RD DXIL Disassembly use DxOp enum values instead of string comparison

Added "dxOpFunctionNames" array to assert that the function name is as expected

renderdoc/driver/shaders/dxil/dxil_bytecode.h

@@ -570,6 +570,7 @@ enum class DXOp : uint32_t
   SampleCmpBias = 255,
   StartVertexLocation = 256,
   StartInstanceLocation = 257,
+  NumOpCodes = 258,
 };
 
 enum class AtomicBinOpCode : uint32_t

renderdoc/driver/shaders/dxil/dxil_reflect.cpp

@@ -2033,6 +2033,7 @@ rdcstr DoStringise(const DXIL::DXOp &el)
     STRINGISE_ENUM_CLASS(SampleCmpBias);
     STRINGISE_ENUM_CLASS(StartVertexLocation);
     STRINGISE_ENUM_CLASS(StartInstanceLocation);
+    STRINGISE_ENUM_CLASS(NumOpCodes);
   }
   END_ENUM_STRINGISE();
 }