1; NOTE: This is a timeout test for some O(something silly) constant folding behaviour. It may not be the best test. Providing it finishes, it passes.
2; RUN: opt < %s -O3 -S | FileCheck %s
3target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
4target triple = "armv8-none-eabi"
5
6%struct.ST = type { ptr }
7
8@global = internal global [121 x i8] zeroinitializer, align 1
9
10define void @func() #0 {
11;CHECK-LABEL: func
12entry:
13  %s = alloca ptr, align 4
14  %j = alloca i32, align 4
15  store ptr @global, ptr %s, align 4
16  store i32 0, ptr %j, align 4
17  br label %for.cond
18
19for.cond:                                         ; preds = %for.inc, %entry
20  %0 = load i32, ptr %j, align 4
21  %cmp = icmp slt i32 %0, 30
22  br i1 %cmp, label %for.body, label %for.end
23
24for.body:                                         ; preds = %for.cond
25  %1 = load ptr, ptr %s, align 4
26  %2 = bitcast ptr %1 to ptr
27  %add.ptr = getelementptr inbounds i8, ptr %2, i32 4
28  %3 = ptrtoint ptr %add.ptr to i32
29  %4 = load ptr, ptr %s, align 4
30  %5 = bitcast ptr %4 to ptr
31  %add.ptr1 = getelementptr inbounds i8, ptr %5, i32 4
32  %6 = ptrtoint ptr %add.ptr1 to i32
33  %rem = urem i32 %6, 2
34  %cmp2 = icmp eq i32 %rem, 0
35  br i1 %cmp2, label %cond.true, label %cond.false
36
37cond.true:                                        ; preds = %for.body
38  br label %cond.end
39
40cond.false:                                       ; preds = %for.body
41  %7 = load ptr, ptr %s, align 4
42  %8 = bitcast ptr %7 to ptr
43  %add.ptr3 = getelementptr inbounds i8, ptr %8, i32 4
44  %9 = ptrtoint ptr %add.ptr3 to i32
45  %rem4 = urem i32 %9, 2
46  br label %cond.end
47
48cond.end:                                         ; preds = %cond.false, %cond.true
49  %cond = phi i32 [ 0, %cond.true ], [ %rem4, %cond.false ]
50  %add = add i32 %3, %cond
51  %10 = inttoptr i32 %add to ptr
52  %11 = load ptr, ptr %s, align 4
53  %next = getelementptr inbounds %struct.ST, ptr %11, i32 0, i32 0
54  store ptr %10, ptr %next, align 4
55  %12 = load ptr, ptr %s, align 4
56  %next5 = getelementptr inbounds %struct.ST, ptr %12, i32 0, i32 0
57  %13 = load ptr, ptr %next5, align 4
58  store ptr %13, ptr %s, align 4
59  br label %for.inc
60
61for.inc:                                          ; preds = %cond.end
62  %14 = load i32, ptr %j, align 4
63  %inc = add nsw i32 %14, 1
64  store i32 %inc, ptr %j, align 4
65  br label %for.cond
66
67for.end:                                          ; preds = %for.cond
68  %15 = load ptr, ptr %s, align 4
69  %next6 = getelementptr inbounds %struct.ST, ptr %15, i32 0, i32 0
70  store ptr null, ptr %next6, align 4
71  ret void
72}
73
74