From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 17 Jun 2019 10:22:39 +0000 (+0000)
Subject: 	* tree-ssa-alias.c (nonoverlapping_component_refs_p): Also truncate
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bab207332cca543f423f55dd403aff7bf7d33fbd;p=thirdparty%2Fgcc.git

	* tree-ssa-alias.c (nonoverlapping_component_refs_p): Also truncate
	access path on BIT_FIELD_REFs.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@272380 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d2f4db4a89b5..43519721ee6e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-17  Jan Hubicka  <hubicka@ucw.cz>
+
+	* tree-ssa-alias.c (nonoverlapping_component_refs_p): Also truncate
+	access path on BIT_FIELD_REFs.
+
 2019-06-17  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/90874
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index b9cdc8542495..399e06c3825b 100644
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -1268,7 +1268,8 @@ nonoverlapping_component_refs_p (const_tree x, const_tree y)
 	  if (TREE_CODE (type) == RECORD_TYPE)
 	    fieldsx.safe_push (field);
 	}
-      else if (TREE_CODE (x) == VIEW_CONVERT_EXPR)
+      else if (TREE_CODE (x) == VIEW_CONVERT_EXPR
+	       || TREE_CODE (x) == BIT_FIELD_REF)
 	fieldsx.truncate (0);
       x = TREE_OPERAND (x, 0);
     }
@@ -1284,7 +1285,8 @@ nonoverlapping_component_refs_p (const_tree x, const_tree y)
 	  if (TREE_CODE (type) == RECORD_TYPE)
 	    fieldsy.safe_push (TREE_OPERAND (y, 1));
 	}
-      else if (TREE_CODE (y) == VIEW_CONVERT_EXPR)
+      else if (TREE_CODE (y) == VIEW_CONVERT_EXPR
+	       || TREE_CODE (y) == BIT_FIELD_REF)
 	fieldsy.truncate (0);
       y = TREE_OPERAND (y, 0);
     }