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1; RUN: opt < %s -passes='print<loopnest>' -disable-output 2>&1 | FileCheck %s
2
3; Test that the loop nest analysis is able to analyze an infinite loop in a loop nest.
4define void @test1(i32** %A, i1 %cond) {
5; CHECK-LABEL: IsPerfect=true, Depth=1, OutermostLoop: for.inner, Loops: ( for.inner )
6; CHECK-LABEL: IsPerfect=false, Depth=2, OutermostLoop: for.outer, Loops: ( for.outer for.inner )
7; CHECK-LABEL: IsPerfect=true, Depth=1, OutermostLoop: for.infinite, Loops: ( for.infinite )
8entry:
9  br label %for.outer
10
11for.outer:
12  %i = phi i64 [ 0, %entry ], [ %inc_i, %for.outer.latch ]
13  br i1 %cond, label %for.inner, label %for.infinite
14
15for.inner:
16  %j = phi i64 [ 0, %for.outer ], [ %inc_j, %for.inner ]
17  %arrayidx_i = getelementptr inbounds i32*, i32** %A, i64 %i
18  %0 = load i32*, i32** %arrayidx_i, align 8
19  %arrayidx_j = getelementptr inbounds i32, i32* %0, i64 %j
20  store i32 0, i32* %arrayidx_j, align 4
21  %inc_j = add nsw i64 %j, 1
22  %cmp_j = icmp slt i64 %inc_j, 100
23  br i1 %cmp_j, label %for.inner, label %for.outer.latch
24
25for.infinite:
26  br label %for.infinite
27
28for.outer.latch:
29  %inc_i = add nsw i64 %i, 1
30  %cmp_i = icmp slt i64 %inc_i, 100
31  br i1 %cmp_i, label %for.outer, label %for.end
32
33for.end:
34  ret void
35}
36