adding test

Author: joaosaffran

llvm/test/CodeGen/DirectX/ContainerData/RootSignature-Parameters-Invalid-ParameterIsNotString.ll

@@ -0,0 +1,19 @@
+; RUN: not opt -passes='print<dxil-root-signature>' %s -S -o - 2>&1 | FileCheck %s
+
+; CHECK: error: Invalid format for Root Element
+; CHECK-NOT: Root Signature Definitions
+
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+
+define void @main() #0 {
+entry:
+  ret void
+}
+
+attributes #0 = { "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" }
+
+!dx.rootsignatures = !{!0}
+!0 = !{ ptr @main, !1 }
+!1 = !{ !2 }
+!2 = !{ i32 0 }