https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61409
--- Comment #11 from Jeffrey A. Law <law at redhat dot com> ---
Sigh. We can't do the propagation, even if we recognize the mw_9 default
definition represents an undefined value -- because doing so would result in a
use that is not dominated by its def.
We could do duplication and essentially create
if (mini_p)
{
long int a = make_window ();
if (!PSEUDOVECTORP (a)) return rw;
mw = (void*) a - 5;
rw->pixel_width = ((rw->text_cols * (rw->column_width))
+ (rw->left_fringe_width + (rw->right_fringe_width)) + 2 *
(rw->internal_border_width));
rw->pixel_height = ((rw->text_cols * (rw->line_height)));
mw->pixel_height = rw->pixel_height;
}
else
{
rw->pixel_width = ((rw->text_cols * (rw->column_width))
+ (rw->left_fringe_width + (rw->right_fringe_width)) + 2 *
(rw->internal_border_width));
rw->pixel_height = ((rw->text_cols * (rw->line_height)));
}
And in fact, that's precisely what the code to handle joiner blocks in the jump
threader is supposed to do... Hmmm, this might be mine...
