| ; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=hawaii < %s | FileCheck -enable-var-scope -check-prefix=GCN %s |
| |
| ; A call should be skipped if all lanes are zero, since we don't know |
| ; what side effects should be avoided inside the call. |
| define hidden void @func() #1 { |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}if_call: |
| ; GCN: s_and_saveexec_b64 |
| ; GCN-NEXT: s_cbranch_execz [[END:.LBB[0-9]+_[0-9]+]] |
| ; GCN: s_swappc_b64 |
| ; GCN: [[END]]: |
| define void @if_call(i32 %flag) #0 { |
| %cc = icmp eq i32 %flag, 0 |
| br i1 %cc, label %call, label %end |
| |
| call: |
| call void @func() |
| br label %end |
| |
| end: |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}if_asm: |
| ; GCN: s_and_saveexec_b64 |
| ; GCN-NEXT: s_cbranch_execz [[END:.LBB[0-9]+_[0-9]+]] |
| ; GCN: ; sample asm |
| ; GCN: [[END]]: |
| define void @if_asm(i32 %flag) #0 { |
| %cc = icmp eq i32 %flag, 0 |
| br i1 %cc, label %call, label %end |
| |
| call: |
| call void asm sideeffect "; sample asm", ""() |
| br label %end |
| |
| end: |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}if_call_kernel: |
| ; GCN: s_and_saveexec_b64 |
| ; GCN-NEXT: s_cbranch_execz .LBB3_2 |
| ; GCN: s_swappc_b64 |
| define amdgpu_kernel void @if_call_kernel() #0 { |
| %id = call i32 @llvm.amdgcn.workitem.id.x() |
| %cc = icmp eq i32 %id, 0 |
| br i1 %cc, label %call, label %end |
| |
| call: |
| call void @func() |
| br label %end |
| |
| end: |
| ret void |
| } |
| |
| declare i32 @llvm.amdgcn.workitem.id.x() #2 |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { nounwind noinline } |
| attributes #2 = { nounwind readnone speculatable } |