[Mesa-dev] [PATCH 0/1] Use a freelist in nir_opt_dce

Thomas Helland thomashelland90 at gmail.com
Sat Dec 2 14:49:40 UTC 2017

This patch tries to reduce the number of calls to ralloc in nir_opt_dce.
Especially with scalarized shaders we have a bunch of calls to ralloc
in this pass, hurting us quite bad. See the commit message for details.

The other large caller to ralloc is nir_alu_instr_create, and it would
be nice if we could allocate groups at a time also here. I'm not sure
how we can deal with that though, as it does not allocate the same
number of items each time. I'm also working on a similar approach for
the symbol table, but that is not quite ready yet.

Thomas Helland (1):
  nir: Use a freelist in nir_opt_dce to avoid spamming ralloc

 src/compiler/nir/nir_opt_dce.c | 47 ++++++++++++++++++++++++++++--------------
 1 file changed, 32 insertions(+), 15 deletions(-)


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