re PR c/37171 (Canonical spelling optimization dependency)

	PR c/37171
	* g++.dg/ext/attrib34.C: New test.

From-SVN: r139904

gcc/testsuite/ChangeLog

+2008-09-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/37171
+	* g++.dg/ext/attrib34.C: New test.
+
 2008-09-02  Sebastian Pop  <sebastian.pop@amd.com>
 	    Tobias Grosser  <grosser@fim.uni-passau.de>
 	    Jan Sjodin  <jan.sjodin@amd.com>

gcc/testsuite/g++.dg/ext/attrib34.C

+// PR c/37171
+// { dg-do compile }
+// { dg-options "-O2 -fdump-tree-optimized" }
+
+unsigned int f1 () __attribute__((const));
+unsigned int f2 () __attribute__((__const));
+unsigned int f3 () __attribute__((__const__));
+
+unsigned int f4 ()
+{
+  return f1 () + f1 () + f1 () + f1 ()
+	 + f2 () + f2 () + f2 () + f2 ()
+	 + f3 () + f3 () + f3 () + f3 ();
+}
+
+// { dg-final { scan-tree-dump-times "= f1 \\(\\)" 1 "optimized" } }
+// { dg-final { scan-tree-dump-times "= f2 \\(\\)" 1 "optimized" } }
+// { dg-final { scan-tree-dump-times "= f3 \\(\\)" 1 "optimized" } }
+// { dg-final { cleanup-tree-dump "optimized" } }