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Fortran: do not attempt simplification of [LU]BOUND for pointer/allocatable

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gcc/fortran/ChangeLog:

	PR fortran/103392
	* simplify.c (simplify_bound): Do not try to simplify
	LBOUND/UBOUND for arrays with POINTER or ALLOCATABLE attribute.

gcc/testsuite/ChangeLog:

	PR fortran/103392
	* gfortran.dg/bound_simplification_7.f90: New test.
This commit is contained in:
Harald Anlauf 2021-11-23 21:39:36 +01:00
parent 4b1d3d8d73
commit 16e95050f7
2 changed files with 24 additions and 0 deletions
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6
gcc/fortran/simplify.c
View File

@ -4266,6 +4266,12 @@ simplify_bound (gfc_expr *array, gfc_expr *dim, gfc_expr *kind, int upper)
|| (as->type == AS_ASSUMED_SHAPE && upper)))
return NULL;
/* 'array' shall not be an unallocated allocatable variable or a pointer that
is not associated. */
if (array->expr_type == EXPR_VARIABLE
&& (gfc_expr_attr (array).allocatable || gfc_expr_attr (array).pointer))
return NULL;
gcc_assert (!as
|| (as->type != AS_DEFERRED
&& array->expr_type == EXPR_VARIABLE

18
gcc/testsuite/gfortran.dg/bound_simplification_7.f90 Normal file
View File

@ -0,0 +1,18 @@
! { dg-do compile }
! PR fortran/103392 - ICE in simplify_bound
program p
integer, allocatable :: a(1:1) ! { dg-error "deferred shape or assumed rank" }
integer :: b(1) = lbound(a) ! { dg-error "does not reduce" }
integer :: c(1) = ubound(a) ! { dg-error "does not reduce" }
end
subroutine s(x, y)
type t
integer :: i(3)
end type t
type(t), pointer :: x(:)
type(t), allocatable :: y(:)
integer, parameter :: m(1) = ubound (x(1)% i)
integer :: n(1) = ubound (y(1)% i)
end subroutine s