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[avr-libc-dev] [bug #50987] Not all registers need to be declared volati

From: anonymous
Subject: [avr-libc-dev] [bug #50987] Not all registers need to be declared volatile
Date: Sat, 23 Dec 2017 05:33:22 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Firefox/52.0

Follow-up Comment #3, bug #50987 (project avr-libc):

As Ambroz explained, removing volatile is only safe if there are no (side)
effects. This case IMHO never happens (each register is there for a specific
purpose/effect). The registers with the least hardware side effects probably
are the GPIOn registers, which are effectively like global variables. When I
use them, it's usually in ISRs, thus, they must be declared volatile.

Voting to close the bug as wontfix.


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