[Bug middle-end/41343] sysdeps/ieee754/dbl-64/dosincos.c from glibc causes excessive memory use

[aoliva at gcc dot gnu dot org]

------- Comment #2 from aoliva at gcc dot gnu dot org  2009-09-12 06:39 -------
Created an attachment (id=18572)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18572&action=view)
patch that might help alleviate the problem

This patch helped me save a lot of memory on another PPC testcase that involved
lots of expressions with equivalent values, which causes “interesting“ behavior
in var-tracking/cselib, generating a lot of RTL junk.  From your description,
it's not clear that it's the same problem, but I thought I'd post the
(unpolished) patch anyway, because a proper algorithmic fix to var-tracking
will take longer.  Even more so because I'm away for a week, starting today.  I
hope this helps.  Please let me know.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41343