[Bug tree-optimization/15255] [tree-ssa] a * 2 + a * 2 is not converted to a * 4

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-05-24 15:57 -------
The first one is because fold converted it to be (a + a) * 2 but fold should be doing this conversion.  PR 
15459 fixes the other problem in the PR, I will submitting a new patch today with more comments and 
more like the RTL combiner. 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15255