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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2019-08-13 10:39:22 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2019-08-13 10:39:22 +0000 |
| commit | 4e55aefa3ee19167a41892e4920a3e8c520aee42 (patch) | |
| tree | 3cc3785b88dfd6cf4f14338421bddae8fa44f522 | |
| parent | d5c949950c8941e945b08e82181b52a208fa3af4 (diff) | |
| download | gcc-4e55aefa3ee19167a41892e4920a3e8c520aee42.tar.gz | |
[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
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3e05090eba1..004d270bab7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 291cbb2696d..af4d8afaa5a 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -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. */ |