re PR fortran/68151 (ICE on using select case with function of wrong type)

2015-11-07  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/68151
	* match.c (match_case_selector):  Check for invalid type.

2015-11-07  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/68151
	* gfortran.dg/pr68151.f90: New test.

From-SVN: r229938

gcc/fortran/ChangeLog

+2015-11-07  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/68151
+	* match.c (match_case_selector):  Check for invalid type.
+
 2015-11-06  David Malcolm  <dmalcolm@redhat.com>
 
 	* cpp.c (cb_cpp_error): Convert parameter from location_t to

gcc/fortran/match.c

@@ -5018,7 +5018,9 @@ gfc_free_case_list (gfc_case *p)
 }
 
 
-/* Match a single case selector.  */
+/* Match a single case selector.  Combining the requirements of F08:C830
+   and F08:C832 (R838) means that the case-value must have either CHARACTER,
+   INTEGER, or LOGICAL type.  */
 
 static match
 match_case_selector (gfc_case **cp)
@@ -5036,6 +5038,14 @@ match_case_selector (gfc_case **cp)
 	goto need_expr;
       if (m == MATCH_ERROR)
 	goto cleanup;
+
+      if (c->high->ts.type != BT_LOGICAL && c->high->ts.type != BT_INTEGER
+	  && c->high->ts.type != BT_CHARACTER)
+	{
+	  gfc_error ("Expression in CASE selector at %L cannot be %s",
+		     &c->high->where, gfc_typename (&c->high->ts));
+	  goto cleanup;
+	}
     }
   else
     {
@@ -5045,6 +5055,14 @@ match_case_selector (gfc_case **cp)
       if (m == MATCH_NO)
 	goto need_expr;
 
+      if (c->low->ts.type != BT_LOGICAL && c->low->ts.type != BT_INTEGER
+	  && c->low->ts.type != BT_CHARACTER)
+	{
+	  gfc_error ("Expression in CASE selector at %L cannot be %s",
+		     &c->low->where, gfc_typename (&c->low->ts));
+	  goto cleanup;
+	}
+
       /* If we're not looking at a ':' now, make a range out of a single
 	 target.  Else get the upper bound for the case range.  */
       if (gfc_match_char (':') != MATCH_YES)

gcc/testsuite/ChangeLog

+2015-11-07  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/68151
+	* gfortran.dg/pr68151.f90: New test.
+
 2015-11-07  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR tree-optimization/68235

gcc/testsuite/gfortran.dg/pr68151.f90

+! { dg-do compile }
+! PR fortran/68151
+! Original code contribute by Gerhard Steinmetz
+! <gerhard dot steinmetz dot fortran at t-online dot de>
+!
+program p
+   integer :: k = 1
+   select case (k)
+   case (:huge(1._4))   ! { dg-error "Expression in CASE" }
+   case (:huge(2._8))   ! { dg-error "Expression in CASE" }
+   case ((1.0,2.0))     ! { dg-error "Expression in CASE" }
+   end select
+end