On Thu, Nov 01, 2012 at 09:26:25PM +0100, Hans-Peter Nilsson wrote:
> > Attached patch was bootstrapped&tested on
>
> gcc/
> PR tree-optimization/55018
> * basic-block.h (dfs_find_deadend): New prototype.
> * cfganal.c (dfs_find_deadend): No longer static. Use bitmap
> instead of sbitmap for visited.
> (flow_dfs_compute_reverse_execute): Use dfs_find_deadend here, too.
> * dominance.c (calc_dfs_tree): If saw_unconnected,
> traverse from dfs_find_deadend of unconnected b
> instead of b directly.
>
> It seems this caused PR55168, ICE.
As Honza said, it was likely latent, and furthermore seems to be related to
the flow_dfs_compute_reverse_execute change from Steven (mentioning it
primarily what should we consider backporting if anything to release
branches).
Jakub
