1; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX8 -check-prefix=NOAUTO %s
2; RUN: llc -march=amdgcn -mattr=+auto-waitcnt-before-barrier -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX8 -check-prefix=AUTO %s
3; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -check-prefix=NOAUTO %s
4; RUN: llc -march=amdgcn -mcpu=gfx900 -mattr=+auto-waitcnt-before-barrier -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -check-prefix=AUTO %s
5
6; GCN-LABEL: {{^}}test_barrier:
7; GFX8: buffer_store_dword
8; GFX9: global_store_dword
9; NOAUTO: s_waitcnt
10; AUTO-NOT: s_waitcnt
11; GCN: s_barrier
12define amdgpu_kernel void @test_barrier(i32 addrspace(1)* %out, i32 %size) #0 {
13entry:
14  %tmp = call i32 @llvm.amdgcn.workitem.id.x()
15  %tmp1 = getelementptr i32, i32 addrspace(1)* %out, i32 %tmp
16  store i32 %tmp, i32 addrspace(1)* %tmp1
17  call void @llvm.amdgcn.s.barrier()
18  %tmp3 = sub i32 %size, 1
19  %tmp4 = sub i32 %tmp3, %tmp
20  %tmp5 = getelementptr i32, i32 addrspace(1)* %out, i32 %tmp4
21  %tmp6 = load i32, i32 addrspace(1)* %tmp5
22  store i32 %tmp6, i32 addrspace(1)* %tmp1
23  ret void
24}
25
26declare void @llvm.amdgcn.s.barrier() #1
27declare i32 @llvm.amdgcn.workitem.id.x() #2
28
29attributes #0 = { nounwind }
30attributes #1 = { convergent nounwind }
31attributes #2 = { nounwind readnone }
32