forked from OSchip/llvm-project
68 lines
1.5 KiB
LLVM
68 lines
1.5 KiB
LLVM
; 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: ; mask branch [[END:BB[0-9]+_[0-9]+]]
|
|
; GCN-NEXT: s_cbranch_execz [[END]]
|
|
; 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: ; mask branch [[END:BB[0-9]+_[0-9]+]]
|
|
; GCN-NEXT: s_cbranch_execz [[END]]
|
|
; 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: ; mask branch [[END:BB[0-9]+_[0-9]+]]
|
|
; GCN-NEXT: s_cbranch_execz [[END]]
|
|
; 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 }
|