re PR libfortran/32731 (pack/unpack with kind=1 or kind=2 mask)

2007-07-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR libfortran/32731
	* iresolve.c(gfc_resolve_pack):  A scalar mask has
	to be kind=4, an array mask with kind<4 is converted
	to gfc_default_logical_kind automatically.
	(gfc_resolve_unpack):  Convert mask to gfc_default_lotical_kind
	if it has a kind<4.

2007-07-14  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR libfortran/32731
	* gfortran.dg/pack_mask_1.f90:  New test.
	* gfortran.dg/unpack_mask_1.f90:  New test.

From-SVN: r126644

1 files changed, 39 insertions, 15 deletions

diff --git a/gcc/fortran/iresolve.c b/gcc/fortran/iresolve.c
index b0a1c37..66a3c2f 100644
--- a/gcc/fortran/iresolve.c
+++ b/gcc/fortran/iresolve.c
@@ -1556,29 +1556,42 @@ void
 gfc_resolve_pack (gfc_expr *f, gfc_expr *array, gfc_expr *mask,
 		  gfc_expr *vector ATTRIBUTE_UNUSED)
 {
+  int newkind;
+
   f->ts = array->ts;
   f->rank = 1;
 
-  if (mask->rank != 0)
-    f->value.function.name = (array->ts.type == BT_CHARACTER
-			   ? PREFIX ("pack_char") : PREFIX ("pack"));
+  /* The mask can be kind 4 or 8 for the array case.  For the scalar
+     case, coerce it to kind=4 unconditionally (because this is the only
+     kind we have a library function for).  */
+
+  newkind = 0;
+  if (mask->rank == 0)
+    {
+      if (mask->ts.kind != 4)
+	newkind = 4;
+    }
   else
     {
-      /* We convert mask to default logical only in the scalar case.
-	 In the array case we can simply read the array as if it were
-	 of type default logical.  */
-      if (mask->ts.kind != gfc_default_logical_kind)
-	{
-	  gfc_typespec ts;
+      if (mask->ts.kind < 4)
+	newkind = gfc_default_logical_kind;
+    }
 
-	  ts.type = BT_LOGICAL;
-	  ts.kind = gfc_default_logical_kind;
-	  gfc_convert_type (mask, &ts, 2);
-	}
+  if (newkind)
+    {
+      gfc_typespec ts;
 
-      f->value.function.name = (array->ts.type == BT_CHARACTER
-			     ? PREFIX ("pack_s_char") : PREFIX ("pack_s"));
+      ts.type = BT_LOGICAL;
+      ts.kind = gfc_default_logical_kind;
+      gfc_convert_type (mask, &ts, 2);
     }
+
+  if (mask->rank != 0)
+    f->value.function.name = (array->ts.type == BT_CHARACTER
+			      ? PREFIX ("pack_char") : PREFIX ("pack"));
+  else
+    f->value.function.name = (array->ts.type == BT_CHARACTER
+			      ? PREFIX ("pack_s_char") : PREFIX ("pack_s"));
 }
 
 
@@ -2339,6 +2352,17 @@ gfc_resolve_unpack (gfc_expr *f, gfc_expr *vector, gfc_expr *mask,
   f->ts = vector->ts;
   f->rank = mask->rank;
 
+  /* Coerce the mask to default logical kind if it has kind < 4.  */
+
+  if (mask->ts.kind < 4)
+    {
+      gfc_typespec ts;
+
+      ts.type = BT_LOGICAL;
+      ts.kind = gfc_default_logical_kind;
+      gfc_convert_type (mask, &ts, 2);
+    }
+
   f->value.function.name
     = gfc_get_string (PREFIX ("unpack%d%s"), field->rank > 0 ? 1 : 0,
 		      vector->ts.type == BT_CHARACTER ? "_char" : "");