[Bug target/78818] msp430 persistent attribute is not applied correctly in some cases

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78818

--- Comment #2 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Thu Jun 15 13:38:52 2017
New Revision: 249222

URL: https://gcc.gnu.org/viewcvs?rev=249222&root=gcc&view=rev
Log:
Fix problems with the MSP430 port's handling of persistent data.

        PR target/78818
gcc     * config/msp430/msp430.c (msp430_data_attr): Check that it's possible
        for a variable to have a section before checking if the section has a
        name.
        Set section to.persistent if persistent attribute is set.
        Warn if .persistent attribute is used on an automatic variable.

tests   * gcc.target/msp430/pr78818-real.c: New template for tests.
        * gcc.target/msp430/pr78818-auto.c: New test.
        * gcc.target/msp430/pr78818-data-region.c: New test.
        * gcc.target/msp430/pr78818-data-sec.c: New test.
        * gcc.target/msp430/pr78818-auto-warn.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/msp430/pr78818-auto-warn.c
    trunk/gcc/testsuite/gcc.target/msp430/pr78818-auto.c
    trunk/gcc/testsuite/gcc.target/msp430/pr78818-data-region.c
    trunk/gcc/testsuite/gcc.target/msp430/pr78818-data-sec.c
    trunk/gcc/testsuite/gcc.target/msp430/pr78818-real.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/msp430/msp430.c
    trunk/gcc/testsuite/ChangeLog