https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102285
--- Comment #11 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to qinzhao from comment #10)
> 2734 /* The heuristic of fold_builtin_alloca_with_align differs
git blame says:
13e49da934e9 (Tom de Vries 2011-10-07 12:49:49 +0000 2732) /*
The heuristic of fold_builtin_alloca_with_align differs before and
13e49da934e9 (Tom de Vries 2011-10-07 12:49:49 +0000 2733)
after inlining, so we don't require the arg to be changed into a
13e49da934e9 (Tom de Vries 2011-10-07 12:49:49 +0000 2734)
constant for folding, but just to be constant. */
9e878cf1bae7 (Eric Botcazou 2017-10-19 15:58:05 +0000 2735) if
(gimple_call_builtin_p (stmt, BUILT_IN_ALLOCA_WITH_ALIGN)
9e878cf1bae7 (Eric Botcazou 2017-10-19 15:58:05 +0000 2736) ||
gimple_call_builtin_p (stmt, BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX))
1fed1006552c (Tom de Vries 2011-08-31 07:04:25 +0000 2737)
{
13e49da934e9 (Tom de Vries 2011-10-07 12:49:49 +0000 2738)
tree new_rhs = fold_builtin_alloca_with_align (stmt);
5d882cc1dafe (Richard Guenther 2011-09-02 11:53:55 +0000 2739)
if (new_rhs)
5d882cc1dafe (Richard Guenther 2011-09-02 11:53:55 +0000 2740) {
52a5515ed661 (Richard Biener 2021-04-14 13:40:58 +0200 2741)
gimplify_and_update_call_from_tree (gsi, new_rhs);
2f31f742a693 (Tom de Vries 2011-12-17 11:39:43 +0000 2742)
tree var = TREE_OPERAND (TREE_OPERAND (new_rhs, 0),0);
2f31f742a693 (Tom de Vries 2011-12-17 11:39:43 +0000 2743)
insert_clobbers_for_var (*gsi, var);
5d882cc1dafe (Richard Guenther 2011-09-02 11:53:55 +0000 2744)
return true;
5d882cc1dafe (Richard Guenther 2011-09-02 11:53:55 +0000 2745) }
1fed1006552c (Tom de Vries 2011-08-31 07:04:25 +0000 2746)
}
so at least Tom, Eric and Richard have been in there.
