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

[Ryan Cowan via llvm-commits]

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@@ -217,10 +367,14 @@ class LLT {
   /// but the new element size. Otherwise, return the new element type. Invalid
   /// for pointer types. For pointer types, use changeElementType.
   constexpr LLT changeElementSize(unsigned NewEltSize) const {
-    assert(!isPointerOrPointerVector() &&
+    assert(!isPointerOrPointerVector() && !(isFloat() || isFloatVector()) &&
            "invalid to directly change element size for pointers");
-    return isVector() ? LLT::vector(getElementCount(), NewEltSize)
-                      : LLT::scalar(NewEltSize);
+    return isVector()
+               ? LLT::vector(getElementCount(), getElementType().isInteger()
+                                                    ? LLT::integer(NewEltSize)
+                                                    : LLT::scalar(NewEltSize))
+           : isInteger() ? LLT::integer(NewEltSize)
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HolyMolyCowMan wrote:

And I guess bfloats?

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