1 files changed, 52 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/uninit-4.c b/gcc/testsuite/gcc.dg/uninit-4.c
new file mode 100644
index 000000000..d39ecac77
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/uninit-4.c
@@ -0,0 +1,52 @@
+/* Spurious uninit variable warnings, case 4.
+   Simplified version of cppexp.c (cpp_parse_expr).
+
+   This one is really fragile, it gets it right if you take out case
+   1, or if the structure is replaced by an int, or if the structure
+   has fewer members (!) */
+
+/* { dg-do compile } */
+/* { dg-options "-O -Wuninitialized" } */
+
+extern void abort (void);
+
+struct operation {
+    short op;
+    char rprio;
+    char flags;
+    char unsignedp;
+    long value;
+};
+
+extern struct operation cpp_lex (void);
+
+void
+cpp_parse_expr (void)
+{
+  int rprio; /* { dg-bogus "rprio" "uninitialized variable warning PR19833" } */
+  struct operation op;
+
+  for (;;)
+    {
+      op = cpp_lex ();
+
+      switch (op.op)
+	{
+	case 0:
+	  break;
+	case 1:
+	  return;
+	case 2:
+	  rprio = 1;
+	  break;
+	default:
+	  return;
+	}
+
+      if (op.op == 0)
+	return;
+
+      if (rprio != 1)
+	abort();
+    }
+}