[Bug tree-optimization/42216] [4.5 Regression] rev 15458[78] regress 464.h264ref peak 20%

[bernds_cb1 at t-online dot de]

------- Comment #5 from bernds_cb1 at t-online dot de  2009-12-01 15:26 -------
Code generation changes are expected for two reasons - the code became less
conservative when determining conflicts with other registers, so we can usually
rename in more cases.  There are also a few cases where we have to give up on
renaming due to multiword hard register overlaps we can't track.

Unfortunately I don't have access to spec; I'll have to think about how to
track this down.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42216