1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/m-un-1.c b/gcc/testsuite/gcc.dg/m-un-1.c
new file mode 100644
index 000000000..ad84d44ca
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/m-un-1.c
@@ -0,0 +1,37 @@
+/* m-un-1.c: "un" for "uninitialized" */
+
+/*
+From: Jim Wilson <wilson@cygnus.com>
+Date: Wed, 6 Jul 1994 13:11:47 -0700
+To: dje@cygnus.com
+Subject: Re: devo/gcc ChangeLog.fsf stmt.c
+Cc: cvs-gcc@cygnus.com, tege@cygnus.com
+
+	How about a test case?  :-)
+
+Compile with -O -Wall and the broken compiler gives you:
+tmp.c:6: warning: `k' might be used uninitialized in this function
+The fixed compiler (and gcc 2.5.8) gives no warning.
+
+This happens to fix a performance regression in the code generated for
+while loops, but that is presumably much much harder to test for.
+*/
+
+/* { dg-do compile } */
+/* { dg-options "-O -Wall" } */
+
+int
+sub ()
+{
+  int i = 0;
+  int j = 0;
+  int k;	/* { dg-bogus "`k' might be used uninitialized" "uninitialized warning regression" } */
+
+  while (i == 0 && j == 0)
+    {
+      k = 10;
+      i = sub ();
+    }
+
+  return k;
+}