PR fortran/95587 - ICE in gfc_target_encode_expr, at fortran/target-memory.c:362

EQUIVALENCE objects are subject to constraints listed in the Fortran 2018
standard, section 8.10.1.1.  These constraints are to be checked
also for CLASS variables.

gcc/fortran/
	PR fortran/95587
	* match.c (gfc_match_equivalence): Check constraints on
	EQUIVALENCE objects also for CLASS variables.

diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 82d2b50..8063fca 100644 (file)
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -5700,6 +5700,11 @@ gfc_match_equivalence (void)
 
          if (!gfc_add_in_equivalence (&sym->attr, sym->name, NULL))
            goto cleanup;
+         if (sym->ts.type == BT_CLASS
+             && CLASS_DATA (sym)
+             && !gfc_add_in_equivalence (&CLASS_DATA (sym)->attr,
+                                         sym->name, NULL))
+           goto cleanup;
 
          if (sym->attr.in_common)
            {

diff --git a/gcc/testsuite/gfortran.dg/pr95587.f90 b/gcc/testsuite/gfortran.dg/pr95587.f90
new file mode 100644 (file)
index 0000000..a543fb9
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr95587.f90
@@ -0,0 +1,13 @@
+! { dg-do compile }
+! PR fortran/95587 - ICE in gfc_target_encode_expr, at fortran/target-memory.c:362
+
+program p
+  type t
+  end type t
+  class(*), allocatable :: x, y
+  class(t), allocatable :: u, v
+  class(t),    pointer  :: c, d
+  equivalence (x, y) ! { dg-error "conflicts with ALLOCATABLE" }
+  equivalence (u, v) ! { dg-error "conflicts with ALLOCATABLE" }
+  equivalence (c, d) ! { dg-error "conflicts with POINTER" }
+end