re PR tree-optimization/68766 (internal compiler error: in…

re PR tree-optimization/68766 (internal compiler error: in expand_LOOP_VECTORIZED, at internal-fn.c:1905)

gcc/

	PR tree-optimization/68766
	* tree-vectorizer.c (vectorize_loops): Check for
	if-converted loops when debug counters are used.

gcc/testsuite/

	PR tree-optimization/68766
	* gcc.dg/pr68766.c: New test.

From-SVN: r231395

gcc/ChangeLog

+2015-12-08  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR tree-optimization/68766
+	* tree-vectorizer.c (vectorize_loops): Check for
+	if-converted loops when debug counters are used.
+
 2015-12-07  DJ Delorie  <dj@redhat.com>
 
 	* config/rl78/constraints.md (Wfr): Change to be a non-memory

gcc/testsuite/ChangeLog

+2015-12-08  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR tree-optimization/68766
+	* gcc.dg/pr68766.c: New test.
+
 2015-12-07  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/sparc/struct-ret-check.c: Rename to...

gcc/testsuite/gcc.dg/pr68766.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize -fdbg-cnt=vect_loop:1" } */
+/* { dg-additional-options "-mavx2" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-prune-output "dbg_cnt 'vect_loop' set to 1" } */
+
+int a, b, g, h;
+int c[58];
+int d[58];
+int fn1() {
+  for (; g; g++)
+    if (a)
+      c[g] = b;
+}
+
+int fn2() {
+  fn1();
+  for (; h; h++)
+    d[h] = 0;
+}

gcc/tree-vectorizer.c

@@ -536,7 +536,13 @@ vectorize_loops (void)
 	  continue;
 
         if (!dbg_cnt (vect_loop))
-	  break;
+	  {
+	    /* We may miss some if-converted loops due to
+	       debug counter.  Set any_ifcvt_loops to visit
+	       them at finalization.  */
+	    any_ifcvt_loops = true;
+	    break;
+	  }
 
 	gimple *loop_vectorized_call = vect_loop_vectorized_call (loop);
 	if (loop_vectorized_call)