xref: /llvm-project/llvm/test/Analysis/PostDominators/infinite-loop.ll (revision 7cf5581712b24d4aea5dffa2e23f0ed42af1954d) 
1; RUN: opt < %s -passes='print<postdomtree>' 2>&1 | FileCheck %s
2
3@a = external global i32, align 4
4
5define void @fn1() {
6entry:
7  store i32 5, ptr @a, align 4
8  %call = call i32 (...) @foo()
9  %tobool = icmp ne i32 %call, 0
10  br i1 %tobool, label %if.then, label %if.end
11
12if.then:                                          ; preds = %entry
13  br label %loop
14
15loop:                                             ; preds = %loop, %if.then
16  br label %loop
17
18if.end:                                           ; preds = %entry
19  store i32 6, ptr @a, align 4
20  ret void
21}
22
23declare i32 @foo(...)
24
25; CHECK:      Inorder PostDominator Tree:
26; CHECK-NEXT:  [1]  <<exit node>>
27; CHECK:         [2] %loop
28; CHECK-NEXT:      [3] %if.then
29; CHECK: Roots: %if.end %loop
30