From 20da56165273c8814b3c53e6d71549ba6a37e0cd Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Sat, 13 Jan 2024 22:00:21 +0100
Subject: [PATCH] Fortran: intrinsic ISHFTC and missing optional argument SIZE
[PR67277]
gcc/fortran/ChangeLog:
PR fortran/67277
* trans-intrinsic.cc (gfc_conv_intrinsic_ishftc): Handle optional
dummy argument for SIZE passed to ISHFTC. Set default value to
BIT_SIZE(I) when missing.
gcc/testsuite/ChangeLog:
PR fortran/67277
* gfortran.dg/ishftc_optional_size_1.f90: New test.
---
gcc/fortran/trans-intrinsic.cc | 14 +++
.../gfortran.dg/ishftc_optional_size_1.f90 | 97 +++++++++++++++++++
2 files changed, 111 insertions(+)
create mode 100644 gcc/testsuite/gfortran.dg/ishftc_optional_size_1.f90
@@ -6863,9 +6863,23 @@ gfc_conv_intrinsic_ishftc (gfc_se * se, gfc_expr * expr)
if (num_args == 3)
{
+ gfc_expr *size = expr->value.function.actual->next->next->expr;
+
/* Use a library function for the 3 parameter version. */
tree int4type = gfc_get_int_type (4);
+ /* Treat optional SIZE argument when it is passed as an optional
+ dummy. If SIZE is absent, the default value is BIT_SIZE(I). */
+ if (size->expr_type == EXPR_VARIABLE
+ && size->symtree->n.sym->attr.dummy
+ && size->symtree->n.sym->attr.optional)
+ {
+ tree type_of_size = TREE_TYPE (args[2]);
+ args[2] = build3_loc (input_location, COND_EXPR, type_of_size,
+ gfc_conv_expr_present (size->symtree->n.sym),
+ args[2], fold_convert (type_of_size, nbits));
+ }
+
/* We convert the first argument to at least 4 bytes, and
convert back afterwards. This removes the need for library
functions for all argument sizes, and function will be
new file mode 100644
@@ -0,0 +1,97 @@
+! { dg-do run }
+!
+! PR fortran/67277 - ISHFTC and missing optional argument SIZE
+
+module m
+ implicit none
+contains
+ ! Optional argument passed by reference
+ elemental function ishftc4_ref (i, shift, size_) result(r)
+ integer(4), intent(in) :: i
+ integer, intent(in) :: shift
+ integer, intent(in), optional :: size_
+ integer :: r
+ r = ishftc (i, shift=shift, size=size_)
+ end
+
+ elemental function ishftc1_ref (i, shift, size_) result(r)
+ integer(1), intent(in) :: i
+ integer, intent(in) :: shift
+ integer(1), intent(in), optional :: size_
+ integer(1) :: r
+ r = ishftc (i, shift=shift, size=size_)
+ end
+
+ ! Array valued argument i
+ function ishftc4_ref_4 (i, shift, size_) result(r)
+ integer(4), intent(in) :: i(4)
+ integer, intent(in) :: shift
+ integer, intent(in), optional :: size_
+ integer :: r(size(i))
+ r = ishftc (i, shift=shift, size=size_)
+ end
+
+ ! Optional argument passed by value
+ elemental function ishftc4_val (i, shift, size_) result(r)
+ integer(4), intent(in) :: i
+ integer, intent(in) :: shift
+ integer, value, optional :: size_
+ integer :: r
+ r = ishftc (i, shift=shift, size=size_)
+ end
+
+ elemental function ishftc1_val (i, shift, size_) result(r)
+ integer(1), intent(in) :: i
+ integer, intent(in) :: shift
+ integer(1), value, optional :: size_
+ integer(1) :: r
+ r = ishftc (i, shift=shift, size=size_)
+ end
+
+ ! Array valued argument i
+ function ishftc4_val_4 (i, shift, size_) result(r)
+ integer(4), intent(in) :: i(4)
+ integer, intent(in) :: shift
+ integer, value, optional :: size_
+ integer :: r(size(i))
+ r = ishftc (i, shift=shift, size=size_)
+ end
+end module m
+
+program p
+ use m
+ implicit none
+ integer :: shift = 1
+ integer(4) :: i4 = 127, j4(4), k4(4)
+ integer(1) :: i1 = 127
+ integer(4) :: expect4
+ integer(1) :: expect1
+
+ ! Scalar variants
+ expect4 = 2*i4
+ if (ishftc (i4, shift) /= expect4) stop 1
+ if (ishftc4_ref (i4, shift) /= expect4) stop 2
+ if (ishftc4_val (i4, shift) /= expect4) stop 3
+
+ expect1 = -2_1
+ if (ishftc (i1, shift) /= expect1) stop 4
+ if (ishftc1_ref (i1, shift) /= expect1) stop 5
+ if (ishftc1_val (i1, shift) /= expect1) stop 6
+
+ ! Array arguments
+ expect4 = 2*i4
+ j4 = i4
+ k4 = ishftc (j4, shift)
+ if (any (k4 /= expect4)) stop 7
+
+ ! The following works on x86_64 but might currently fail on other systems:
+ ! (see PR113377)
+! k4 = ishftc4_val_4 (j4, shift)
+! if (any (k4 /= expect4)) stop 8
+
+ ! The following currently segfaults (might be a scalarizer issue):
+ ! (see PR113377)
+! k4 = ishftc4_ref_4 (j4, shift)
+! print *, k4
+! if (any (k4 /= expect4)) stop 9
+end program p
--
2.35.3