From eea82246290010addf7f6be71a71b51079b3cb5d Mon Sep 17 00:00:00 2001 From: Martin Jambor Date: Tue, 27 Apr 2021 13:46:10 +0200 Subject: [PATCH] ipa-sra: Release dead LHS SSA_NAME when removing it (PR 99951) When IPA-SRA removes an SSA_NAME from a LHS of a call statement because it is not necessary, it does not release it. This patch fixes that. gcc/ChangeLog: 2021-04-08 Martin Jambor PR ipa/99951 * ipa-param-manipulation.c (ipa_param_adjustments::modify_call): If removing a call statement LHS SSA name, release it. --- gcc/ipa-param-manipulation.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gcc/ipa-param-manipulation.c b/gcc/ipa-param-manipulation.c index 132bb24f76aa..1d1e64f546a7 100644 --- a/gcc/ipa-param-manipulation.c +++ b/gcc/ipa-param-manipulation.c @@ -856,6 +856,7 @@ ipa_param_adjustments::modify_call (gcall *stmt, gcall *new_stmt = gimple_build_call_vec (callee_decl, vargs); + tree ssa_to_remove = NULL; if (tree lhs = gimple_call_lhs (stmt)) { if (!m_skip_return) @@ -880,6 +881,7 @@ ipa_param_adjustments::modify_call (gcall *stmt, } update_stmt (using_stmt); } + ssa_to_remove = lhs; } } @@ -898,6 +900,8 @@ ipa_param_adjustments::modify_call (gcall *stmt, fprintf (dump_file, "\n"); } gsi_replace (&gsi, new_stmt, true); + if (ssa_to_remove) + release_ssa_name (ssa_to_remove); if (update_references) do { -- 2.47.2