https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102285
Eric Gallager <egallager at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ebotcazou at gcc dot gnu.org, | |egallager at gcc dot gnu.org, | |rguenth at gcc dot gnu.org, | |vries at gcc dot gnu.org See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=82421 --- Comment #14 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to David Binderman from comment #11) > (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. cc-ing them