From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by sourceware.org (Postfix) with ESMTPS id 69207385C331 for ; Tue, 14 Jun 2022 16:13:43 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 69207385C331 Received: by mail-pg1-x535.google.com with SMTP id 31so7277305pgv.11 for ; Tue, 14 Jun 2022 09:13:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :content-language:to:from:subject:content-transfer-encoding; bh=u1xRr+QRE1qrRJBxfyddXIiQfW05F2Gjwp1IUdd8vM4=; b=acmbcIdUsydqfXIuGOE9XrOsxpVVVjoVFjNX13NmCbT2UInaStkkCWci0OZW9vVh5v 6I/7cGGA81nIXME627IESIm4gPV4fgK3lq5ZUNVWKYVuVM9n+CAt6zEnTmw9p8a9OuAD MnNPMWWGTnNdEvdu4UBiLnrdQz29tlDM8V7e8ylaDNzRmGTeC+g2ypRKI6es9dfgP8+o PU9JKmnMo07Vft3p0LQxdwa2CipupIz/qmd+yTPGP2JdVdZZurACDfJTjiXIohckizse WKQk3X9zEjBp40ytmcApJM82msDzGTLpHjp6+URKTzv4kxHn/ycfnhK9kxNSf60f4245 0nLw== X-Gm-Message-State: AOAM532rb9Jqfgfplku2KnXmKTgw6OLqUV6T0+tILYk8BmtITBtXeLis gGOaVblMEeL0XvH7QSO8T/wRPDhxCeQ= X-Google-Smtp-Source: ABdhPJyymjiGIvCil1ZC8BvkhdFqF4ZR/jkd37JN3j+lb8LQuKgCcnskoYjIKGDeFgjsB30cnJUcUw== X-Received: by 2002:a63:4e57:0:b0:3fd:cf48:9ba9 with SMTP id o23-20020a634e57000000b003fdcf489ba9mr5256491pgl.278.1655223221140; Tue, 14 Jun 2022 09:13:41 -0700 (PDT) Received: from ?IPV6:2620:10d:c082:1055:6fd9:fbf1:abf8:6a16? ([2620:10d:c090:500::42c0]) by smtp.googlemail.com with ESMTPSA id b2-20020a170902650200b00168ba5ac8adsm7435985plk.163.2022.06.14.09.13.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jun 2022 09:13:40 -0700 (PDT) Sender: Nathan Sidwell Message-ID: Date: Tue, 14 Jun 2022 09:13:39 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Content-Language: en-US To: GCC Patches From: Nathan Sidwell Subject: c++: Elide calls to NOP module initializers Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3031.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=no 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-List-Received-Date: Tue, 14 Jun 2022 16:13:47 -0000 This implements NOP module initializer elision. Each CMI gains a new flag informing importers whether its initializer actually does something (initializers its own globals, and/or calls initializers of its imports). This allows an importer to determine whether to call it. nathan -- Nathan Sidwell