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[69.118.112.187]) by smtp.gmail.com with ESMTPSA id az17-20020a05620a171100b006f3e6933bacsm97631qkb.113.2022.11.10.11.56.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Nov 2022 11:56:04 -0800 (PST) To: gcc-patches@gcc.gnu.org Cc: jason@redhat.com, Patrick Palka Subject: [PATCH 1/2] c++: remove function_p parm from tsubst_copy_and_build Date: Thu, 10 Nov 2022 14:56:01 -0500 Message-Id: <20221110195602.2434376-1-ppalka@redhat.com> X-Mailer: git-send-email 2.38.1.420.g319605f8f0 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-13.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP 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: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Patrick Palka via Gcc-patches From: Patrick Palka Reply-To: Patrick Palka Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749140465408115812?= X-GMAIL-MSGID: =?utf-8?q?1749140465408115812?= The function_p parameter of tsubst_copy_and_build (added in r69316) is inspected only in its IDENTIFIER_NODE case, where it controls whether we diagnose unqualified name lookup failure for the given identifier. But I think ever since r173965, we never substitute an IDENTIFIER_NODE with function_p=true for which the lookup can possibly fail, and therefore the flag is effectively unneeded. Before that commit, we would incorrectly repeat unqualified lookup for an ADL-enabled CALL_EXPR at instantiation time, which naturally could fail and thus motivated the flag. Afterwards, we no longer substitute an IDENTIFIER_NODE callee when koenig_p is true so the flag isn't needed for its original purpose. What about when koenig_p=false? Apparently we still may have an IDENTIFIER_NODE callee in this case, namely when unqualified name lookup found a dependent local function declaration, but repeating that lookup can't fail. (It also can't fail for USING_DECL callees.) So this patch removes this effectively unneeded parameter from tsubst_copy_and_build. It also updates a outdated comment in the CALL_EXPR case about when we may see an IDENTIFIER_NODE callee with koenig_p=false. Bootstrapped and regtested on x86_64-pc-linux-gnu, does this look OK for trunk? gcc/cp/ChangeLog: * cp-lang.cc (objcp_tsubst_copy_and_build): Remove function_p parameter. * cp-objcp-common.h (objcp_tsubst_copy_and_build): Likewise. * cp-tree.h (tsubst_copy_and_build): Likewise. * init.cc (get_nsdmi): Adjust calls to tsubst_copy_and_build. * pt.cc (expand_integer_pack): Likewise. (instantiate_non_dependent_expr_internal): Likewise. (tsubst_function_decl): Likewise. (tsubst_arg_types): Likewise. (tsubst_exception_specification): Likewise. (tsubst): Likewise. (tsubst_copy_asm_operands): Likewise. (tsubst_expr): Likewise. (tsubst_non_call_postfix_expression): Likewise. (tsubst_lambda_expr): Likewise. (tsubst_copy_and_build_call_args): Likewise. (tsubst_copy_and_build): Remove function_p parameter and adjust function comment. Adjust recursive calls. : Update outdated comment about when we can see an IDENTIFIER_NODE callee with koenig_p=false. (maybe_instantiate_noexcept): Adjust calls to tsubst_copy_and_build. gcc/objcp/ChangeLog: * objcp-lang.cc (objcp_tsubst_copy_and_build): Remove function_p parameter. --- gcc/cp/cp-lang.cc | 3 +-- gcc/cp/cp-objcp-common.h | 3 +-- gcc/cp/cp-tree.h | 2 +- gcc/cp/init.cc | 2 +- gcc/cp/pt.cc | 46 ++++++++++++---------------------------- gcc/objcp/objcp-lang.cc | 5 ++--- 6 files changed, 19 insertions(+), 42 deletions(-) diff --git a/gcc/cp/cp-lang.cc b/gcc/cp/cp-lang.cc index c3cfde56cc6..a3f29eda0d6 100644 --- a/gcc/cp/cp-lang.cc +++ b/gcc/cp/cp-lang.cc @@ -116,8 +116,7 @@ tree objcp_tsubst_copy_and_build (tree /*t*/, tree /*args*/, tsubst_flags_t /*complain*/, - tree /*in_decl*/, - bool /*function_p*/) + tree /*in_decl*/) { return NULL_TREE; } diff --git a/gcc/cp/cp-objcp-common.h b/gcc/cp/cp-objcp-common.h index 1a67f14d9b3..f4ba0c9e012 100644 --- a/gcc/cp/cp-objcp-common.h +++ b/gcc/cp/cp-objcp-common.h @@ -24,8 +24,7 @@ along with GCC; see the file COPYING3. If not see /* In cp/objcp-common.c, cp/cp-lang.cc and objcp/objcp-lang.cc. */ extern tree cp_get_debug_type (const_tree); -extern tree objcp_tsubst_copy_and_build (tree, tree, tsubst_flags_t, - tree, bool); +extern tree objcp_tsubst_copy_and_build (tree, tree, tsubst_flags_t, tree); extern int cp_decl_dwarf_attribute (const_tree, int); extern int cp_type_dwarf_attribute (const_tree, int); diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h index d13bb3d4c0e..40fd2e1ebb9 100644 --- a/gcc/cp/cp-tree.h +++ b/gcc/cp/cp-tree.h @@ -7383,7 +7383,7 @@ extern tree tsubst_default_argument (tree, int, tree, tree, tsubst_flags_t); extern tree tsubst (tree, tree, tsubst_flags_t, tree); extern tree tsubst_copy_and_build (tree, tree, tsubst_flags_t, - tree, bool = false, bool = false); + tree, bool = false); extern tree tsubst_expr (tree, tree, tsubst_flags_t, tree, bool); extern tree tsubst_pack_expansion (tree, tree, tsubst_flags_t, tree); diff --git a/gcc/cp/init.cc b/gcc/cp/init.cc index 3d5d3904944..fee49090de7 100644 --- a/gcc/cp/init.cc +++ b/gcc/cp/init.cc @@ -622,7 +622,7 @@ get_nsdmi (tree member, bool in_ctor, tsubst_flags_t complain) /* Do deferred instantiation of the NSDMI. */ init = (tsubst_copy_and_build (init, DECL_TI_ARGS (member), - complain, member, /*function_p=*/false, + complain, member, /*integral_constant_expression_p=*/false)); init = digest_nsdmi_init (member, init, complain); diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index c3fc56a13ff..bcc275f8b6e 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -3773,7 +3773,7 @@ expand_integer_pack (tree call, tree args, tsubst_flags_t complain, { tree ohi = CALL_EXPR_ARG (call, 0); tree hi = tsubst_copy_and_build (ohi, args, complain, in_decl, - false/*fn*/, true/*int_cst*/); + true/*int_cst*/); if (instantiation_dependent_expression_p (hi)) { @@ -6361,7 +6361,6 @@ instantiate_non_dependent_expr_internal (tree expr, tsubst_flags_t complain) /*args=*/NULL_TREE, complain, /*in_decl=*/NULL_TREE, - /*function_p=*/false, /*integral_constant_expression_p=*/true); } @@ -14210,7 +14209,6 @@ tsubst_function_decl (tree t, tree args, tsubst_flags_t complain, { tree spec = lookup_explicit_specifier (t); spec = tsubst_copy_and_build (spec, args, complain, in_decl, - /*function_p=*/false, /*i_c_e_p=*/true); spec = build_explicit_specifier (spec, complain); if (spec == error_mark_node) @@ -15276,7 +15274,7 @@ tsubst_arg_types (tree arg_types, || (in_decl && TREE_CODE (in_decl) == FUNCTION_DECL && DECL_LOCAL_DECL_P (in_decl))) default_arg = tsubst_copy_and_build (default_arg, args, complain, in_decl, - false/*fn*/, false/*constexpr*/); + false/*constexpr*/); tree remaining_arg_types = tsubst_arg_types (TREE_CHAIN (arg_types), args, end, complain, in_decl); @@ -15458,7 +15456,7 @@ tsubst_exception_specification (tree fntype, expr = DEFERRED_NOEXCEPT_PATTERN (expr); } new_specs = tsubst_copy_and_build - (expr, args, complain, in_decl, /*function_p=*/false, + (expr, args, complain, in_decl, /*integral_constant_expression_p=*/true); } new_specs = build_noexcept_spec (new_specs, complain); @@ -16383,7 +16381,6 @@ tsubst (tree t, tree args, tsubst_flags_t complain, tree in_decl) type = tsubst_copy_and_build (DECLTYPE_TYPE_EXPR (t), args, complain|tf_decltype, in_decl, - /*function_p*/false, /*integral_constant_expression*/false); --cp_unevaluated_operand; @@ -18049,7 +18046,6 @@ tsubst_copy_asm_operands (tree t, tree args, tsubst_flags_t complain, if (TREE_CODE (t) != TREE_LIST) return tsubst_copy_and_build (t, args, complain, in_decl, - /*function_p=*/false, /*integral_constant_expression_p=*/false); if (t == void_list_node) @@ -19636,7 +19632,6 @@ tsubst_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl, gcc_assert (!STATEMENT_CODE_P (TREE_CODE (t))); RETURN (tsubst_copy_and_build (t, args, complain, in_decl, - /*function_p=*/false, integral_constant_expression_p)); } @@ -19729,7 +19724,6 @@ tsubst_non_call_postfix_expression (tree t, tree args, /*done=*/false, /*address_p=*/false); else t = tsubst_copy_and_build (t, args, complain, in_decl, - /*function_p=*/false, /*integral_constant_expression_p=*/false); return t; @@ -19802,7 +19796,7 @@ tsubst_lambda_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl) init = tsubst_pack_expansion (init, args, complain, in_decl); else init = tsubst_copy_and_build (init, args, complain, in_decl, - /*fn*/false, /*constexpr*/false); + /*constexpr*/false); if (init == error_mark_node) return error_mark_node; @@ -20070,7 +20064,6 @@ tsubst_copy_and_build_call_args (tree t, tree args, tsubst_flags_t complain, if (!PACK_EXPANSION_P (arg)) vec_safe_push (call_args, tsubst_copy_and_build (arg, args, complain, in_decl, - /*function_p=*/false, integral_constant_expression_p)); else { @@ -20097,21 +20090,18 @@ tsubst_copy_and_build_call_args (tree t, tree args, tsubst_flags_t complain, } /* Like tsubst but deals with expressions and performs semantic - analysis. FUNCTION_P is true if T is the "F" in "F (ARGS)" or - "F (ARGS)". */ + analysis. */ tree tsubst_copy_and_build (tree t, tree args, tsubst_flags_t complain, tree in_decl, - bool function_p, bool integral_constant_expression_p) { #define RETURN(EXP) do { retval = (EXP); goto out; } while(0) #define RECUR(NODE) \ tsubst_copy_and_build (NODE, args, complain, in_decl, \ - /*function_p=*/false, \ integral_constant_expression_p) tree retval, op1; @@ -20168,7 +20158,7 @@ tsubst_copy_and_build (tree t, input_location); if (error_msg) error (error_msg); - if (!function_p && identifier_p (decl)) + if (identifier_p (decl)) { if (complain & tf_error) unqualified_name_lookup_error (decl); @@ -20182,7 +20172,6 @@ tsubst_copy_and_build (tree t, tree object; tree templ = tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl, - function_p, integral_constant_expression_p); tree targs = TREE_OPERAND (t, 1); @@ -20565,7 +20554,6 @@ tsubst_copy_and_build (tree t, op1 = tsubst (op1, args, complain, in_decl); else op1 = tsubst_copy_and_build (op1, args, complain, in_decl, - /*function_p=*/false, /*integral_constant_expression_p=*/ false); --cp_unevaluated_operand; @@ -20605,7 +20593,6 @@ tsubst_copy_and_build (tree t, ++cp_unevaluated_operand; ++c_inhibit_evaluation_warnings; op1 = tsubst_copy_and_build (op1, args, complain, in_decl, - /*function_p=*/false, /*integral_constant_expression_p=*/false); --cp_unevaluated_operand; --c_inhibit_evaluation_warnings; @@ -20618,7 +20605,6 @@ tsubst_copy_and_build (tree t, ++c_inhibit_evaluation_warnings; ++cp_noexcept_operand; op1 = tsubst_copy_and_build (op1, args, complain, in_decl, - /*function_p=*/false, /*integral_constant_expression_p=*/false); --cp_unevaluated_operand; --c_inhibit_evaluation_warnings; @@ -20729,7 +20715,6 @@ tsubst_copy_and_build (tree t, { tree op0 = tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain & ~tf_decltype, in_decl, - /*function_p=*/false, integral_constant_expression_p); RETURN (build_x_compound_expr (EXPR_LOCATION (t), op0, @@ -20775,12 +20760,10 @@ tsubst_copy_and_build (tree t, would incorrectly perform unqualified lookup again. Note that we can also have an IDENTIFIER_NODE if the earlier - unqualified lookup found a member function; in that case - koenig_p will be false and we do want to do the lookup - again to find the instantiated member function. - - FIXME but doing that causes c++/15272, so we need to stop - using IDENTIFIER_NODE in that situation. */ + unqualified lookup found a dependent local extern declaration + (as per finish_call_expr); in that case koenig_p will be false + and we do want to do the lookup again to find the substituted + declaration. */ qualified_p = false; if (TREE_CODE (function) == TEMPLATE_ID_EXPR) @@ -20815,7 +20798,6 @@ tsubst_copy_and_build (tree t, subcomplain |= tf_conv; function = tsubst_copy_and_build (function, args, subcomplain, in_decl, - !qualified_p, integral_constant_expression_p); if (BASELINK_P (function)) @@ -20919,7 +20901,7 @@ tsubst_copy_and_build (tree t, the unqualified lookup again if we aren't in SFINAE context. */ tree unq = (tsubst_copy_and_build - (function, args, complain, in_decl, true, + (function, args, complain, in_decl, integral_constant_expression_p)); if (unq == error_mark_node) RETURN (error_mark_node); @@ -21469,7 +21451,7 @@ tsubst_copy_and_build (tree t, { tree object_ptr = tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, - in_decl, /*function_p=*/false, + in_decl, /*integral_constant_expression_p=*/false); RETURN (finish_offsetof (object_ptr, RECUR (TREE_OPERAND (t, 0)), @@ -21571,8 +21553,7 @@ tsubst_copy_and_build (tree t, /* Handle Objective-C++ constructs, if appropriate. */ { tree subst - = objcp_tsubst_copy_and_build (t, args, complain, - in_decl, /*function_p=*/false); + = objcp_tsubst_copy_and_build (t, args, complain, in_decl); if (subst) RETURN (subst); } @@ -26389,7 +26370,6 @@ maybe_instantiate_noexcept (tree fn, tsubst_flags_t complain) noex = tsubst_copy_and_build (DEFERRED_NOEXCEPT_PATTERN (noex), DEFERRED_NOEXCEPT_ARGS (noex), tf_warning_or_error, fn, - /*function_p=*/false, /*i_c_e_p=*/true); /* Build up the noexcept-specification. */ diff --git a/gcc/objcp/objcp-lang.cc b/gcc/objcp/objcp-lang.cc index 2e8809b865d..5f0e22942b8 100644 --- a/gcc/objcp/objcp-lang.cc +++ b/gcc/objcp/objcp-lang.cc @@ -50,12 +50,11 @@ struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER; there should be very few (if any) routines below. */ tree -objcp_tsubst_copy_and_build (tree t, tree args, tsubst_flags_t complain, - tree in_decl, bool function_p ATTRIBUTE_UNUSED) +objcp_tsubst_copy_and_build (tree t, tree args, tsubst_flags_t complain, + tree in_decl) { #define RECURSE(NODE) \ tsubst_copy_and_build (NODE, args, complain, in_decl, \ - /*function_p=*/false, \ /*integral_constant_expression_p=*/false) /* The following two can only occur in Objective-C++. */