Re: [PATCH PR41488]Recognize more induction variables by simplifying PEELED chrec in scalar evolution

[Jeff Law <law at redhat dot com>]

On 12/10/13 23:35, Bin.Cheng wrote:
> I know little about GC, so when ggc_collect may be called (between two
> passes)? If so, I have to call free_affine_expand_cache just after the
> calling to tree_to_affine_combination_expand in SCEV because it's an
> analyzer and as you pointed out, the analyzing result is used by
> different optimizers.  The pointer map would be maintained between
> different passes if it's not instantly freed.
The garbage collector only runs between passes.  If you have roots in 
static storage, then  you'll need to decorate them so the garbage 
collector scans them.

There's a fairly extensive discussion of the garbage collector in the 
GCC internals manual.


jeff