From: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date: Mon, 21 Oct 2019 10:12:18 +0000 (+0000)
Subject: [vect] Only change base alignment if more restrictive
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d2db7f790194ac690beae00f2f7956e3fe865cac;p=gcc.git

[vect] Only change base alignment if more restrictive

This patch makes sure ensure_base_align only changes alignment if the new
alignment is more restrictive.  It already did this if we were dealing with
symbols, but it now does it for all types of declarations.

gcc/ChangeLog:
2019-10-21  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* tree-vect-stmts (ensure_base_align): Only change alignment if new
	alignment is more restrictive.

From-SVN: r277238
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fbde37cf4ad..799072510e4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-10-21  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	* tree-vect-stmts (ensure_base_align): Only change alignment if new
+	alignment is more restrictive.
+
 2019-10-21  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* tree-vectorizer.h (vec_info::vector_size): New member variable.
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index d744a84fb2a..6c7b9fe9e66 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -6293,7 +6293,7 @@ ensure_base_align (dr_vec_info *dr_info)
 
       if (decl_in_symtab_p (base_decl))
 	symtab_node::get (base_decl)->increase_alignment (align_base_to);
-      else
+      else if (DECL_ALIGN (base_decl) < align_base_to)
 	{
 	  SET_DECL_ALIGN (base_decl, align_base_to);
           DECL_USER_ALIGN (base_decl) = 1;