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Tue, 26 Mar 2024 17:52:55 +0100 From: Sven Schnelle To: Richard Henderson Cc: Helge Deller , qemu-devel@nongnu.org Subject: Re: target/hppa: be,n nullifying first insn at branch target? In-Reply-To: (Richard Henderson's message of "Mon, 25 Mar 2024 19:20:34 -1000") References: <875xxa14z1.fsf@t14.stackframe.org> Date: Tue, 26 Mar 2024 17:52:54 +0100 Message-ID: <87r0fxyly1.fsf@t14.stackframe.org> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=23.83.223.94; envelope-from=svens@stackframe.org; helo=ivory.cherry.relay.mailchannels.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Richard Henderson writes: > On 3/25/24 09:33, Sven Schnelle wrote: >> diff --git a/target/hppa/translate.c b/target/hppa/translate.c >> index 7546a5f5a2..56c68a7cbe 100644 >> --- a/target/hppa/translate.c >> +++ b/target/hppa/translate.c >> @@ -3847,7 +3849,7 @@ static bool trans_be(DisasContext *ctx, arg_be *a) >> copy_iaoq_entry(ctx, cpu_gr[31], ctx->iaoq_n, ctx->iaoq_n_var); >> tcg_gen_mov_i64(cpu_sr[0], cpu_iasq_b); >> } >> - if (a->n && use_nullify_skip(ctx)) { >> + if (0 && a->n && use_nullify_skip(ctx)) { >> copy_iaoq_entry(ctx, cpu_iaoq_f, -1, tmp); >> tcg_gen_addi_i64(tmp, tmp, 4); >> copy_iaoq_entry(ctx, cpu_iaoq_b, -1, tmp); >> So i think the problem is caused by this optimization. Does this >> ring a >> bell? Debugging this is rather hard, alone the logfile above is 6GB in >> size... > > The problem is a missing > > nullify_set(ctx, 0) > > within this block. > > I have patches queued to reorg the IAQ handling, which I hope will fix > the problem Sven saw with spaces. It would fix this as a consequence > of other unification. But I think it's a bit too big for 9.0. Thanks Richard. Let me know if you want me to test patches.