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llvm-6502/test/Transforms/InstCombine
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Nick Lewycky 58bfcdbcf6 Thread comparisons over udiv/sdiv/ashr/lshr exact and lshr nuw/nsw whenever 
possible. This goes into instcombine and instsimplify because instsimplify
doesn't need to check hasOneUse since it returns (almost exclusively) constants.

This fixes PR9343 #4 #5 and #8!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127064 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-05 05:19:11 +00:00
..
2002-03-11-InstCombineHang.ll
…
2002-05-14-SubFailure.ll
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2002-08-02-CastTest.ll
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2002-12-05-MissedConstProp.ll
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2003-05-26-CastMiscompile.ll
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2003-05-27-ConstExprCrash.ll
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2003-06-05-BranchInvertInfLoop.ll
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2003-07-21-ExternalConstant.ll
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2003-08-12-AllocaNonNull.ll
remove a use of llvm-dis
2010-11-30 02:04:15 +00:00
2003-09-09-VolatileLoadElim.ll
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2003-10-29-CallSiteResolve.ll
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2003-11-03-VarargsCallBug.ll
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2004-01-13-InstCombineInvokePHI.ll
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2004-02-23-ShiftShiftOverflow.ll
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2004-03-13-InstCombineInfLoop.ll
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2004-04-04-InstCombineReplaceAllUsesWith.ll
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2004-05-07-UnsizedCastLoad.ll
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2004-07-27-ConstantExprMul.ll
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2004-08-09-RemInfLoop.ll
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2004-08-10-BoolSetCC.ll
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2004-09-20-BadLoadCombine2.ll
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2004-09-20-BadLoadCombine.ll
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2004-09-28-BadShiftAndSetCC.ll
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2004-11-22-Missed-and-fold.ll
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2004-11-27-SetCCForCastLargerAndConstant.ll
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2004-12-08-RemInfiniteLoop.ll
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2005-03-04-ShiftOverflow.ll
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2005-04-07-UDivSelectCrash.ll
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2005-06-15-DivSelectCrash.ll
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2005-06-15-ShiftSetCCCrash.ll
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2005-06-16-RangeCrash.ll
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2005-06-16-SetCCOrSetCCMiscompile.ll
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2005-07-07-DeadPHILoop.ll
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2006-02-13-DemandedMiscompile.ll
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2006-02-28-Crash.ll
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2006-03-30-ExtractElement.ll
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2006-04-28-ShiftShiftLongLong.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
2006-05-04-DemandedBitCrash.ll
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2006-09-15-CastToBool.ll
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2006-10-19-SignedToUnsignedCastAndConst-2.ll
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2006-10-20-mask.ll
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2006-10-26-VectorReassoc.ll
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2006-11-03-Memmove64.ll
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2006-11-10-ashr-miscompile.ll
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2006-12-01-BadFPVectorXform.ll
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2006-12-05-fp-to-int-ext.ll
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2006-12-08-Phi-ICmp-Op-Fold.ll
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2006-12-08-Select-ICmp.ll
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2006-12-15-Range-Test.ll
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2006-12-23-Select-Cmp-Cmp.ll
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2007-01-13-ExtCompareMiscompile.ll
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2007-01-14-FcmpSelf.ll
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2007-01-18-VectorInfLoop.ll
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2007-01-27-AndICmp.ll
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2007-02-01-LoadSinkAlloca.ll
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2007-02-07-PointerCast.ll
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2007-02-23-PhiFoldInfLoop.ll
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2007-03-13-CompareMerge.ll
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2007-03-19-BadTruncChangePR1261.ll
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2007-03-21-SignedRangeTest.ll
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2007-03-25-BadShiftMask.ll
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2007-03-25-DoubleShift.ll
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2007-03-26-BadShiftMask.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
2007-04-04-BadFoldBitcastIntoMalloc.ll
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2007-04-08-SingleEltVectorCrash.ll
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2007-05-04-Crash.ll
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2007-05-10-icmp-or.ll
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2007-05-14-Crash.ll
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2007-05-18-CastFoldBug.ll
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2007-06-06-AshrSignBit.ll
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2007-06-21-DivCompareMiscomp.ll
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2007-08-02-InfiniteLoop.ll
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2007-09-10-AliasConstFold.ll
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2007-09-11-Trampoline.ll
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2007-09-17-AliasConstFold2.ll
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2007-10-10-EliminateMemCpy.ll
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2007-10-12-Crash.ll
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2007-10-28-stacksave.ll
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2007-10-31-RangeCrash.ll
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2007-10-31-StringCrash.ll
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2007-11-07-OpaqueAlignCrash.ll
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2007-11-15-CompareMiscomp.ll
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2007-11-22-IcmpCrash.ll
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2007-11-25-CompatibleAttributes.ll
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2007-12-10-ConstFoldCompare.ll
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2007-12-12-GEPScale.ll
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2007-12-16-AsmNoUnwind.ll
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2007-12-18-AddSelCmpSub.ll
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2007-12-28-IcmpSub2.ll
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2008-01-06-BitCastAttributes.ll
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2008-01-06-CastCrash.ll
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2008-01-06-VoidCast.ll
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2008-01-13-AndCmpCmp.ll
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2008-01-13-NoBitCastAttributes.ll
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2008-01-14-DoubleNest.ll
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2008-01-14-VarArgTrampoline.ll
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2008-01-21-MismatchedCastAndCompare.ll
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2008-01-21-MulTrunc.ll
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2008-01-27-FloatSelect.ll
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2008-01-29-AddICmp.ll
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2008-02-13-MulURem.ll
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2008-02-16-SDivOverflow2.ll
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2008-02-16-SDivOverflow.ll
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2008-02-23-MulSub.ll
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2008-02-28-OrFCmpCrash.ll
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2008-03-13-IntToPtr.ll
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2008-04-22-ByValBitcast.ll
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2008-04-28-VolatileStore.ll
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2008-04-29-VolatileLoadDontMerge.ll
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2008-04-29-VolatileLoadMerge.ll
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2008-05-08-LiveStoreDelete.ll
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2008-05-08-StrLenSink.ll
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2008-05-09-SinkOfInvoke.ll
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2008-05-17-InfLoop.ll
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2008-05-18-FoldIntToPtr.ll
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2008-05-22-IDivVector.ll
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2008-05-22-NegValVector.ll
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2008-05-23-CompareFold.ll
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2008-05-31-AddBool.ll
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2008-05-31-Bools.ll
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2008-06-05-ashr-crash.ll
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2008-06-08-ICmpPHI.ll
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2008-06-13-InfiniteLoopStore.ll
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2008-06-13-ReadOnlyCallStore.ll
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2008-06-19-UncondLoad.ll
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2008-06-21-CompareMiscomp.ll
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2008-06-24-StackRestore.ll
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2008-07-08-AndICmp.ll
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2008-07-08-ShiftOneAndOne.ll
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2008-07-08-SubAnd.ll
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2008-07-08-VolatileLoadMerge.ll
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2008-07-09-SubAndError.ll
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2008-07-10-CastSextBool.ll
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2008-07-10-ICmpBinOp.ll
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2008-07-11-RemAnd.ll
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2008-07-13-DivZero.ll
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2008-07-16-fsub.ll
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2008-07-16-sse2_storel_dq.ll
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2008-08-05-And.ll
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2008-08-17-ICmpXorSignbit.ll
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2008-09-02-VectorCrash.ll
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2008-09-29-FoldingOr.ll
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2008-10-11-DivCompareFold.ll
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2008-10-23-ConstFoldWithoutMask.ll
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2008-11-01-SRemDemandedBits.ll
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2008-11-08-FCmp.ll
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2008-11-20-DivMulRem.ll
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC
2011-01-28 16:51:11 +00:00
2008-11-27-IDivVector.ll
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2008-11-27-MultiplyIntVec.ll
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2008-11-27-UDivNegative.ll
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2008-12-17-SRemNegConstVec.ll
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2009-01-05-i128-crash.ll
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2009-01-08-AlignAlloca.ll
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2009-01-16-PointerAddrSpace.ll
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2009-01-19-fmod-constant-float-specials.ll
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2009-01-19-fmod-constant-float.ll
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2009-01-24-EmptyStruct.ll
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2009-01-31-InfIterate.ll
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2009-01-31-Pressure.ll
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2009-02-04-FPBitcast.ll
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2009-02-20-InstCombine-SROA.ll
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2009-02-21-LoadCST.ll
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2009-02-25-CrashZeroSizeArray.ll
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2009-03-18-vector-ashr-crash.ll
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2009-03-20-AShrOverShift.ll
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2009-03-24-InfLoop.ll
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2009-04-07-MulPromoteToI96.ll
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2009-05-23-FCmpToICmp.ll
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2009-06-11-StoreAddrSpace.ll
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2009-06-16-SRemDemandedBits.ll
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2009-07-02-MaskedIntVector.ll
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2009-12-17-CmpSelectNull.ll
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2010-01-28-NegativeSRem.ll
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2010-03-03-ExtElim.ll
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2010-11-01-lshr-mask.ll
Have SimplifyBinOp dispatch Xor, Add and Sub to the corresponding methods
2010-12-20 14:47:04 +00:00
2010-11-21-SizeZeroTypeGEP.ll
If a GEP index simply advances by multiples of a type of zero size,
2010-11-22 16:32:50 +00:00
2010-11-23-Distributed.ll
Add a generic expansion transform: A op (B op' C) -> (A op B) op' (A op C)
2010-12-22 13:36:08 +00:00
2011-02-14-InfLoop.ll
Fix 9216 - Endless loop in InstCombine pass.
2011-02-15 07:13:48 +00:00
2011-02-16-InsertelementHang.ll
PR9218: SimplifyDemandedVectorElts can return a non-null value that is not
2011-02-19 22:42:40 +00:00
add2.ll
preserve NUW/NSW when transforming add x,x
2011-02-17 02:23:02 +00:00
add3.ll
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add-shrink.ll
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add-sitofp.ll
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add.ll
Also fold (A+B) == A -> B == 0 when the add is commuted.
2011-02-11 21:46:48 +00:00
addnegneg.ll
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adjust-for-sminmax.ll
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align-2d-gep.ll
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align-addr.ll
Make instcombine set explicit alignments on load or store
2010-08-03 18:20:32 +00:00
align-external.ll
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alloca.ll
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and2.ll
Make InstCombiner::FoldAndOfICmps create a ConstantRange that's the
2011-03-01 15:05:01 +00:00
and-compare.ll
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and-fcmp.ll
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and-not-or.ll
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and-or-and.ll
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and-or-not.ll
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and-or.ll
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and-xor-merge.ll
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and.ll
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apint-add1.ll
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apint-add2.ll
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apint-and1.ll
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apint-and2.ll
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apint-and-compare.ll
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apint-and-or-and.ll
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apint-and-xor-merge.ll
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apint-call-cast-target.ll
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apint-cast-and-cast.ll
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apint-cast-cast-to-and.ll
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apint-cast.ll
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apint-div1.ll
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apint-div2.ll
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apint-mul1.ll
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apint-mul2.ll
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apint-not.ll
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apint-or1.ll
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apint-or2.ll
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apint-rem1.ll
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apint-rem2.ll
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apint-select.ll
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apint-shift-simplify.ll
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apint-shift.ll
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apint-shl-trunc.ll
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apint-sub.ll
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apint-xor1.ll
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apint-xor2.ll
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apint-zext1.ll
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apint-zext2.ll
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ashr-nop.ll
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badmalloc.ll
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binop-cast.ll
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bit-checks.ll
Generalize instcombine's support for combining multiple bit checks into a single test. Patch by Dirk Steinke!
2010-09-08 22:16:17 +00:00
bit-tracking.ll
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bitcast-sext-vector.ll
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bitcast-store.ll
Fix a case where instcombine was stripping metadata (and alignment)
2010-10-25 16:16:27 +00:00
bitcast-vec-canon.ll
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bitcast-vec-uniform.ll
Enhance constant folding of bitcast operations on vectors of floats.
2011-02-17 21:22:27 +00:00
bitcast-vector-fold.ll
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bitcast.ll
handle the constant case of vector insertion. For something
2010-08-28 01:50:57 +00:00
bitcount.ll
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bittest.ll
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bswap-fold.ll
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bswap.ll
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call2.ll
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call-cast-target.ll
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call-intrinsics.ll
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call.ll
change instcombine to not turn a call to non-varargs bitcast of
2011-02-24 05:10:56 +00:00
canonicalize_branch.ll
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cast_ptr.ll
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cast-mul-select.ll
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cast-set.ll
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cast.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
compare-signs.ll
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constant-fold-compare.ll
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constant-fold-gep.ll
implement constant folding support for an exotic constant expr:
2011-01-06 06:19:46 +00:00
CPP_min_max.ll
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crash.ll
fix PR9013, an infinite loop in instcombine.
2011-01-21 05:29:50 +00:00
dce-iterate.ll
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deadcode.ll
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dg.exp
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div.ll
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enforce-known-alignment.ll
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exact.ll
add PR#
2011-02-13 08:27:31 +00:00
extractvalue.ll
Transform (extractvalue (load P), ...) to (load (gep P, 0, ...)) if the load has no other uses, shrinking the load.
2010-11-29 21:56:20 +00:00
fcmp-select.ll
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fcmp-special.ll
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fold-bin-operand.ll
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fold-calls.ll
Don't try to constant fold libm functions with non-finite arguments.
2010-09-27 21:29:20 +00:00
fold-vector-select.ll
Fix 9173.
2011-02-11 19:37:55 +00:00
fold-vector-zero.ll
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fp-ret-bitcast.ll
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fpcast.ll
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fpextend.ll
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fsub.ll
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gepgep.ll
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getelementptr.ll
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hoist_instr.ll
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icmp.ll
Thread comparisons over udiv/sdiv/ashr/lshr exact and lshr nuw/nsw whenever
2011-03-05 05:19:11 +00:00
idioms.ll
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IntPtrCast.ll
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intrinsics.ll
X86 supports i8/i16 overflow ops (except i8 multiplies), we should
2010-12-19 20:03:11 +00:00
invariant.ll
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JavaCompare.ll
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known_align.ll
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load3.ll
fix PR7429, a crash turning a load from a string into a float.
2010-07-12 00:22:51 +00:00
load-cmp.ll
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load-select.ll
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load.ll
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loadstore-alignment.ll
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logical-select.ll
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lshr-phi.ll
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malloc2.ll
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malloc3.ll
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malloc-free-delete.ll
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malloc.ll
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memcpy-to-load.ll
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memcpy.ll
fix PR8267 - Instcombine shouldn't optimizer away volatile memcpy's.
2010-10-01 05:51:02 +00:00
memmove.ll
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memset2.ll
Test case for r122215 when InstCombine optimizes memset
2010-12-20 01:06:23 +00:00
memset_chk.ll
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memset.ll
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mul-masked-bits.ll
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mul.ll
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multi-use-or.ll
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narrow.ll
…
neon-intrinsics.ll
Teach instcombine to set the alignment arguments for NEON load/store intrinsics.
2010-10-22 21:41:48 +00:00
no-negzero.ll
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not-fcmp.ll
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not.ll
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nothrow.ll
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nsw.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
objsize.ll
Revert 122959, it needs more thought. Add it back to README.txt with additional notes.
2011-01-07 20:42:20 +00:00
odr-linkage.ll
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or-fcmp.ll
Just because we have determined that an (fcmp | fcmp) is true for A < B,
2011-01-21 19:39:42 +00:00
or-to-xor.ll
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or-xor.ll
InstCombine: Add a bunch of combines of the form x | (y ^ z).
2011-02-20 13:23:43 +00:00
or.ll
Teach InstCombine to merge (icmp ult (X + CA), C1) | (icmp eq X, C2) into (icmp ult (X + CA), C1 + 1) if C2 + CA == C1.
2010-12-20 16:18:51 +00:00
overflow.ll
recognize an unsigned add with overflow idiom into uadd.
2010-12-19 19:37:52 +00:00
phi-merge-gep.ll
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phi.ll
have instcombine preserve nsw/nuw/exact when sinking
2011-02-17 23:01:49 +00:00
pr2645-0.ll
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pr2645-1.ll
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pr2996.ll
…
pr8547.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
preserve-sminmax.ll
…
ptr-int-cast.ll
…
README.txt
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rem.ll
InstCombine: Add a missing irem identity (X % X -> 0).
2010-11-17 19:11:46 +00:00
sdiv-1.ll
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sdiv-2.ll
…
sdiv-shift.ll
…
select-2.ll
…
select-crash.ll
Teach InstCombine not to use Add and Neg on FP. PR 8490.
2010-10-27 23:45:18 +00:00
select-load-call.ll
…
select.ll
Clean up the tests a little, make sure we match an instruction in the right
2011-01-28 05:13:17 +00:00
set.ll
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setcc-strength-reduce.ll
…
sext.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
shift-sra.ll
…
shift.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
shufflemask-undef.ll
…
shufflevec-constant.ll
…
signed-comparison.ll
…
signext.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
simplify-demanded-bits-pointer.ll
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sink_instruction.ll
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sitofp.ll
…
sqrt.ll
Fix a serious performance regression introduced by r108687 on linux:
2010-09-07 20:01:38 +00:00
srem1.ll
…
srem-simplify-bug.ll
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srem.ll
…
stack-overalign.ll
…
stacksaverestore.ll
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store.ll
…
strcpy_chk.ll
…
sub.ll
Add some transforms of the kind X-Y>X -> 0>Y which are valid when there is no
2011-02-18 16:25:37 +00:00
trunc.ll
Enhance a bunch of transformations in instcombine to start generating
2011-02-10 05:36:31 +00:00
udiv_select_to_select_shift.ll
…
udiv-simplify-bug-0.ll
…
udiv-simplify-bug-1.ll
…
udivrem-change-width.ll
…
urem-simplify-bug.ll
more test cleanup
2010-09-02 22:38:56 +00:00
urem.ll
…
vec_demanded_elts.ll
Teach instcombine about the rest of the SSE and SSE2 conversion
2011-01-10 07:19:37 +00:00
vec_extract_elt.ll
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vec_insertelt.ll
…
vec_narrow.ll
…
vec_sext.ll
Add vector versions of some existing scalar transforms to aid codegen in matching psign & pblend operations to the IR produced by clang/gcc for their C idioms.
2010-12-17 23:12:19 +00:00
vec_shuffle.ll
Change instcombine's getShuffleMask to represent undef with negative values.
2010-10-29 22:03:05 +00:00
vector-casts.ll
Teach PatternMatch that splat vectors could be floating point as well as
2011-02-15 23:13:23 +00:00
vector-srem.ll
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volatile_store.ll
…
xor2.ll
Re-apply r113679, which was reverted in r113720, which added a paid of new instcombine transforms
2010-09-13 17:59:27 +00:00
xor-undef.ll
…
xor.ll
…
zero-point-zero-add.ll
…
zeroext-and-reduce.ll
…
zext-bool-add-sub.ll
…
zext-fold.ll
…
zext-or-icmp.ll
…
zext.ll
…

README.txt 

This directory contains test cases for the instcombine transformation.  The
dated tests are actual bug tests, whereas the named tests are used to test
for features that the this pass should be capable of performing.