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3479be91c4
llvm-6502/test/Transforms/InstCombine
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Bill Wendling 3479be91c4 Add transformation: 
xor (or (icmp, icmp), true) -> and(icmp, icmp)

This is possible because of De Morgan's law.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-01 01:18:23 +00:00
..
2002-03-11-InstCombineHang.ll
2002-05-14-SubFailure.ll
2002-05-14-TouchDeletedInst.ll
2002-08-02-CastTest.ll
2002-09-17-GetElementPtrCrash.ll
2002-12-05-MissedConstProp.ll
2003-05-26-CastMiscompile.ll
2003-05-27-ConstExprCrash.ll
2003-06-05-BranchInvertInfLoop.ll
2003-06-22-ConstantExprCrash.ll
2003-07-21-ExternalConstant.ll
2003-08-12-AllocaNonNull.ll
2003-09-09-VolatileLoadElim.ll
2003-10-23-InstcombineNullFail.ll
2003-10-29-CallSiteResolve.ll
2003-11-03-VarargsCallBug.ll
2003-11-13-ConstExprCastCall.ll
2004-01-13-InstCombineInvokePHI.ll
2004-02-23-ShiftShiftOverflow.ll
2004-03-13-InstCombineInfLoop.ll
2004-04-04-InstCombineReplaceAllUsesWith.ll
2004-05-07-UnsizedCastLoad.ll
2004-07-27-ConstantExprMul.ll
2004-08-09-RemInfLoop.ll
2004-08-10-BoolSetCC.ll
2004-09-20-BadLoadCombine2.ll
2004-09-20-BadLoadCombine.ll
2004-09-28-BadShiftAndSetCC.ll
2004-11-22-Missed-and-fold.ll
2004-11-27-SetCCForCastLargerAndConstant.ll
2004-12-08-InstCombineCrash.ll
2004-12-08-RemInfiniteLoop.ll
2005-03-04-ShiftOverflow.ll
2005-04-07-UDivSelectCrash.ll
2005-06-15-DivSelectCrash.ll
2005-06-15-ShiftSetCCCrash.ll
2005-06-16-RangeCrash.ll
2005-06-16-SetCCOrSetCCMiscompile.ll
2005-07-07-DeadPHILoop.ll
2006-02-07-SextZextCrash.ll
2006-02-13-DemandedMiscompile.ll
2006-02-28-Crash.ll
2006-03-30-ExtractElement.ll
2006-04-01-InfLoop.ll
2006-04-28-ShiftShiftLongLong.ll
2006-05-04-DemandedBitCrash.ll
2006-05-06-Infloop.ll
2006-06-28-infloop.ll
2006-09-11-EmptyStructCrash.ll
2006-09-15-CastToBool.ll
2006-10-19-SignedToUnsignedCastAndConst-2.ll
2006-10-19-SignedToUnsignedCastAndConst.ll
2006-10-20-mask.ll
2006-10-26-VectorReassoc.ll
2006-11-03-Memmove64.ll
2006-11-10-ashr-miscompile.ll
2006-11-27-XorBug.ll
2006-12-01-BadFPVectorXform.ll
2006-12-05-fp-to-int-ext.ll
2006-12-08-ICmp-Combining.ll
2006-12-08-Phi-ICmp-Op-Fold.ll
2006-12-08-Select-ICmp.ll
2006-12-10-ICmp-GEP-GEP.ll
2006-12-15-Range-Test.ll
2006-12-23-Select-Cmp-Cmp.ll
2007-01-13-ExtCompareMiscompile.ll
2007-01-14-FcmpSelf.ll
2007-01-18-VectorInfLoop.ll
2007-01-27-AndICmp.ll
2007-02-01-LoadSinkAlloca.ll
2007-02-07-PointerCast.ll
2007-02-23-PhiFoldInfLoop.ll
2007-03-13-CompareMerge.ll
2007-03-19-BadTruncChangePR1261.ll
2007-03-21-SignedRangeTest.ll
2007-03-25-BadShiftMask.ll
2007-03-25-DoubleShift.ll
2007-03-26-BadShiftMask.ll
2007-03-27-PR1280.ll
2007-03-31-InfiniteLoop.ll
2007-04-04-BadFoldBitcastIntoMalloc.ll
2007-04-08-SingleEltVectorCrash.ll
2007-05-04-Crash.ll
2007-05-10-icmp-or.ll
2007-05-14-Crash.ll
2007-05-18-CastFoldBug.ll
2007-06-06-AshrSignBit.ll
2007-06-21-DivCompareMiscomp.ll
2007-08-02-InfiniteLoop.ll
2007-09-05-EqualGEP.ll
2007-09-10-AliasConstFold.ll
2007-09-11-Trampoline.ll
2007-09-17-AliasConstFold2.ll
2007-10-10-EliminateMemCpy.ll
2007-10-12-Crash.ll
2007-10-28-EmptyField.ll
2007-10-28-stacksave.ll
2007-10-31-RangeCrash.ll
2007-10-31-StringCrash.ll
2007-11-07-OpaqueAlignCrash.ll
2007-11-15-CompareMiscomp.ll
2007-11-22-IcmpCrash.ll
2007-11-25-CompatibleAttributes.ll
2007-12-10-ConstFoldCompare.ll
2007-12-12-GEPScale.ll
2007-12-16-AsmNoUnwind.ll
2007-12-18-AddSelCmpSub.ll
2007-12-28-IcmpSub2.ll
2008-01-06-BitCastAttributes.ll
2008-01-06-CastCrash.ll
2008-01-06-VoidCast.ll
2008-01-13-AndCmpCmp.ll
2008-01-13-NoBitCastAttributes.ll
2008-01-14-DoubleNest.ll
2008-01-14-VarArgTrampoline.ll
2008-01-21-MismatchedCastAndCompare.ll
2008-01-21-MulTrunc.ll
2008-01-27-FloatSelect.ll
2008-01-29-AddICmp.ll
2008-02-04-GEPIdxBug.ll
2008-02-13-MulURem.ll
2008-02-16-SDivOverflow2.ll
2008-02-16-SDivOverflow.ll
2008-02-23-MulSub.ll
2008-02-28-OrFCmpCrash.ll
2008-03-13-IntToPtr.ll
2008-04-22-ByValBitcast.ll
2008-04-28-VolatileStore.ll
2008-04-29-VolatileLoadDontMerge.ll
2008-04-29-VolatileLoadMerge.ll
2008-05-08-LiveStoreDelete.ll
2008-05-08-StrLenSink.ll
2008-05-09-SinkOfInvoke.ll
2008-05-17-InfLoop.ll
2008-05-18-FoldIntToPtr.ll
2008-05-22-IDivVector.ll
2008-05-22-NegValVector.ll
2008-05-23-CompareFold.ll
2008-05-31-AddBool.ll
2008-05-31-Bools.ll
2008-06-05-ashr-crash.ll
2008-06-08-ICmpPHI.ll
2008-06-13-InfiniteLoopStore.ll
2008-06-13-ReadOnlyCallStore.ll
2008-06-19-UncondLoad.ll
2008-06-21-CompareMiscomp.ll
2008-06-24-StackRestore.ll
2008-07-08-AndICmp.ll
2008-07-08-ShiftOneAndOne.ll
2008-07-08-SubAnd.ll
2008-07-08-VolatileLoadMerge.ll
2008-07-09-SubAndError.ll
2008-07-10-CastSextBool.ll
2008-07-10-ICmpBinOp.ll
2008-07-11-RemAnd.ll
2008-07-13-DivZero.ll
2008-07-16-fsub.ll
2008-07-16-sse2_storel_dq.ll
2008-08-05-And.ll
2008-08-17-ICmpXorSignbit.ll
2008-09-02-VectorCrash.ll
2008-09-29-FoldingOr.ll Fix misoptimization of: xor i1 (icmp eq (X, C1), icmp s[lg]t (X, C2)) 2008-09-30 06:08:34 +00:00
2008-10-11-DivCompareFold.ll Fix PR2697 by rewriting the '(X / pos) op neg' logic. This also changes 2008-10-11 22:55:00 +00:00
2008-10-23-ConstFoldWithoutMask.ll Don't try to create a mask when we don't need one. Fixes a crash. 2008-10-24 06:14:27 +00:00
2008-11-01-SRemDemandedBits.ll Fix demanded bits analysis with srem by negative number. Based on a patch 2008-11-02 02:41:50 +00:00
2008-11-08-FCmp.ll If the LHS of the FCMP is coming from a UIToFP instruction, then we don't want 2008-11-09 04:26:50 +00:00
2008-11-20-DivMulRem.ll Optimize (x/y)*y into x-(x%y) in general. Div and rem are about the same, and 2008-11-21 07:33:58 +00:00
2008-11-27-IDivVector.ll Add a couple of missed optimizations on integer vectors. Multiply and divide 2008-11-27 20:21:08 +00:00
2008-11-27-MultiplyIntVec.ll Add a couple of missed optimizations on integer vectors. Multiply and divide 2008-11-27 20:21:08 +00:00
2008-11-27-UDivNegative.ll Chris prefers icmp/select over udiv! 2008-11-27 22:41:10 +00:00
2008-12-17-SRemNegConstVec.ll Make all the vector elements positive in an srem of constant vector. 2008-12-18 06:31:11 +00:00
add2.ll
add-shrink.ll
add-sitofp.ll
add.ll
addnegneg.ll
adjust-for-sminmax.ll Improve instcombine's handling of integer min and max in two ways: 2008-09-16 18:46:06 +00:00
align-2d-gep.ll
align-addr.ll
align-inc.ll
alloca.ll
and2.ll
and-compare.ll
and-fcmp.ll - Somehow I forgot about one / une. 2008-10-14 18:13:38 +00:00
and-not-or.ll simplify these patterns using m_Specific. No need to grep for 2008-12-01 05:16:26 +00:00
and-or-and.ll
and-or-not.ll
and-or.ll Implement ((A|B)&1)|(B&-2) -> (A&1) | B transformation. This also takes care of 2008-12-01 01:07:11 +00:00
and-xor-merge.ll
and.ll
apint-add1.ll
apint-add2.ll
apint-and1.ll
apint-and2.ll
apint-and-compare.ll
apint-and-or-and.ll
apint-and-xor-merge.ll
apint-call-cast-target.ll
apint-cast-and-cast.ll
apint-cast-cast-to-and.ll
apint-cast.ll
apint-div1.ll
apint-div2.ll
apint-elim-logicalops.ll
apint-mul1.ll
apint-mul2.ll
apint-not.ll
apint-or1.ll
apint-or2.ll
apint-rem1.ll
apint-rem2.ll
apint-select.ll
apint-shift-simplify.ll
apint-shift.ll
apint-shl-trunc.ll
apint-sub.ll Instcombine was illegally transforming -X/C into X/-C when either X or C 2008-11-30 03:42:12 +00:00
apint-xor1.ll
apint-xor2.ll
apint-zext1.ll
apint-zext2.ll
binop-cast.ll
bit-tracking.ll
bitcast-gep.ll
bitcast-vector-fold.ll
bitcount.ll
bittest.ll
bswap-fold.ll
bswap.ll rewrite bswap matching to be more general, allowing arbitrary 2008-10-05 02:13:19 +00:00
call2.ll
call-cast-target.ll
call-intrinsics.ll
call.ll
canonicalize_branch.ll
cast2.ll
cast_ptr.ll
cast-and-cast.ll
cast-cast-to-and.ll
cast-load-gep.ll
cast-malloc.ll
cast-mul-select.ll
cast-propagate.ll
cast-set.ll
cast.ll
CPP_min_max.ll
deadcode.ll
dg.exp
div-cmp-overflow.ll
div.ll
extractvalue.ll
fold-vector-zero.ll
fp-ret-bitcast.ll
fpcast.ll
fpextend.ll
GEPIdxCanon.ll
getelementptr_cast.ll
getelementptr_const.ll
getelementptr_index.ll
getelementptr_promote.ll On 64-bit targets, change 32-bit getelementptr indices to be 64-bit 2008-09-11 23:06:38 +00:00
getelementptr-setcc.ll
getelementptr-seteq.ll
getelementptr.ll
hoist_instr.ll
icmp.ll
IntPtrCast.ll
JavaCompare.ll
known_align.ll
load2.ll
load3.ll Teach instcombine's visitLoad to scan back several instructions 2008-10-15 23:19:35 +00:00
load.ll Teach instcombine's visitLoad to scan back several instructions 2008-10-15 23:19:35 +00:00
loadstore-alignment.ll
logical-select.ll Handle the case where there is no "not". It is possible it got 2008-11-16 04:25:26 +00:00
malloc2.ll
malloc3.ll
malloc-free-delete.ll
malloc.ll
memcpy-to-load.ll
memmove.ll
memset.ll
mul-masked-bits.ll
mul.ll
narrow.ll
not-fcmp.ll
not.ll
or2.ll
or-fcmp.ll Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible. 2008-10-14 18:44:08 +00:00
or-to-xor.ll Use m_Specific() instead of double matching. 2008-12-01 08:09:47 +00:00
or.ll
phi-merge.ll
phi.ll Teach inst combine to merge GEPs through PHIs. This is really 2008-12-01 02:34:36 +00:00
pr2645-0.ll
pr2645-1.ll
pr2996.ll Fix this recently moved code to use the correct type. CI is now a 2008-11-02 00:17:33 +00:00
preserve-sminmax.ll Improve instcombine's handling of integer min and max in two ways: 2008-09-16 18:46:06 +00:00
README.txt
rem.ll
sdiv-1.ll Strengthen check for div inst-combining. 2008-11-30 04:33:53 +00:00
sdiv-2.ll getSExtValue() doesn't work for ConstantInts with bitwidth > 64 bits. Use all 2008-11-30 12:38:24 +00:00
select.ll
set.ll
setcc-cast-cast.ll
setcc-strength-reduce.ll
sext-misc.ll
shift-simplify.ll
shift-sra.ll
shift-trunc-shift.ll
shift.ll
shl-icmp.ll
shl-trunc.ll
shufflemask-undef.ll
signext.ll
sink_instruction.ll
sitofp.ll
srem1.ll
srem-simplify-bug.ll
srem.ll
stacksaverestore.ll
store-merge.ll
store.ll
sub.ll Instcombine was illegally transforming -X/C into X/-C when either X or C 2008-11-30 03:42:12 +00:00
udiv_select_to_select_shift.ll
udiv-simplify-bug-0.ll
udiv-simplify-bug-1.ll Chris prefers icmp/select over udiv! 2008-11-27 22:41:10 +00:00
urem-simplify-bug.ll
urem.ll
vec_demanded_elts.ll
vec_extract_elt.ll
vec_insert_to_shuffle.ll
vec_insertelt.ll
vec_narrow.ll
vec_shuffle.ll
vector-srem.ll
volatile_store.ll
xor2.ll
xor-demorgans.ll Add transformation: 2009-01-01 01:18:23 +00:00
xor-undef.ll
xor.ll
zero-point-zero-add.ll
zeroext-and-reduce.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.