1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/uninit-6-O0.c b/gcc/testsuite/gcc.dg/uninit-6-O0.c
new file mode 100644
index 000000000..e3fefe5e1
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/uninit-6-O0.c
@@ -0,0 +1,47 @@
+/* Spurious uninitialized variable warnings.
+   This one inspired by java/class.c:build_utf8_ref.  */
+
+/* { dg-do compile } */
+/* { dg-options "-Wuninitialized" } */
+
+#include <stddef.h>
+
+struct tree
+{
+    struct tree *car;
+    struct tree *cdr;
+    int type, data;
+};
+
+extern void *malloc(size_t);
+
+#define INTEGER_T 1
+#define PTR_T	  2
+
+#define APPEND(TREE, LAST, TYPE, VALUE)				\
+do {								\
+     struct tree *tmp = malloc (sizeof (struct tree));		\
+     tmp->car = 0; tmp->cdr = 0; tmp->type = TYPE;		\
+     tmp->data = VALUE;						\
+     if (TREE->car)						\
+	 LAST->cdr = tmp;					\
+     else							\
+	 TREE->car = tmp;					\
+     LAST = tmp;						\
+} while(0)
+ 
+struct tree *
+make_something(int a, int b, int c)
+{
+    struct tree *rv;
+    struct tree *field;
+
+    rv = malloc (sizeof (struct tree));
+    rv->car = 0;
+
+    APPEND(rv, field, INTEGER_T, a);  /* { dg-bogus "field" "uninitialized variable warning" { xfail *-*-* } } */
+    APPEND(rv, field, PTR_T, b);
+    APPEND(rv, field, INTEGER_T, c);
+
+    return rv;
+}