From 9d2995d2c1cf5708e3297fc7cffb5184d45a65cb Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Wed, 17 May 2023 20:39:18 +0200
Subject: [PATCH] Fortran: set shape of initializers of zero-sized arrays
[PR95374,PR104352]
gcc/fortran/ChangeLog:
PR fortran/95374
PR fortran/104352
* decl.cc (add_init_expr_to_sym): Set shape of initializer also for
zero-sized arrays, so that bounds violations can be detected later.
gcc/testsuite/ChangeLog:
PR fortran/95374
PR fortran/104352
* gfortran.dg/zero_sized_13.f90: New test.
---
gcc/fortran/decl.cc | 3 +--
gcc/testsuite/gfortran.dg/zero_sized_13.f90 | 28 +++++++++++++++++++++
2 files changed, 29 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/gfortran.dg/zero_sized_13.f90
@@ -2239,8 +2239,7 @@ add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
&& gfc_is_constant_expr (init)
&& (init->expr_type == EXPR_CONSTANT
|| init->expr_type == EXPR_STRUCTURE)
- && spec_size (sym->as, &size)
- && mpz_cmp_si (size, 0) > 0)
+ && spec_size (sym->as, &size))
{
array = gfc_get_array_expr (init->ts.type, init->ts.kind,
&init->where);
new file mode 100644
@@ -0,0 +1,28 @@
+! { dg-do compile }
+! { dg-options "-w" }
+!
+! PR fortran/95374
+! PR fortran/104352 - Various ICEs for bounds violation with zero-sized arrays
+!
+! Contributed by G. Steinmetz
+
+program p
+ implicit none
+ integer :: i
+ integer, parameter :: a(0) = 0
+ integer, parameter :: b(0:-5) = 0
+ integer, parameter :: c(*) = [(a(i:i), i=0,0)] ! { dg-error "out of bounds" }
+ integer, parameter :: d(*) = [(b(i:i), i=1,1)] ! { dg-error "out of bounds" }
+ integer, parameter :: e(1) = [(a(i) , i=1,1)] ! { dg-error "out of bounds" }
+ integer, parameter :: f(1) = [(a(i:i), i=1,1)] ! { dg-error "out of bounds" }
+ integer :: g(1) = [(a(i:i), i=0,0)] ! { dg-error "out of bounds" }
+ integer :: h(1) = [(a(i:i), i=1,1)] ! { dg-error "out of bounds" }
+ print *, [(a(i:i), i=0,0)] ! { dg-error "out of bounds" }
+ print *, [(a(i:i), i=1,1)] ! { dg-error "out of bounds" }
+ print *, any (a(1:1) == 1) ! { dg-error "out of bounds" }
+ print *, all (a(0:0) == 1) ! { dg-error "out of bounds" }
+ print *, sum (a(1:1)) ! { dg-error "out of bounds" }
+ print *, iall (a(0:0)) ! { dg-error "out of bounds" }
+ print *, minloc (a(0:0),1) ! { dg-error "out of bounds" }
+ print *, dot_product(a(1:1),a(1:1)) ! { dg-error "out of bounds" }
+end
--
2.35.3