forked from OSchip/llvm-project
79 lines
2.2 KiB
LLVM
79 lines
2.2 KiB
LLVM
; RUN: opt -basic-aa -loop-vectorize -force-vector-width=2 \
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; RUN: -force-vector-interleave=1 -S < %s \
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; RUN: | FileCheck %s -check-prefix=BOTH -check-prefix=LV
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; RUN: opt -basic-aa -scoped-noalias-aa -loop-vectorize -dse -force-vector-width=2 \
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; RUN: -force-vector-interleave=1 -S < %s \
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; RUN: | FileCheck %s -check-prefix=BOTH -check-prefix=DSE
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; This loop needs to be versioned with memchecks between {A, B} x {C} before
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; it can be vectorized.
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;
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; for (i = 0; i < n; i++) {
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; C[i] = A[i] + 1;
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; C[i] += B[i];
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; }
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;
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; Check that the corresponding noalias metadata is added to the vector loop
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; but not to the scalar loop.
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;
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; Since in the versioned vector loop C and B can no longer alias, the first
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; store to C[i] can be DSE'd.
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define void @f(i32* %a, i32* %b, i32* %c) {
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entry:
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br label %for.body
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; BOTH: vector.memcheck:
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; BOTH: vector.body:
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for.body: ; preds = %for.body, %entry
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%ind = phi i64 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
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; Scope 1
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; LV: = load {{.*}} !alias.scope !0
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%loadA = load i32, i32* %arrayidxA, align 4
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%add = add nuw i32 %loadA, 2
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%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
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; Noalias with scope 1 and 6
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; LV: store {{.*}} !alias.scope !3, !noalias !5
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; DSE-NOT: store
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store i32 %add, i32* %arrayidxC, align 4
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%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
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; Scope 6
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; LV: = load {{.*}} !alias.scope !7
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%loadB = load i32, i32* %arrayidxB, align 4
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%add2 = add nuw i32 %add, %loadB
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; Noalias with scope 1 and 6
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; LV: store {{.*}} !alias.scope !3, !noalias !5
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; DSE: store
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store i32 %add2, i32* %arrayidxC, align 4
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%inc = add nuw nsw i64 %ind, 1
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%exitcond = icmp eq i64 %inc, 20
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br i1 %exitcond, label %for.end, label %for.body
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; BOTH: for.body:
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; BOTH-NOT: !alias.scope
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; BOTH-NOT: !noalias
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for.end: ; preds = %for.body
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ret void
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}
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; LV: !0 = !{!1}
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; LV: !1 = distinct !{!1, !2}
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; LV: !2 = distinct !{!2, !"LVerDomain"}
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; LV: !3 = !{!4}
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; LV: !4 = distinct !{!4, !2}
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; LV: !5 = !{!1, !6}
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; LV: !6 = distinct !{!6, !2}
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; LV: !7 = !{!6}
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