[LoopDist] Add metadata for checking post process state of distributed loops

Add a boolean marker noting when loop distribution was sucessfully applied
in a loops meta data, then check for loops which are already distributed
to prevent reprocessing.

Author: mcberg2021

llvm/docs/LangRef.rst

@@ -7966,6 +7966,13 @@ The attributes in this metadata is 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
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

llvm/docs/TransformMetadata.rst

@@ -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
 ---------------
 

llvm/lib/Transforms/Scalar/LoopDistribute.cpp

@@ -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 {
@@ -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
@@ -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))

llvm/test/Transforms/LoopDistribute/cross-partition-access.ll

@@ -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]]:
@@ -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]]}
 ;.

llvm/test/Transforms/LoopDistribute/followup.ll

@@ -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]]:
@@ -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}
 ;.

llvm/test/Transforms/LoopDistribute/laa-invalidation.ll

@@ -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:%.*]]