From: Wilco Dijkstra <wdijkstr@arm.com>
Date: Tue, 19 Nov 2019 14:20:12 +0000 (+0000)
Subject: [Arm] Set Armv7-A tune to Cortex-A53
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=24851701582dd5d3cfb39d946c949289756b7553;p=gcc.git

[Arm] Set Armv7-A tune to Cortex-A53

By default Armv7-A tunes for Cortex-A8. This is an ancient core
today and the settings are no longer useful for newer cores. So
switch to Cortex-A53 tuning since it works well across a wide range
of modern cores.

On SPECINT2006 the performance gain is 0.7% compared to Cortex-A8 tuning,
and codesize reduces by 0.2%.

    gcc/
	* config/arm/arm-cpus.in (armv7): Set tune to Cortex-A53.
	(armv7-a): Likewise.
	(armv7ve): Likewise.

From-SVN: r278447
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 99d6a51d51b..db83c917065 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-11-19  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* config/arm/arm-cpus.in (armv7): Set tune to Cortex-A53.
+	(armv7-a): Likewise.
+	(armv7ve): Likewise.
+
 2019-11-19  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/92581
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 50379a0a10a..44e6cc6bdb6 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -415,7 +415,7 @@ begin arch armv6s-m
 end arch armv6s-m
 
 begin arch armv7
- tune for cortex-a8
+ tune for cortex-a53
  tune flags CO_PROC
  base 7
  isa ARMv7
@@ -426,7 +426,7 @@ begin arch armv7
 end arch armv7
 
 begin arch armv7-a
- tune for cortex-a8
+ tune for cortex-a53
  tune flags CO_PROC
  base 7A
  profile A
@@ -451,7 +451,7 @@ begin arch armv7-a
 end arch armv7-a
 
 begin arch armv7ve
- tune for cortex-a8
+ tune for cortex-a53
  tune flags CO_PROC
  base 7A
  profile A