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* gcc-interface/gigi.h (gnat_stabilize_reference): Adjust prototype. * gcc-interface/decl.c (gnat_to_gnu_entity): Do not rely on const_flag to detect constant renamings. Be prepared for specific pattern of renamed object based on function calls. Create a constant object for the renaming of a NULL_EXPR or of a CONSTRUCTOR. Adjust calls to gnat_stabilize_reference and tidy up. Remove redundant tests. (elaborate_expression_1): Remove obsolete test and tidy up. * gcc-interface/trans.c (Call_to_gnu): Do not stabilize In/Out or Out parameters passed by reference. (gnat_to_gnu) <N_Selected_Component>: Remove redundant protection again side-effects. Use gnat_protect_expr instead of gnat_stabilize_reference for general protection against side-effects. * gcc-interface/utils2.c (gnat_stable_expr_p): New predicate. (gnat_save_expr): Invoke it. (gnat_protect_expr): Likewise. (gnat_stabilize_reference_1): Likewise. Remove useless propagation of TREE_THIS_NOTRAP. (gnat_stabilize_reference): Remove parameter and adjust throughout. Delete ADDR_EXDR, COMPOUND_EXPR and CONSTRUCTOR cases. Restrict CALL_EXPR case to atomic loads and tweak ERROR_MARK case. From-SVN: r223708
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