basic bloc chaining: using dominance

[Ian Lance Taylor]

Pierre Vittet <piervit@pvittet.com> writes:

> First, thanks for your help. I have looked at several function using
> calculate_dominance_info(). From what I understand, when you have
> finish to use it, you have to clear the structure by making a
> free_dominance_info().
> In the function flow_loops_find (file gcc/cfgloop.c), there is a call
> to calculate_dominance_info() without call to free_dominance_info(). I
> feel it is a bug, no?

Not in this case, no.  The caller or a later pass is responsible for
freeing it in this case.  There should ideally be a comment about this.

Ian