[llvm] [MVT] Expand the MVT enum to allow more types (PR #69603)

[Jay Foad via llvm-commits]

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@@ -33,7 +33,7 @@ namespace llvm {
   /// type can be represented by an MVT.
   class MVT {
   public:
-    enum SimpleValueType : uint8_t {
+    enum SimpleValueType : uint16_t {
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jayfoad wrote:

This is doubling the size of MVT, right? Is there any measurable impact on compilation speed or memory usage?

https://github.com/llvm/llvm-project/pull/69603