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[81.250.175.67]) by smtp.gmail.com with ESMTPSA id o10-20020a056000010a00b002c70ce264bfsm10169724wrx.76.2023.05.23.01.08.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 May 2023 01:08:29 -0700 (PDT) To: gcc-patches@gcc.gnu.org Cc: Yannick Moy Subject: [COMMITTED] ada: Facilitate proof of Interfaces.C.To_Ada Date: Tue, 23 May 2023 10:08:28 +0200 Message-Id: <20230523080828.1873797-1-poulhies@adacore.com> X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 X-Spam-Status: No, score=-13.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE 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: =?utf-8?q?Marc_Poulhi=C3=A8s_via_Gcc-patches?= From: =?utf-8?q?Marc_Poulhi=C3=A8s?= Reply-To: =?utf-8?q?Marc_Poulhi=C3=A8s?= 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?1766672463907434982?= X-GMAIL-MSGID: =?utf-8?q?1766672463907434982?= From: Yannick Moy Nightly runs of GNATprove fail on proof of the assertion following the loop. Add a loop invariant to facilitate that proof. gcc/ada/ * libgnat/i-c.adb (To_Ada): Add loop invariant. Tested on x86_64-pc-linux-gnu, committed on master. --- gcc/ada/libgnat/i-c.adb | 1 + 1 file changed, 1 insertion(+) diff --git a/gcc/ada/libgnat/i-c.adb b/gcc/ada/libgnat/i-c.adb index 9236189fc15..63aa2a2d53b 100644 --- a/gcc/ada/libgnat/i-c.adb +++ b/gcc/ada/libgnat/i-c.adb @@ -605,6 +605,7 @@ is pragma Loop_Invariant (for all J in Item'First .. From when J /= From => Item (J) /= char32_nul); + pragma Loop_Invariant (From <= Item'First + C_Length_Ghost (Item)); pragma Loop_Variant (Increases => From); if From > Item'Last then