[Bug target/78176] [MIPS] miscompiles ldxc1 with large pointers on 32-bits

[mpf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78176

--- Comment #14 from mpf at gcc dot gnu.org ---
Author: mpf
Date: Thu Jan 19 16:05:59 2017
New Revision: 244640

URL: https://gcc.gnu.org/viewcvs?rev=244640&root=gcc&view=rev
Log:
MIPS: PR target/78176 add -mlxc1-sxc1.

gcc/

        PR target/78176
        * config.gcc (supported_defaults): Add lxc1-sxc1.
        (with_lxc1_sxc1): Add validation.
        (all_defaults): Add lxc1-sxc1.
        * config/mips/mips.opt (mlxc1-sxc1): New option.
        * gcc/config/mips/mips.h (OPTION_DEFAULT_SPECS): Add a default for
        mlxc1-sxc1.
        (TARGET_CPU_CPP_BUILTINS): Add builtin_define for
        __mips_no_lxc1_sxc1.
        (ISA_HAS_LXC1_SXC1): Gate with mips_lxc1_sxc1.
        * gcc/doc/invoke.texi (-mlxc1-sxc1): Document the new option.
        * doc/install.texi (--with-lxc1-sxc1): Document the new option.

gcc/testsuite/

        * gcc.target/mips/lxc1-sxc1-1.c: New file.
        * gcc.target/mips/lxc1-sxc1-2.c: Likewise.
        * gcc.target/mips/mips.exp (mips_option_groups): Add ghost option
        HAS_LXC1.
        (mips_option_groups): Add -m[no-]lxc1-sxc1.
        (mips-dg-init): Detect default -mno-lxc1-sxc1.
        (mips-dg-options): Handle HAS_LXC1 arch upgrade/downgrade.

Added:
    trunk/gcc/testsuite/gcc.target/mips/lxc1-sxc1-1.c
    trunk/gcc/testsuite/gcc.target/mips/lxc1-sxc1-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config.gcc
    trunk/gcc/config/mips/mips.h
    trunk/gcc/config/mips/mips.opt
    trunk/gcc/doc/install.texi
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/mips/mips.exp