[Bug target/40648] misaligned store vectorizer patch introduced 10% runtime regression on Polyhedron test_fpu

[eres at il dot ibm dot com]

------- Comment #7 from eres at il dot ibm dot com  2009-07-05 08:12 -------
Testing test_fpu on Power7 with the power7 branch shows no significant
difference between the version compiled with the misaligned store support patch
and without it. (using -mcpu=power7 -ffast-math -funroll-loops -O3)
The version with the misaligned store support patch is ~23% faster than the
version with -fno-tree-vectorize.
So it seems like this is a tuning issue for x86-64 and might be addressed in
the cost model.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40648