re PR fortran/71204 (ICE with -O0 in expand_expr_real_1, at expr.c:9651)

	PR fortran/71204
	* frontend-passes.c (realloc_string_callback): Clear inserted_block
	and changed_statement before calling create_var.

	* gfortran.dg/pr71204.f90: New test.

From-SVN: r236525

gcc/fortran/ChangeLog

+2016-05-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR fortran/71204
+	* frontend-passes.c (realloc_string_callback): Clear inserted_block
+	and changed_statement before calling create_var.
+
 2016-05-15  Harald Anlauf  <anlauf@gmx.de>
 
 	PR fortran/69603

gcc/fortran/frontend-passes.c

@@ -174,8 +174,10 @@ realloc_string_callback (gfc_code **c, int *walk_subtrees ATTRIBUTE_UNUSED,
 
   if (!gfc_check_dependency (expr1, expr2, true))
     return 0;
-  
+
   current_code = c;
+  inserted_block = NULL;
+  changed_statement = NULL;
   n = create_var (expr2, "trim");
   co->expr2 = n;
   return 0;

gcc/testsuite/ChangeLog

+2016-05-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR fortran/71204
+	* gfortran.dg/pr71204.f90: New test.
+
 2016-05-20  Cesar Philippidis  <cesar@codesourcery.com>
 
 	* gcc.target/nvptx/sincos.c: New test.

gcc/testsuite/gfortran.dg/pr71204.f90

+! PR fortran/71204
+! { dg-do compile }
+! { dg-options "-O0" }
+
+module pr71204
+  character(10), allocatable :: z(:)
+end module
+
+subroutine s1
+  use pr71204
+  z(2) = z(1)
+end
+
+subroutine s2
+  use pr71204
+  z(2) = z(1)
+end