[gcc r10-10474] Fortran: skip compile-time shape check if constructor shape is not known

[gcc r10-10474] Fortran: skip compile-time shape check if constructor shape is not known

[Harald Anlauf]

https://gcc.gnu.org/g:251061b82852bdebc6f13510b415ecb73a2f80ae

commit r10-10474-g251061b82852bdebc6f13510b415ecb73a2f80ae
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Mon Feb 21 22:49:05 2022 +0100

    Fortran: skip compile-time shape check if constructor shape is not known
    
    gcc/fortran/ChangeLog:
    
            PR fortran/104619
            * resolve.c (resolve_structure_cons): Skip shape check if shape
            of constructor cannot be determined at compile time.
    
    gcc/testsuite/ChangeLog:
    
            PR fortran/104619
            * gfortran.dg/derived_constructor_comps_7.f90: New test.
    
    (cherry picked from commit bc66b471d16ef2fd8cb66fd1131b41f80ecb9961)

Diff:
---
 gcc/fortran/resolve.c                              |  2 ++
 .../gfortran.dg/derived_constructor_comps_7.f90    | 28 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 9104b17988b..dfc22e25e43 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -1454,6 +1454,8 @@ resolve_structure_cons (gfc_expr *expr, int init)
 		  t = false;
 		  break;
 		};
+	      if (cons->expr->shape == NULL)
+		continue;
 	      mpz_set_ui (len, 1);
 	      mpz_add (len, len, comp->as->upper[n]->value.integer);
 	      mpz_sub (len, len, comp->as->lower[n]->value.integer);
diff --git a/gcc/testsuite/gfortran.dg/derived_constructor_comps_7.f90 b/gcc/testsuite/gfortran.dg/derived_constructor_comps_7.f90
new file mode 100644
index 00000000000..238ac3d9f26
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/derived_constructor_comps_7.f90
@@ -0,0 +1,28 @@
+! { dg-do run }
+! PR fortran/104619
+
+module m
+  implicit none
+  type :: item
+     real :: x
+  end type item
+  type :: container
+     type(item) :: items(3)
+  end type container
+end module
+
+program p
+  use m
+  implicit none
+  type(item), allocatable :: items(:)
+  type(container) :: c
+  integer         :: i, n
+  items = [item(3.0), item(4.0), item(5.0)]
+  c = container(items=[(items(i), i = 1, size(items))])
+  if (any (c%items% x /= items% x)) stop 1
+  n = size (items)
+  c = container(items=[(items(i), i = 1, n)])
+  if (any (c%items% x /= items% x)) stop 2
+  c = container(items=[(items(i), i = 1, 3)])
+  if (any (c%items% x /= items% x)) stop 3
+end program