llvm-6502/test/Transforms/InstCombine
Duncan Sands 1845009290 In which I discover the existence of loops. Threading an operation
over a phi node by applying it to each operand may be wrong if the
operation and the phi node are mutually interdependent (the testcase
has a simple example of this).  So only do this transform if it would
be correct to perform the operation in each predecessor of the block
containing the phi, i.e. if the other operands all dominate the phi.
This should fix the FFMPEG snow.c regression reported by İsmail Dönmez.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119347 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-16 12:16:38 +00:00
..
2002-03-11-InstCombineHang.ll
2002-05-14-SubFailure.ll
2002-08-02-CastTest.ll
2002-12-05-MissedConstProp.ll
2003-05-26-CastMiscompile.ll
2003-05-27-ConstExprCrash.ll
2003-06-05-BranchInvertInfLoop.ll
2003-07-21-ExternalConstant.ll
2003-08-12-AllocaNonNull.ll
2003-09-09-VolatileLoadElim.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-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
2006-02-13-DemandedMiscompile.ll
2006-02-28-Crash.ll
2006-03-30-ExtractElement.ll
2006-04-28-ShiftShiftLongLong.ll
2006-05-04-DemandedBitCrash.ll
2006-09-15-CastToBool.ll
2006-10-19-SignedToUnsignedCastAndConst-2.ll
2006-10-20-mask.ll
2006-10-26-VectorReassoc.ll
2006-11-03-Memmove64.ll
2006-11-10-ashr-miscompile.ll
2006-12-01-BadFPVectorXform.ll
2006-12-05-fp-to-int-ext.ll
2006-12-08-Phi-ICmp-Op-Fold.ll
2006-12-08-Select-ICmp.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
2007-04-04-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
2007-09-10-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-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 add newlines at the end of files. 2010-04-07 22:53:17 +00:00
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
2008-02-13-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
2008-10-11-DivCompareFold.ll
2008-10-23-ConstFoldWithoutMask.ll
2008-11-01-SRemDemandedBits.ll
2008-11-08-FCmp.ll
2008-11-20-DivMulRem.ll
2008-11-27-IDivVector.ll
2008-11-27-MultiplyIntVec.ll
2008-11-27-UDivNegative.ll
2008-12-17-SRemNegConstVec.ll
2009-01-05-i128-crash.ll
2009-01-08-AlignAlloca.ll
2009-01-16-PointerAddrSpace.ll
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
2009-01-24-EmptyStruct.ll
2009-01-31-InfIterate.ll
2009-01-31-Pressure.ll
2009-02-04-FPBitcast.ll
2009-02-20-InstCombine-SROA.ll
2009-02-21-LoadCST.ll
2009-02-25-CrashZeroSizeArray.ll
2009-03-18-vector-ashr-crash.ll
2009-03-20-AShrOverShift.ll
2009-03-24-InfLoop.ll
2009-04-07-MulPromoteToI96.ll
2009-05-23-FCmpToICmp.ll
2009-06-11-StoreAddrSpace.ll
2009-06-16-SRemDemandedBits.ll
2009-07-02-MaskedIntVector.ll
2009-12-17-CmpSelectNull.ll
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 When folding away a (shl (shr)) pair, we need to check that the bits that will BECOME the low 2010-11-01 21:08:20 +00:00
add2.ll
add3.ll
add-shrink.ll
add-sitofp.ll
add.ll
addnegneg.ll
adjust-for-sminmax.ll
align-2d-gep.ll
align-addr.ll Make instcombine set explicit alignments on load or store 2010-08-03 18:20:32 +00:00
align-external.ll
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
and-fcmp.ll
and-not-or.ll
and-or-and.ll
and-or-not.ll
and-or.ll
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-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 change the preferred canonical form for a sign extension to be 2010-01-10 07:08:30 +00:00
apint-shl-trunc.ll
apint-sub.ll
apint-xor1.ll
apint-xor2.ll
apint-zext1.ll
apint-zext2.ll
ashr-nop.ll
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
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
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
bitcast-vector-fold.ll
bitcast.ll handle the constant case of vector insertion. For something 2010-08-28 01:50:57 +00:00
bitcount.ll
bittest.ll
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
call-cast-target.ll
call-intrinsics.ll
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
cast-set.ll
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
constant-fold-compare.ll
constant-fold-gep.ll
CPP_min_max.ll
crash.ll Add a reduced testcase for the infinite loop fixed in r113763. 2010-09-13 18:28:40 +00:00
dce-iterate.ll
deadcode.ll
dg.exp
div-cmp-overflow.ll
div.ll
enforce-known-alignment.ll
exact-sdiv.ll
extractvalue.ll
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
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
fp-ret-bitcast.ll
fpcast.ll
fpextend.ll
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
icmp.ll Constant fold x == undef to undef. 2010-06-28 21:30:07 +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
intrinsics.ll PR7853: fix a silly mistake introduced in r101899, and add a test to make sure 2010-08-09 20:49:43 +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
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
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
malloc2.ll
malloc3.ll
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
memcpy-to-load.ll
memcpy.ll fix PR8267 - Instcombine shouldn't optimizer away volatile memcpy's. 2010-10-01 05:51:02 +00:00
memmove.ll
memset_chk.ll Reapply address space patch after fixing an issue in MemCopyOptimizer. 2010-04-04 03:10:48 +00:00
memset.ll
mul-masked-bits.ll
mul.ll
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
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
not-fcmp.ll
not.ll
nothrow.ll
nsw.ll
objsize.ll Fix declarations in a few more tests. 2010-04-17 21:29:25 +00:00
odr-linkage.ll add newlines at the end of files. 2010-04-07 22:53:17 +00:00
or-fcmp.ll
or-to-xor.ll
or.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
phi-merge-gep.ll
phi.ll In which I discover the existence of loops. Threading an operation 2010-11-16 12:16:38 +00:00
pr2645-0.ll
pr2645-1.ll
pr2996.ll
pr8547.ll When checking that the necessary bits are zero in 2010-11-10 01:30:56 +00:00
preserve-sminmax.ll
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
rem.ll
sdiv-1.ll
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 Move PHI tests to phi.ll, out of select.ll. 2010-11-15 16:43:28 +00:00
set.ll
setcc-strength-reduce.ll
sext.ll
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 tidy up test. 2010-08-27 23:15:21 +00:00
shufflemask-undef.ll
shufflevec-constant.ll
signed-comparison.ll
signext.ll Simplify/generalize the xor+add->sign-extend instcombine. 2010-01-31 04:29:12 +00:00
simplify-demanded-bits-pointer.ll
sink_instruction.ll
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
srem.ll
stack-overalign.ll
stacksaverestore.ll
store.ll
strcpy_chk.ll Verify function prototypes before trying to optimize functions. We also 2010-04-12 04:48:00 +00:00
sub.ll Add a small transform: transform -(X<<Y) to (-X<<Y) when the shift has a single 2010-01-31 02:30:23 +00:00
trunc.ll teach the truncation optimization that an entire chain of 2010-08-27 20:32:06 +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-2.ll
vec_demanded_elts-3.ll
vec_demanded_elts.ll
vec_extract_elt.ll
vec_insertelt.ll
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_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
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

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.