On Wed, 2015-08-19 at 10:27 -0700, Steve Ellcey wrote:
> I am trying to create a new IPA pass to scan the routines being compiled
> by GCC and I thought I would put it in after the last IPA pass (comdats)
> so I tried to register it with:
>
> opt_pass *p = make_pass_ipa_frame_header_opt (g);
> static struct register_pass_info f =
> {p, "comdats", 1, PASS_POS_INSERT_AFTER };
> register_pass (&f);
>
> But when I build GCC I get:
>
> /scratch/sellcey/repos/header2/src/gcc/libgcc/libgcc2.c:1:0: fatal error:
> pass 'comdats' not found but is referenced by new pass 'frame-header-opt'
>
> Does anyone know why this is the case? "comdats" is what is used for
> the name of pass_ipa_comdats in ipa-comdats.c.
Is your pass of the correct type? (presumably IPA_PASS). I've run into
this a few times with custom passes (which seems to be a "gotcha");
position_pass can fail here:
/* Check if the current pass is of the same type as the new pass and
matches the name and the instance number of the reference pass. */
if (pass->type == new_pass_info->pass->type
Hope this is helpful
Dave
