[Bug middle-end/71927] stack alignment prologue not optimized out when no local variables remain

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71927

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*, i?86-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-19
     Ever confirmed|0                           |1

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The array is only optimized away during RTL optimization which is too late for
the removal of the stack-alignment code (well, in theory not, prologue/epilouge
generation happens later but as it happens before RA we don't know whether
we'll
eventually spill a large reg or not).