1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/DirectX/CBufferAccess/unused.ll b/llvm/test/CodeGen/DirectX/CBufferAccess/unused.ll
new file mode 100644
index 0000000..8c0d82e
--- /dev/null
+++ b/llvm/test/CodeGen/DirectX/CBufferAccess/unused.ll
@@ -0,0 +1,13 @@
+; RUN: opt -S -dxil-cbuffer-access -mtriple=dxil--shadermodel6.3-library %s | FileCheck %s
+; Check that we correctly ignore cbuffers that were nulled out by optimizations.
+
+%__cblayout_CB = type <{ float }>
+@CB.cb = local_unnamed_addr global target("dx.CBuffer", %__cblayout_CB) poison
+@x = external local_unnamed_addr addrspace(2) global float, align 4
+
+; CHECK-NOT: !hlsl.cbs =
+!hlsl.cbs = !{!0, !1, !2}
+
+!0 = !{ptr @CB.cb, ptr addrspace(2) @x}
+!1 = !{ptr @CB.cb, null}
+!2 = !{null, null}