1; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
2; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
3
4; CHECK: Loop %bb1: backedge-taken count is ((2 * %a.promoted) /u 2)
5
6target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
7target triple = "x86_64-apple-macosx10.10.0"
8
9@a = global i8 -127, align 1
10@b = common global i32 0, align 4
11
12declare void @use(i32)
13
14define i32 @main() {
15bb:
16  %a.promoted = load i8, i8* @a
17  br label %bb1
18
19bb1:                                              ; preds = %bb1, %bb
20  %tmp = phi i8 [ %tmp2, %bb1 ], [ %a.promoted, %bb ]
21  %tmp2 = add i8 %tmp, -1
22  %tmp3 = sext i8 %tmp to i32
23  %tmp4 = xor i32 %tmp3, -1
24  %tmp5 = sext i8 %tmp2 to i32
25  %tmpf = sub nsw i32 %tmp4, %tmp5
26  %tmp6 = trunc i32 %tmpf to i8
27  %tmp7 = icmp eq i8 %tmp6, 0
28  br i1 %tmp7, label %bb8, label %bb1
29
30bb8:                                              ; preds = %bb1
31  store i8 %tmp2, i8* @a
32  store i32 %tmp4, i32* @b
33  %tmp9 = sext i8 %tmp2 to i32
34  call void @use(i32 %tmp9)
35  ret i32 0
36}
37