r248789 - in /trunk/gcc: ChangeLog config/s390/...

[krebbel@gcc.gnu.org]

Author: krebbel
Date: Thu Jun  1 11:30:36 2017
New Revision: 248789

URL: https://gcc.gnu.org/viewcvs?rev=248789&root=gcc&view=rev
Log:
S/390: Don't fetch the return address early with ooo

We used to load the return address slot some time in advance.  This
helped on older machines to resolve the data dependencies in time.
However, it is pointless on out of order CPUs.  Disabled with that
patch.

gcc/ChangeLog:

2017-06-01  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/s390.c (s390_emit_epilogue): Disable early return
	address fetch for z10 or later.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/s390/s390.c