| ; RUN: opt -mtriple=amdgcn-- -S -structurizecfg -si-annotate-control-flow %s | FileCheck -check-prefix=OPT %s |
| ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s |
| |
| ; Uses llvm.amdgcn.break |
| |
| ; OPT-LABEL: @break_loop( |
| ; OPT: bb1: |
| ; OPT: call i64 @llvm.amdgcn.break(i64 |
| ; OPT-NEXT: br i1 %cmp0, label %bb4, label %Flow |
| |
| ; OPT: bb4: |
| ; OPT: load volatile |
| ; OPT: xor i1 %cmp1 |
| ; OPT: call i64 @llvm.amdgcn.if.break( |
| ; OPT: br label %Flow |
| |
| ; OPT: Flow: |
| ; OPT: call i1 @llvm.amdgcn.loop(i64 |
| ; OPT: br i1 %{{[0-9]+}}, label %bb9, label %bb1 |
| |
| ; OPT: bb9: |
| ; OPT: call void @llvm.amdgcn.end.cf(i64 |
| |
| ; TODO: Can remove exec fixes in return block |
| ; GCN-LABEL: {{^}}break_loop: |
| ; GCN: s_mov_b64 [[INITMASK:s\[[0-9]+:[0-9]+\]]], 0{{$}} |
| |
| ; GCN: [[LOOP_ENTRY:BB[0-9]+_[0-9]+]]: ; %bb1 |
| ; GCN: s_or_b64 [[MASK:s\[[0-9]+:[0-9]+\]]], exec, [[INITMASK]] |
| ; GCN: s_cmp_gt_i32 s{{[0-9]+}}, -1 |
| ; GCN-NEXT: s_cbranch_scc1 [[FLOW:BB[0-9]+_[0-9]+]] |
| |
| ; GCN: ; BB#2: ; %bb4 |
| ; GCN: buffer_load_dword |
| ; GCN: v_cmp_ge_i32_e32 vcc, |
| ; GCN: s_or_b64 [[MASK]], vcc, [[INITMASK]] |
| |
| ; GCN: [[FLOW]]: |
| ; GCN: s_mov_b64 [[INITMASK]], [[MASK]] |
| ; GCN: s_andn2_b64 exec, exec, [[MASK]] |
| ; GCN-NEXT: s_cbranch_execnz [[LOOP_ENTRY]] |
| |
| ; GCN: ; BB#4: ; %bb9 |
| ; GCN-NEXT: s_or_b64 exec, exec, [[MASK]] |
| ; GCN-NEXT: s_endpgm |
| define void @break_loop(i32 %arg) #0 { |
| bb: |
| %id = call i32 @llvm.amdgcn.workitem.id.x() |
| %tmp = sub i32 %id, %arg |
| br label %bb1 |
| |
| bb1: |
| %lsr.iv = phi i32 [ undef, %bb ], [ %lsr.iv.next, %bb4 ] |
| %lsr.iv.next = add i32 %lsr.iv, 1 |
| %cmp0 = icmp slt i32 %lsr.iv.next, 0 |
| br i1 %cmp0, label %bb4, label %bb9 |
| |
| bb4: |
| %load = load volatile i32, i32 addrspace(1)* undef, align 4 |
| %cmp1 = icmp slt i32 %tmp, %load |
| br i1 %cmp1, label %bb1, label %bb9 |
| |
| bb9: |
| ret void |
| } |
| |
| declare i32 @llvm.amdgcn.workitem.id.x() #1 |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { nounwind readnone } |