代码拉取完成,页面将自动刷新
同步操作将从 src-openEuler/gcc 强制同步,此操作会覆盖自 Fork 仓库以来所做的任何修改,且无法恢复!!!
确定后同步将在后台操作,完成时将刷新页面,请耐心等待。
From ea059ab02ac79eba1c05d6e05cbb2590c47d7c1f Mon Sep 17 00:00:00 2001
From: zhaowenyu <804544223@qq.com>
Date: Thu, 23 Jun 2022 10:16:08 +0800
Subject: [PATCH 06/12] [Backport] ifcvt: Allow constants for
noce_convert_multiple.
Reference: https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=9b8eaa282250ad260e01d164093b597579db00d9
This lifts the restriction of not allowing constants for noce_convert_multiple.
The code later checks if a valid sequence is produced anyway.
gcc/ChangeLog:
* ifcvt.cc (noce_convert_multiple_sets): Allow constants.
(bb_ok_for_noce_convert_multiple_sets): Likewise.
---
gcc/ifcvt.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
index 977dd1bd4..2452f231c 100644
--- a/gcc/ifcvt.c
+++ b/gcc/ifcvt.c
@@ -3252,7 +3252,9 @@ noce_convert_multiple_sets (struct noce_if_info *if_info)
we'll end up trying to emit r4:HI = cond ? (r1:SI) : (r3:HI).
Wrap the two cmove operands into subregs if appropriate to prevent
that. */
- if (GET_MODE (new_val) != GET_MODE (temp))
+
+ if (!CONSTANT_P (new_val)
+ && GET_MODE (new_val) != GET_MODE (temp))
{
machine_mode src_mode = GET_MODE (new_val);
machine_mode dst_mode = GET_MODE (temp);
@@ -3263,7 +3265,8 @@ noce_convert_multiple_sets (struct noce_if_info *if_info)
}
new_val = lowpart_subreg (dst_mode, new_val, src_mode);
}
- if (GET_MODE (old_val) != GET_MODE (temp))
+ if (!CONSTANT_P (old_val)
+ && GET_MODE (old_val) != GET_MODE (temp))
{
machine_mode src_mode = GET_MODE (old_val);
machine_mode dst_mode = GET_MODE (temp);
@@ -3392,9 +3395,9 @@ bb_ok_for_noce_convert_multiple_sets (basic_block test_bb)
if (!REG_P (dest))
return false;
- if (!(REG_P (src)
- || (GET_CODE (src) == SUBREG && REG_P (SUBREG_REG (src))
- && subreg_lowpart_p (src))))
+ if (!((REG_P (src) || CONSTANT_P (src))
+ || (GET_CODE (src) == SUBREG && REG_P (SUBREG_REG (src))
+ && subreg_lowpart_p (src))))
return false;
/* Destination must be appropriate for a conditional write. */
--
2.27.0.windows.1
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。