1; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
2; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s
3
4; The comparison uses the pre-inc value, which could lead LSR to
5; try to compute -INT64_MIN.
6
7; CHECK: movabsq $-9223372036854775808, %rax
8; CHECK: cmpq  %rax,
9; CHECK: sete  %al
10
11declare i64 @bar()
12
13define i1 @foo() nounwind {
14entry:
15  br label %for.cond.i
16
17for.cond.i:
18  %indvar = phi i64 [ 0, %entry ], [ %indvar.next, %for.cond.i ]
19  %t = call i64 @bar()
20  %indvar.next = add i64 %indvar, 1
21  %s = icmp ne i64 %indvar.next, %t
22  br i1 %s, label %for.cond.i, label %__ABContainsLabel.exit
23
24__ABContainsLabel.exit:
25  %cmp = icmp eq i64 %indvar, 9223372036854775807
26  ret i1 %cmp
27}
28
29define void @func_37() noreturn nounwind readonly {
30entry:
31  br label %for.body
32
33for.body:                                         ; preds = %for.inc8, %entry
34  %indvar = phi i64 [ 0, %entry ], [ %indvar.next, %for.inc8 ]
35  %sub.i = add i64 undef, %indvar
36  %cmp.i = icmp eq i64 %sub.i, -9223372036854775808
37  br i1 undef, label %for.inc8, label %for.cond4
38
39for.cond4:                                        ; preds = %for.cond4, %for.body
40  br label %for.cond4
41
42for.inc8:                                         ; preds = %for.body
43  %indvar.next = add i64 %indvar, 1
44  br label %for.body
45}
46