[Bug fortran/20923] gfortran slow for large array constructors

[jvdelisle at gcc dot gnu dot org]

------- Comment #13 from jvdelisle at gcc dot gnu dot org  2009-11-28 01:46 -------
Created an attachment (id=19168)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19168&action=view)
Updated patch

This exploratory patch passes all regression tests.  I have also successfully
compiled and run the polyhedron benchmarks.

I have not tested higher order arrays to see if there is a compile time
improvement yet.  Feel free to test.  What I hope to eventually do is move the
expansion functions higher up the calling chain away from gfc_is_constant_expr.

Regardless, this is gives a fairly good improvement.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20923