------- Comment #4 from eric dot weddington at atmel dot com 2009-08-24 17:07
-------
The cli() and sei() macros from avr-libc are volatile and generate inline
assembly, which the compiler knows nothing about. The compiler is not aware
that the load of the constant into a register can be done, and should be done,
outside of your critical block.
I suggest that you write this whole code snippet in inline assembly to get the
shortest possible time with interrupts disabled.
--
eric dot weddington at atmel dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34736
