1 files changed, 86 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/graphite/interchange-8.c b/gcc/testsuite/gcc.dg/graphite/interchange-8.c
new file mode 100644
index 000000000..ca99dbc13
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/graphite/interchange-8.c
@@ -0,0 +1,86 @@
+#define DEBUG 0
+#if DEBUG
+#include <stdio.h>
+#endif
+
+int B[4];
+int A[4][4][4][4];
+
+static int __attribute__((noinline))
+foo (void)
+{
+  int i, j, k, l;
+
+  /* Loops (L, J) are interchanged, and then loops (J and K) are
+     interchanged.  The result is a nest starting with (K, J, L).  */
+  for (l = 0; l < 4; l++)
+    {
+      for (k = 0; k < 4; k++)
+	{
+	  for (j = 0; j < 4; j++)
+	    {
+	      for (i = 0; i < 2; i++)
+		{
+		  B[i] = A[i][k][j][l] + A[3 - i][k][j][l];
+		  B[3 - i] = A[i][k][j][l] - A[3 - i][k][j][l];
+		}
+	      A[0][k][j][l] = B[0] + B[1];
+	      A[2][k][j][l] = B[0] - B[1];
+	      A[1][k][j][l] = B[3] + B[2];
+	      A[3][k][j][l] = B[3] - B[2];
+	    }
+
+	  for (i = 0; i < 4; i++)
+	    {
+	      for (j = 0; j < 2; j++)
+		{
+		  B[j] = A[i][k][j][l] + A[i][k][3 - j][l];
+		  B[3 - j] = A[i][k][j][l] - A[i][k][3 - j][l];
+		}
+	      A[i][k][0][l] = B[0] + B[1];
+	      A[i][k][2][l] = B[0] - B[1];
+	      A[i][k][1][l] = B[3] + B[2];
+	      A[i][k][3][l] = B[3] - B[2];
+	    }
+	}
+    }
+
+  return A[0][1][0][2] + A[0][3][0][3] + A[0][2][0][2] + A[0][1][0][1] + A[3][3][0][2];
+}
+
+extern void abort ();
+
+int
+main (void)
+{
+  int i, j, k, l, res;
+
+  for (i = 0; i < 4; i++)
+    B[i] = 2;
+
+  for (i = 0; i < 4; i++)
+    for (j = 0; j < 4; j++)
+      for (k = 0; k < 4; k++)
+	for (l = 0; l < 4; l++)
+	  A[i][j][k][l] = i + j + k + l;
+
+  res = foo ();
+
+#if DEBUG
+  for (i = 0; i < 4; i++)
+    for (j = 0; j < 4; j++)
+      for (k = 0; k < 4; k++)
+	for (l = 0; l < 4; l++)
+	  fprintf (stderr, "A[%d][%d][%d][%d] = %d \n", i, j, k, l, A[i][j][k][l]);
+
+  fprintf (stderr, "res = %d \n", res);
+#endif
+
+  if (res != 424)
+    abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "will be interchanged" 2 "graphite" } } */
+/* { dg-final { cleanup-tree-dump "graphite" } } */