1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr47881.c b/gcc/testsuite/gcc.dg/pr47881.c
new file mode 100644
index 000000000..ee1707342
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr47881.c
@@ -0,0 +1,24 @@
+/* PR debug/47881 */
+/* { dg-do compile } */
+/* { dg-options "-O -fcompare-debug -fno-dce -funroll-loops -fno-web" } */
+
+extern int data[];
+
+int
+foo (int *t, int *f, int n)
+{
+  int i = 0, a, b, c, d;
+  while (data[*f] && n)
+    n--;
+  for (; i < n; i += 4)
+    {
+      a = data[*(f++) & 0x7f];
+      c = data[*(f++) & 0x7f];
+      c = data[*(f++) & 0x7f];
+      d = data[*(f++) & 0x7f];
+      if ((a & 0x80) || (b & 0x80) || (c & 0x80) || (d & 0x80))
+	return 1;
+      *(t++) = 16;
+    }
+  return 0;
+}