[Bug target/81268] [avr] Support __gcc_isr pseudo-instruction for more efficient ISR prologues

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81268

--- Comment #6 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Author: aldyh
Date: Wed Sep 13 16:56:35 2017
New Revision: 252421

URL: https://gcc.gnu.org/viewcvs?rev=252421&root=gcc&view=rev
Log:
gcc/
        PR target/81754
        PR target/81268
        * config/avr/avr.opt (mgas-isr-prologues): New Var
        avr_gasisr_prologues.
        * config/avr/avr.md (gasisr, *gasisr): Use it instead of
        TARGET_GASISR_PROLOGUES.
        * config/avr/avr.c (avr_option_override): Same.
        (avr_pass_pre_proep::execute): Same.

Modified:
    branches/range-gen2/gcc/ChangeLog
    branches/range-gen2/gcc/config/avr/avr.c
    branches/range-gen2/gcc/config/avr/avr.md
    branches/range-gen2/gcc/config/avr/avr.opt