1 ; This is a collection of really basic tests for gc.statepoint rewriting.
2 ; RUN: opt %s -rewrite-statepoints-for-gc -S | FileCheck %s
6 ; Trivial relocation over a single call
7 define i8 addrspace(1)* @test1(i8 addrspace(1)* %obj) gc "statepoint-example" {
10 ; CHECK-NEXT: gc.statepoint
11 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
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
17 ; Two safepoints in a row (i.e. consistent liveness)
18 define i8 addrspace(1)* @test2(i8 addrspace(1)* %obj) gc "statepoint-example" {
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)*
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
31 ; A simple derived pointer
32 define i8 @test3(i8 addrspace(1)* %obj) gc "statepoint-example" {
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 addrspace(1)* %derived.relocated
39 ; CHECK-NEXT: load i8 addrspace(1)* %obj.relocated
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)
44 %a = load i8 addrspace(1)* %derived
45 %b = load i8 addrspace(1)* %obj
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.
52 define i8 addrspace(1)* @test4(i1 %cmp, i8 addrspace(1)* %obj) gc "statepoint-example" {
54 br i1 %cmp, label %taken, label %untaken
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)
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)
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
77 ; When run over a function which doesn't opt in, should do nothing!
78 define i8 addrspace(1)* @test5(i8 addrspace(1)* %obj) {
81 ; CHECK-NEXT: gc.statepoint
82 ; CHECK-NOT: %obj.relocated = call coldcc i8 addrspace(1)*
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
88 declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()*, i32, i32, ...)