[Bug c/58782] GCC generates unnecessary _ITM_WU8 for local variables.

jakub at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Oct 18 09:22:00 GMT 2013


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58782

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is local, but address taken, and the address may escape to other threads. 
In this testcase that isn't a problem, because the store happens before the
address is taken, but that would require extra analysis - address taken
automatic variables are not in SSA form and the flag that it is addressable is
just a global flag.



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