* tree.c (free_lang_data_in_one_sizepos): New inline function.
(free_lang_data_in_type): Call it on TYPE_{MIN|MAX}_VALUE of numerical
types. Call it on TYPE_SIZE and TYPE_SIZE_UNIT of all types.
(free_lang_data_in_decl): Call it on DECL_SIZE and DECL_SIZE_UNIT of
all decls. Call it on DECL_FIELD_OFFSET of fields.
(find_decls_types_r): Follow DECL_VALUE_EXPR.
(iterative_hash_expr) <PLACEHOLDER_EXPR>: New case.
From-SVN: r159039
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