commit ee954d940c41614c75be11b9d1de9079c37044d7
Author: Tobias Burnus <tobias@codesourcery.com>
Date: Thu May 12 10:39:58 2022 +0200
Fortran: Fix proc pointer as elemental arg handling
The vtab's _callback function calls the elemental 'cb'
cb (var(:)%comp, comp_types_vtable._callback);
which gets called in a scalarization loop as 'var' might be a
nonscalar. Without the patch, that got translated as:
D.1234 = &comp_types_vtable._callback
...
cb (&(*D.4060)[S.3 + D.4071], &D.1234);
where 'D.1234' is function_type. With the patch, it remains a pointer;
i.e. D.1234 = comp... and 'cb (..., D.1234)', avoiding ME ICE.
Note: Fortran (F2018, C15100) requires that dummy arguments are
dummy data objects, which rules out dummy procs/proc-pointer dummies,
which is enforced in resolve_fl_procedure.
Thus, this change only affects the internally generated code.
gcc/fortran/ChangeLog:
* trans-array.c (gfc_scalar_elemental_arg_saved_as_reference):
Return true for attr.proc_pointer expressions.
gcc/testsuite/ChangeLog:
* gfortran.dg/finalize_38.f90: Compile with -Ofast.
---
gcc/fortran/trans-array.c | 6 ++++++
gcc/testsuite/gfortran.dg/finalize_38.f90 | 1 +
2 files changed, 7 insertions(+)
@@ -3025,6 +3025,12 @@ gfc_scalar_elemental_arg_saved_as_reference (gfc_ss_info * ss_info)
&& gfc_expr_is_variable (ss_info->expr))
return true;
+ /* Proc pointers: avoid creating a non-pointer function temporary;
+ should only get used internally due to constraints. */
+ if (!ss_info->data.scalar.needs_temporary &&
+ gfc_expr_attr (ss_info->expr).proc_pointer)
+ return true;
+
/* Otherwise the expression is evaluated to a temporary variable before the
scalarization loop. */
return false;
@@ -1,4 +1,5 @@
! { dg-do compile }
+! { dg-additional-options "-Ofast" }
!
! Check finalization
!