try fix format

Author: joaosaffran

llvm/lib/Target/DirectX/DXILRootSignature.cpp

@@ -57,12 +57,16 @@ static bool parseRootSignatureElement(LLVMContext *Ctx,
 
   RootSignatureElementKind ElementKind =
       StringSwitch<RootSignatureElementKind>(ElementText->getString())
-          .Case("RootFlags", RootSignatureElementKind::RootFlags);
+          .Case("RootFlags", RootSignatureElementKind::RootFlags)
+          .Default(RootSignatureElementKind::None);
 
   switch (ElementKind) {
 
   case RootSignatureElementKind::RootFlags:
     return parseRootFlags(Ctx, MRS, Element);
+  case RootSignatureElementKind::None:
+    return reportError(Ctx,
+                       "Invalid Root Element: " + ElementText->getString());
   }
 
   return true;

llvm/lib/Target/DirectX/DXILRootSignature.h

@@ -22,7 +22,7 @@
 namespace llvm {
 namespace dxil {
 
-enum class RootSignatureElementKind { RootFlags = 1 };
+enum class RootSignatureElementKind { None = 0, RootFlags = 1 };
 
 struct ModuleRootSignature {
   uint32_t Flags = 0;

llvm/test/CodeGen/DirectX/ContainerData/RootSignature-Flags-Error.ll

@@ -0,0 +1,19 @@
+; RUN: not llc %s --filetype=obj -o -
+
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+; expected-error@-1: Invalid Root Element: NOTRootFlags
+
+
+define void @main() #0 {
+entry:
+  ret void
+}
+
+attributes #0 = { "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" }
+
+
+!dx.rootsignatures = !{!2} ; list of function/root signature pairs
+!2 = !{ ptr @main, !3 } ; function, root signature
+!3 = !{ !4 } ; list of root signature elements
+!4 = !{ !"NOTRootFlags", i32 1 } ; 1 = allow_input_assembler_input_layout