r254378 - in /trunk/gcc: ChangeLog config/aarch...

[wilco@gcc.gnu.org]

Author: wilco
Date: Fri Nov  3 15:20:53 2017
New Revision: 254378

URL: https://gcc.gnu.org/viewcvs?rev=254378&root=gcc&view=rev
Log:
Set default sched pressure algorithm

The Arm backend sets the default sched-pressure algorithm to SCHED_PRESSURE_MODEL.
Benchmarking on AArch64 shows this speeds up floating point performance on SPEC -
eg. CactusBSSN improves by ~16%.  The gains are mostly due to less spilling,
so enable this on AArch64 by default.

    gcc/
	* config/aarch64/aarch64.c (aarch64_override_options_internal):
	Set PARAM_SCHED_PRESSURE_ALGORITHM to SCHED_PRESSURE_MODEL.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64.c