1; RUN: opt -S -instcombine < %s | FileCheck %s
2
3@c = common global i8 0, align 1
4@a = common global i8 0, align 1
5@b = common global i8 0, align 1
6
7define void @func() nounwind uwtable ssp {
8entry:
9  %0 = load i8* @c, align 1
10  %conv = zext i8 %0 to i32
11  %or = or i32 %conv, 1
12  %conv1 = trunc i32 %or to i8
13  store i8 %conv1, i8* @a, align 1
14  %conv2 = zext i8 %conv1 to i32
15  %neg = xor i32 %conv2, -1
16  %and = and i32 1, %neg
17  %conv3 = trunc i32 %and to i8
18  store i8 %conv3, i8* @b, align 1
19  %1 = load i8* @a, align 1
20  %conv4 = zext i8 %1 to i32
21  %conv5 = zext i8 %conv3 to i32
22  %tobool = icmp ne i32 %conv4, 0
23  br i1 %tobool, label %land.rhs, label %land.end
24
25land.rhs:                                         ; preds = %entry
26  %tobool8 = icmp ne i32 %conv5, 0
27  br label %land.end
28
29land.end:                                         ; preds = %land.rhs, %entry
30  %2 = phi i1 [ false, %entry ], [ %tobool8, %land.rhs ]
31  %land.ext = zext i1 %2 to i32
32  %mul = mul nsw i32 3, %land.ext
33  %conv9 = trunc i32 %mul to i8
34  store i8 %conv9, i8* @a, align 1
35  ret void
36
37; CHECK-LABEL: @func(
38; CHECK-NOT: select
39}
40