On 6/7/07, Zdenek Dvorak <[EMAIL PROTECTED]> wrote:
Hello,
as discussed in http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01133.html,
it might be a good idea to try moving cfg to alloc pools. The patch
below does that for basic blocks (each function has a separate pool
from that its basic blocks are allocated). At the moment, the patch
breaks precompiled headers, but otherwise bootstraps and passes
regtesting.
The problem is, that it does not give any speedups (it is almost
completely compile-time neutral for compilation of preprocessed
gcc sources).
It was mainly on sources that allocate a lot of bb's that this mattered.
If you have a small number of bb's, it just doesn't matter how you
allocate them.
None of the gcc sources (except for insn-*) ever end up with that many
basic blocks.
