1; RUN: opt < %s  -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S
2
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4target triple = "x86_64-apple-macosx10.8.0"
5
6@a = common global i8 0, align 1
7@b = common global i8 0, align 1
8
9define void @f() nounwind uwtable ssp {
10scalar.ph:
11  store i8 0, i8* inttoptr (i64 1 to i8*), align 1
12  %0 = load i8* @a, align 1
13  br label %for.body
14
15for.body:
16  %mul16 = phi i8 [ 0, %scalar.ph ], [ %mul, %for.body ]              ; <------- i8 induction var.
17  %c.015 = phi i8 [ undef, %scalar.ph ], [ %conv8, %for.body ]
18  %conv2 = sext i8 %c.015 to i32
19  %tobool = icmp ne i8 %c.015, 0
20  %.sink = select i1 %tobool, i8 %c.015, i8 %0
21  %mul = mul i8 %mul16, %.sink
22  %add = add nsw i32 %conv2, 1
23  %conv8 = trunc i32 %add to i8
24  %sext = shl i32 %add, 24
25  %phitmp14 = icmp slt i32 %sext, 268435456
26  br i1 %phitmp14, label %for.body, label %for.end
27
28for.end:                                          ; preds = %for.body
29  store i8 %mul, i8* @b, align 1
30  ret void
31}
32