[Bug target/39585] GCC Generates Incorrect Stack Instructins for Interrupts When using -Os

[jpa at gcc dot mail.kapsi.fi]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39585

--- Comment #3 from Petteri Aimonen <jpa at gcc dot mail.kapsi.fi> 2011-04-04 
13:46:13 UTC ---
A workaround for this bug:
#define __irq__ __attribute__((interrupt("IRQ"), optimize("O2")))