From: Jan Hubicka <jh@suse.cz>
Date: Wed, 29 May 2019 18:13:51 +0000 (+0200)
Subject: tree-ssa-alias.c (same_type_for_tbaa): Return ture if main variants are pointer equiv... 
X-Git-Tag: misc/cutover-git~5176
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=01a58e36980830b8a3dfa426f912fce51f7104c4;p=thirdparty%2Fgcc.git

tree-ssa-alias.c (same_type_for_tbaa): Return ture if main variants are pointer equivalent.

	* tree-ssa-alias.c (same_type_for_tbaa): Return ture if main
	variants are pointer equivalent.

From-SVN: r271747
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4452293257c5..a3056bfcafe8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-05-29  Jan Hubicka  <jh@suse.cz>
+
+	* tree-ssa-alias.c (same_type_for_tbaa): Return ture if main
+	variants are pointer equivalent.
+
 2019-05-29  Alejandro Martinez  <alejandro.martinezvicente@arm.com>
 
 	* config/aarch64/aarch64-c.c: Added TARGET_SVE2.
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index 33c15f52beba..3ecb337ffdf2 100644
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -787,6 +787,10 @@ same_type_for_tbaa (tree type1, tree type2)
   type1 = TYPE_MAIN_VARIANT (type1);
   type2 = TYPE_MAIN_VARIANT (type2);
 
+  /* Handle the most common case first.  */
+  if (type1 == type2)
+    return 1;
+
   /* If we would have to do structural comparison bail out.  */
   if (TYPE_STRUCTURAL_EQUALITY_P (type1)
       || TYPE_STRUCTURAL_EQUALITY_P (type2))