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