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From: Filip Kastl <pheeck@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/pheeck/heads/sccp)] corrected handling of abnormal phis Date: Mon, 5 Sep 2022 09:53:18 +0000 (GMT) [thread overview] Message-ID: <20220905095318.571733858D32@sourceware.org> (raw) https://gcc.gnu.org/g:5b14058a7bad4457c73540eb62139dfebfe952b1 commit 5b14058a7bad4457c73540eb62139dfebfe952b1 Author: Filip Kastl <filip.kastl@gmail.com> Date: Mon Sep 5 11:53:10 2022 +0200 corrected handling of abnormal phis Diff: --- gcc/sccp.cc | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/gcc/sccp.cc b/gcc/sccp.cc index 1ac4474c019..bcb3b313782 100644 --- a/gcc/sccp.cc +++ b/gcc/sccp.cc @@ -126,11 +126,10 @@ finalize_sccp (void) { } -/* Return vector of all PHI functions available to this pass that aren't - abnormal. */ +/* Return vector of all PHI functions from all basic blocks. */ static vec<gphi *> -get_all_normal_phis (void) +get_all_phis (void) { vec<gphi *> result = vNULL; @@ -141,9 +140,6 @@ get_all_normal_phis (void) for (pi = gsi_start_phis (bb); !gsi_end_p (pi); gsi_next (&pi)) { gphi *phi = pi.phi (); - tree ssa_name = gimple_phi_result (phi); - if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name)) - continue; result.safe_push (phi); } } @@ -423,7 +419,10 @@ process_scc (vec<gphi *> scc) break; } - replace_scc_by_value (scc, outer_op); + /* Only replace by non-abnormal phi. */ + if (!(TREE_CODE (outer_op) == SSA_NAME && + SSA_NAME_OCCURS_IN_ABNORMAL_PHI (outer_op))) + replace_scc_by_value (scc, outer_op); } else if (outer_ops.elements () > 1) { @@ -476,7 +475,7 @@ unsigned pass_sccp::execute (function *) { init_sccp (); - remove_redundant_phis (get_all_normal_phis ()); + remove_redundant_phis (get_all_phis ()); finalize_sccp (); return 0;
next reply other threads:[~2022-09-05 9:53 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-05 9:53 Filip Kastl [this message] 2023-02-15 10:14 Filip Kastl
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