https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120881
--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #15)
> Comment on attachment 61783 [details]
> A patch to place mcount at the function entry with shrink
>
> >@@ -493,7 +493,7 @@ ix86_using_red_zone (void)
> > static bool
> > ix86_profile_before_prologue (void)
> > {
> >- return flag_fentry != 0;
> >+ return (TARGET_64BIT && SHRINK_WRAPPING_ENABLED) || flag_fentry != 0;
>
> Should we use crtl->shrink_wrapped (or crtl->shrink_wrapped_separate) here
> instead?
crtl->shrink_wrapped isn't for checking if shrink wrapping is enabled:
/* All is okay, so do it. */
crtl->shrink_wrapped = true;
if (dump_file)
fprintf (dump_file, "Performing shrink-wrapping.\n");
...
targetm.shrink_wrap.set_handled_components (components);
crtl->shrink_wrapped_separate = true;
}
SHRINK_WRAPPING_ENABLED is for checking if shrink wrapping is enabled.
