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Aug 22, 2025
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[LoopDist] Add metadata for checking post process state of distribute… #153902

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[LoopDist] Add metadata for checking post process state of distribute…
mcberg2021 Aug 15, 2025
779aae4
Merge branch 'main' into users/mcberg2021_LoopDistribute2
mcberg2021 Aug 21, 2025
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7 changes: 7 additions & 0 deletions llvm/docs/LangRef.rst
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Expand Up @@ -7828,6 +7828,13 @@ The attributes in this metadata are added to all followup loops of the
loop distribution pass. See
:ref:`Transformation Metadata <transformation-metadata>` for details.

'``llvm.loop.isdistributed``' Metadata
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

If a loop was successfully processed by the loop distribution pass,
this metadata is added (i.e. has been distributed). See
:ref:`Transformation Metadata <transformation-metadata>` for details.

'``llvm.licm.disable``' Metadata
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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12 changes: 12 additions & 0 deletions llvm/docs/TransformMetadata.rst
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Expand Up @@ -346,6 +346,18 @@ It is recommended to add ``llvm.loop.disable_nonforced`` to
fallback version (which is likely never executed) is further optimized
which would increase the code size.

Attributes defined in ``llvm.loop.isdistributed`` are added to successfully
distributed loops to prevent subsequent reprocessing.

As an example, the following instructs a loop to be ignored during
loop distribution.

.. code-block:: llvm
!4 = distinct !{!4, !5, !6}
!5 = !{!"llvm.loop.mustprogress"}
!6 = !{!"llvm.loop.isdistributed", i32 1}
Versioning LICM
---------------

Expand Down
11 changes: 11 additions & 0 deletions llvm/lib/Transforms/Scalar/LoopDistribute.cpp
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Expand Up @@ -113,6 +113,8 @@ static cl::opt<bool> EnableLoopDistribute(
cl::desc("Enable the new, experimental LoopDistribution Pass"),
cl::init(false));

static const char *DistributedMetaData = "llvm.loop.isdistributed";

STATISTIC(NumLoopsDistributed, "Number of loops distributed");

namespace {
Expand Down Expand Up @@ -826,6 +828,8 @@ class LoopDistributeForLoop {
{LLVMLoopDistributeFollowupAll, LLVMLoopDistributeFollowupFallback},
"llvm.loop.distribute.", true);
LVer.getNonVersionedLoop()->setLoopID(UnversionedLoopID);
addStringMetadataToLoop(LVer.getNonVersionedLoop(), DistributedMetaData,
true);
}

// Create identical copies of the original loop for each partition and hook
Expand Down Expand Up @@ -986,6 +990,13 @@ static bool runImpl(Function &F, LoopInfo *LI, DominatorTree *DT,
for (Loop *L : Worklist) {
LoopDistributeForLoop LDL(L, &F, LI, DT, SE, LAIs, ORE);

// Do not reprocess loops we already distributed
if (getOptionalBoolLoopAttribute(L, DistributedMetaData).value_or(false)) {
LLVM_DEBUG(
dbgs() << "LDist: Distributed loop guarded for reprocessing\n");
continue;
}

// If distribution was forced for the specific loop to be
// enabled/disabled, follow that. Otherwise use the global flag.
if (LDL.isForced().value_or(EnableLoopDistribute))
Expand Down
39 changes: 20 additions & 19 deletions llvm/test/Transforms/LoopDistribute/cross-partition-access.ll
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Expand Up @@ -64,30 +64,30 @@ define dso_local void @_Z13distribution3PiS_S_S_i(ptr nocapture noundef %a, ptr
; CHECK: [[FOR_BODY_LDIST1]]:
; CHECK-NEXT: [[IDXPROM_LDIST1:%.*]] = phi i64 [ 0, %[[FOR_BODY_PH_LDIST1]] ], [ [[I6_LDIST1:%.*]], %[[FOR_BODY_LDIST1]] ]
; CHECK-NEXT: [[ARRAYIDX_LDIST1:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[IDXPROM_LDIST1]]
; CHECK-NEXT: [[I2_LDIST1:%.*]] = load i32, ptr [[ARRAYIDX_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META6:![0-9]+]]
; CHECK-NEXT: [[I2_LDIST1:%.*]] = load i32, ptr [[ARRAYIDX_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META7:![0-9]+]]
; CHECK-NEXT: [[ADD4_LDIST1:%.*]] = add nsw i32 [[I2_LDIST1]], 1
; CHECK-NEXT: [[ARRAYIDX8_LDIST1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IDXPROM_LDIST1]]
; CHECK-NEXT: store i32 [[ADD4_LDIST1]], ptr [[ARRAYIDX8_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META9:![0-9]+]], !noalias [[META11:![0-9]+]]
; CHECK-NEXT: store i32 [[ADD4_LDIST1]], ptr [[ARRAYIDX8_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META10:![0-9]+]], !noalias [[META12:![0-9]+]]
; CHECK-NEXT: [[I3_LDIST1:%.*]] = getelementptr i32, ptr [[C]], i64 [[IDXPROM_LDIST1]]
; CHECK-NEXT: [[ARRAYIDX17_LDIST1:%.*]] = getelementptr i8, ptr [[I3_LDIST1]], i64 -4
; CHECK-NEXT: [[I4_LDIST1:%.*]] = load i32, ptr [[ARRAYIDX17_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META14:![0-9]+]], !noalias [[META15:![0-9]+]]
; CHECK-NEXT: [[I4_LDIST1:%.*]] = load i32, ptr [[ARRAYIDX17_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META15:![0-9]+]], !noalias [[META16:![0-9]+]]
; CHECK-NEXT: [[SUB18_LDIST1:%.*]] = sub nsw i32 [[ADD4_LDIST1]], [[I4_LDIST1]]
; CHECK-NEXT: store i32 [[SUB18_LDIST1]], ptr [[I3_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META14]], !noalias [[META15]]
; CHECK-NEXT: store i32 [[SUB18_LDIST1]], ptr [[I3_LDIST1]], align 4, !tbaa [[TBAA0]], !alias.scope [[META15]], !noalias [[META16]]
; CHECK-NEXT: [[I6_LDIST1]] = add i64 [[IDXPROM_LDIST1]], 1
; CHECK-NEXT: [[CMP1_NOT_LDIST1:%.*]] = icmp eq i64 [[I6_LDIST1]], [[LEN]]
; CHECK-NEXT: br i1 [[CMP1_NOT_LDIST1]], label %[[FOR_BODY_PH:.*]], label %[[FOR_BODY_LDIST1]], !llvm.loop [[LOOP16:![0-9]+]]
; CHECK-NEXT: br i1 [[CMP1_NOT_LDIST1]], label %[[FOR_BODY_PH:.*]], label %[[FOR_BODY_LDIST1]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK: [[FOR_BODY_PH]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[IDXPROM:%.*]] = phi i64 [ 0, %[[FOR_BODY_PH]] ], [ [[I6:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX8:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IDXPROM]]
; CHECK-NEXT: [[I5:%.*]] = load i32, ptr [[ARRAYIDX8]], align 4, !tbaa [[TBAA0]], !alias.scope [[META9]], !noalias [[META11]]
; CHECK-NEXT: [[I5:%.*]] = load i32, ptr [[ARRAYIDX8]], align 4, !tbaa [[TBAA0]], !alias.scope [[META10]], !noalias [[META12]]
; CHECK-NEXT: [[ADD27:%.*]] = add nsw i32 [[I5]], 2
; CHECK-NEXT: [[ARRAYIDX31:%.*]] = getelementptr inbounds i32, ptr [[D]], i64 [[IDXPROM]]
; CHECK-NEXT: store i32 [[ADD27]], ptr [[ARRAYIDX31]], align 4, !tbaa [[TBAA0]], !alias.scope [[META15]], !noalias [[META6]]
; CHECK-NEXT: store i32 [[ADD27]], ptr [[ARRAYIDX31]], align 4, !tbaa [[TBAA0]], !alias.scope [[META16]], !noalias [[META7]]
; CHECK-NEXT: [[I6]] = add i64 [[IDXPROM]], 1
; CHECK-NEXT: [[CMP1_NOT:%.*]] = icmp eq i64 [[I6]], [[LEN]]
; CHECK-NEXT: br i1 [[CMP1_NOT]], label %[[END_LOOPEXIT_LOOPEXIT20:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP16]]
; CHECK-NEXT: br i1 [[CMP1_NOT]], label %[[END_LOOPEXIT_LOOPEXIT20:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP17]]
; CHECK: [[END_LOOPEXIT_LOOPEXIT]]:
; CHECK-NEXT: br label %[[END_LOOPEXIT:.*]]
; CHECK: [[END_LOOPEXIT_LOOPEXIT20]]:
Expand Down Expand Up @@ -143,17 +143,18 @@ end: ; preds = %end.loopexit, %entr
; CHECK: [[META1]] = !{!"int", [[META2:![0-9]+]], i64 0}
; CHECK: [[META2]] = !{!"omnipotent char", [[META3:![0-9]+]], i64 0}
; CHECK: [[META3]] = !{!"Simple C++ TBAA"}
; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META5:![0-9]+]]}
; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META5:![0-9]+]], [[META6:![0-9]+]]}
; CHECK: [[META5]] = !{!"llvm.loop.mustprogress"}
; CHECK: [[META6]] = !{[[META7:![0-9]+]]}
; CHECK: [[META7]] = distinct !{[[META7]], [[META8:![0-9]+]]}
; CHECK: [[META8]] = distinct !{[[META8]], !"LVerDomain"}
; CHECK: [[META9]] = !{[[META10:![0-9]+]]}
; CHECK: [[META10]] = distinct !{[[META10]], [[META8]]}
; CHECK: [[META11]] = !{[[META12:![0-9]+]], [[META13:![0-9]+]], [[META7]]}
; CHECK: [[META12]] = distinct !{[[META12]], [[META8]]}
; CHECK: [[META13]] = distinct !{[[META13]], [[META8]]}
; CHECK: [[META14]] = !{[[META12]]}
; CHECK: [[META6]] = !{!"llvm.loop.isdistributed", i32 1}
; CHECK: [[META7]] = !{[[META8:![0-9]+]]}
; CHECK: [[META8]] = distinct !{[[META8]], [[META9:![0-9]+]]}
; CHECK: [[META9]] = distinct !{[[META9]], !"LVerDomain"}
; CHECK: [[META10]] = !{[[META11:![0-9]+]]}
; CHECK: [[META11]] = distinct !{[[META11]], [[META9]]}
; CHECK: [[META12]] = !{[[META13:![0-9]+]], [[META14:![0-9]+]], [[META8]]}
; CHECK: [[META13]] = distinct !{[[META13]], [[META9]]}
; CHECK: [[META14]] = distinct !{[[META14]], [[META9]]}
; CHECK: [[META15]] = !{[[META13]]}
; CHECK: [[LOOP16]] = distinct !{[[LOOP16]], [[META5]]}
; CHECK: [[META16]] = !{[[META14]]}
; CHECK: [[LOOP17]] = distinct !{[[LOOP17]], [[META5]]}
;.
49 changes: 25 additions & 24 deletions llvm/test/Transforms/LoopDistribute/followup.ll
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Expand Up @@ -58,29 +58,29 @@ define void @f(ptr %a, ptr %b, ptr %c, ptr %d, ptr %e) {
; CHECK: [[FOR_BODY_LDIST1]]:
; CHECK-NEXT: [[IND_LDIST1:%.*]] = phi i64 [ 0, %[[FOR_BODY_PH_LDIST1]] ], [ [[ADD_LDIST1:%.*]], %[[FOR_BODY_LDIST1]] ]
; CHECK-NEXT: [[ARRAYIDXA_LDIST1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IND_LDIST1]]
; CHECK-NEXT: [[LOADA_LDIST1:%.*]] = load i32, ptr [[ARRAYIDXA_LDIST1]], align 4, !alias.scope [[META3:![0-9]+]], !noalias [[META6:![0-9]+]]
; CHECK-NEXT: [[LOADA_LDIST1:%.*]] = load i32, ptr [[ARRAYIDXA_LDIST1]], align 4, !alias.scope [[META4:![0-9]+]], !noalias [[META7:![0-9]+]]
; CHECK-NEXT: [[ARRAYIDXB_LDIST1:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[IND_LDIST1]]
; CHECK-NEXT: [[LOADB_LDIST1:%.*]] = load i32, ptr [[ARRAYIDXB_LDIST1]], align 4, !alias.scope [[META10:![0-9]+]]
; CHECK-NEXT: [[LOADB_LDIST1:%.*]] = load i32, ptr [[ARRAYIDXB_LDIST1]], align 4, !alias.scope [[META11:![0-9]+]]
; CHECK-NEXT: [[MULA_LDIST1:%.*]] = mul i32 [[LOADB_LDIST1]], [[LOADA_LDIST1]]
; CHECK-NEXT: [[ADD_LDIST1]] = add nuw nsw i64 [[IND_LDIST1]], 1
; CHECK-NEXT: [[ARRAYIDXA_PLUS_4_LDIST1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[ADD_LDIST1]]
; CHECK-NEXT: store i32 [[MULA_LDIST1]], ptr [[ARRAYIDXA_PLUS_4_LDIST1]], align 4, !alias.scope [[META3]], !noalias [[META6]]
; CHECK-NEXT: store i32 [[MULA_LDIST1]], ptr [[ARRAYIDXA_PLUS_4_LDIST1]], align 4, !alias.scope [[META4]], !noalias [[META7]]
; CHECK-NEXT: [[EXITCOND_LDIST1:%.*]] = icmp eq i64 [[ADD_LDIST1]], 20
; CHECK-NEXT: br i1 [[EXITCOND_LDIST1]], label %[[FOR_BODY_PH:.*]], label %[[FOR_BODY_LDIST1]], !llvm.loop [[LOOP12:![0-9]+]]
; CHECK-NEXT: br i1 [[EXITCOND_LDIST1]], label %[[FOR_BODY_PH:.*]], label %[[FOR_BODY_LDIST1]], !llvm.loop [[LOOP13:![0-9]+]]
; CHECK: [[FOR_BODY_PH]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[IND:%.*]] = phi i64 [ 0, %[[FOR_BODY_PH]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[ADD]] = add nuw nsw i64 [[IND]], 1
; CHECK-NEXT: [[ARRAYIDXD:%.*]] = getelementptr inbounds i32, ptr [[D]], i64 [[IND]]
; CHECK-NEXT: [[LOADD:%.*]] = load i32, ptr [[ARRAYIDXD]], align 4, !alias.scope [[META14:![0-9]+]]
; CHECK-NEXT: [[LOADD:%.*]] = load i32, ptr [[ARRAYIDXD]], align 4, !alias.scope [[META15:![0-9]+]]
; CHECK-NEXT: [[ARRAYIDXE:%.*]] = getelementptr inbounds i32, ptr [[E]], i64 [[IND]]
; CHECK-NEXT: [[LOADE:%.*]] = load i32, ptr [[ARRAYIDXE]], align 4, !alias.scope [[META15:![0-9]+]]
; CHECK-NEXT: [[LOADE:%.*]] = load i32, ptr [[ARRAYIDXE]], align 4, !alias.scope [[META16:![0-9]+]]
; CHECK-NEXT: [[MULC:%.*]] = mul i32 [[LOADD]], [[LOADE]]
; CHECK-NEXT: [[ARRAYIDXC:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[IND]]
; CHECK-NEXT: store i32 [[MULC]], ptr [[ARRAYIDXC]], align 4, !alias.scope [[META16:![0-9]+]], !noalias [[META10]]
; CHECK-NEXT: store i32 [[MULC]], ptr [[ARRAYIDXC]], align 4, !alias.scope [[META17:![0-9]+]], !noalias [[META11]]
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[ADD]], 20
; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_END_LOOPEXIT16:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_END_LOOPEXIT16:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK: [[FOR_END_LOOPEXIT]]:
; CHECK-NEXT: br label %[[FOR_END:.*]]
; CHECK: [[FOR_END_LOOPEXIT16]]:
Expand Down Expand Up @@ -131,23 +131,24 @@ for.end:
!4 = !{!"llvm.loop.distribute.followup_sequential", !{!"FollowupSequential", i32 8}}
!5 = !{!"llvm.loop.distribute.followup_fallback", !{!"FollowupFallback"}}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]], [[META3:![0-9]+]]}
; CHECK: [[META1]] = !{!"FollowupAll"}
; CHECK: [[META2]] = !{!"FollowupFallback"}
; CHECK: [[META3]] = !{[[META4:![0-9]+]]}
; CHECK: [[META4]] = distinct !{[[META4]], [[META5:![0-9]+]]}
; CHECK: [[META5]] = distinct !{[[META5]], !"LVerDomain"}
; CHECK: [[META6]] = !{[[META7:![0-9]+]], [[META8:![0-9]+]], [[META9:![0-9]+]]}
; CHECK: [[META7]] = distinct !{[[META7]], [[META5]]}
; CHECK: [[META8]] = distinct !{[[META8]], [[META5]]}
; CHECK: [[META9]] = distinct !{[[META9]], [[META5]]}
; CHECK: [[META10]] = !{[[META11:![0-9]+]]}
; CHECK: [[META11]] = distinct !{[[META11]], [[META5]]}
; CHECK: [[LOOP12]] = distinct !{[[LOOP12]], [[META1]], [[META13:![0-9]+]]}
; CHECK: [[META13]] = !{!"FollowupSequential", i32 8}
; CHECK: [[META14]] = !{[[META8]]}
; CHECK: [[META3]] = !{!"llvm.loop.isdistributed", i32 1}
; CHECK: [[META4]] = !{[[META5:![0-9]+]]}
; CHECK: [[META5]] = distinct !{[[META5]], [[META6:![0-9]+]]}
; CHECK: [[META6]] = distinct !{[[META6]], !"LVerDomain"}
; CHECK: [[META7]] = !{[[META8:![0-9]+]], [[META9:![0-9]+]], [[META10:![0-9]+]]}
; CHECK: [[META8]] = distinct !{[[META8]], [[META6]]}
; CHECK: [[META9]] = distinct !{[[META9]], [[META6]]}
; CHECK: [[META10]] = distinct !{[[META10]], [[META6]]}
; CHECK: [[META11]] = !{[[META12:![0-9]+]]}
; CHECK: [[META12]] = distinct !{[[META12]], [[META6]]}
; CHECK: [[LOOP13]] = distinct !{[[LOOP13]], [[META1]], [[META14:![0-9]+]]}
; CHECK: [[META14]] = !{!"FollowupSequential", i32 8}
; CHECK: [[META15]] = !{[[META9]]}
; CHECK: [[META16]] = !{[[META7]]}
; CHECK: [[LOOP17]] = distinct !{[[LOOP17]], [[META1]], [[META18:![0-9]+]]}
; CHECK: [[META18]] = !{!"FollowupCoincident", i1 false}
; CHECK: [[META16]] = !{[[META10]]}
; CHECK: [[META17]] = !{[[META8]]}
; CHECK: [[LOOP18]] = distinct !{[[LOOP18]], [[META1]], [[META19:![0-9]+]]}
; CHECK: [[META19]] = !{!"FollowupCoincident", i1 false}
;.
8 changes: 4 additions & 4 deletions llvm/test/Transforms/LoopDistribute/laa-invalidation.ll
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Expand Up @@ -27,21 +27,21 @@ define void @test_pr50940(ptr %A, ptr %B) {
; CHECK-NEXT: store i16 1, ptr [[B]], align 1
; CHECK-NEXT: [[IV_NEXT_LVER_ORIG]] = add nuw nsw i16 [[IV_LVER_ORIG]], 1
; CHECK-NEXT: [[C_1_LVER_ORIG:%.*]] = icmp ult i16 [[IV_LVER_ORIG]], 38
; CHECK-NEXT: br i1 [[C_1_LVER_ORIG]], label [[INNER_LVER_ORIG]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK-NEXT: br i1 [[C_1_LVER_ORIG]], label [[INNER_LVER_ORIG]], label [[EXIT_LOOPEXIT:%.*]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: inner.ph3.ldist1:
; CHECK-NEXT: br label [[INNER_LDIST1:%.*]]
; CHECK: inner.ldist1:
; CHECK-NEXT: [[IV_LDIST1:%.*]] = phi i16 [ 0, [[INNER_PH3_LDIST1]] ], [ [[IV_NEXT_LDIST1:%.*]], [[INNER_LDIST1]] ]
; CHECK-NEXT: [[L_LDIST1:%.*]] = load <2 x i16>, ptr [[UGLYGEP]], align 1, !alias.scope !0, !noalias !3
; CHECK-NEXT: store i16 0, ptr [[GEP_A_3]], align 1, !alias.scope !0, !noalias !3
; CHECK-NEXT: [[L_LDIST1:%.*]] = load <2 x i16>, ptr [[UGLYGEP]], align 1, !alias.scope [[META2:![0-9]+]], !noalias [[META5:![0-9]+]]
; CHECK-NEXT: store i16 0, ptr [[GEP_A_3]], align 1, !alias.scope [[META2]], !noalias [[META5]]
; CHECK-NEXT: [[IV_NEXT_LDIST1]] = add nuw nsw i16 [[IV_LDIST1]], 1
; CHECK-NEXT: [[C_1_LDIST1:%.*]] = icmp ult i16 [[IV_LDIST1]], 38
; CHECK-NEXT: br i1 [[C_1_LDIST1]], label [[INNER_LDIST1]], label [[INNER_PH3:%.*]]
; CHECK: inner.ph3:
; CHECK-NEXT: br label [[INNER:%.*]]
; CHECK: inner:
; CHECK-NEXT: [[IV:%.*]] = phi i16 [ 0, [[INNER_PH3]] ], [ [[IV_NEXT:%.*]], [[INNER]] ]
; CHECK-NEXT: store i16 1, ptr [[B]], align 1, !alias.scope !3
; CHECK-NEXT: store i16 1, ptr [[B]], align 1, !alias.scope [[META5]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i16 [[IV]], 1
; CHECK-NEXT: [[C_1:%.*]] = icmp ult i16 [[IV]], 38
; CHECK-NEXT: br i1 [[C_1]], label [[INNER]], label [[EXIT_LOOPEXIT4:%.*]]
Expand Down
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