r256373 - in /trunk/gcc: ChangeLog common/confi...

Tue Jan 9 10:38:00 GMT 2018

Author: gjl
Date: Tue Jan  9 10:38:45 2018
New Revision: 256373

URL: https://gcc.gnu.org/viewcvs?rev=256373&root=gcc&view=rev
Log:
gcc/
	Don't save registers in main().
	PR target/83737
	* doc/invoke.texi (AVR Options) [-mmain-is-OS_task]: Document it.
	* config/avr/avr.opt (-mmain-is-OS_task): New target option.
	* config/avr/avr.c (avr_set_current_function): Don't error if
	naked, OS_task or OS_main are specified at the same time.
	(avr_function_ok_for_sibcall): Don't disable sibcalls for OS_task,
	OS_main.
	(avr_insert_attributes) [-mmain-is-OS_task] <main>: Add OS_task
	attribute.
	* common/config/avr/avr-common.c (avr_option_optimization_table):
	Switch on -mmain-is-OS_task for optimizing compilations.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/common/config/avr/avr-common.c
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.opt
    trunk/gcc/doc/invoke.texi