https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120347
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=20972
CC|richard.earnshaw at arm dot com |rearnsha at gcc dot
gnu.org
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is somewhat of a heisenbug. The instruction is unpredictable because the
increment may take place before the value to be stored is read.
Unfortunately, there's currently no way in the machine description (that I'm
aware of) to describe this restriction - I don't think you can early-clobber a
mem.
