diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-ctpop.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-ctpop.mir
index 5ca79a4d69ce7..5c60cb487ef90 100644
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-ctpop.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-ctpop.mir
@@ -202,3 +202,23 @@ body: |
     %3:vgpr(s32) = G_ADD %2, %1
     S_ENDPGM 0, implicit %3
 ...
+
+---
+name: ctpop_s64_ss
+legalized: true
+regBankSelected: true
+tracksRegLiveness: true
+
+body: |
+  bb.0:
+    liveins: $sgpr0_sgpr1
+
+    ; CHECK-LABEL: name: ctpop_s64_ss
+    ; CHECK: liveins: $sgpr0_sgpr1
+    ; CHECK: [[COPY:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
+    ; CHECK: [[S_BCNT1_I32_B64_:%[0-9]+]]:sreg_32 = S_BCNT1_I32_B64 [[COPY]], implicit-def $scc
+    ; CHECK: S_ENDPGM 0, implicit [[S_BCNT1_I32_B64_]]
+    %0:sgpr(s64) = COPY $sgpr0_sgpr1
+    %1:sgpr(s32) = G_CTPOP %0
+    S_ENDPGM 0, implicit %1
+...