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llvm-6502/test/Transforms/InstCombine
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Anders Carlsson 77bc49e5e2 Recognize and simplify 
(A+B) == A  ->  B == 0
A == (A+B)  ->  B == 0



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124567 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-30 22:01:13 +00:00
..
2002-03-11-InstCombineHang.ll
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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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2003-11-13-ConstExprCastCall.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
Allow instcombine to combine "sext(a) >u const" to "a >u trunc(const)".
2009-12-17 22:42:29 +00:00
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
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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
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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
add newlines at the end of files.
2010-04-07 22:53:17 +00:00
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
Teach APFloat how to create both QNaNs and SNaNs and with arbitrary-width
2010-02-28 02:51:25 +00:00
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
Optimize icmp of null and select of two constants even if the select has
2009-12-18 08:22:35 +00:00
2010-01-28-NegativeSRem.ll
Fix PR6165. The bug was that LHSKnownZero was being and'd with DemandedMask
2010-01-28 17:22:42 +00:00
2010-03-03-ExtElim.ll
Make the 'icmp pred trunc(ext(X)), CST --> icmp pred X, ext(trunc(CST))'
2010-03-04 06:54:10 +00:00
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
add2.ll
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add3.ll
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add-shrink.ll
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add-sitofp.ll
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add.ll
Recognize and simplify
2011-01-30 22:01:13 +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
Teach instcombine to promote alloca array sizes.
2010-05-28 15:09:00 +00:00
and2.ll
Teach InstructionSimplify to fold (A & B) & A -> A & B and (A | B) | A -> A | B.
2010-09-10 22:39:55 +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
change the preferred canonical form for a sign extension to be
2010-01-10 07:08:30 +00:00
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
Teach instCombine to remove malloc+free if malloc's only uses are comparisons
2010-05-27 19:09:06 +00:00
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
InstCombine should not fold sext/zext of a vector and a bitcast to a scalar to a sext/zext
2010-01-23 04:35:57 +00:00
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-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
Fold bswap(undef) to undef.
2010-02-17 00:54:58 +00:00
bswap.ll
remove two trunc xforms that are subsumed by EvaluateInDifferentType.
2010-01-05 22:01:41 +00:00
call2.ll
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call-cast-target.ll
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call-intrinsics.ll
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call.ll
Remove arm_apcscc from the test files. It is the default and doing this
2010-06-17 15:18:27 +00:00
canonicalize_branch.ll
filecheckize this.
2010-01-18 22:00:46 +00:00
cast_ptr.ll
merge some tests.
2010-01-05 21:54:09 +00:00
cast-mul-select.ll
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cast-set.ll
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cast.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
compare-signs.ll
Fix some CHECK lines which were ignored by accident.
2009-12-12 09:25:50 +00:00
constant-fold-compare.ll
Aggressively flip compare constant expressions where appropriate; constant
2009-12-17 06:07:04 +00:00
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-cmp-overflow.ll
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div.ll
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enforce-known-alignment.ll
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exact-sdiv.ll
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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
Don't do (X != Y) ? X : Y -> X for floating-point values; it doesn't
2010-02-23 17:17:57 +00:00
fcmp-special.ll
Constant-fold certain comparisons with infinity and negative infinity.
2010-02-22 04:06:03 +00:00
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-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
Reduce fsub-fadd.ll and merge it into fsub-fsub.ll. Rename fsub-fsub.ll to
2010-01-17 00:21:21 +00:00
gepgep.ll
When constant folding GEP of GEP, do not crash if an index of
2010-03-12 17:55:20 +00:00
getelementptr.ll
Add a testcase for getelementptr index promotion.
2010-05-28 15:07:59 +00:00
hoist_instr.ll
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icmp.ll
Fix a random missed optimization by making InstCombine more aggressive when determining which bits are demanded by
2011-01-11 00:36:45 +00:00
idioms.ll
optimize ~(~X >>s Y) --> (X >>s Y), patch by Edmund Grimley
2010-01-19 18:16:19 +00:00
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
Print empty structs as {} rather than { }.
2010-04-08 18:03:05 +00:00
JavaCompare.ll
make these less sensitive to temporary naming.
2010-03-05 08:43:33 +00:00
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
make these less sensitive to temporary naming.
2010-03-05 08:43:33 +00:00
load-select.ll
Remove ARM-specific calling convention from this test. Target data is
2010-01-30 00:40:23 +00:00
load.ll
merge two tests.
2010-07-12 00:19:47 +00:00
loadstore-alignment.ll
Delete useless trailing semicolons.
2010-01-05 17:55:26 +00:00
logical-select.ll
fix logical-select to invoke filecheck right, and fix hte instcombine
2010-02-05 19:53:02 +00:00
lshr-phi.ll
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malloc2.ll
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malloc3.ll
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malloc-free-delete.ll
Teach instCombine to remove malloc+free if malloc's only uses are comparisons
2010-05-27 19:09:06 +00:00
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
Reapply address space patch after fixing an issue in MemCopyOptimizer.
2010-04-04 03:10:48 +00:00
memset.ll
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mul-masked-bits.ll
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mul.ll
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multi-use-or.ll
Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,
2010-03-02 01:11:08 +00:00
narrow.ll
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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
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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
add newlines at the end of files.
2010-04-07 22:53:17 +00:00
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.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
enhance FoldOpIntoPhi in instcombine to try harder when a phi has
2011-01-16 05:28:59 +00:00
pr2645-0.ll
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pr2645-1.ll
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pr2996.ll
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pr8547.ll
When checking that the necessary bits are zero in
2010-11-10 01:30:56 +00:00
preserve-sminmax.ll
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ptr-int-cast.ll
Convert this test to FileCheck and add a testcase for PR3574.
2010-02-23 01:28:09 +00:00
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
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sdiv-shift.ll
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select-2.ll
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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
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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
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sext.ll
merge sext-2 into sext.ll
2009-12-02 05:34:35 +00:00
shift-sra.ll
Fix a typo in ValueTracking that's causing instcombine to delete needed shift instructions.
2010-03-13 02:20:29 +00:00
shift.ll
Move some shift transforms out of instcombine and into InstructionSimplify.
2011-01-14 00:37:45 +00:00
shufflemask-undef.ll
…
shufflevec-constant.ll
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signed-comparison.ll
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signext.ll
Simplify/generalize the xor+add->sign-extend instcombine.
2010-01-31 04:29:12 +00:00
simplify-demanded-bits-pointer.ll
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sink_instruction.ll
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sitofp.ll
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sqrt.ll
Fix a serious performance regression introduced by r108687 on linux:
2010-09-07 20:01:38 +00:00
srem1.ll
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srem-simplify-bug.ll
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srem.ll
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stack-overalign.ll
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stacksaverestore.ll
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store.ll
Fix PR5471 by removing an instcombine xform. Some pieces of the code
2009-11-26 22:04:42 +00:00
strcpy_chk.ll
Verify function prototypes before trying to optimize functions. We also
2010-04-12 04:48:00 +00:00
sub.ll
InstCombine: Implement X - A*-B -> X + A*B.
2010-11-22 20:31:27 +00:00
trunc.ll
implement an instcombine xform that canonicalizes casts outside of and-with-constant operations.
2011-01-15 06:32:33 +00:00
udiv_select_to_select_shift.ll
…
udiv-simplify-bug-0.ll
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udiv-simplify-bug-1.ll
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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
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vec_narrow.ll
Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,
2010-03-02 01:11:08 +00:00
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
Rename ValueRequiresCast to ShouldOptimizeCast, to better reflect
2010-02-11 06:26:33 +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
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zeroext-and-reduce.ll
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zext-bool-add-sub.ll
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zext-fold.ll
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zext-or-icmp.ll
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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.