Fix ~3500 analyser issues

See merge request ryubing/ryujinx!44

src/ARMeilleure/IntermediateRepresentation/Intrinsic.cs

@@ -4,7 +4,6 @@ using System.Diagnostics.CodeAnalysis;
 namespace ARMeilleure.IntermediateRepresentation
 {
     [Flags]
-    [SuppressMessage("Design", "CA1069: Enums values should not be duplicated")]
     enum Intrinsic : ushort
     {
         // X86 (SSE and AVX)

src/ARMeilleure/IntermediateRepresentation/Operand.cs

@@ -446,7 +446,7 @@ namespace ARMeilleure.IntermediateRepresentation
                 Data* data = null;
 
                 // If constant or register, then try to look up in the intern table before allocating.
-                if (kind == OperandKind.Constant || kind == OperandKind.Register)
+                if (kind is OperandKind.Constant or OperandKind.Register)
                 {
                     uint hash = (uint)HashCode.Combine(kind, type, value);
 

src/ARMeilleure/IntermediateRepresentation/OperandType.cs

@@ -16,8 +16,8 @@ namespace ARMeilleure.IntermediateRepresentation
     {
         public static bool IsInteger(this OperandType type)
         {
-            return type == OperandType.I32 ||
-                   type == OperandType.I64;
+            return type is OperandType.I32 or
+                   OperandType.I64;
         }
 
         public static RegisterType ToRegisterType(this OperandType type)