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[46.223.203.173]) by smtp.gmail.com with ESMTPSA id r3-20020adff103000000b0032d9337e7d1sm12167846wro.11.2023.10.25.06.47.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Oct 2023 06:47:48 -0700 (PDT) Message-ID: <20af64b0-2c3b-426e-adc0-10baac70e7f7@gmail.com> Date: Wed, 25 Oct 2023 15:47:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: rdapp.gcc@gmail.com, gnu-toolchain@rivosinc.com Subject: Re: [RFC] RISC-V: elide sign extend when expanding cmp_and_jump Content-Language: en-US To: Jeff Law , Vineet Gupta , gcc-patches@gcc.gnu.org References: <20231025050155.627837-1-vineetg@rivosinc.com> <7fe582bc-d259-4d2a-bedf-4e1a334d7fc3@gmail.com> <33283a26-0271-41c3-8934-159658eab352@gmail.com> From: Robin Dapp In-Reply-To: <33283a26-0271-41c3-8934-159658eab352@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,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 List-Id: > Well, it doesn't seem like there's a lot of difference between doing > it in the generic expander bits vs target expander bits -- the former > just calls into the latter for the most part. Thus if the > subreg-promoted state is available in the target expander, I'd expect > it to be available in the generic expander. Ah, sorry I meant in the [sign|zero]extend expanders rather than the compare expanders in order to catch promoted subregs from other origins as well. Maybe that doesn't work, though? Regards Robin