xref: /llvm-project/llvm/test/Transforms/LoopVectorize/no_array_bounds_scalable.ll (revision 7d7577256b76e4293f455b8093504d5f7044ab4b) 
1; RUN: opt < %s -passes=loop-vectorize,transform-warning -S 2>&1 | FileCheck %s
2
3; Like no_array_bounds.ll we verify warnings are generated when vectorization/interleaving is
4; explicitly specified and fails to occur for both fixed and scalable vectorize.width loop hints.
5
6;  #pragma clang loop vectorize(enable)
7;  for (int i = 0; i < number; i++) {
8;    A[B[i]]++;
9;  }
10
11; CHECK: warning: <unknown>:0:0: loop not interleaved: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
12define dso_local void @foo(ptr nocapture %A, ptr nocapture readonly %B, i32 %N) {
13entry:
14  %cmp7 = icmp sgt i32 %N, 0
15  br i1 %cmp7, label %for.body.preheader, label %for.end
16
17for.body.preheader:                               ; preds = %entry
18  %wide.trip.count = zext i32 %N to i64
19  br label %for.body
20
21for.body:                                         ; preds = %for.body.preheader, %for.body
22  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
23  %arrayidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
24  %0 = load i32, ptr %arrayidx, align 4
25  %idxprom1 = sext i32 %0 to i64
26  %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %idxprom1
27  %1 = load i32, ptr %arrayidx2, align 4
28  %inc = add nsw i32 %1, 1
29  store i32 %inc, ptr %arrayidx2, align 4
30  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
31  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
32  br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !0
33
34for.end:                                          ; preds = %for.body, %entry
35  ret void
36}
37
38; CHECK: warning: <unknown>:0:0: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
39define dso_local void @foo2(ptr nocapture %A, ptr nocapture readonly %B, i32 %N) {
40entry:
41  %cmp7 = icmp sgt i32 %N, 0
42  br i1 %cmp7, label %for.body.preheader, label %for.end
43
44for.body.preheader:                               ; preds = %entry
45  %wide.trip.count = zext i32 %N to i64
46  br label %for.body
47
48for.body:                                         ; preds = %for.body.preheader, %for.body
49  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
50  %arrayidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
51  %0 = load i32, ptr %arrayidx, align 4
52  %idxprom1 = sext i32 %0 to i64
53  %arrayidx2 = getelementptr inbounds i32, ptr %A, i64 %idxprom1
54  %1 = load i32, ptr %arrayidx2, align 4
55  %inc = add nsw i32 %1, 1
56  store i32 %inc, ptr %arrayidx2, align 4
57  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
58  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
59  br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !3
60
61for.end:                                          ; preds = %for.body, %entry
62  ret void
63}
64
65!0 = distinct !{!0, !1, !2}
66!1 = !{!"llvm.loop.vectorize.enable", i1 true}
67!2 = !{!"llvm.loop.vectorize.width", i32 1}
68!3 = distinct !{!3, !1, !2, !4}
69!4 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
70