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[AArch64] Increase default function alignment 

With -mcpu=generic the function alignment is currently 8, however almost all
supported cores prefer 16 or higher, so increase the default to 16:12.
This gives ~0.2% performance increase on SPECINT2017, while codesize is 0.12%
larger.

    gcc/
	* config/aarch64/aarch64.c (generic_tunings): Set function alignment to
	16:12.

From-SVN: r274374
This commit is contained in:
Wilco Dijkstra 2019-08-13 10:39:22 +00:00 committed by Wilco Dijkstra
parent d5c949950c
commit 4e55aefa3e
2 changed files with 6 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-08-13 Wilco Dijkstra <wdijkstr@arm.com>
* config/aarch64/aarch64.c (generic_tunings): Set function alignment to
16:12.
2019-08-13 Jozef Lawrynowicz <jozef.l@mittosystems.com>
* config/msp430/driver-msp430.c (msp430_set_driver_var): New.

2
gcc/config/aarch64/aarch64.c
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@ -712,7 +712,7 @@ static const struct tune_params generic_tunings =
4, /* memmov_cost */
2, /* issue_rate */
(AARCH64_FUSE_AES_AESMC), /* fusible_ops */
"8", /* function_align. */
"16:12", /* function_align. */
"4", /* jump_align. */
"8", /* loop_align. */
2, /* int_reassoc_width. */