1 files changed, 63 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/loop-2g.c b/gcc/testsuite/gcc.c-torture/execute/loop-2g.c
new file mode 100644
index 000000000..8792dbf58
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/loop-2g.c
@@ -0,0 +1,63 @@
+#include <limits.h>
+
+#ifdef __unix__ /* ??? Is that good enough? */
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#ifndef MAP_ANON
+#ifdef MAP_ANONYMOUS
+#define MAP_ANON MAP_ANONYMOUS
+#else
+#define MAP_ANON MAP_FILE
+#endif
+#endif
+#ifndef MAP_FILE
+#define MAP_FILE 0
+#endif
+#ifndef MAP_FIXED
+#define MAP_FIXED 0
+#endif
+#endif
+
+#define MAP_START (void *)0x7fff8000
+#define MAP_LEN 0x10000
+
+#define OFFSET (MAP_LEN/2 - 2 * sizeof (char));
+
+f (int s, char *p)
+{
+  int i;
+  for (i = s; &p[i] < &p[40] && i >= 0; i++)
+    {
+      p[i] = -2;
+    }
+}
+
+main ()
+{
+#ifdef MAP_ANON
+  char *p;
+  int dev_zero;
+
+  dev_zero = open ("/dev/zero", O_RDONLY);
+  /* -1 is OK when we have MAP_ANON; else mmap will flag an error.  */
+  if (INT_MAX != 0x7fffffffL || sizeof (char *) != sizeof (int))
+    exit (0);
+  p = mmap (MAP_START, MAP_LEN, PROT_READ|PROT_WRITE,
+	    MAP_ANON|MAP_FIXED|MAP_PRIVATE, dev_zero, 0);
+  if (p != (char *)-1)
+    {
+      p += OFFSET;
+      p[39] = 0;
+      f (0, p);
+      if (p[39] != (char)-2)
+	abort ();
+      p[39] = 0;
+      f (-1, p);
+      if (p[39] != 0)
+	abort ();
+    }
+#endif
+  exit (0);
+}