Dear all,
in simplify_bound we did hit an assert when trying to simplify
LBOUND/UBOUND for arrays with allocatable or pointer attribute.
We cannot do that. Terminate simplification in that situation.
Regtested on x86_64-pc-linux-gnu. OK for mainline/affected branches?
Thanks,
Harald
From 82c5d7ab299ad4bce98b53cc9bba223c29b34e66 Mon Sep 17 00:00:00 2001
From: Harald Anlauf
Date: Tue, 23 Nov 2021 21:39:36 +0100
Subject: [PATCH] Fortran: do not attempt simplification of [LU]BOUND for
pointer/allocatable
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.
---
gcc/fortran/simplify.c | 6 ++
.../gfortran.dg/bound_simplification_7.f90 | 18 ++
2 files changed, 24 insertions(+)
create mode 100644 gcc/testsuite/gfortran.dg/bound_simplification_7.f90
diff --git a/gcc/fortran/simplify.c b/gcc/fortran/simplify.c
index 6a6b3fbd037..c9e13b59da9 100644
--- a/gcc/fortran/simplify.c
+++ b/gcc/fortran/simplify.c
@@ -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
diff --git a/gcc/testsuite/gfortran.dg/bound_simplification_7.f90 b/gcc/testsuite/gfortran.dg/bound_simplification_7.f90
new file mode 100644
index 000..3efecdff769
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/bound_simplification_7.f90
@@ -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
--
2.26.2
