[Bug middle-end/23294] fold does not fold a*2-a to a

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-10 
00:45 -------
Here is an example which is __not__ folded back and shows that we don't 
optimize it on the RTL level at 
least for i686:
int f(int a)
{
  return a*6-a;
}
int f1(int a)
{
  return a*5;
}

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23294