From: Richard Guenther <rguenther@suse.de>
Date: Sat, 19 Nov 2005 21:40:28 +0000 (+0000)
Subject: fold-const.c (fold_indirect_ref_1): Make sure we fold ARRAY_REFs of constant strings.
X-Git-Tag: releases/gcc-4.2.0~5858
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41b9109a5565194e18132b8949b1952feab6557a;p=thirdparty%2Fgcc.git

fold-const.c (fold_indirect_ref_1): Make sure we fold ARRAY_REFs of constant strings.

2005-11-19  Richard Guenther  <rguenther@suse.de>

	* fold-const.c (fold_indirect_ref_1): Make sure we fold
	ARRAY_REFs of constant strings.

From-SVN: r107229
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 02039cfe6060..446c52874c90 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2005-11-19  Richard Guenther  <rguenther@suse.de>
+
+	* fold-const.c (fold_indirect_ref_1): Make sure we fold
+	ARRAY_REFs of constant strings.
+
 2005-11-19  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.c (version_compare_spec_function): Use '%s' rather than %qs in
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index b8576fc31b80..c4dd4f955a7e 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -11523,9 +11523,15 @@ fold_indirect_ref_1 (tree type, tree op0)
     {
       tree op = TREE_OPERAND (sub, 0);
       tree optype = TREE_TYPE (op);
-      /* *&p => p */
+      /* *&p => p;  make sure to handle *&"str"[cst] here.  */
       if (type == optype)
-	return op;
+	{
+	  tree fop = fold_read_from_constant_string (op);
+	  if (fop)
+	    return fop;
+	  else
+	    return op;
+	}
       /* *(foo *)&fooarray => fooarray[0] */
       else if (TREE_CODE (optype) == ARRAY_TYPE
 	       && type == TREE_TYPE (optype))