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 12 define amdgpu_kernel void @test_barrier(i32 addrspace(1)* %out, i32 %size) #0 { 13 entry: 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 26 declare void @llvm.amdgcn.s.barrier() #1 27 declare i32 @llvm.amdgcn.workitem.id.x() #2 28 29 attributes #0 = { nounwind } 30 attributes #1 = { convergent nounwind } 31 attributes #2 = { nounwind readnone } 32
