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

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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
This commit is contained in:
Wilco Dijkstra 2019-11-19 14:20:12 +00:00 committed by Wilco Dijkstra
parent 89842a5104
commit 2485170158
2 changed files with 9 additions and 3 deletions
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6
gcc/ChangeLog
View File

@ -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

6
gcc/config/arm/arm-cpus.in
View File

@ -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