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Merged
merged 1 commit into from
Jun 8, 2022
Merged

PR for llvm/llvm-project#55704 #2

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2 changes: 2 additions & 0 deletions llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1173,6 +1173,8 @@ bool LoopIdiomRecognize::processLoopStridedStore(
CallInst *NewCall;
if (SplatValue) {
AAMDNodes AATags = TheStore->getAAMetadata();
for (Instruction *Store : Stores)
AATags = AATags.merge(Store->getAAMetadata());
if (auto CI = dyn_cast<ConstantInt>(NumBytes))
AATags = AATags.extendTo(CI->getZExtValue());
else
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47 changes: 47 additions & 0 deletions llvm/test/Transforms/LoopIdiom/memset-tbaa.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,45 @@ for.body:
br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
}

%struct.A = type { i32*, %struct.B }
%struct.B = type { i32* }

define dso_local void @adjacent_store_memset(%struct.A* nocapture %a, i64 %len) {
; CHECK-LABEL: @adjacent_store_memset(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A1:%.*]] = bitcast %struct.A* [[A:%.*]] to i8*
; CHECK-NEXT: [[UMAX:%.*]] = call i64 @llvm.umax.i64(i64 %len, i64 1)
; CHECK-NEXT: [[LEN:%.*]] = shl nuw i64 [[UMAX]], 4
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 [[A1]], i8 0, i64 [[LEN]], i1 false), !tbaa [[TBAA9:![0-9]+]]
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: ret void
; CHECK: for.body:
; CHECK-NEXT: [[I_09:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, %entry ]
; CHECK-NEXT: %p = getelementptr inbounds %struct.A, %struct.A* [[A]], i64 [[I_09]], i32 0
; CHECK-NEXT: %p2 = getelementptr inbounds %struct.A, %struct.A* [[A]], i64 [[I_09]], i32 1, i32 0
; CHECK-NEXT: [[INC]] = add i64 [[I_09]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp ult i64 [[INC]], %len
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
;
entry:
br label %for.body

for.cond.cleanup:
ret void

for.body:
%i.09 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
%p = getelementptr inbounds %struct.A, %struct.A* %a, i64 %i.09, i32 0
store i32* null, i32** %p, align 8, !tbaa !18
%p2 = getelementptr inbounds %struct.A, %struct.A* %a, i64 %i.09, i32 1, i32 0
store i32* null, i32** %p2, align 8, !tbaa !21
%inc = add i64 %i.09, 1
%cmp = icmp ult i64 %inc, %len
br i1 %cmp, label %for.body, label %for.cond.cleanup
}


; CHECK: [[TBAA0]] = !{[[TBAA1:.+]], [[TBAA1]], i64 0}
; CHECK: [[TBAA1]] = !{!"double", [[TBAA2:.+]], i64 0}
; CHECK: [[TBAA2]] = !{!"omnipotent char", [[TBAA3:.+]], i64 0}
Expand All @@ -99,6 +138,8 @@ for.body:
; CHECK: [[TBAA5]] = !{[[TBAA7:.+]], i64 32, !"_ZTS1A", [[TBAA6]], i64 0, i64 8, [[TBAA6]], i64 8, i64 8, [[TBAA6]], i64 16, i64 8, [[TBAA6]], i64 24, i64 8}
; CHECK: [[TBAA7]] = !{[[TBAA3]], i64 0, !"omnipotent char"}
; CHECK: [[TBAA6]] = !{[[TBAA7]], i64 8, !"double"}
; CHECK: [[TBAA9]] = !{[[TBAA10:.+]], [[TBAA10]], i64 0}
; CHECK: [[TBAA10]] = !{!"any pointer", [[TBAA2]], i64 0}

!5 = !{!6, !6, i64 0}
!6 = !{!"double", !7, i64 0}
Expand All @@ -109,3 +150,9 @@ for.body:
!17 = !{!15, i64 8, !"double"}
!9 = !{!15, i64 32, !"_ZTS1A", !17, i64 0, i64 8, !17, i64 8, i64 8, !17, i64 16, i64 8, !17, i64 24, i64 8}
!10 = !{!9, !17, i64 0, i64 1}

!18 = !{!19, !20, i64 0}
!19 = !{!"A", !20, i64 0, !22, i64 8}
!20 = !{!"any pointer", !7, i64 0}
!21 = !{!22, !20, i64 0}
!22 = !{!"B", !20, i64 0}