[AMDGPU] Add test

Author: piotrAMD

llvm/test/CodeGen/AMDGPU/barrier-elimination-gfx12.ll

@@ -0,0 +1,53 @@
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 < %s | FileCheck %s
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 < %s -global-isel | FileCheck %s
+
+; CHECK-LABEL: {{^}}signal_unknown_wgs:
+; CHECK: s_barrier_signal
+define amdgpu_kernel void @signal_unknown_wgs() {
+  tail call void @llvm.amdgcn.s.barrier.signal(i32 -1) #0
+  ret void
+}
+
+; CHECK-LABEL: {{^}}signal_flat_wgs_attr_32_128:
+; CHECK: s_barrier_signal
+define amdgpu_kernel void @signal_flat_wgs_attr_32_128() #1 {
+  tail call void @llvm.amdgcn.s.barrier.signal(i32 -1) #0
+  ret void
+}
+
+; CHECK-LABEL: {{^}}signal_flat_wgs_attr_32_64:
+; CHECK: s_barrier_signal
+define amdgpu_kernel void @signal_flat_wgs_attr_32_64() #2 {
+  tail call void @llvm.amdgcn.s.barrier.signal(i32 -1) #0
+  ret void
+}
+
+
+; CHECK-LABEL: {{^}}wait_unknown_wgs:
+; CHECK: s_barrier_wait
+define amdgpu_kernel void @wait_unknown_wgs() {
+  tail call void @llvm.amdgcn.s.barrier.wait(i16 -1) #0
+  ret void
+}
+
+; CHECK-LABEL: {{^}}wait_flat_wgs_attr_32_128:
+; CHECK: s_barrier_wait
+define amdgpu_kernel void @wait_flat_wgs_attr_32_128() #1 {
+  tail call void @llvm.amdgcn.s.barrier.wait(i16 -1) #0
+  ret void
+}
+
+; CHECK-LABEL: {{^}}wait_flat_wgs_attr_32_64:
+; CHECK: :
+; CHECK-NEXT: s_barrier_wait
+define amdgpu_kernel void @wait_flat_wgs_attr_32_64() #2 {
+  tail call void @llvm.amdgcn.s.barrier.wait(i16 -1) #0
+  ret void
+}
+
+declare void @llvm.amdgcn.s.barrier.signal(i32 immarg) #0
+declare void @llvm.amdgcn.s.barrier.wait(i16 immarg) #0
+
+attributes #0 = { convergent nounwind }
+attributes #1 = { nounwind "amdgpu-flat-work-group-size"="32,128" }
+attributes #2 = { nounwind "amdgpu-flat-work-group-size"="16,32" }