[Bug middle-end/40965] [4.5 Regression][graphite] slow compilation

[spop at gcc dot gnu dot org]

------- Comment #8 from spop at gcc dot gnu dot org  2009-08-25 21:03 -------
Disabling one of the useless gcc_asserts that verifies the consistency of the
original representation before any transform, I am down to 0 seconds for the 
data dependence test, and the following compile times for graphite:

 Graphite loop transforms:   2.60 (29%) usr   0.12 (60%) sys   2.69 (29%) wall 
  2365 kB ( 7%) ggc
 Graphite code generation:   0.14 ( 2%) usr   0.00 ( 0%) sys   0.21 ( 2%) wall 
   157 kB ( 0%) ggc
TOTAL                 :   9.09             0.20             9.37             
34582 kB

This is in the graphite branch, and so -O3 contains -floop-strip-mine and
-fgraphite-identity.
I also have tested with -floop-interchange and there is no more overhead.

I will test the patch in the graphite branch and then I will commit it to
trunk.

Sebastian


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40965