[Bug c++/41109] [4.5 regression] Argument flagged as unused despite use in sizeof()

[jason at gcc dot gnu dot org]

------- Comment #4 from jason at gcc dot gnu dot org  2009-08-24 21:32 -------
Subject: Bug 41109

Author: jason
Date: Mon Aug 24 21:31:54 2009
New Revision: 151061

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151061
Log:
        PR c++/41109
        PR c++/41110
        PR c++/41134
        * cp-tree.h (DECL_ODR_USED): New macro.
        (struct lang_decl_base): Add odr_used flag.
        * decl.c (duplicate_decls): Propagate it.  Use it for error.
        * pt.c (register_specialization): Use it for error.
        * decl2.c (mark_used): Use it as gating flag rather than TREE_USED.
        (cp_write_global_declarations): Use it for error.
        (tree_used_ok): Remove.
        * cp-tree.h: Remove tree_used_ok.
        * call.c (build_call_a): Don't call it.
        * init.c (build_offset_ref): Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wunused-17.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/decl2.c
    trunk/gcc/cp/init.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41109