re PR c++/12181 (Wrong code with comma operator and c++)

	PR c++/12181
	* g++.dg/expr/comma1.C: New test.

From-SVN: r71182

gcc/testsuite/ChangeLog

+2003-09-07  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/12181
+	* g++.dg/expr/comma1.C: New test.
+
 2003-09-06  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/11867

gcc/testsuite/g++.dg/expr/comma1.C

+// { dg-do run }
+
+extern "C" void abort ();
+
+struct gtst
+{
+  unsigned char data[2];
+};
+
+static struct gtst s;
+
+int main(int argc, char *argv[])
+{
+  unsigned char * pc;
+  struct gtst * ps;
+  ps = &s;
+  pc = (ps->data[0]='A', ps->data);
+  if (&s.data[0] != pc)
+    abort();
+  return 0;
+}