From 4e55aefa3ee19167a41892e4920a3e8c520aee42 Mon Sep 17 00:00:00 2001 From: Wilco Dijkstra Date: Tue, 13 Aug 2019 10:39:22 +0000 Subject: [PATCH] [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 --- gcc/ChangeLog | 5 +++++ gcc/config/aarch64/aarch64.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3e05090..004d270 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-08-13 Wilco Dijkstra + + * config/aarch64/aarch64.c (generic_tunings): Set function alignment to + 16:12. + 2019-08-13 Jozef Lawrynowicz * 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 291cbb2..af4d8af 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. */ -- 2.7.4