1; RUN: opt -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -S < %s | FileCheck %s
2
3; Test to make sure we destroy LCSSA's single entry phi nodes before
4; running liveness
5
6declare void @consume(...) "gc-leaf-function"
7
8define void @test6(i64 addrspace(1)* %obj) gc "statepoint-example" {
9; CHECK-LABEL: @test6
10entry:
11  br label %next
12
13next:                                             ; preds = %entry
14; CHECK-LABEL: next:
15; CHECK-NEXT: gc.statepoint
16; CHECK-NEXT: gc.relocate
17; CHECK-NEXT: bitcast
18; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
19; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
20; Need to delete unreachable gc.statepoint call
21  %obj2 = phi i64 addrspace(1)* [ %obj, %entry ]
22  call void @foo() [ "deopt"() ]
23  call void (...) @consume(i64 addrspace(1)* %obj2)
24  call void (...) @consume(i64 addrspace(1)* %obj)
25  ret void
26}
27
28define void @test7() gc "statepoint-example" {
29; CHECK-LABEL: test7
30; CHECK-NOT: gc.statepoint
31; Need to delete unreachable gc.statepoint invoke - tested seperately given
32; a correct implementation could only remove the instructions, not the block
33  ret void
34
35unreached:                                        ; preds = %unreached
36  %obj = phi i64 addrspace(1)* [ null, %unreached ]
37  call void @foo() [ "deopt"() ]
38  call void (...) @consume(i64 addrspace(1)* %obj)
39  br label %unreached
40}
41
42define void @test8() gc "statepoint-example" personality i32 ()* undef {
43; CHECK-LABEL: test8
44; CHECK-NOT: gc.statepoint
45; Bound the last check-not
46  ret void
47
48unreached:                                        ; No predecessors!
49  invoke void @foo() [ "deopt"() ]
50; CHECK-LABEL: @foo
51          to label %normal_return unwind label %exceptional_return
52
53normal_return:                                    ; preds = %unreached
54  ret void
55
56exceptional_return:                               ; preds = %unreached
57  %landing_pad4 = landingpad { i8*, i32 }
58          cleanup
59  ret void
60}
61
62declare void @foo()
63