target/3506: weird behaviour when incrementing volatile ints

[rth@gcc.gnu.org]

Synopsis: weird behaviour when incrementing volatile ints

State-Changed-From-To: open->closed
State-Changed-By: rth
State-Changed-When: Fri Mar 29 02:42:35 2002
State-Changed-Why:
    GCC doesn't know what constitutes a reference to a volatile memory,
    so it never performs operations on them directly.  It will always
    pull the value into a register first.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=3506