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[69.118.112.187]) by smtp.gmail.com with ESMTPSA id g3-20020a05620a40c300b006ee8874f5fasm2989530qko.53.2022.10.18.11.10.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Oct 2022 11:10:53 -0700 (PDT) To: gcc-patches@gcc.gnu.org Subject: [PATCH 1/2] c++ modules: streaming enum with no enumerators [PR102600] Date: Tue, 18 Oct 2022 14:10:49 -0400 Message-Id: <20221018181050.1629201-1-ppalka@redhat.com> X-Mailer: git-send-email 2.38.0.118.g4732897cf0 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-14.1 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 Cc: nathan@acm.org 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?1747049993185676748?= X-GMAIL-MSGID: =?utf-8?q?1747049993185676748?= For an enum declaration, has_definition returns true iff its TYPE_VALUES field is non-empty. But this will wrongly return false for an enum that's defined to have no enumerators as in the below testcase. This patch fixes has_definition for such enums by checking OPAQUE_ENUM_P instead, which should always give us the right answer here. Tested on x86_64-pc-linux-gnu, does this look OK for trunk? PR c++/102600 gcc/cp/ChangeLog: * module.cc (has_definition): For an enum declaration, check OPAQUE_ENUM_P instead of TYPE_VALUES. gcc/testsuite/ChangeLog: * g++.dg/modules/enum-9_a.H: New test. * g++.dg/modules/enum-9_b.C: New test. --- gcc/cp/module.cc | 3 ++- gcc/testsuite/g++.dg/modules/enum-9_a.H | 5 +++++ gcc/testsuite/g++.dg/modules/enum-9_b.C | 8 ++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/modules/enum-9_a.H create mode 100644 gcc/testsuite/g++.dg/modules/enum-9_b.C diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc index 2c2f9a9a8cb..cc704817718 100644 --- a/gcc/cp/module.cc +++ b/gcc/cp/module.cc @@ -11443,7 +11443,8 @@ has_definition (tree decl) if (type == TYPE_MAIN_VARIANT (type) && decl == TYPE_NAME (type) && (TREE_CODE (type) == ENUMERAL_TYPE - ? TYPE_VALUES (type) : TYPE_FIELDS (type))) + ? !OPAQUE_ENUM_P (type) + : TYPE_FIELDS (type) != NULL_TREE)) return true; } break; diff --git a/gcc/testsuite/g++.dg/modules/enum-9_a.H b/gcc/testsuite/g++.dg/modules/enum-9_a.H new file mode 100644 index 00000000000..1aecabfd0bd --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/enum-9_a.H @@ -0,0 +1,5 @@ +// PR c++/102600 +// { dg-additional-options -fmodule-header } +// { dg-module-cmi {} } + +enum class byte : unsigned char { }; diff --git a/gcc/testsuite/g++.dg/modules/enum-9_b.C b/gcc/testsuite/g++.dg/modules/enum-9_b.C new file mode 100644 index 00000000000..aa1fdf21444 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/enum-9_b.C @@ -0,0 +1,8 @@ +// PR c++/102600 +// { dg-additional-options -fmodules-ts } + +import "enum-9_a.H"; + +void push(byte) {} +void write(char v) { push(static_cast(v)); } +int main() { write(char{}); }