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The RM 13.1(7/5) subclause contains the following sentences: "If the size of an object is greater than that of its subtype, the additional bits are padding bits. For an elementary object, these padding bits are normally read and updated along with the others." GNAT implements it only for objects of integer and fixed-point types. For objects of floating-point types, the padding bits are ignored (and therefore not initialized) with a warning: warning: 32 bits of "F" unused [enabled by default] Implementing it for objects of floating-point types does not seem worth the hassle, so rejecting nonconfirming size clauses is probably the cleanest approach (clauses giving the object a size lower than that of its subtype are already rejected for objects of floating-point types). gcc/ada/ChangeLog: * sem_ch13.adb (Analyze_Attribute_Definition_Clause) <Attribute_Size>: Tweak wording of existing error message for the size of all elementary objects. Move error handling for aliased objects into the block for objects and give a similar error for (nonaliased) floating-point objects.
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