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[97.126.123.70]) by smtp.gmail.com with ESMTPSA id c83sm6772831pfb.44.2020.03.20.19.42.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2020 19:42:34 -0700 (PDT) To: gcc-patches@gcc.gnu.org Subject: [PATCH v2 1/9] aarch64: Accept 0 as first argument to compares Date: Fri, 20 Mar 2020 19:42:23 -0700 Message-Id: <20200321024231.13778-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200321024231.13778-1-richard.henderson@linaro.org> References: <20200321024231.13778-1-richard.henderson@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-27.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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: Richard Henderson via Gcc-patches From: "Li, Pan2 via Gcc-patches" Reply-To: Richard Henderson Cc: richard.earnshaw@arm.com, Wilco.Dijkstra@arm.com, marcus.shawcroft@arm.com Errors-To: gcc-patches-bounces@gcc.gnu.org Sender: "Gcc-patches" While cmp (extended register) and cmp (immediate) uses , cmp (shifted register) uses . So we can perform cmp xzr, x0. For ccmp, we only have as an input. * config/aarch64/aarch64.md (cmp): For operand 0, use aarch64_reg_or_zero. Shuffle reg/reg to last alternative and accept Z. (@ccmpcc): For operand 0, use aarch64_reg_or_zero and Z. (@ccmpcc_rev): Likewise. --- gcc/config/aarch64/aarch64.md | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index c7c4d1dd519..b9ae51e48dd 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -502,7 +502,7 @@ [(match_operand 0 "cc_register" "") (const_int 0)]) (compare:CC_ONLY - (match_operand:GPI 2 "register_operand" "r,r,r") + (match_operand:GPI 2 "aarch64_reg_or_zero" "rZ,rZ,rZ") (match_operand:GPI 3 "aarch64_ccmp_operand" "r,Uss,Usn")) (unspec:CC_ONLY [(match_operand 5 "immediate_operand")] @@ -542,7 +542,7 @@ [(match_operand 5 "immediate_operand")] UNSPEC_NZCV) (compare:CC_ONLY - (match_operand:GPI 2 "register_operand" "r,r,r") + (match_operand:GPI 2 "aarch64_reg_or_zero" "rZ,rZ,rZ") (match_operand:GPI 3 "aarch64_ccmp_operand" "r,Uss,Usn"))))] "" "@ @@ -3961,14 +3961,14 @@ (define_insn "cmp" [(set (reg:CC CC_REGNUM) - (compare:CC (match_operand:GPI 0 "register_operand" "rk,rk,rk") - (match_operand:GPI 1 "aarch64_plus_operand" "r,I,J")))] + (compare:CC (match_operand:GPI 0 "aarch64_reg_or_zero" "rk,rk,rkZ") + (match_operand:GPI 1 "aarch64_plus_operand" "I,J,rZ")))] "" "@ - cmp\\t%0, %1 cmp\\t%0, %1 - cmn\\t%0, #%n1" - [(set_attr "type" "alus_sreg,alus_imm,alus_imm")] + cmn\\t%0, #%n1 + cmp\\t%0, %1" + [(set_attr "type" "alus_imm,alus_imm,alus_sreg")] ) (define_insn "fcmp"