vendor/llvm/llvm-release_39-r276489

1 files changed, 25 insertions, 0 deletions

diff --git a/test/CodeGen/AMDGPU/readcyclecounter.ll b/test/CodeGen/AMDGPU/readcyclecounter.ll
new file mode 100644
index 000000000000..e6d0efd0ff94
--- /dev/null
+++ b/test/CodeGen/AMDGPU/readcyclecounter.ll
@@ -0,0 +1,25 @@
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=VI -check-prefix=GCN %s
+
+declare i64 @llvm.readcyclecounter() #0
+
+; GCN-LABEL: {{^}}test_readcyclecounter:
+; SI-DAG: s_memtime s{{\[[0-9]+:[0-9]+\]}}
+; VI-DAG: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
+; GCN-DAG: s_load_dwordx2
+; GCN: lgkmcnt
+; GCN: buffer_store_dwordx2
+; GCN-NOT: lgkmcnt
+; SI: s_memtime s{{\[[0-9]+:[0-9]+\]}}
+; VI: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
+; GCN: buffer_store_dwordx2
+define void @test_readcyclecounter(i64 addrspace(1)* %out) #0 {
+  %cycle0 = call i64 @llvm.readcyclecounter()
+  store volatile i64 %cycle0, i64 addrspace(1)* %out
+
+  %cycle1 = call i64 @llvm.readcyclecounter()
+  store volatile i64 %cycle1, i64 addrspace(1)* %out
+  ret void
+}
+
+attributes #0 = { nounwind }