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