[PATCH] PR/35659: PRE microoptimizations
Paolo Bonzini
bonzini@gnu.org
Thu Feb 5 19:56:00 GMT 2009
The PR has huge SCCs due to -fprofile-generate, which make it very
expensive to compute ANTIC. In the PR 50% of the time is spent in PR
(instead of almost nothing without -fprofile-generate).
While being relatively micro, these optimizations cut 20% of the time
PRE spends in this test case. The time is now 34% in checking builds
and 39% in release builds. Anything more requires basically a rewrite
of PRE's dataflow solution, as I understood.
Bootstrapped/regtested i686-pc-linux-gnu, ok?
Paolo
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: pr35659.patch
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20090205/12c404c7/attachment.ksh>
More information about the Gcc-patches
mailing list