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llvm-project/llvm/test/Transforms/InstSimplify
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Yingwei Zheng 554feb0058
[InstSimplify] Simplify select cond, undef, val to val if val = poison implies cond = poison (#76465) 
This patch folds:
```
select cond, undef, val -> val
select cond, val, undef -> val
```
iff `impliesPoison(val, cond)` returns true.

Example:
```
define i32 @src1(i32 %retval.0.i.i) {
  %cmp.i = icmp sgt i32 %retval.0.i.i, -1
  %spec.select.i = select i1 %cmp.i, i32 %retval.0.i.i, i32 undef
  ret i32 %spec.select.i
}

define i32 @tgt1(i32 %retval.0.i.i) {
  ret i32 %retval.0.i.i
}
```
Alive2: https://alive2.llvm.org/ce/z/okJW3G

Compile-time impact:
http://llvm-compile-time-tracker.com/compare.php?from=38c9390b59c4d2b9181614d6a909887497d3692f&to=e146f51ba278aa3bb6879a9ec651831ac8938e91&stat=instructions%3Au
2023-12-28 23:37:19 +08:00
..
ConstProp
[IR] Remove support for lshr/ashr constant expressions (#71955)
2023-11-14 09:25:14 +01:00
X86
Recommit [FPEnv][InstSimplify] Correct strictfp tests.
2023-08-03 09:44:50 -04:00
2010-12-20-Boolean.ll
…
2011-01-14-Thread.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
2011-02-01-Vector.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
2011-09-05-InsertExtractValue.ll
[InstSimplify] Fix poison safety in insertvalue fold
2023-02-16 09:39:44 +01:00
2011-10-27-BinOpCrash.ll
[IR] Remove support for lshr/ashr constant expressions (#71955)
2023-11-14 09:25:14 +01:00
2011-11-23-MaskedBitsCrash.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
2013-04-19-ConstantFoldingCrash.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
abs_intrinsic.ll
[ValueTracking] Fix i1 abs range (PR62760)
2023-05-17 12:31:13 +02:00
add_vp.ll
[NFC] Port all InstSimplify tests to -passes= syntax
2022-12-08 02:38:45 +03:00
add-mask.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
add.ll
…
addsub.ll
…
and-icmps-same-ops.ll
[InstSimplify] use isImpliedCondition() instead of semi-duplicated code
2022-08-05 10:59:09 -04:00
and-or-icmp-ctpop.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
and-or-icmp-min-max.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
and-or-icmp-nullptr.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
and-or-icmp-zero.ll
[InstCombine] Add pre-commit tests for PR66606. NFC.
2023-09-19 11:13:16 +08:00
and-or-implied-cond.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
and.ll
…
AndOrXor.ll
[InstSimplify] Avoid use of ConstantExpr::getCast()
2023-09-29 10:23:40 +02:00
assume_icmp.ll
…
assume-fcmp-constant-implies-class.ll
Revert "Reapply "ValueTracking: Identify implied fp classes by general fcmp (#66505)""
2023-12-05 11:10:24 +01:00
assume-non-zero.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
bitcast-vector-fold.ll
…
bitreverse-fold.ll
…
bitreverse.ll
…
bswap.ll
…
call.ll
[ValueTracking] Fix i1 abs range (PR62760)
2023-05-17 12:31:13 +02:00
canonicalize.ll
ConstantFolding: Constant fold denormal inputs to canonicalize for IEEE
2023-07-24 19:49:06 -04:00
cast-unsigned-icmp-cmp-0.ll
…
cast.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
cmp_ext.ll
…
cmp_of_min_max.ll
…
cmp-alloca-offsets.ll
[InstSimplify] Fold icmp of allocas based on offset difference
2023-06-29 09:16:26 +02:00
cmp-vec-fast-path.ll
[IRBuilder] Use canonical i64 type for insertelement index used by vector splats.
2023-01-11 14:08:06 +00:00
compare.ll
[InstSimplify] Fold icmp of X and/or C1 and X and/or C2 into constant (#65905)
2023-09-18 21:32:48 +08:00
constant-fold-fp-denormal.ll
LangRef: Add "dynamic" option to "denormal-fp-math"
2023-04-29 08:44:59 -04:00
constantfold-add-nuw-allones-to-allones.ll
…
constantfold-shl-nuw-C-to-C.ll
…
constfold-constrained.ll
[ConstantFolding] Fix folding of constrained compare intrinsics
2022-02-27 10:19:19 +07:00
ctpop-pow2.ll
[ValueTracking] Do more thorough non-zero check in isKnownToBePowerOfTwo when OrZero is no set.
2023-10-12 16:05:19 -05:00
dead-code-removal.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
distribute.ll
…
div-by-0-guard-before-smul_ov-not.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
div-by-0-guard-before-smul_ov.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
div-by-0-guard-before-umul_ov-not.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
div-by-0-guard-before-umul_ov.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
div.ll
[InstSimplify] Fold u/sdiv exact (mul nsw/nuw X, C), C --> X when C is not a power of 2 (#76445)
2023-12-28 17:36:25 +08:00
domcondition.ll
[InstSimplify] Precommit tests for dominate conditions are not single predecessor; NFC
2023-04-15 16:12:31 +08:00
exact-nsw-nuw.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
exp10.ll
ConstantFolding: Handle exp10 intrinsic
2023-09-02 09:20:51 -04:00
extract-element.ll
…
extract-vector.ll
[IR] Move vector.insert/vector.extract out of experimental namespace
2022-06-27 10:48:45 +00:00
fast-math-strictfp.ll
Recommit [FPEnv][InstSimplify] Correct strictfp tests.
2023-08-03 09:44:50 -04:00
fast-math.ll
…
fcmp-select.ll
…
fcmp.ll
…
fdiv-strictfp.ll
…
fdiv.ll
InstSimplify: Fold fdiv nnan ninf x, 0 -> poison
2022-11-07 08:43:22 -08:00
floating-point-arithmetic-strictfp.ll
Recommit [FPEnv][InstSimplify] Correct strictfp tests.
2023-08-03 09:44:50 -04:00
floating-point-arithmetic.ll
InstSimplify: Combine computeKnownFPClass calls and pass AssumptionCache
2023-05-18 23:29:47 +01:00
floating-point-compare.ll
ValueTracking: Add baseline tests for fcmp with non-0/inf constants
2023-09-11 20:03:03 +03:00
fminmax-folds.ll
[InstSimplify] Extend handlng of fp min/max.
2023-04-27 10:45:27 +07:00
fold-intrinsics.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
fold-vscale.ll
…
fp-nan.ll
[InstSimplify] Fix a scalable-vector crash
2023-06-28 17:07:10 +01:00
fp-undef-poison-strictfp.ll
Recommit [FPEnv][InstSimplify] Correct strictfp tests.
2023-08-03 09:44:50 -04:00
fp-undef-poison.ll
[InstSimplify] add test for fsub with inf operand; NFC
2022-11-11 09:17:20 -05:00
fptoi-range.ll
…
fptoi-sat.ll
…
freeze-noundef.ll
[IR] Support or disjoint in hasPoisonGeneratingFlags()
2023-11-30 17:26:23 +01:00
freeze.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
frexp.ll
InstSimplify: Handle basic folds for frexp
2023-07-17 17:28:01 -04:00
gc_relocate.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
gep.ll
[IR] Enable load/store/alloca for arrays of scalable vectors.
2023-09-14 13:49:01 +00:00
gv-alloca-cmp.ll
[InstSimplify] Fold all global variables with initializers
2023-07-03 15:11:41 -06:00
icmp-abs-nabs.ll
…
icmp-bool-constant.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
icmp-constant.ll
…
icmp-not-bool-constant.ll
…
icmp-ranges.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
icmp.ll
[ValueTracking] Dereferenceable and !NullPointerIsDefined imply non-zero
2023-08-14 11:42:21 +08:00
implies.ll
[ValueTracking] Infer X u<= X +nuw Y for any Y (#75524)
2023-12-15 16:33:39 +08:00
insert-vector.ll
[IR] Move vector.insert/vector.extract out of experimental namespace
2022-06-27 10:48:45 +00:00
insertelement.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
insertvalue.ll
[InstSimplify] Fix poison safety in insertvalue fold
2023-02-16 09:39:44 +01:00
invalid-load-operand-infinite-loop.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
invariant.group-load.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
is_fpclass.ll
[Vectorize] Fix vectorization, scalarization and folding of llvm.is.fpclass
2023-04-24 13:42:08 +01:00
known-never-infinity.ll
ValueTracking: Add some tests to cover asserts in fcmpImpliesClass
2023-11-13 15:05:52 +09:00
known-never-nan.ll
Revert "Revert "ValueTracking: Fix nan result handling for fmul""
2023-06-16 13:53:32 -07:00
known-non-zero-opaque-ptrs.ll
[llvm] Remove explicit -opaque-pointers flag from tests (NFC)
2023-07-12 14:35:55 +02:00
known-non-zero.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
ldexp.ll
InstSimplify: Simplifications for ldexp
2023-09-13 08:38:48 +03:00
load-relative-32.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
load-relative.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
load.ll
[AggressiveInstCombine] Pre-Commit test for D144445 (NFC)
2023-03-23 23:31:22 +09:00
log2-pow2-intrinsic.ll
…
log10-pow10-intrinsic.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
log-exp-intrinsic.ll
InstSimplify: Handle exp10(log10(x)) -> x
2023-09-02 09:21:47 -04:00
logic-of-fcmps.ll
InstSimplify: Pass AssumptionCache through more isKnownNeverNaN queries
2023-05-19 00:48:03 +01:00
maxmin_intrinsics.ll
[InstSimplify] Fold icmp of X and/or C1 and X and/or C2 into constant (#65905)
2023-09-18 21:32:48 +08:00
maxmin.ll
…
mul.ll
[InstSimplify] reduce "mul nsw i1" to "false"
2023-01-18 13:51:40 -05:00
named-vector-shuffle-reverse.ll
[NFC] Port all InstSimplify tests to -passes= syntax
2022-12-08 02:38:45 +03:00
negate.ll
…
noalias-ptr.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
null-ptr-is-valid-attribute.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
null-ptr-is-valid.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
opaque-ptr.ll
[llvm] Remove explicit -opaque-pointers flag from tests (NFC)
2023-07-12 14:35:55 +02:00
or-icmps-same-ops.ll
[InstSimplify] use isImpliedCondition() instead of semi-duplicated code
2022-08-05 10:59:09 -04:00
or.ll
[InstSimplify] (~A & B) | ~(A | B) --> ~A with logical and
2022-11-07 10:03:18 +00:00
past-the-end.ll
[InstSimplify] Fold icmp of allocas based on offset difference
2023-06-29 09:16:26 +02:00
phi-cse.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
phi.ll
[InstSimplify] Adjust context instruction when threading phi (PR61312)
2023-03-10 10:34:27 +01:00
po2-shift-add-and-to-zero.ll
[InstSimplify] Fold converted urem to 0 if there's no overlapping bits (#71528)
2023-11-20 10:27:16 +00:00
pr28725.ll
[ConstExpr] Remove select constant expression
2023-03-16 10:32:08 +01:00
pr33957.ll
[NFC] Port all InstSimplify tests to -passes= syntax
2022-12-08 02:38:45 +03:00
pr49495.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
ptr_diff.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
ptrmask.ll
[InstSimplify] Add some basic simplifications for llvm.ptrmask
2023-11-01 23:50:35 -05:00
reassociate.ll
…
redundant-null-check-in-uadd_with_overflow-of-nonnull-ptr.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
rem.ll
…
require-dominator.ll
[Tests] Remove unnecessary bitcasts from opaque pointer tests (NFC)
2022-06-22 14:15:46 +02:00
result-of-add-of-negative-is-non-zero-and-no-underflow.ll
Reapply [InstCombine] Simplify and/or of icmp eq with op replacement (#70335)
2023-11-03 10:16:15 +01:00
result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
result-of-usub-is-non-zero-and-no-overflow.ll
…
returned.ll
[ValueTracking] Handle returned attribute with mismatched type
2023-12-08 17:05:13 +01:00
round-intrinsics.ll
[InstSimplify] fold FP rounding intrinsic with rounded operand
2022-07-31 10:00:27 -04:00
saturating-add-sub.ll
[InstSimplify] Fold icmp of uadd.sat/usub.sat (PR63381)
2023-06-19 11:49:38 +02:00
sdiv.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
select_or_and.ll
[InstSimplify] with logical ops: (X & Y) == -1 ? X : -1 --> -1
2023-04-26 15:53:02 +08:00
select-abs.ll
[InstSimplify] Fold (a != 0) ? abs(a) : 0 (#70305)
2023-10-27 14:52:09 +02:00
select-and-cmp.ll
…
select-implied.ll
[InstCombine] Improvement the analytics through the dominating condition
2023-03-01 17:03:34 +08:00
select-inseltpoison.ll
[InstSimplify] Simplify select cond, undef, val to val if val = poison implies cond = poison (#76465)
2023-12-28 23:37:19 +08:00
select-logical.ll
[InstSimplify] !(X && Y) || X --> true (for poison-safe logical ops)
2023-01-29 10:24:52 -05:00
select-maxmin.ll
Reapply [InstSimplify] Support all instructions in simplifyWithOpReplaced()
2023-04-25 15:45:32 +02:00
select-or-cmp.ll
…
select.ll
[InstSimplify] Simplify select cond, undef, val to val if val = poison implies cond = poison (#76465)
2023-12-28 23:37:19 +08:00
shift-128-kb.ll
…
shift-knownbits.ll
…
shift.ll
[InstSimplify] Simplify (shl nsw nuw X, BitWidth - 1) -> 0
2023-03-06 20:29:53 -06:00
shr-nop.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
shr-scalar-vector-consistency.ll
…
shufflevector-inseltpoison.ll
[InstSimplify] Update to handle new shufflevector semantics
2023-05-03 21:31:19 +01:00
shufflevector.ll
[InstSimplify] Update to handle new shufflevector semantics
2023-05-03 21:31:19 +01:00
signed-div-rem.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
simplify-nested-bitcast.ll
[NFC] Port all InstSimplify tests to -passes= syntax
2022-12-08 02:38:45 +03:00
smul_fix.ll
…
srem.ll
…
strictfp-fadd.ll
[InstSimplify] fix/improve folding with an SNaN vector element operand
2023-02-14 19:10:56 -05:00
strictfp-fsub.ll
Recommit [FPEnv][InstSimplify] Correct strictfp tests.
2023-08-03 09:44:50 -04:00
strictfp-sqrt-nonneg.ll
ValueTracking: Drop rounding mode check for constrained_sqrt in CannotBeNegativeZero
2023-05-22 10:49:10 +01:00
sub.ll
…
undef.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
vec-cmp.ll
[NFCI] Regenerate instsimplify test checks
2022-04-03 20:55:15 +02:00
vec-icmp-of-cast.ll
[InstSimplify] Extend simplifications for (icmp ({z|s}ext X), C) where C is vector
2023-04-03 11:04:57 -05:00
vector_gep.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
vector_ptr_bitcast.ll
[InstSimplify] Convert tests to opaque pointers (NFC)
2022-06-10 17:16:28 +02:00
vector-inseltextelt.ll
[instsimplify] Move (extelt (inselt Vec, Value, Index), Index) -> Value from InstCombine
2022-10-17 15:22:06 -07:00
vscale-inseltpoison.ll
[LLVM] Remove support for constant scalable vector GEPs.
2023-03-14 16:48:33 +00:00
vscale.ll
[LLVM] Remove support for constant scalable vector GEPs.
2023-03-14 16:48:33 +00:00
xor.ll
…