[llvm] [GlobalISel][LLT] Introduce FPInfo for LLT (Enable bfloat, ppc128float and others in GlobalISel) (PR #155107)

[Pierre van Houtryve via llvm-commits]

================
@@ -301,37 +486,33 @@ class LLT {
 
 private:
   /// LLT is packed into 64 bits as follows:
-  /// isScalar : 1
-  /// isPointer : 1
-  /// isVector  : 1
-  /// with 61 bits remaining for Kind-specific data, packed in bitfields
-  /// as described below. As there isn't a simple portable way to pack bits
-  /// into bitfields, here the different fields in the packed structure is
+  /// Info : 4
+  /// RawData : 60
+  /// with 61 bits of RawData remaining for Kind-specific data, packed in
+  /// bitfields as described below. As there isn't a simple portable way to pack
+  /// bits into bitfields, here the different fields in the packed structure is
   /// described in static const *Field variables. Each of these variables
   /// is a 2-element array, with the first element describing the bitfield size
   /// and the second element describing the bitfield offset.
   ///
-  /// +--------+---------+--------+----------+----------------------+
-  /// |isScalar|isPointer|isVector| RawData  |Notes                 |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    0    |   0    |    0     |Invalid               |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    0    |   1    |    0     |Tombstone Key         |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    1    |   0    |    0     |Empty Key             |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   1    |    0    |   0    |    0     |Token                 |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   1    |    0    |   0    | non-zero |Scalar                |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    1    |   0    | non-zero |Pointer               |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    0    |   1    | non-zero |Vector of non-pointer |
-  /// +--------+---------+--------+----------+----------------------+
-  /// |   0    |    1    |   1    | non-zero |Vector of pointer     |
-  /// +--------+---------+--------+----------+----------------------+
-  ///
-  /// Everything else is reserved.
+  /*
----------------
Pierre-vh wrote:

I think information would be easier to read if this was just a list, e.g.

```
* Kind: [0;4)
```

https://github.com/llvm/llvm-project/pull/155107