1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/20050922-1.c b/gcc/testsuite/gcc.dg/20050922-1.c
new file mode 100644
index 000000000..ed5a3c63e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/20050922-1.c
@@ -0,0 +1,47 @@
+/* This revealed a bug when rotates are expanded into
+   two shifts.  */
+
+/* { dg-do run } */
+/* { dg-options "-O1 -std=c99" } */
+
+#include <stdlib.h>
+
+#if __INT_MAX__ == 2147483647
+typedef unsigned int uint32_t;
+#elif __LONG_MAX__ == 2147483647
+typedef unsigned long uint32_t;
+#else
+#error unable to find 32-bit integer type
+#endif
+
+uint32_t
+f (uint32_t *S, int j)
+{
+  uint32_t A, B, k, L[2] = {1234, 5678};
+  int i, m;
+
+  A = B = 0;
+  for (i = 0; i < j; i++)
+    {
+      k = (S[i] + A + B) & 0xffffffffL;
+      A = S[i] =
+      ((k << (3 & 0x1f)) | ((k & 0xffffffff) >> (32 - (3 & 0x1f)))); 
+
+      m = (int) (A + B);
+      k = (L[i] + A + B) & 0xffffffffL;
+      B = L[i] =
+	((k << (m & 0x1f)) | ((k & 0xffffffff) >> (32 - (m & 0x1f))));
+    }
+  return L[0] + L[1];
+}
+
+int
+main ()
+{
+  uint32_t S[2] = {0xffff, 0xffffff};
+
+  if (f (S,2)!= 1392607300)
+    abort();
+
+  return 0;
+}