1; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -pass-remarks-analysis=loop-vectorize < %s 2>&1 | FileCheck %s
2
3; CHECK: remark: {{.*}}: loop not vectorized: value could not be identified as an induction or reduction variable
4; CHECK: remark: {{.*}}: loop not vectorized: use of induction value outside of the loop is not handled by vectorizer
5
6target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
7
8@f = common global i32 0, align 4
9@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
10@c = common global i32 0, align 4
11@a = common global i32 0, align 4
12@b = common global i32 0, align 4
13@e = common global i32 0, align 4
14
15; We used to vectorize this loop. But it has a value that is used outside of the
16; and is not a recognized reduction variable "tmp17".
17
18; CHECK-LABEL: @main(
19; CHECK-NOT: <2 x i32>
20
21define i32 @main()  {
22bb:
23  %b.promoted = load i32, i32* @b, align 4
24  br label %.lr.ph.i
25
26.lr.ph.i:
27  %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
28  %tmp2 = icmp sgt i32 %tmp8, 10
29  br i1 %tmp2, label %bb16, label %bb10
30
31bb10:
32  br label %bb16
33
34bb16:
35  %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ]
36  %tmp18 = add nsw i32 %tmp8, 1
37  %tmp19 = icmp slt i32 %tmp18, 4
38  br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit
39
40f1.exit.loopexit:
41  %.lcssa = phi i32 [ %tmp17, %bb16 ]
42  ret i32 %.lcssa
43}
44
45; Don't vectorize this loop. Its phi node (induction variable) has an outside
46; loop user. We currently don't handle this case.
47; PR17179
48
49; CHECK-LABEL: @test2(
50; CHECK-NOT:  <2 x
51
52@x1 = common global i32 0, align 4
53@x2 = common global i32 0, align 4
54@x0 = common global i32 0, align 4
55
56define i32 @test2()  {
57entry:
58  store i32 0, i32* @x1, align 4
59  %0 = load i32, i32* @x0, align 4
60  br label %for.cond1.preheader
61
62for.cond1.preheader:
63  %inc7 = phi i32 [ 0, %entry ], [ %inc, %for.cond1.preheader ]
64  %inc = add nsw i32 %inc7, 1
65  %cmp = icmp eq i32 %inc, 52
66  br i1 %cmp, label %for.end5, label %for.cond1.preheader
67
68for.end5:
69  %inc7.lcssa = phi i32 [ %inc7, %for.cond1.preheader ]
70  %xor = xor i32 %inc7.lcssa, %0
71  store i32 52, i32* @x1, align 4
72  store i32 1, i32* @x2, align 4
73  ret i32 %xor
74}
75