From: Eric Botcazou <ebotcazou@gcc.gnu.org>
Date: Thu, 28 May 2020 17:29:42 +0000 (+0200)
Subject: Fix off-by-one error in previous commit
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2815558a2dbd0ee73de4bf01abb36d609026da6e;p=gcc.git

Fix off-by-one error in previous commit

The bitregion_end field points to the next bit after the region.

gcc/ChangeLog
	* gimple-ssa-store-merging.c (merged_store_group::can_be_merged_into):
	Fix off-by-one error.
---

diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c
index 400a0010c34..3ab614148a7 100644
--- a/gcc/gimple-ssa-store-merging.c
+++ b/gcc/gimple-ssa-store-merging.c
@@ -1874,7 +1874,7 @@ merged_store_group::can_be_merged_into (store_immediate_info *info)
 	  || stores[0]->rhs_code == BIT_INSERT_EXPR)
       && info->bitregion_start == stores[0]->bitregion_start
       && info->bitregion_end == stores[0]->bitregion_end
-      && info->bitregion_end - info->bitregion_start < MAX_FIXED_MODE_SIZE)
+      && info->bitregion_end - info->bitregion_start <= MAX_FIXED_MODE_SIZE)
     return true;
 
   if (stores[0]->rhs_code == MEM_REF
@@ -1882,7 +1882,7 @@ merged_store_group::can_be_merged_into (store_immediate_info *info)
 	  || info->rhs_code == BIT_INSERT_EXPR)
       && info->bitregion_start == stores[0]->bitregion_start
       && info->bitregion_end == stores[0]->bitregion_end
-      && info->bitregion_end - info->bitregion_start < MAX_FIXED_MODE_SIZE)
+      && info->bitregion_end - info->bitregion_start <= MAX_FIXED_MODE_SIZE)
     return true;
 
   return false;