1; This is a collection of really basic tests for gc.statepoint rewriting.
2; RUN: opt < %s -rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s
3; RUN: opt < %s -passes=rewrite-statepoints-for-gc -spp-rematerialization-threshold=0 -S | FileCheck %s
4
5; Trivial relocation over a single call
6
7declare void @foo()
8
9define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" {
10; CHECK-LABEL: @test1
11entry:
12; CHECK-LABEL: entry:
13; CHECK-NEXT: gc.statepoint
14; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
15; Two safepoints in a row (i.e. consistent liveness)
16  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
17  ret i8 addrspace(1)* %obj
18}
19
20define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" {
21; CHECK-LABEL: @test2
22entry:
23; CHECK-LABEL: entry:
24; CHECK-NEXT: gc.statepoint
25; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
26; CHECK-NEXT: gc.statepoint
27; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
28; A simple derived pointer
29  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
30  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
31  ret i8 addrspace(1)* %obj
32}
33
34define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" {
35entry:
36; CHECK-LABEL: entry:
37; CHECK-NEXT: getelementptr
38; CHECK-NEXT: gc.statepoint
39; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
40; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)*
41; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated
42; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated
43; Tests to make sure we visit both the taken and untaken predeccessor
44; of merge.  This was a bug in the dataflow liveness at one point.
45  %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10
46  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
47  %a = load i8, i8 addrspace(1)* %derived
48  %b = load i8, i8 addrspace(1)* %obj
49  %c = sub i8 %a, %b
50  ret i8 %c
51}
52
53define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" {
54entry:
55  br i1 %cmp, label %taken, label %untaken
56
57taken:                                            ; preds = %entry
58; CHECK-LABEL: taken:
59; CHECK-NEXT: gc.statepoint
60; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
61  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
62  br label %merge
63
64untaken:                                          ; preds = %entry
65; CHECK-LABEL: untaken:
66; CHECK-NEXT: gc.statepoint
67; CHECK-NEXT: %obj.relocated2 = call coldcc i8 addrspace(1)*
68  call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
69  br label %merge
70
71merge:                                            ; preds = %untaken, %taken
72; CHECK-LABEL: merge:
73; CHECK-NEXT: %.0 = phi i8 addrspace(1)* [ %obj.relocated, %taken ], [ %obj.relocated2, %untaken ]
74; CHECK-NEXT: ret i8 addrspace(1)* %.0
75; When run over a function which doesn't opt in, should do nothing!
76  ret i8 addrspace(1)* %obj
77}
78
79define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) gc "ocaml" {
80; CHECK-LABEL: @test5
81entry:
82; CHECK-LABEL: entry:
83; CHECK-NEXT: gc.statepoint
84; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)*
85  %0 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) ["deopt" (i32 0, i32 -1, i32 0, i32 0, i32 0)]
86  ret i8 addrspace(1)* %obj
87}
88
89declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
90