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Wed, 7 Feb 2024 19:58:39 GMT Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8376058054; Wed, 7 Feb 2024 19:58:39 +0000 (GMT) Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D83615803F; Wed, 7 Feb 2024 19:58:38 +0000 (GMT) Received: from cowardly-lion.the-meissners.org (unknown [9.61.187.161]) by smtpav06.wdc07v.mail.ibm.com (Postfix) with ESMTPS; Wed, 7 Feb 2024 19:58:38 +0000 (GMT) Date: Wed, 7 Feb 2024 14:58:37 -0500 From: Michael Meissner To: "Kewen.Lin" Cc: Michael Meissner , gcc-patches@gcc.gnu.org, Segher Boessenkool , David Edelsohn , Peter Bergner Subject: Re: Repost [PATCH 1/6] Add -mcpu=future Message-ID: Mail-Followup-To: Michael Meissner , "Kewen.Lin" , gcc-patches@gcc.gnu.org, Segher Boessenkool , David Edelsohn , Peter Bergner References: <4a7b481d-8967-7f90-ad30-7df955552db8@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4a7b481d-8967-7f90-ad30-7df955552db8@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: CTS2NZP91mKmTlVBgtc5rboIX7ID9JDA X-Proofpoint-GUID: Mxdzq6BPYI7rFPePdJeSzW7mNi8_C2Oo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-07_09,2024-02-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 mlxlogscore=727 spamscore=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 phishscore=0 impostorscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402070148 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,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 List-Id: On Wed, Feb 07, 2024 at 05:21:10PM +0800, Kewen.Lin wrote: > on 2024/2/6 14:01, Michael Meissner wrote: > Sorry for the possible confusion here, the "tune_proc" that I referred to is > the variable in the above else branch: > > enum processor_type tune_proc = (TARGET_POWERPC64 ? PROCESSOR_DEFAULT64 : PROCESSOR_DEFAULT); > > It's either PROCESSOR_DEFAULT64 or PROCESSOR_DEFAULT, so it doesn't have a > chance to be PROCESSOR_FUTURE, so the checking "tune_proc == PROCESSOR_FUTURE" > is useless. PROCESSOR_DEFAULT can be PROCESSOR_FUTURE if somebody configures GCC with --with-cpu=future. While in general it shouldn't occur, it is helpful to consider all of the corner cases. -- Michael Meissner, IBM PO Box 98, Ayer, Massachusetts, USA, 01432 email: meissner@linux.ibm.com