[Bug c++/81922] [6/7/8 Regression] ICE in output_constructor_regular_field, at varasm.c:5030

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81922

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 15 20:20:00 2017
New Revision: 255703

URL: https://gcc.gnu.org/viewcvs?rev=255703&root=gcc&view=rev
Log:
        PR c++/80135
        PR c++/81922
        * typeck2.c (digest_init_r): Change nested argument type from bool to
        int.  Use code instead of TREE_CODE (type) where possible.  If
        nested == 2, diagnose initialization of flexible array member with
        STRING_CST.  Pass nested to process_init_constructor.  Formatting fix.
        (digest_init, digest_init_flags): Adjust digest_init_r caller.
        (massage_init_elt): Add nested argument.  Pass 2 instead of 1 to
        digest_init_r's nested argument if nested is non-zero.
        (process_init_constructor_array): Add nested argument.  If nested == 2,
        diagnose initialization of flexible array member with non-empty
        braced enclosed list.  Pass nested to massage_init_elt.
        (process_init_constructor_record, process_init_constructor_union): Add
        nested argument, pass it to massage_init_elt.
        (process_init_constructor): Add nested argument, pass it to
        process_init_constructor_{array,record,union}.
        * init.c (find_field_init): Renamed to ...
        (find_flexarray_init): ... this.  Return NULL_TREE if init is
        error_mark_node.  Don't look through nested CONSTRUCTORs.
        (warn_placement_new_too_small): Adjust caller.

        * g++.dg/warn/Wplacement-new-size-1.C (fBx1): Initialize nested
        flexible array member only with {}.  Add dg-warning.
        (fBx2, fBx3): Remove.
        * g++.dg/warn/Wplacement-new-size-2.C (fBx1): Initialize nested
        flexible array member only with {}.  Add dg-warning.
        (fBx2, fBx3): Remove.
        * g++.dg/warn/Wplacement-new-size-6.C: New test.
        * g++.dg/ext/flexary13.C (main): Remove test for initialization
        of nested flexible array member with non-empty initializer.
        * g++.dg/ext/flexary25.C: New test.
        * g++.dg/ext/flexary26.C: New test.
        * g++.dg/ext/flexary27.C: New test.
        * g++.dg/parse/pr43765.C: Expect diagnostics about initialization
        of nested flexible array member with non-empty initializer.  Expect
        C++2A diagnostics about mixing of designated and non-designated
        initializers.

Added:
    trunk/gcc/testsuite/g++.dg/ext/flexary25.C
    trunk/gcc/testsuite/g++.dg/ext/flexary26.C
    trunk/gcc/testsuite/g++.dg/ext/flexary27.C
    trunk/gcc/testsuite/g++.dg/warn/Wplacement-new-size-6.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/init.c
    trunk/gcc/cp/typeck2.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/ext/flexary13.C
    trunk/gcc/testsuite/g++.dg/parse/pr43765.C
    trunk/gcc/testsuite/g++.dg/warn/Wplacement-new-size-1.C
    trunk/gcc/testsuite/g++.dg/warn/Wplacement-new-size-2.C