re PR fortran/20869 (EXTERNAL and INTRINSIC cannot be used together)

2006-01-18  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/20869
	PR fortran/20875
	PR fortran/25024
	* symbol.c (check_conflict): Add pointer valued elemental
	functions and internal procedures with the external attribute
	to the list of conflicts.
	(gfc_add_attribute): New catch-all function to perform the
	checking of symbol attributes for attribute declaration
	statements.
	* decl.c (attr_decl1): Call gfc_add_attribute for each of -
	(gfc_match_external, gfc_match_intent, gfc_match_intrinsic,
	gfc_match_pointer, gfc_match_dimension, gfc_match_target):
	Remove spurious calls to checks in symbol.c.  Set the
	attribute directly and use the call to attr_decl() for
	checking.
	* gfortran.h:  Add prototype for gfc_add_attribute.

	PR fortran/25785
	* resolve.c (resolve_function): Exclude PRESENT from assumed size
	argument checking. Replace strcmp's with comparisons with generic
	codes.

2006-01-18  Paul Thomas  <pault@gcc.gnu.org>
	    Steven G. Kargl  <kargls@comcast.net>

	PR fortran/20869
	* gfortran.dg/intrinsic_external_1.f90: New test.

	PR fortran/20875.
	* gfortran.dg/elemental_pointer_1.f90: New test.

	PR fortran/25024
	* gfortran.dg/external_procedures_1.f90: New test.

	PR fortran/25785
	gfortran.dg/assumed_present.f90: New test.

Co-Authored-By: Steven G. Kargl <kargls@comcast.net>

From-SVN: r109899

gcc/fortran/ChangeLog

+2006-01-18  Paul Thomas  <pault@gcc.gnu.org>
+
+	PR fortran/20869
+	PR fortran/20875
+	PR fortran/25024
+	* symbol.c (check_conflict): Add pointer valued elemental
+	functions and internal procedures with the external attribute
+	to the list of conflicts.
+	(gfc_add_attribute): New catch-all function to perform the
+	checking of symbol attributes for attribute declaration
+	statements.
+	* decl.c (attr_decl1): Call gfc_add_attribute for each of -
+	(gfc_match_external, gfc_match_intent, gfc_match_intrinsic,
+	gfc_match_pointer, gfc_match_dimension, gfc_match_target):
+	Remove spurious calls to checks in symbol.c.  Set the
+	attribute directly and use the call to attr_decl() for
+	checking.
+	* gfortran.h:  Add prototype for gfc_add_attribute.
+
+	PR fortran/25785
+	* resolve.c (resolve_function): Exclude PRESENT from assumed size
+	argument checking. Replace strcmp's with comparisons with generic
+	codes.
+
 2006-01-16  Rafael Ávila de Espíndola  <rafael.espindola@gmail.com>
 
 	* gfortranspec.c (lang_specific_spec_functions): Remove.

gcc/fortran/decl.c

@@ -3154,6 +3154,12 @@ attr_decl1 (void)
 	goto cleanup;
     }
 
+  if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
+    {
+      m = MATCH_ERROR;
+      goto cleanup;
+    }
+
   if ((current_attr.external || current_attr.intrinsic)
       && sym->attr.flavor != FL_PROCEDURE
       && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
@@ -3361,7 +3367,7 @@ gfc_match_external (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_external (&current_attr, NULL);
+  current_attr.external = 1;
 
   return attr_decl ();
 }
@@ -3378,7 +3384,7 @@ gfc_match_intent (void)
     return MATCH_ERROR;
 
   gfc_clear_attr (&current_attr);
-  gfc_add_intent (&current_attr, intent, NULL);	/* Can't fail */
+  current_attr.intent = intent;
 
   return attr_decl ();
 }
@@ -3389,7 +3395,7 @@ gfc_match_intrinsic (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_intrinsic (&current_attr, NULL);
+  current_attr.intrinsic = 1;
 
   return attr_decl ();
 }
@@ -3400,7 +3406,7 @@ gfc_match_optional (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_optional (&current_attr, NULL);
+  current_attr.optional = 1;
 
   return attr_decl ();
 }
@@ -3423,7 +3429,7 @@ gfc_match_pointer (void)
   else
     {
       gfc_clear_attr (&current_attr);
-      gfc_add_pointer (&current_attr, NULL);
+      current_attr.pointer = 1;
     
       return attr_decl ();
     }
@@ -3435,7 +3441,7 @@ gfc_match_allocatable (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_allocatable (&current_attr, NULL);
+  current_attr.allocatable = 1;
 
   return attr_decl ();
 }
@@ -3446,7 +3452,7 @@ gfc_match_dimension (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_dimension (&current_attr, NULL, NULL);
+  current_attr.dimension = 1;
 
   return attr_decl ();
 }
@@ -3457,7 +3463,7 @@ gfc_match_target (void)
 {
 
   gfc_clear_attr (&current_attr);
-  gfc_add_target (&current_attr, NULL);
+  current_attr.target = 1;
 
   return attr_decl ();
 }

gcc/fortran/gfortran.h

@@ -1700,6 +1700,7 @@ void gfc_get_component_attr (symbol_attribute *, gfc_component *);
 
 void gfc_set_sym_referenced (gfc_symbol * sym);
 
+try gfc_add_attribute (symbol_attribute *, locus *);
 try gfc_add_allocatable (symbol_attribute *, locus *);
 try gfc_add_dimension (symbol_attribute *, const char *, locus *);
 try gfc_add_external (symbol_attribute *, locus *);

gcc/fortran/resolve.c

@@ -1235,16 +1235,17 @@ resolve_function (gfc_expr * expr)
     }
 
   else if (expr->value.function.actual != NULL
-      && expr->value.function.isym != NULL
-      && strcmp (expr->value.function.isym->name, "lbound"))
+	     && expr->value.function.isym != NULL
+	     && expr->value.function.isym->generic_id != GFC_ISYM_LBOUND
+	     && expr->value.function.isym->generic_id != GFC_ISYM_PRESENT)
     {
       /* Array instrinsics must also have the last upper bound of an
 	 asumed size array argument.  UBOUND and SIZE have to be
 	 excluded from the check if the second argument is anything
 	 than a constant.  */
       int inquiry;
-      inquiry = strcmp (expr->value.function.isym->name, "ubound") == 0
-		  || strcmp (expr->value.function.isym->name, "size") == 0;
+      inquiry = expr->value.function.isym->generic_id == GFC_ISYM_UBOUND
+		  || expr->value.function.isym->generic_id == GFC_ISYM_SIZE;
 	    
       for (arg = expr->value.function.actual; arg; arg = arg->next)
 	{

gcc/fortran/symbol.c

@@ -311,11 +311,20 @@ check_conflict (symbol_attribute * attr, const char * name, locus * where)
   conf (pointer, target);
   conf (pointer, external);
   conf (pointer, intrinsic);
+  conf (pointer, elemental);
+
   conf (target, external);
   conf (target, intrinsic);
   conf (external, dimension);   /* See Fortran 95's R504.  */
 
   conf (external, intrinsic);
+    
+  if (attr->if_source || attr->contained)
+    {
+      conf (external, subroutine);
+      conf (external, function);
+    }
+
   conf (allocatable, pointer);
   conf (allocatable, dummy);	/* TODO: Allowed in Fortran 200x.  */
   conf (allocatable, function);	/* TODO: Allowed in Fortran 200x.  */
@@ -585,6 +594,16 @@ duplicate_attr (const char *attr, locus * where)
 
 
 try
+gfc_add_attribute (symbol_attribute * attr, locus * where)
+{
+
+  if (check_used (attr, NULL, where) || check_done (attr, where))
+    return FAILURE;
+
+  return check_conflict (attr, NULL, where);
+}
+
+try
 gfc_add_allocatable (symbol_attribute * attr, locus * where)
 {
 

gcc/testsuite/ChangeLog

+2006-01-18  Paul Thomas  <pault@gcc.gnu.org>
+	    Steven G. Kargl  <kargls@comcast.net>
+
+	PR fortran/20869
+	* gfortran.dg/intrinsic_external_1.f90: New test.
+
+	PR fortran/20875.
+	* gfortran.dg/elemental_pointer_1.f90: New test.
+
+	PR fortran/25024
+	* gfortran.dg/external_procedures_1.f90: New test.
+
+	PR fortran/25785
+	gfortran.dg/assumed_present.f90: New test.
+
 2006-01-18  Jakub Jelinek  <jakub@redhat.com>
 
 	* g++.dg/parse/lookup5.C: New test.

gcc/testsuite/gfortran.dg/assumed_present.f90

+! { dg-do compile }
+! This tests the fix for the regression PR25785, where line 7 started
+! generating an assumed size error.
+! Contributed by Dale Ranta  <dir@lanl.gov>
+      subroutine my_sio_file_write_common(data_c1)
+        character,   intent(in), optional :: data_c1(*)
+        if (present(data_c1)) then
+        endif
+      end subroutine my_sio_file_write_common

gcc/testsuite/gfortran.dg/elemental_pointer_1.f90

+! { dg-do compile }
+! Tests the fix for pr20875.
+! Note 12.7.1 "For a function, the result shall be scalar and shall not have the POINTER attribute."
+MODULE Test
+CONTAINS
+  ELEMENTAL FUNCTION LL(I)
+    INTEGER, INTENT(IN) :: I
+    INTEGER :: LL
+    POINTER  :: LL ! { dg-error " POINTER attribute conflicts with ELEMENTAL attribute" }
+  END FUNCTION LL
+END MODULE Test

gcc/testsuite/gfortran.dg/external_procedures_1.f90

+! { dg-do compile }
+! This tests the patch for PR25024.
+
+! PR25024 - The external attribute for subroutine a would cause an ICE.
+  subroutine A ()
+    EXTERNAL A  ! { dg-error "EXTERNAL attribute conflicts with SUBROUTINE" }
+  END
+function ext (y)
+  real ext, y
+  external ext      ! { dg-error "EXTERNAL attribute conflicts with FUNCTION" }
+  ext = y * y
+end function ext
+
+function ext1 (y)
+  real ext1, y
+  external z        ! OK no conflict
+  ext1 = y * y
+end function ext1
+
+program main
+  real ext, inval
+  external ext       ! OK, valid external reference.
+  external main      ! { dg-error "PROGRAM attribute conflicts with EXTERNAL" }
+  interface
+    function ext1 (y)
+      real ext1, y
+      external ext1  ! { dg-error "EXTERNAL attribute conflicts with FUNCTION" }
+    end function ext1
+  end interface
+  inval = 1.0
+  print *, ext(inval)
+  print *, ext1(inval)
+  print *, inv(inval)
+contains
+  function inv (y)
+    real inv, y
+    external inv     ! { dg-error "EXTERNAL attribute conflicts with FUNCTION" }
+    inv = y * y * y
+  end function inv
+end program main
+

gcc/testsuite/gfortran.dg/intrinsic_external_1.f90

+! { dg-do compile }
+! PR fortran/20869
+! Note 12.11 "A name shall not appear in both an EXTERNAL and an
+! INTRINSIC statement in the same scoping unit.
+program u
+  intrinsic :: nint
+  external :: nint  ! { dg-error "EXTERNAL attribute conflicts with INTRINSIC attribute" }
+end program u