Revert "AMDGPU/SI: Do not generate s_waitcnt after ds_permute/ds_bpermute"

This reverts commit r263720.

Just confirmed that s_waitcnt is required after ds_permute/ds_bpermute.

llvm-svn: 265992

1 files changed, 3 insertions, 26 deletions

diff --git a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ds.permute.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ds.permute.ll
index 2f774abd1c6..f0ee48ff448 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ds.permute.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ds.permute.ll
@@ -4,34 +4,11 @@ declare i32 @llvm.amdgcn.ds.permute(i32, i32) #0
 
 ; FUNC-LABEL: {{^}}ds_permute:
 ; CHECK: ds_permute_b32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
+; CHECK: s_waitcnt lgkmcnt
 define void @ds_permute(i32 addrspace(1)* %out, i32 %index, i32 %src) nounwind {
-  %permute = call i32 @llvm.amdgcn.ds.permute(i32 %index, i32 %src) #0
-  store i32 %permute, i32 addrspace(1)* %out, align 4
+  %bpermute = call i32 @llvm.amdgcn.ds.permute(i32 %index, i32 %src) #0
+  store i32 %bpermute, i32 addrspace(1)* %out, align 4
   ret void
 }
 
-; FUNC-LABEL: {{^}}permute_no_waitcnt_test:
-; CHECK: s_cbranch_scc1
-; CHECK: ds_permute_b32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
-; CHECK-NOT: s_waitcnt
-define void @permute_no_waitcnt_test(i32 addrspace(1)* %out, i32 %cond) {
-entry:
-
-  %tmp = icmp eq i32 %cond, 0
-  br i1 %tmp, label %if, label %else
-
-if:                                               ; preds = %entry
-  %permute = call i32 @llvm.amdgcn.ds.permute(i32 0, i32 0) #0
-  br label %endif
-
-else:                                             ; preds = %entry
-  br label %endif
-
-endif:
-  %val = phi i32 [ %permute, %if ], [0, %else]      ; preds = %else, %if
-  store i32 %val, i32 addrspace(1)* %out, align 4
-  ret void
-}
-
-
 attributes #0 = { nounwind readnone convergent }