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7c0b2ece14
Differential Revision: https://reviews.llvm.org/D26811 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290611 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.1 KiB
LLVM
37 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -basicaa -scoped-noalias -memcpyopt -S %s | FileCheck %s
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%T = type { i8, i32 }
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; memcpy(%d, %a) should not be generated since store2 may-aliases load %a.
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define void @f(%T* %a, %T* %b, %T* %c, %T* %d) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: [[VAL:%.*]] = load %T, %T* %a, !alias.scope !0
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; CHECK-NEXT: store %T { i8 23, i32 23 }, %T* %b, !alias.scope !3
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; CHECK-NEXT: store %T { i8 44, i32 44 }, %T* %c, !alias.scope !6, !noalias !3
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; CHECK-NEXT: store %T [[VAL]], %T* %d, !alias.scope !9, !noalias !12
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; CHECK-NEXT: ret void
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;
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%val = load %T, %T* %a, !alias.scope !{!10}
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; store1 may-aliases the load
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store %T { i8 23, i32 23 }, %T* %b, !alias.scope !{!11}
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; store2 may-aliases the load and store3
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store %T { i8 44, i32 44 }, %T* %c, !alias.scope !{!12}, !noalias !{!11}
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; store3
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store %T %val, %T* %d, !alias.scope !{!13}, !noalias !{!10, !11}
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ret void
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}
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!0 = !{!0}
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!1 = !{!1}
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!2 = !{!2}
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!3 = !{!3}
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!10 = !{ !10, !0 }
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!11 = !{ !11, !1 }
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!12 = !{ !12, !2 }
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!13 = !{ !13, !3 }
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