1; This is a collection of really basic tests for gc.statepoint rewriting.
2; RUN:  opt %s -rewrite-statepoints-for-gc -rs4gc-use-deopt-bundles -spp-rematerialization-threshold=0 -S | FileCheck %s
3
4; Trivial relocation over a single call
5
6declare void @foo()
7
8define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" {
9; CHECK-LABEL: @test1
10entry:
11; CHECK-LABEL: entry:
12; CHECK-NEXT: gc.statepoint
13; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
14; Two safepoints in a row (i.e. consistent liveness)
15  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
16  ret i8 addrspace(1)* %obj
17}
18
19define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" {
20; CHECK-LABEL: @test2
21entry:
22; CHECK-LABEL: entry:
23; CHECK-NEXT: gc.statepoint
24; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
25; CHECK-NEXT: gc.statepoint
26; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
27; A simple derived pointer
28  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
29  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
30  ret i8 addrspace(1)* %obj
31}
32
33define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" {
34entry:
35; CHECK-LABEL: entry:
36; CHECK-NEXT: getelementptr
37; CHECK-NEXT: gc.statepoint
38; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)*
39; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
40; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated
41; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated
42; Tests to make sure we visit both the taken and untaken predeccessor
43; of merge.  This was a bug in the dataflow liveness at one point.
44  %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10
45  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
46  %a = load i8, i8 addrspace(1)* %derived
47  %b = load i8, i8 addrspace(1)* %obj
48  %c = sub i8 %a, %b
49  ret i8 %c
50}
51
52define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" {
53entry:
54  br i1 %cmp, label %taken, label %untaken
55
56taken:                                            ; preds = %entry
57; CHECK-LABEL: taken:
58; CHECK-NEXT: gc.statepoint
59; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
60  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
61  br label %merge
62
63untaken:                                          ; preds = %entry
64; CHECK-LABEL: untaken:
65; CHECK-NEXT: gc.statepoint
66; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
67  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
68  br label %merge
69
70merge:                                            ; preds = %untaken, %taken
71; CHECK-LABEL: merge:
72; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ]
73; CHECK-NEXT: ret i8 addrspace(1)* %.0
74; When run over a function which doesn't opt in, should do nothing!
75  ret i8 addrspace(1)* %obj
76}
77
78define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" {
79; CHECK-LABEL: @test5
80entry:
81; CHECK-LABEL: entry:
82; CHECK-NEXT: gc.statepoint
83; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)*
84  %0 = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
85  ret i8 addrspace(1)* %obj
86}
87
88declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
89