[llvm] [IR][Float8] Add two kinds float8 IR type (PR #89900)

[Joshua Cranmer via llvm-commits]

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@@ -174,6 +187,8 @@ class Type {
     case FloatTyID:
     case HalfTyID:
     case BFloatTyID:
+    case Float8E5M2TyID:
+    case Float8E4M3FNTyID:
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jcranmer-intel wrote:

This type *definitely* doesn't qualify--it's lacking infinity and sNaN for one thing. I'm not familiar enough with these types to ascertain the answer for Float8E5M2.

https://github.com/llvm/llvm-project/pull/89900