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

[Matt Arsenault via llvm-commits]

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@@ -39,68 +39,149 @@ class raw_ostream;
 
 class LLT {
 public:
+  enum class FPVariant {
+    IEEE_FLOAT = 0x0,
+    BRAIN_FLOAT = 0x1,     // BRAIN_FLOAT
+    PPC128_FLOAT = 0x2,    // PPC128_FLOAT
+    EXTENDED_FP80 = 0x3,   // FP80
+    TENSOR_FLOAT32 = 0x4,  // TENSOR_FLOAT32
+    VARIANT_FLOAT_5 = 0x5, // UNASSIGNED
+    VARIANT_FLOAT_6 = 0x6, // UNASSIGNED
+    VARIANT_FLOAT_7 = 0x7, // UNASSIGNED
+  };
+
+  enum class Kind : uint64_t {
+    INVALID = 0b0000,
+    ANY_SCALAR = 0b0001,
+    INTEGER = 0b0010,
+    FLOAT = 0b0011,
+    POINTER = 0b0100,
+    VECTOR_ANY = 0b0101,
+    VECTOR_INTEGER = 0b0110,
+    VECTOR_FLOAT = 0b0111,
+    VECTOR_POINTER = 0b1000,
+  };
+
+  constexpr static Kind toVector(Kind Ty) {
+    if (Ty == Kind::POINTER)
+      return Kind::VECTOR_POINTER;
+
+    if (Ty == Kind::INTEGER)
+      return Kind::VECTOR_INTEGER;
+
+    if (Ty == Kind::FLOAT)
+      return Kind::VECTOR_FLOAT;
+
+    return Kind::VECTOR_ANY;
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arsenm wrote:

I assume the bit layout of the Kinds above was to make this conversion a simple bit mask operation. Does this actually codegen to that, or should you rewrite it as such? 

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