From 8f8442a498a364ebf0b620b6a654e177298554f1 Mon Sep 17 00:00:00 2001 From: Wilco Dijkstra Date: Mon, 20 Jan 2020 14:29:40 +0000 Subject: [PATCH 3/4] [AArch64] Set jump-align=4 for neoversen1 Testing shows the setting of 32:16 for jump alignment has a significant codesize cost, however it doesn't make a difference in performance. So set jump-align to 4 to get 1.6% codesize improvement. gcc/ * config/aarch64/aarch64.c (neoversen1_tunings): Set jump_align to 4. --- gcc/config/aarch64/aarch64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 641e41c3cb5..1354308ba09 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -819,7 +819,7 @@ static const struct tune_params neoversen1_tunings = 3, /* issue_rate */ AARCH64_FUSE_AES_AESMC, /* fusible_ops */ 32, /* function_align. */ - 32, /* jump_align. */ + 4, /* jump_align. */ 32, /* loop_align. */ 2, /* int_reassoc_width. */ 4, /* fp_reassoc_width. */ -- 2.25.1