Add FunctionFamily and LLVMDbgOp enums to DXIL::Function

Saves having to do repeated string comparisons for function calls to identify if the instruction is a DXOp call or an LLVM Dbg call.
The LLVM Dbg calls are unique and the specific llvm dbg operation is stored in the DXIL::Function
The DXOp calls are not unique and the zero'th argument of the CALL Instruction is used to determine the DXOp opcode.

renderdoc/driver/shaders/dxil/dxil_bytecode.h

@@ -52,6 +52,20 @@ namespace DXIL
 static const rdcstr DXIL_FAKE_OUTPUT_STRUCT_NAME("_OUT");
 static const rdcstr DXIL_FAKE_INPUT_STRUCT_NAME("_IN");
 
+enum class FunctionFamily : uint8_t
+{
+  LLVM,
+  DXOp,
+  LLVMDbg,
+};
+
+enum class LLVMDbgOp : uint8_t
+{
+  Unknown = 0,
+  Declare,
+  Value,
+};
+
 struct BumpAllocator
 {
   BumpAllocator(size_t totalSize);
@@ -1365,6 +1379,9 @@ struct Function : public Value
 
   rdcarray<UselistEntry> uselist;
   AttachedMetadata attachedMeta;
+
+  FunctionFamily family = FunctionFamily::LLVM;
+  LLVMDbgOp llvmDbgOp = LLVMDbgOp::Unknown;
 };
 
 class LLVMOrderAccumulator