1 ; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -pass-remarks-analysis=loop-vectorize < %s 2>&1 | FileCheck %s
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
6 target 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"
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
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".
19 ; CHECK-NOT: <2 x i32>
23 %b.promoted = load i32* @b, align 4
27 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ]
28 %tmp2 = icmp sgt i32 %tmp8, 10
29 br i1 %tmp2, label %bb16, label %bb10
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
41 %.lcssa = phi i32 [ %tmp17, %bb16 ]
45 ; Don't vectorize this loop. Its phi node (induction variable) has an outside
46 ; loop user. We currently don't handle this case.
49 ; CHECK-LABEL: @test2(
52 @x1 = common global i32 0, align 4
53 @x2 = common global i32 0, align 4
54 @x0 = common global i32 0, align 4
58 store i32 0, i32* @x1, align 4
59 %0 = load i32* @x0, align 4
60 br label %for.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
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