[Bug rtl-optimization/87600] Fix for PRs 86939 and 87479 causes build issues for several targets

["bergner at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87600

--- Comment #6 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Nov  8 22:39:45 2018
New Revision: 265942

URL: https://gcc.gnu.org/viewcvs?rev=265942&root=gcc&view=rev
Log:
gcc/
        PR rtl-optimization/87600
        * cfgexpand.c (expand_asm_stmt): Catch illegal asm constraint usage.
        * lra-constraints.c (process_alt_operands): Skip illegal hard
        register usage.  Prefer reloading non hard register operands.

gcc/testsuite/
        PR rtl-optimization/87600
        * gcc.dg/pr87600.h: New file.
        * gcc.dg/pr87600-1.c: New test.
        * gcc.dg/pr87600-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/pr87600-1.c
    trunk/gcc/testsuite/gcc.dg/pr87600-2.c
    trunk/gcc/testsuite/gcc.dg/pr87600.h
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/lra-constraints.c
    trunk/gcc/testsuite/ChangeLog