[Bug c/87691] transparent_union attribute does not work with MODE_PARTIAL_INT

[jozefl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691

--- Comment #10 from jozefl at gcc dot gnu.org ---
Author: jozefl
Date: Wed Nov  7 22:06:26 2018
New Revision: 265894

URL: https://gcc.gnu.org/viewcvs?rev=265894&root=gcc&view=rev
Log:
2018-11-07  Jozef Lawrynowicz  <joze...@mittosystems.com>

        PR c/87691

        gcc/ChangeLog:
        * stor-layout.c (compute_record_mode): Set TYPE_MODE of UNION_TYPE
        to the mode of the widest field iff the widest field has mode class
        MODE_INT, or MODE_PARTIAL_INT and the union would be passed by
        reference.

        gcc/testsuite/ChangeLog:
        * gcc.target/msp430/pr87691.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/msp430/pr87691.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/stor-layout.c
    trunk/gcc/testsuite/ChangeLog