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

[s dot bosscher at student dot tudelft dot nl]

------- Additional Comments From s dot bosscher at student dot tudelft dot nl  2004-11-03 16:52 -------
Subject: RE:  [4.0 Regression] jump threading
	 on trees is slow with switch statements with large # of cases

> No you don't know it's size or density in advance.  We're not looking
> at case values, but at the label where each case statement will jump to.

You could move the expand code for SWITCH_EXPRs out of
expand_expr, and call it from cfgexpand.c, passing the
number of outgoing edges.



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