[SVE] Remove VectorType::isScalable()

[ctetreau]

Summary

• This is a property of the instance of VectorType. If

isa<ScalableVectorType>(T) is true, then T->isScalable() would have
returned true and vice-versa. Most code that checks this function uses
the result to bail out if a vector is a scalable vector. This code will
be cleaner if it just calls isa<ScalableVectorType>(T)

[ctetreau]

rebase

[ctetreau]

ping

[sdesmalen]

This interface seems unnecessary after adding ScalableVectorType, so LGTM!

[ctetreau]

rebase

llvm/include/llvm/IR/DerivedTypes.h

#endif
 
   /// Return true if the specified type is valid as a element type.
   static bool isValidElementType(Type *ElemTy);
 
   /// Return an ElementCount instance to represent the (possibly scalable)
   /// number of elements in the vector.
   ElementCount getElementCount() const { return EC; }
 
-  /// Returns whether or not this is a scalable vector (meaning the total
-  /// element count is a multiple of the minimum).
-  bool isScalable() const { return EC.Scalable; }
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast.
   static bool classof(const Type *T) {
     return T->getTypeID() == FixedVectorTyID ||
            T->getTypeID() == ScalableVectorTyID;
   }
 };
 
 bool Type::isVectorTy() const { return isa<VectorType>(this); }