https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82803
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |amonakov at gcc dot gnu.org
--- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
The main reason is __tls_get_addr emitted as a normal call on RTL (for each
GIMPLE access to the variable), but unless I'm missing something RTL doesn't
have a notion of pure/const calls, so RTL loop invariant motion and CSE cannot
clean up the redundant calls.
On i386, ___tls_get_addr is modeled as an unspec instead, which is successfully
moved out of the loop during RTL invariant motion.
