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This handles the discriminated record types of Ada: the PLACEHOLDER_EXPR is the "template" expression for the discriminant in the type definition. Now for some components, typically arrays whose upper bound is the discriminant, the compiler creates a local subtype for the component, so the code needs to be able to deal with this nested type. gcc/ChangeLog: * dwarf2out.c (loc_list_from_tree_1) <PLACEHOLDER_EXPR>: Deal with a nested context type
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