[Bug tree-optimization/33761] non-optimal inlining heuristics pessimizes gzip SPEC score at -O3
ubizjak at gmail dot com
gcc-bugzilla@gcc.gnu.org
Wed Feb 6 18:43:00 GMT 2008
------- Comment #20 from ubizjak at gmail dot com 2008-02-06 18:42 -------
Whoa, adding -fomit-frame-pointer brings us from
(gcc -O3 -m32)
user 0m41.031s
to
(gcc -O3 -m32 -fomit-frame-pointer)
user 0m30.006s
Since -fo-f-p adds another free reg, it looks that since inlining increases
register pressure some unlucky heavy-used variable gets allocated to the stack
slot.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33761
More information about the Gcc-bugs
mailing list