derek.holloway
7502bf64a4
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60 lines
2.6 KiB
LLVM
60 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -S -passes=licm | FileCheck %s
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; See https://discourse.llvm.org/t/rfc-dont-merge-memory-locations-in-aliassettracker/73336
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; pairwise TBAA indicates NoAlias of load/store ptr at %s with store i32 at %0
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; yet LICM fails to promote load/store ptr %s out of the loop
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define void @_Z4testP1S(ptr %s) {
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; CHECK-LABEL: define void @_Z4testP1S(
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; CHECK-SAME: ptr [[S:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[S_PROMOTED:%.*]] = load ptr, ptr [[S]], align 4, !tbaa [[ANYPTR_TBAA0:![0-9]+]]
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; CHECK-NEXT: br label %[[FOR_BODY:.*]]
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; CHECK: [[FOR_COND_CLEANUP:.*]]:
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; CHECK-NEXT: [[ADD_PTR_I_LCSSA:%.*]] = phi ptr [ [[ADD_PTR_I:%.*]], %[[FOR_BODY]] ]
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; CHECK-NEXT: store ptr [[ADD_PTR_I_LCSSA]], ptr [[S]], align 4, !tbaa [[ANYPTR_TBAA0]]
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; CHECK-NEXT: ret void
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; CHECK: [[FOR_BODY]]:
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; CHECK-NEXT: [[ADD_PTR_I1:%.*]] = phi ptr [ [[S_PROMOTED]], %[[ENTRY]] ], [ [[ADD_PTR_I]], %[[FOR_BODY]] ]
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; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_BODY]] ]
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; CHECK-NEXT: store i32 [[I_05]], ptr [[ADD_PTR_I1]], align 4, !tbaa [[INT_TBAA4:![0-9]+]]
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; CHECK-NEXT: [[ADD_PTR_I]] = getelementptr inbounds i32, ptr [[ADD_PTR_I1]], i32 1
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
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; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[INC]], 100
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; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]]
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;
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%0 = load ptr, ptr %s, align 4, !tbaa !0
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store i32 %i.05, ptr %0, align 4, !tbaa !5
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%add.ptr.i = getelementptr inbounds i32, ptr %0, i32 1
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store ptr %add.ptr.i, ptr %s, align 4, !tbaa !7
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond.not = icmp eq i32 %inc, 100
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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!0 = !{!1, !2, i64 0}
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!1 = !{!"_ZTS1S", !2, i64 0}
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!2 = !{!"any pointer", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C++ TBAA"}
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!5 = !{!6, !6, i64 0}
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!6 = !{!"int", !3, i64 0}
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!7 = !{!2, !2, i64 0}
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;.
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; CHECK: [[ANYPTR_TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0}
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; CHECK: [[META1]] = !{!"any pointer", [[META2:![0-9]+]], i64 0}
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; CHECK: [[META2]] = !{!"omnipotent char", [[META3:![0-9]+]], i64 0}
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; CHECK: [[META3]] = !{!"Simple C++ TBAA"}
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; CHECK: [[INT_TBAA4]] = !{[[META5:![0-9]+]], [[META5]], i64 0}
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; CHECK: [[META5]] = !{!"int", [[META2]], i64 0}
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;.
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