[Bug tree-optimization/15524] [4.0 Regression] jump threading on trees is slow with switch statements with large # of cases

kazu at cs dot umass dot edu gcc-bugzilla@gcc.gnu.org
Wed Nov 3 16:33:00 GMT 2004


------- Additional Comments From kazu at cs dot umass dot edu  2004-11-03 16:33 -------
Richard,

My patches to expand_case does not change its asymptotic behavior.

Jeff,

You might want to use SBITMAP instead of BITMAP in your patch to
expand_case because the bitmap you construct will be dense, and you know
its size in advance.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15524



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