[Bug target/66015] New: align directives not propagated after __attribute__ ((__optimize__ ("O2")))

["chrbr at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66015

            Bug ID: 66015
           Summary: align directives not propagated after __attribute__
                    ((__optimize__ ("O2")))
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chrbr at gcc dot gnu.org
  Target Milestone: ---

When attribute optimize is used, the alignment flags are not reevaluated.

Consequently, the functions are not aligned as if they were with the same
global flag

for example:
__attribute__ ((__optimize__ ("O2")))
void
hooray ()
{
}

is not aligned 

The second consequence is that can_inline_edge_p fails because opts_for_fn
(caller->decl) != opts_for_fn (callee->decl)) even-though they are compiled
with the same optimization level.