re PR fortran/33105 (F2003: Support is_iostat_end & is_iostat_eor intrinsics)

	PR fortran/33105

	* intrinsic.c (add_functions): Add IS_IOSTAT_END and
	IS_IOSTAT_EOR intrinsics.
	* gfortran.h (gfc_isym_id): Add GFC_ISYM_IS_IOSTAT_END and
	GFC_ISYM_IS_IOSTAT_EOR.
	* trans-intrinsic.c (gfc_conv_has_intvalue): New function.
	(gfc_conv_intrinsic_function): Call gfc_conv_has_intvalue for
	GFC_ISYM_IS_IOSTAT_END and GFC_ISYM_IS_IOSTAT_EOR.
	* intrinsic.texi: Add IS_IOSTAT_END and IS_IOSTAT_EOR.

	* gfortran.dg/is_iostat_end_eor_1.f90: New test.

From-SVN: r127903

gcc/fortran/ChangeLog

+2007-08-29  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+	    Tobias Burnus  <burnus@gcc.gnu.org>
+
+	PR fortran/33105
+	* intrinsic.c (add_functions): Add IS_IOSTAT_END and
+	IS_IOSTAT_EOR intrinsics.
+	* gfortran.h (gfc_isym_id): Add GFC_ISYM_IS_IOSTAT_END and
+	GFC_ISYM_IS_IOSTAT_EOR.
+	* trans-intrinsic.c (gfc_conv_has_intvalue): New function.
+	(gfc_conv_intrinsic_function): Call gfc_conv_has_intvalue for
+	GFC_ISYM_IS_IOSTAT_END and GFC_ISYM_IS_IOSTAT_EOR.
+	* intrinsic.texi: Add IS_IOSTAT_END and IS_IOSTAT_EOR.
+
 2007-08-28  Christopher D. Rickett  <crickett@lanl.gov>
 
 	PR fortran/33215

gcc/fortran/gfortran.h

@@ -419,6 +419,8 @@ enum gfc_isym_id
   GFC_ISYM_IOR,
   GFC_ISYM_IRAND,
   GFC_ISYM_ISATTY,
+  GFC_ISYM_IS_IOSTAT_END,
+  GFC_ISYM_IS_IOSTAT_EOR,
   GFC_ISYM_ISNAN,
   GFC_ISYM_ISHFT,
   GFC_ISYM_ISHFTC,

gcc/fortran/intrinsic.c

@@ -1633,6 +1633,18 @@ add_functions (void)
 
   make_generic ("isatty", GFC_ISYM_ISATTY, GFC_STD_GNU);
 
+  add_sym_1 ("is_iostat_end", GFC_ISYM_IS_IOSTAT_END,
+	     CLASS_ELEMENTAL, ACTUAL_NO, BT_LOGICAL, dl, GFC_STD_F2003,
+	     gfc_check_i, NULL, NULL, i, BT_INTEGER, 0, REQUIRED);
+
+  make_generic ("is_iostat_end", GFC_ISYM_IS_IOSTAT_END, GFC_STD_F2003);
+
+  add_sym_1 ("is_iostat_eor", GFC_ISYM_IS_IOSTAT_EOR,
+	     CLASS_ELEMENTAL, ACTUAL_NO, BT_LOGICAL, dl, GFC_STD_F2003,
+	     gfc_check_i, NULL, NULL, i, BT_INTEGER, 0, REQUIRED);
+
+  make_generic ("is_iostat_eor", GFC_ISYM_IS_IOSTAT_EOR, GFC_STD_F2003);
+
   add_sym_1 ("isnan", GFC_ISYM_ISNAN, CLASS_ELEMENTAL, ACTUAL_NO, BT_LOGICAL,
 	     dl, GFC_STD_GNU, gfc_check_isnan, NULL, NULL,
 	     x, BT_REAL, 0, REQUIRED);

gcc/fortran/intrinsic.texi

@@ -152,6 +152,8 @@ Some basic guidelines for editing this document:
 * @code{INT8}:          INT8,      Convert to 64-bit integer type
 * @code{IOR}:           IOR,       Bitwise logical or
 * @code{IRAND}:         IRAND,     Integer pseudo-random number
+* @code{IS_IOSTAT_END}:  IS_IOSTAT_END, Test for end-of-file value
+* @code{IS_IOSTAT_EOR}:  IS_IOSTAT_EOR, Test for end-of-record value
 * @code{ISATTY}:        ISATTY,    Whether a unit is a terminal device
 * @code{ISHFT}:         ISHFT,     Shift bits
 * @code{ISHFTC}:        ISHFTC,    Shift bits circularly
@@ -5878,6 +5880,96 @@ end program test_irand
 
 
 
+@node IS_IOSTAT_END
+@section @code{IS_IOSTAT_END} --- Test for end-of-file value
+@fnindex IS_IOSTAT_END
+@cindex IOSTAT, end of file
+
+@table @asis
+@item @emph{Description}:
+@code{IS_IOSTAT_END} tests whether an variable has the value of the I/O
+status ``end of file''. The function is equivalent to comparing the variable
+with the @code{IOSTAT_END} parameter of the intrinsic module
+@code{ISO_FORTRAN_ENV}.
+
+@item @emph{Standard}:
+Fortran 2003.
+
+@item @emph{Class}:
+Elemental function
+
+@item @emph{Syntax}:
+@code{RESULT = IS_IOSTAT_END(I)}
+
+@item @emph{Arguments}:
+@multitable @columnfractions .15 .70
+@item @var{I} @tab Shall be of the type @code{INTEGER}.
+@end multitable
+
+@item @emph{Return value}:
+Returns a @code{LOGICAL} of the default kind, which @code{.TRUE.} if
+@var{I} has the value which indicates an end of file condition for
+IOSTAT= specifiers, and is @code{.FALSE.} otherwise.
+
+@item @emph{Example}:
+@smallexample
+PROGRAM iostat
+  IMPLICIT NONE
+  INTEGER :: stat, i
+  OPEN(88, FILE='test.dat')
+  READ(88, *, IOSTAT=stat) i
+  IF(IS_IOSTAT_END(stat)) STOP 'END OF FILE'
+END PROGRAM
+@end smallexample
+@end table
+
+
+
+@node IS_IOSTAT_EOR
+@section @code{IS_IOSTAT_EOR} --- Test for end-of-record value
+@fnindex IS_IOSTAT_EOR
+@cindex IOSTAT, end of record
+
+@table @asis
+@item @emph{Description}:
+@code{IS_IOSTAT_EOR} tests whether an variable has the value of the I/O
+status ``end of record''. The function is equivalent to comparing the
+variable with the @code{IOSTAT_EOR} parameter of the intrinsic module
+@code{ISO_FORTRAN_ENV}.
+
+@item @emph{Standard}:
+Fortran 2003.
+
+@item @emph{Class}:
+Elemental function
+
+@item @emph{Syntax}:
+@code{RESULT = IS_IOSTAT_EOR(I)}
+
+@item @emph{Arguments}:
+@multitable @columnfractions .15 .70
+@item @var{I} @tab Shall be of the type @code{INTEGER}.
+@end multitable
+
+@item @emph{Return value}:
+Returns a @code{LOGICAL} of the default kind, which @code{.TRUE.} if
+@var{I} has the value which indicates an end of file condition for
+IOSTAT= specifiers, and is @code{.FALSE.} otherwise.
+
+@item @emph{Example}:
+@smallexample
+PROGRAM iostat
+  IMPLICIT NONE
+  INTEGER :: stat, i(50)
+  OPEN(88, FILE='test.dat', FORM='UNFORMATTED')
+  READ(88, IOSTAT=stat) i
+  IF(IS_IOSTAT_EOR(stat)) STOP 'END OF RECORD'
+END PROGRAM
+@end smallexample
+@end table
+
+
+
 @node ISATTY
 @section @code{ISATTY} --- Whether a unit is a terminal device.
 @fnindex ISATTY

gcc/fortran/trans-intrinsic.c

@@ -2759,6 +2759,22 @@ gfc_conv_intrinsic_isnan (gfc_se * se, gfc_expr * expr)
   se->expr = fold_convert (gfc_typenode_for_spec (&expr->ts), se->expr);
 }
 
+
+/* Intrinsics IS_IOSTAT_END and IS_IOSTAT_EOR just need to compare
+   their argument against a constant integer value.  */
+
+static void
+gfc_conv_has_intvalue (gfc_se * se, gfc_expr * expr, const int value)
+{
+  tree arg;
+
+  gfc_conv_intrinsic_function_args (se, expr, &arg, 1);
+  se->expr = fold_build2 (EQ_EXPR, gfc_typenode_for_spec (&expr->ts),
+			  arg, build_int_cst (TREE_TYPE (arg), value));
+}
+
+
+
 /* MERGE (tsource, fsource, mask) = mask ? tsource : fsource.  */
 
 static void
@@ -3911,6 +3927,14 @@ gfc_conv_intrinsic_function (gfc_se * se, gfc_expr * expr)
       gfc_conv_intrinsic_bitop (se, expr, BIT_IOR_EXPR);
       break;
 
+    case GFC_ISYM_IS_IOSTAT_END:
+      gfc_conv_has_intvalue (se, expr, -1);
+      break;
+
+    case GFC_ISYM_IS_IOSTAT_EOR:
+      gfc_conv_has_intvalue (se, expr, -2);
+      break;
+
     case GFC_ISYM_ISNAN:
       gfc_conv_intrinsic_isnan (se, expr);
       break;

gcc/testsuite/ChangeLog

+2007-08-29  Tobias Burnus  <burnus@gcc.gnu.org>
+
+	PR fortran/33105
+	* gfortran.dg/is_iostat_end_eor_1.f90: New test.
+
 2007-08-29  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.dg/h8300-ice2.c: Remove target selector.

gcc/testsuite/gfortran.dg/is_iostat_end_eor_1.f90

+! { dg-do run }
+! Test for the Fortran 2003 intrinsics is_iostat_end & is_iostat_eor
+!
+program test
+  use iso_fortran_env
+  implicit none
+  if ((.not. is_iostat_end(IOSTAT_END)) .or. is_iostat_end(0)) call abort()
+  if ((.not. is_iostat_eor(IOSTAT_EOR)) .or. is_iostat_end(0)) call abort()
+end program test