[Bug debug/41343] [4.5 Regression] sysdeps/ieee754/dbl-64/dosincos.c from glibc causes excessive memory use

[matz at gcc dot gnu dot org]

------- Comment #16 from matz at gcc dot gnu dot org  2009-10-03 23:18 -------
Created an attachment (id=18700)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18700&action=view)
pr41264-test.c

Hmm, seems I used the wrong bug report to assign a nicer testcase.  Here
the comment and testcase I initially added to PR41264:
---
Found a nice testcase for exponential explosion.  It's reduced from tree.c
(make_vector_type) when building with -fprofile-generate.  The testcase needs
simply "-O2 -g" and takes a ridiculous amount of > 4GB RAM.
It's the tree-ssa-sink pass that triggers this in this case (with slight
variations in the testcase I can also make it blow up in RTL fwprop).

This means btw. that profiledbootstrap is broken.
---
Compile this with
% ./cc1 -O2 -g pr41264-test.c
and cry.


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