This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Basic block reordering algorithm
On Wednesday 13 April 2005 00:18, Pat Haugen wrote:
> When we have a test block gating whether a loop should be
> entered, the new block frequency check causes the code to pick the non-loop
> path as the next block to add to the trace since the loop header block has
> a higher frequency, and hence the loop gets moved out of line.
Have you tried with the patch to re-enable the loop header copying
predictor: http://gcc.gnu.org/ml/gcc-patches/2005-03/msg02577.html?
It sounds like you might want to try that first...
Gr.
Steven