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[avr-libc-dev] [bug #37778] _MemoryBarrier() in cpufunc.h error on compi

From: Georg-Johann Lay
Subject: [avr-libc-dev] [bug #37778] _MemoryBarrier() in cpufunc.h error on compile
Date: Sun, 27 Jan 2013 17:28:18 +0000
User-agent: Opera/9.80 (Windows NT 5.0; U; de) Presto/2.6.30 Version/10.63

Follow-up Comment #3, bug #37778 (project avr-libc):

Question is whether or not NOP should be allowed to be moved across
ordinary memory moves.

For SEI and CLI, for example, I think this is not wanted in general.

NOP is less intrusive than SEI / CLI, of course, but avr-gcc emits
__builtin_avr_nop() with a memory clobber:



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