ll

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2008-12-15-DontUseSDiv.ll

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2009-01-02-SignedNegativeStride.ll

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2009-04-22-TruncCast.ll

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2009-05-09-PointerEdgeCount.ll

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2009-07-04-GroupConstantsWidthMismatch.ll

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2010-09-03-RequiredTransitive.ll

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2011-03-09-ExactNoMaxBECount.ll

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2011-04-26-FoldAddRec.ll

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2011-10-04-ConstEvolve.ll

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2012-03-26-LoadConstant.ll

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2012-05-18-LoopPredRecurse.ll

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2012-05-29-MulAddRec.ll

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and-xor.ll

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avoid-infinite-recursion-0.ll

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avoid-infinite-recursion-1.ll

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avoid-smax-0.ll

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avoid-smax-1.ll

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div-overflow.ll

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do-loop.ll

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fold.ll

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how-far-to-zero.ll

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load-with-range-metadata.ll

This patch teaches ScalarEvolution to pick and use !range metadata.

2014-10-10 21:22:34 +00:00

load.ll

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max-trip-count-address-space.ll

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max-trip-count.ll

Adding testcase for PR18886.

2014-05-27 06:44:25 +00:00

nsw-offset-assume.ll

Make use @llvm.assume for loop guards in ScalarEvolution

2014-09-07 21:37:59 +00:00

nsw-offset.ll

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nsw.ll

[SCEV] Improve Scalar Evolution's use of no {un,}signed wrap flags

2014-10-31 11:40:32 +00:00

pointer-sign-bits.ll

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pr3909.ll

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scev-aa.ll

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scev-invalid.ll

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sext-inreg.ll

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sext-iv-0.ll

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sext-iv-1.ll

Use FileCheck in a few tests.

2014-11-06 15:05:51 +00:00

sext-iv-2.ll

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sle.ll

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smax.ll

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SolveQuadraticEquation.ll

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trip-count2.ll

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trip-count3.ll

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trip-count4.ll

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trip-count5.ll

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trip-count6.ll

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trip-count7.ll

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trip-count8.ll

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trip-count9.ll

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trip-count10.ll

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trip-count11.ll

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trip-count12.ll

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trip-count-pow2.ll

ScalarEvolution: HowFarToZero was wrongly using signed division

2014-11-16 07:30:35 +00:00

trip-count-switch.ll

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trip-count.ll

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undefined.ll

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unreachable-code.ll

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unsimplified-loop.ll

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zext-signed-addrec.ll

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zext-wrap.ll

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