mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-24 05:23:45 +02:00
ebf08bfb48
If a workgroup size is known to be not greater than wavefront size the s_barrier instruction is not needed since all threads are guarantied to come to the same point at the same time. Differential Revision: https://reviews.llvm.org/D31731 llvm-svn: 299659
31 lines
809 B
LLVM
31 lines
809 B
LLVM
; RUN: llc -march=amdgcn < %s | FileCheck %s
|
|
|
|
; CHECK-LABEL: {{^}}unknown_wgs:
|
|
; CHECK: s_barrier
|
|
define amdgpu_kernel void @unknown_wgs() {
|
|
tail call void @llvm.amdgcn.s.barrier() #0
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: {{^}}flat_wgs_attr_32_128:
|
|
; CHECK: s_barrier
|
|
define amdgpu_kernel void @flat_wgs_attr_32_128() #1 {
|
|
tail call void @llvm.amdgcn.s.barrier() #0
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: {{^}}flat_wgs_attr_32_64:
|
|
; CHECK: :
|
|
; CHECK-NEXT: ; wave barrier
|
|
; CHECK-NEXT: s_endpgm
|
|
define amdgpu_kernel void @flat_wgs_attr_32_64() #2 {
|
|
tail call void @llvm.amdgcn.s.barrier() #0
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.amdgcn.s.barrier() #0
|
|
|
|
attributes #0 = { convergent nounwind }
|
|
attributes #1 = { nounwind "amdgpu-flat-work-group-size"="32,128" }
|
|
attributes #2 = { nounwind "amdgpu-flat-work-group-size"="32,64" }
|