Nikita Popov 2f31020aa4 [InstSimplify] Don't fold gep p, -p to null ... This is a partial fix for https://bugs.llvm.org/show_bug.cgi?id=44403. Folding gep p, q-p to q is only legal if p and q have the same provenance. This fold should probably be guarded by something like getUnderlyingObject(p) == getUnderlyingObject(q). This patch is a partial fix that removes the special handling for gep p, 0-p, which will fold to a null pointer, which would certainly not pass an underlying object check (unless p is also null, in which case this would fold trivially anyway). Folding to a null pointer is particularly problematic due to the special handling it receives in many places, making end-to-end miscompiles more likely. Differential Revision: https://reviews.llvm.org/D93820		2021-01-12 20:24:23 +01:00
..
ConstProp	[ConstProp] Constant propagation for get.active.lane.mask instrinsics	2021-01-08 16:10:01 +00:00
2010-12-20-Boolean.ll
2011-01-14-Thread.ll
2011-02-01-Vector.ll
2011-09-05-InsertExtractValue.ll	[InstSimplify] Return poison for out of bounds extractelement	2021-01-03 18:15:58 +01:00
2011-10-27-BinOpCrash.ll
2011-11-23-MaskedBitsCrash.ll
2013-04-19-ConstantFoldingCrash.ll
abs_intrinsic.ll	[InstSimplify] Don't miscompile X == 0 ? abs(X) : -abs(X) --> -abs(X) xform	2020-12-18 21:18:13 +03:00
add-mask.ll
add.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
addsub.ll
and-icmps-same-ops.ll
and-or-icmp-min-max.ll	[InstSimplify] peek through 'not' operand in logic-of-icmps fold	2020-10-25 11:13:30 -04:00
and-or-icmp-nullptr.ll
and-or-icmp-zero.ll
and.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
AndOrXor.ll	[InstSimplify] reduce logic with inverted add/sub ops	2020-12-21 08:51:43 -05:00
assume_icmp.ll
assume-non-zero.ll
bitcast-vector-fold.ll
bitreverse-fold.ll
bitreverse.ll
bswap.ll
call.ll	[InstSimplify] Fold call null/undef to poison	2021-01-06 21:09:30 +01:00
cast-unsigned-icmp-cmp-0.ll
cast.ll
cmp_ext.ll
cmp_of_min_max.ll
cmp-vec-fast-path.ll	[SVE] Take constant fold fast path for splatted vscale vectors	2020-11-17 12:45:31 -08:00
compare.ll	[InstSimplify] allow vector folds for (Pow2C << X) == NonPow2C	2020-11-08 09:52:05 -05:00
constantfold-add-nuw-allones-to-allones.ll
constantfold-shl-nuw-C-to-C.ll
constfold-constrained.ll
dead-code-removal.ll
distribute.ll
div-by-0-guard-before-smul_ov-not.ll
div-by-0-guard-before-smul_ov.ll
div-by-0-guard-before-umul_ov-not.ll
div-by-0-guard-before-umul_ov.ll
div.ll	[InstSimplify] Fold division by zero to poison	2021-01-03 20:52:45 +01:00
exact-nsw-nuw.ll
extract-element.ll	[InstSimplify] Return poison for out of bounds extractelement	2021-01-03 18:15:58 +01:00
fast-math.ll
fcmp-select.ll
fcmp.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
fdiv.ll
floating-point-arithmetic.ll	[InstSimplify] add/move tests for fmin/fmax; NFC	2020-09-14 10:24:19 -04:00
floating-point-compare.ll	[ValueTracking] enhance isKnownNeverInfinity to understand sitofp	2020-09-27 08:40:31 -04:00
fminmax-folds.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
fold-intrinsics.ll
fp-nan.ll	[InstSimplify] Fold nnan/ninf violation to poison	2021-01-03 22:05:40 +01:00
fp-undef-poison.ll	[InstSimplify] Fold nnan/ninf violation to poison	2021-01-03 22:05:40 +01:00
fptoi-sat.ll	[ConstantFold] Fold fptoi.sat intrinsics	2021-01-10 17:37:27 +01:00
freeze-noundef.ll	Add support for !noundef metatdata on loads	2020-10-17 13:50:10 +09:00
freeze.ll
gep.ll	[InstSimplify] Don't fold gep p, -p to null	2021-01-12 20:24:23 +01:00
icmp-abs-nabs.ll
icmp-bool-constant.ll
icmp-constant.ll
icmp-ranges.ll
icmp.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
implies.ll
insertelement.ll	[InstSimplify] Fold insertelement vec, poison, idx into vec	2021-01-07 10:10:14 +09:00
insertvalue.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
known-never-nan.ll
known-non-zero.ll	[ValueTracking] isKnownNonZero, computeKnownBits for freeze	2020-09-10 08:07:38 +09:00
load-relative-32.ll
load-relative.ll
load.ll
log2-pow2-intrinsic.ll
log10-pow10-intrinsic.ll
log-exp-intrinsic.ll
logic-of-fcmps.ll
maxmin_intrinsics.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
maxmin.ll
mul.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
negate.ll
noalias-ptr.ll
null-ptr-is-valid-attribute.ll
null-ptr-is-valid.ll
or-icmps-same-ops.ll
or.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
past-the-end.ll
phi-cse.ll	[NFC][InstSimplify] Add a note to PHI CSE tests that they are all negative tests	2020-08-29 13:13:06 +03:00
phi.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
pr28725.ll
pr33957.ll
ptr_diff.ll
reassociate.ll
redundant-null-check-in-uadd_with_overflow-of-nonnull-ptr.ll
rem.ll	[InstSimplify] Fold division by zero to poison	2021-01-03 20:52:45 +01:00
remove-dead-call.ll	[NewPM] Pin tests with -debug-pass to legacy PM	2020-09-22 17:54:25 -07:00
require-dominator.ll
result-of-add-of-negative-is-non-zero-and-no-underflow.ll
result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll
result-of-usub-is-non-zero-and-no-overflow.ll
returned.ll
round-intrinsics.ll
saturating-add-sub.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
sdiv.ll
select-and-cmp.ll
select-implied.ll
select-inseltpoison.ll	Precommit transform tests that have poison as insertelement's placeholder	2020-12-24 11:46:17 +09:00
select-or-cmp.ll
select.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
shift-128-kb.ll
shift-knownbits.ll	[InstSimplify] Fold out-of-bounds shift to poison	2021-01-06 20:41:37 +01:00
shift.ll	[InstSimplify] Fold out-of-bounds shift to poison	2021-01-06 20:41:37 +01:00
shr-nop.ll
shr-scalar-vector-consistency.ll
shufflevector-inseltpoison.ll	Precommit tests that have poison as shufflevector's placeholder	2020-12-29 17:09:31 +09:00
shufflevector.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
signed-div-rem.ll
simplify-nested-bitcast.ll
srem.ll
sub.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00
undef.ll	[InstSimplify] Fold call null/undef to poison	2021-01-06 21:09:30 +01:00
vec-cmp.ll
vector_gep.ll
vector_ptr_bitcast.ll
vscale-inseltpoison.ll	[InstSimplify] Return poison for out of bounds extractelement	2021-01-03 18:15:58 +01:00
vscale.ll	[InstSimplify] Return poison for out of bounds extractelement	2021-01-03 18:15:58 +01:00
xor.ll	[InstSimplify] Add tests that fold instructions with poison operands (NFC)	2020-12-02 01:01:59 +09:00