1; This is a collection of really basic tests for gc.statepoint rewriting.
2; RUN:  opt %s -rewrite-statepoints-for-gc -S | FileCheck %s
3
4declare void @foo()
5
6; Trivial relocation over a single call
7define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" {
8; CHECK-LABEL: @test1
9; CHECK-LABEL: entry:
10; CHECK-NEXT: gc.statepoint
11; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
12entry:
13  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
14  ret i8 addrspace(1)* %obj
15}
16
17; Two safepoints in a row (i.e. consistent liveness)
18define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" {
19; CHECK-LABEL: @test2
20; CHECK-LABEL: entry:
21; CHECK-NEXT: gc.statepoint
22; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
23; CHECK-NEXT: gc.statepoint
24; CHECK-NEXT: %obj.relocated1 = call coldcc i8 addrspace(1)*
25entry:
26  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
27  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
28  ret i8 addrspace(1)* %obj
29}
30
31; A simple derived pointer
32define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" {
33; CHECK-LABEL: entry:
34; CHECK-NEXT: getelementptr
35; CHECK-NEXT: gc.statepoint
36; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)*
37; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
38; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated
39; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated
40entry:
41  %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10
42  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
43
44  %a = load i8, i8 addrspace(1)* %derived
45  %b = load i8, i8 addrspace(1)* %obj
46  %c = sub i8 %a, %b
47  ret i8 %c
48}
49
50; Tests to make sure we visit both the taken and untaken predeccessor
51; of merge.  This was a bug in the dataflow liveness at one point.
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:
57; CHECK-LABEL: taken:
58; CHECK-NEXT: gc.statepoint
59; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
60  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
61  br label %merge
62
63untaken:
64; CHECK-LABEL: untaken:
65; CHECK-NEXT: gc.statepoint
66; CHECK-NEXT: %obj.relocated1 = call coldcc i8 addrspace(1)*
67  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
68  br label %merge
69
70merge:
71; CHECK-LABEL: merge:
72; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated1, %untaken ]
73; CHECK-NEXT: ret i8 addrspace(1)* %.0
74  ret i8 addrspace(1)* %obj
75}
76
77; When run over a function which doesn't opt in, should do nothing!
78define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" {
79; CHECK-LABEL: @test5
80; CHECK-LABEL: entry:
81; CHECK-NEXT: gc.statepoint
82; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)*
83entry:
84  call i32 (void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, 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(void ()*, i32, i32, ...)
89