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Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM3PEPF0000A791.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR08MB5708 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, FORGED_SPF_HELO, GIT_PATCH_0, KAM_DMARC_NONE, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE, UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org This exposes an interface for users to create new uses in RTL-SSA. This is needed for updating uses after inserting a new store pair insn in the aarch64 load/store pair fusion pass. gcc/ChangeLog: PR target/113070 * rtl-ssa/accesses.cc (function_info::create_use): New. * rtl-ssa/changes.cc (function_info::finalize_new_accesses): Handle temporary uses, ensure new uses end up referring to permanent defs. * rtl-ssa/functions.h (function_info::create_use): Declare. --- gcc/rtl-ssa/accesses.cc | 10 ++++++++++ gcc/rtl-ssa/changes.cc | 24 +++++++++++++++++++----- gcc/rtl-ssa/functions.h | 5 +++++ 3 files changed, 34 insertions(+), 5 deletions(-) diff --git a/gcc/rtl-ssa/accesses.cc b/gcc/rtl-ssa/accesses.cc index ce4a8b8dc00..3f1304fc5bf 100644 --- a/gcc/rtl-ssa/accesses.cc +++ b/gcc/rtl-ssa/accesses.cc @@ -1466,6 +1466,16 @@ function_info::create_set (obstack_watermark &watermark, return set; } +use_info * +function_info::create_use (obstack_watermark &watermark, + insn_info *insn, + set_info *set) +{ + auto use = change_alloc (watermark, insn, set->resource (), set); + use->m_is_temp = true; + return use; +} + // Return true if ACCESS1 can represent ACCESS2 and if ACCESS2 can // represent ACCESS1. static bool diff --git a/gcc/rtl-ssa/changes.cc b/gcc/rtl-ssa/changes.cc index e538b637848..ce51d6ccd8d 100644 --- a/gcc/rtl-ssa/changes.cc +++ b/gcc/rtl-ssa/changes.cc @@ -538,7 +538,9 @@ function_info::finalize_new_accesses (insn_change &change, insn_info *pos) unsigned int i = 0; for (use_info *use : change.new_uses) { - if (!use->m_has_been_superceded) + if (use->m_is_temp) + use->m_has_been_superceded = true; + else if (!use->m_has_been_superceded) { use = allocate_temp (insn, use->resource (), use->def ()); use->m_has_been_superceded = true; @@ -609,15 +611,27 @@ function_info::finalize_new_accesses (insn_change &change, insn_info *pos) m_temp_uses[i] = use = allocate (*use); use->m_is_temp = false; set_info *def = use->def (); - // Handle cases in which the value was previously not used - // within the block. - if (def && def->m_is_temp) + if (!def || !def->m_is_temp) + continue; + + if (auto phi = dyn_cast (def)) { - phi_info *phi = as_a (def); + // Handle cases in which the value was previously not used + // within the block. gcc_assert (phi->is_degenerate ()); phi = create_degenerate_phi (phi->ebb (), phi->input_value (0)); use->set_def (phi); } + else + { + // The temporary def may also be a set added with this change, in + // which case the permanent set is stored in the last_def link, + // and we need to update the use to refer to the permanent set. + gcc_assert (is_a (def)); + auto perm_set = as_a (def->last_def ()); + gcc_assert (!perm_set->is_temporary ()); + use->set_def (perm_set); + } } } diff --git a/gcc/rtl-ssa/functions.h b/gcc/rtl-ssa/functions.h index 58d0b50ea83..962180e27d6 100644 --- a/gcc/rtl-ssa/functions.h +++ b/gcc/rtl-ssa/functions.h @@ -73,6 +73,11 @@ public: insn_info *insn, resource_info resource); + // Create a temporary use. + use_info *create_use (obstack_watermark &watermark, + insn_info *insn, + set_info *set); + // Create a temporary insn with code INSN_CODE and pattern PAT. insn_info *create_insn (obstack_watermark &watermark, rtx_code insn_code,