1 files changed, 86 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/slp-28.c b/gcc/testsuite/gcc.dg/vect/slp-28.c
new file mode 100644
index 000000000..41c482709
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/slp-28.c
@@ -0,0 +1,86 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 32 
+
+unsigned short in[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
+unsigned short in2[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
+unsigned short in3[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
+unsigned short check[N] = {0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18,20,21,22,23,25,26,27,28,30,31,32,33,35,36,37,38};
+unsigned short check3[N] = {0,1,2,3,4,5,6,7,8,9,10,11,5,6,7,8,9,10,11,12,13,14,15,16,10,11,12,13,14,15,16,17};
+
+int
+main1 ()
+{
+  int i;
+
+  for (i = 0; i < N/4; i++)
+    {
+      in[i*4] = in[i*4] + 5;
+      in[i*4 + 1] = in[i*4 + 1] + 5;
+      in[i*4 + 2] = in[i*4 + 2] + 5;
+      in[i*4 + 3] = in[i*4 + 3] + 5;
+
+    }
+
+  /* check results:  */
+  for (i = 0; i < N; i++)
+    {
+      if (in[i] != i+5)
+        abort ();
+    }
+
+  /* Not vectorizable because of data dependencies.  */
+  for (i = 1; i < N/4; i++)
+    {
+      in2[i*4] = in2[(i-1)*4] + 5;
+      in2[i*4 + 1] = in2[(i-1)*4 + 1] + 5;
+      in2[i*4 + 2] = in2[(i-1)*4 + 2] + 5;
+      in2[i*4 + 3] = in2[(i-1)*4 + 3] + 5;
+
+    }
+
+  /* check results:  */
+  for (i = 4; i < N; i++)
+    {
+      if (in2[i] != check[i])
+        abort ();
+    }
+  
+  /* Not vectorizable because of data dependencies: distance 3 is greater than 
+     the actual VF with SLP (2), but the analysis fail to detect that for now.  */
+  for (i = 3; i < N/4; i++)
+    {
+      in3[i*4] = in3[(i-3)*4] + 5;
+      in3[i*4 + 1] = in3[(i-3)*4 + 1] + 5;
+      in3[i*4 + 2] = in3[(i-3)*4 + 2] + 5;
+      in3[i*4 + 3] = in3[(i-3)*4 + 3] + 5;
+
+    }
+
+  /* check results:  */
+  for (i = 12; i < N; i++)
+    {
+      if (in3[i] != check3[i])
+        abort ();
+    }
+
+
+  return 0;
+}
+
+int main (void)
+{
+  check_vect ();
+
+  main1 ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  } } */
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect"  } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */
+