1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/R600/missing-store.ll b/test/CodeGen/R600/missing-store.ll
new file mode 100644
index 0000000..5346046
--- /dev/null
+++ b/test/CodeGen/R600/missing-store.ll
@@ -0,0 +1,26 @@
+; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=FUNC -check-prefix=SI %s
+
+@ptr_load = addrspace(3) global i32 addrspace(2)* undef, align 8
+
+; Make sure when the load from %ptr2 is folded the chain isn't lost,
+; resulting in losing the store to gptr
+
+; FUNC-LABEL: {{^}}missing_store_reduced:
+; SI: ds_read_b64
+; SI: buffer_store_dword
+; SI: buffer_load_dword
+; SI: buffer_store_dword
+; SI: s_endpgm
+define void @missing_store_reduced(i32 addrspace(1)* %out, i32 addrspace(1)* %gptr) #0 {
+  %ptr0 = load i32 addrspace(2)* addrspace(3)* @ptr_load, align 8
+  %ptr2 = getelementptr inbounds i32 addrspace(2)* %ptr0, i64 2
+
+  store i32 99, i32 addrspace(1)* %gptr, align 4
+  %tmp2 = load i32 addrspace(2)* %ptr2, align 4
+
+  store i32 %tmp2, i32 addrspace(1)* %out, align 4
+  ret void
+}
+
+attributes #0 = { nounwind }
+