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[86.9.131.95]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45213709611sm120899305e9.24.2025.06.09.12.01.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Jun 2025 12:01:40 -0700 (PDT) Date: Mon, 9 Jun 2025 20:01:38 +0100 From: Stafford Horne To: Simon Marchi Cc: GDB patches , Linux OpenRISC Subject: Re: [PATCH] or1k: Fix ICE in libgcc caused by recent validate_subreg changes Message-ID: References: <20250609185222.1538148-1-shorne@gmail.com> Precedence: bulk X-Mailing-List: linux-openrisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Jun 09, 2025 at 02:57:46PM -0400, Simon Marchi wrote: > On 6/9/25 2:52 PM, Stafford Horne wrote: > > After commit eb2ea476db2 ("emit-rtl: Allow extra checks for > > paradoxical subregs [PR119966]") paradoxical subregs or the OpenRISC > > condition flag register (reg:BI sr_f) are no longer allowed. > > > > This causes and ICE in the ce1 pass which tries to get the or1k flag > > register into an SI register, which is no longer possible. > > > > Adjust or1k_can_change_mode_class to allow changing the or1k flag reg to > > SI mode which in turn allows paradoxical subregs to bre generated again. > > > > gcc/ChangeLog: > > > > PR or1k/120587 > > * config/or1k/or1k.cc (or1k_can_change_mode_class): Allow > > changing flags mode from BI to SI to allow for paradoxical > > subregs. > > Wrong mailing list I think (gcc, not gdb). Yes sorry, I have tab completion and gdb-patches looked like gcc-patches to me. I have resent to the correct list. -Stafford