re PR tree-optimization/82672 ([GRAPHITE] ICE in verify_gimple_in_cfg)

2017-10-23  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82672
	* graphite-isl-ast-to-gimple.c (graphite_copy_stmts_from_block):
	Fold the stmt if we propagated into it.

	* gfortran.dg/graphite/pr82672.f90: New testcase.

From-SVN: r254036

gcc/graphite-isl-ast-to-gimple.c

@@ -1175,6 +1175,8 @@ graphite_copy_stmts_from_block (basic_block bb, basic_block new_bb,
       ssa_op_iter iter;
       use_operand_p use_p;
       if (!is_gimple_debug (copy))
+	{
+	  bool changed = false;
 	  FOR_EACH_SSA_USE_OPERAND (use_p, copy, iter, SSA_OP_USE)
 	    {
 	      tree old_name = USE_FROM_PTR (use_p);
@@ -1190,6 +1192,10 @@ graphite_copy_stmts_from_block (basic_block bb, basic_block new_bb,
 	      if (! codegen_error_p ())
 		gsi_insert_earliest (stmts);
 	      replace_exp (use_p, new_name);
+	      changed = true;
+	    }
+	  if (changed)
+	    fold_stmt_inplace (&gsi_tgt);
 	}
 
       update_stmt (copy);