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c++: cp_tree_equal cleanups

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A couple of small fixes.  I noticed bind_template_template_parms was
not marking the parm a template parm (this broke some module
handling).  Debugging CALL_EXPR comparisons led me to refactor
cp_tree_equal's CALL_EXPR code (and my recent fix to debug printing of
same).  Finally TREE_VECS are best compared by comp_template_args.  I
recall that last piece being a left over from fixes during gcc-10.
I've been using it on the modules branch since then.

	gcc/cp/
	* tree.c (bind_template_template_parm): Mark the parm as a
	template parm.
	(cp_tree_equal): Refactor CALL_EXPR.  Use comp_template_args for
	TREE_VECs.
This commit is contained in:
Nathan Sidwell 2020-11-03 05:11:42 -08:00
parent fbc3f84743
commit 444655b6f0
1 changed files with 26 additions and 22 deletions
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48
gcc/cp/tree.c
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@ -2700,6 +2700,7 @@ bind_template_template_parm (tree t, tree newargs)
t2 = cxx_make_type (BOUND_TEMPLATE_TEMPLATE_PARM);
decl = build_decl (input_location,
TYPE_DECL, DECL_NAME (decl), NULL_TREE);
SET_DECL_TEMPLATE_PARM_P (decl);
/* These nodes have to be created to reflect new TYPE_DECL and template
arguments. */
@ -3671,20 +3672,28 @@ cp_tree_equal (tree t1, tree t2)
case CALL_EXPR:
{
tree arg1, arg2;
if (KOENIG_LOOKUP_P (t1) != KOENIG_LOOKUP_P (t2))
return false;
if (!called_fns_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2)))
return false;
call_expr_arg_iterator iter1, iter2;
if (KOENIG_LOOKUP_P (t1) != KOENIG_LOOKUP_P (t2)
|| !called_fns_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2)))
return false;
for (arg1 = first_call_expr_arg (t1, &iter1),
arg2 = first_call_expr_arg (t2, &iter2);
arg1 && arg2;
arg1 = next_call_expr_arg (&iter1),
arg2 = next_call_expr_arg (&iter2))
if (!cp_tree_equal (arg1, arg2))
return false;
if (arg1 || arg2)
init_call_expr_arg_iterator (t1, &iter1);
init_call_expr_arg_iterator (t2, &iter2);
if (iter1.n != iter2.n)
return false;
while (more_call_expr_args_p (&iter1))
{
tree arg1 = next_call_expr_arg (&iter1);
tree arg2 = next_call_expr_arg (&iter2);
gcc_checking_assert (arg1 && arg2);
if (!cp_tree_equal (arg1, arg2))
return false;
}
return true;
}
@ -3779,16 +3788,11 @@ cp_tree_equal (tree t1, tree t2)
CHECK_CONSTR_ARGS (t2)));
case TREE_VEC:
{
unsigned ix;
if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2))
return false;
for (ix = TREE_VEC_LENGTH (t1); ix--;)
if (!cp_tree_equal (TREE_VEC_ELT (t1, ix),
TREE_VEC_ELT (t2, ix)))
return false;
return true;
}
/* These are template args. Really we should be getting the
caller to do this as it knows it to be true. */
if (!comp_template_args (t1, t2, NULL, NULL, false))
return false;
return true;
case SIZEOF_EXPR:
case ALIGNOF_EXPR: