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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1033; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1033.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1633638505329100001 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- tcg/optimize.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index dd78982330..d2e5727662 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -875,6 +875,20 @@ static bool fold_call(OptContext *ctx, TCGOp *op) return true; } =20 +static bool fold_count_zeros(OptContext *ctx, TCGOp *op) +{ + if (arg_is_const(op->args[1])) { + uint64_t t =3D arg_info(op->args[1])->val; + + if (t !=3D 0) { + t =3D do_constant_folding(op->opc, t, 0); + return tcg_opt_gen_movi(ctx, op, op->args[0], t); + } + return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[2]); + } + return false; +} + static bool fold_ctpop(OptContext *ctx, TCGOp *op) { return fold_const1(ctx, op); @@ -1726,20 +1740,6 @@ void tcg_optimize(TCGContext *s) } break; =20 - CASE_OP_32_64(clz): - CASE_OP_32_64(ctz): - if (arg_is_const(op->args[1])) { - TCGArg v =3D arg_info(op->args[1])->val; - if (v !=3D 0) { - tmp =3D do_constant_folding(opc, v, 0); - tcg_opt_gen_movi(&ctx, op, op->args[0], tmp); - } else { - tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[2]); - } - continue; - } - break; - default: break; =20 @@ -1764,6 +1764,10 @@ void tcg_optimize(TCGContext *s) case INDEX_op_brcond2_i32: done =3D fold_brcond2(&ctx, op); break; + CASE_OP_32_64(clz): + CASE_OP_32_64(ctz): + done =3D fold_count_zeros(&ctx, op); + break; CASE_OP_32_64(ctpop): done =3D fold_ctpop(&ctx, op); break; --=20 2.25.1