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Re: Removing unnecessary ADDR_EXPRs
On Wed, 2005-05-18 at 13:34 -0700, Richard Henderson wrote:
> On Wed, May 18, 2005 at 10:53:11AM -0600, Jeffrey A Law wrote:
> > * tree-ssa-forwprop.c (forward_propagate_addr_expr): Do not
> > propagate an ADDR_EXPR if the definition and use sites are
> > in different EH regions.
> This is a bit over-conservative. I'm testing the following.
It's definitely conservative.
> * tree-ssa-forwprop.c (cfg_changed): New.
> (tidy_after_forward_propagate_addr): New.
> (forward_propagate_addr_expr): Use it, and fold_stmt_inplace.
> (forward_propagate_addr_into_variable_array_index): Likewise.
> (tree_ssa_forward_propagate_single_use_vars): Cleanup cfg if
> edges were removed.
No objections from me....