xref: /llvm-project/llvm/test/Transforms/RewriteStatepointsForGC/meetBDVState-hangs.ll (revision f01a3a893c147c1594b9a3fbd817456b209dabbf) 
1; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
2
3; Regression test to incorrectly testing fixed state causing infinite loop.
4; CHECK: test
5target triple = "x86_64-unknown-linux-gnu"
6
7declare void @bar(ptr addrspace(1) nocapture readonly)
8declare noalias ptr addrspace(1) @foo()
9
10define ptr addrspace(1) @test(i1 %c, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5, i1 %c.exit) gc "statepoint-example" {
11entry:
12  br i1 %c, label %ph.L, label %ph.R
13ph.L:
14  %ph.L.p.b = call noalias nonnull ptr addrspace(1) @foo()
15  %ph.L.p = getelementptr i8, ptr addrspace(1) %ph.L.p.b, i64 8
16  br label %ph.M
17ph.R:
18  %ph.R.p = call noalias nonnull ptr addrspace(1) @foo()
19  br label %ph.M
20ph.M:
21  %ph.M.p = phi ptr addrspace(1) [ %ph.L.p, %ph.L ], [ %ph.R.p, %ph.R ]
22  br label %header
23
24header:
25  %header.p = phi ptr addrspace(1) [ %ph.M.p, %ph.M ], [ %backedge.p, %backedge]
26  br i1 %c1, label %loop.M, label %loop.R
27
28loop.R:
29  br i1 %c2, label %loop.R.M, label %loop.R.R
30
31loop.R.R:
32  %loop.R.R.p = call noalias nonnull ptr addrspace(1) @foo()
33  br label %loop.R.M
34
35loop.R.M:
36  %loop.R.M.p = phi ptr addrspace(1) [ %header.p, %loop.R ], [ %loop.R.R.p, %loop.R.R ]
37  br label %loop.M
38
39loop.M:
40  %loop.M.p = phi ptr addrspace(1) [ %loop.R.M.p, %loop.R.M ], [ %header.p, %header ]
41  br i1 %c4, label %backedge, label %pre.backedge.R
42
43pre.backedge.R:
44  br i1 %c5, label %pre.backedge.R.L, label %pre.backedge.R.R
45pre.backedge.R.L:
46  %pre.backedge.R.L.p.b = call noalias nonnull ptr addrspace(1) @foo()
47  %pre.backedge.R.L.p = getelementptr i8, ptr addrspace(1) %pre.backedge.R.L.p.b, i64 8
48  br label %pre.backedge.R.M
49pre.backedge.R.R:
50  %pre.backedge.R.R.p = call noalias nonnull ptr addrspace(1) @foo()
51  br label %pre.backedge.R.M
52pre.backedge.R.M:
53  %pre.backedge.R.M.p = phi ptr addrspace(1) [ %pre.backedge.R.L.p, %pre.backedge.R.L ], [ %pre.backedge.R.R.p, %pre.backedge.R.R ]
54  br label %backedge
55
56backedge:
57  %backedge.p = phi ptr addrspace(1) [ %pre.backedge.R.M.p, %pre.backedge.R.M ], [ %loop.M.p, %loop.M ]
58  br i1 %c.exit, label %header, label %exit
59
60exit:                                                ; preds = %3, %1
61  call void @bar(ptr addrspace(1) align 8 %header.p) [ "deopt"() ]
62  ret ptr addrspace(1) %header.p
63}
64