[amdgpu] Add regression test for LDS in metadata

diff --git a/llvm/test/CodeGen/AMDGPU/lower-module-lds-check-metadata.ll b/llvm/test/CodeGen/AMDGPU/lower-module-lds-check-metadata.ll
new file mode 100644 (file)
index 0000000..e6ca5bb
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/lower-module-lds-check-metadata.ll
@@ -0,0 +1,23 @@
+; RUN: llc -mcpu=gfx906 -o - < %s | FileCheck --check-prefix=CHECK %s
+target triple = "amdgcn-amd-amdhsa"
+
+; Check the group segment has size 4, not zero.
+; CHECK:       .amdhsa_kernel __device_start
+; CHECK:       .amdhsa_group_segment_fixed_size 4
+; CHECK:       .end_amdhsa_kernel
+
+@global_barrier_state = hidden addrspace(3) global i32 undef, align 4
+
+define i32 @rw() #0 {
+entry:
+  %0 = atomicrmw add i32 addrspace(3)* @global_barrier_state, i32 1 acq_rel, align 4
+  ret i32 %0
+}
+
+define amdgpu_kernel void @__device_start() {
+entry:
+  %0 = call i32 @rw()
+  ret void
+}
+
+attributes #0 = { noinline  }