1; RUN: opt -indvars -S < %s | FileCheck %s
2
3; indvars should transform the phi node pair from the for-loop
4; CHECK-LABEL: @main(
5; CHECK: ret = phi i32 [ 0, %entry ], [ 0, {{.*}} ]
6
7@c = common global i32 0, align 4
8
9define i32 @main() #0 {
10entry:
11  %0 = load i32* @c, align 4
12  %tobool = icmp eq i32 %0, 0
13  br i1 %tobool, label %for.body, label %exit
14
15for.body:
16  %inc2 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
17  %sub = add i32 %inc2, -1
18  %cmp1 = icmp uge i32 %sub, %inc2
19  %conv = zext i1 %cmp1 to i32
20  br label %for.inc
21
22for.inc:
23  %inc = add nsw i32 %inc2, 1
24  %cmp = icmp slt i32 %inc, 5
25  br i1 %cmp, label %for.body, label %exit
26
27exit:
28  %ret = phi i32 [ 0, %entry ], [ %conv, %for.inc ]
29  ret i32 %ret
30}
31