[Ada] Fix invalid memory access on finalization of class-wide type

This patch corrects issues in the compiler whereby finalization of a
heap- allocated class-wide type may cause an invalid memory read at
runtime when the type in question contains a component whose type has a
large alignment.

gcc/ada/

	* exp_attr.adb (Expand_N_Attribute_Reference) <Attribute_Tag>:
	Deal specifically wth class-wide equivalent types without a
	parent.
	* exp_util.adb (Build_Allocate_Deallocate_Proc): Extract
	allocator node for calculation of alignment actual and modify
	alignment for allocators of class-wide types with associated
	expressions.
	(Make_CW_Equivalent_Type): Handle interface types differently
	when generating the equivalent record.
	* sem_aux.adb (First_Tag_Component): Accept class-wide
	equivalent types too.

0 files changed, 0 insertions, 0 deletions