re PR tree-optimization/77880 (out of memory building recent LLVM on ppc64le with -O3)

	PR tree-optimization/77880
	* expr.c (by_pieces_ninsns): Use unsigned HOST_WIDE_INT where
	necessary.

From-SVN: r240862

gcc/ChangeLog

+2016-10-07  Bernd Schmidt  <bschmidt@redhat.com>
+
+	PR tree-optimization/77880
+	* expr.c (by_pieces_ninsns): Use unsigned HOST_WIDE_INT where
+	necessary.
+
 2016-10-07  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/77803

gcc/expr.c

@@ -785,7 +785,7 @@ by_pieces_ninsns (unsigned HOST_WIDE_INT l, unsigned int align,
 	    case COMPARE_BY_PIECES:
 	      int batch = targetm.compare_by_pieces_branch_ratio (mode);
 	      int batch_ops = 4 * batch - 1;
-	      int full = n_pieces / batch;
+	      unsigned HOST_WIDE_INT full = n_pieces / batch;
 	      n_insns += full * batch_ops;
 	      if (n_pieces % batch != 0)
 		n_insns++;