From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43089) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRPwH-0002oC-G5 for qemu-devel@nongnu.org; Mon, 26 Nov 2018 18:05:14 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gRPw7-0000I4-IT for qemu-devel@nongnu.org; Mon, 26 Nov 2018 18:05:07 -0500 Received: from mail-pg1-x543.google.com ([2607:f8b0:4864:20::543]:39498) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gRPw3-0000H2-Pc for qemu-devel@nongnu.org; Mon, 26 Nov 2018 18:04:59 -0500 Received: by mail-pg1-x543.google.com with SMTP id w6so6877520pgl.6 for ; Mon, 26 Nov 2018 15:04:58 -0800 (PST) Received: from cloudburst.twiddle.net (97-113-170-180.tukw.qwest.net. [97.113.170.180]) by smtp.gmail.com with ESMTPSA id o13sm1798703pfk.57.2018.11.26.15.04.56 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 26 Nov 2018 15:04:56 -0800 (PST) From: Richard Henderson Date: Mon, 26 Nov 2018 15:04:49 -0800 Message-Id: <20181126230450.672-4-richard.henderson@linaro.org> In-Reply-To: <20181126230450.672-1-richard.henderson@linaro.org> References: <20181126230450.672-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH 3/4] tcg: Reference count labels List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Increment when adding branches, and decrement when removing them. Signed-off-by: Richard Henderson --- tcg/tcg-op.h | 1 + tcg/tcg.h | 3 ++- tcg/tcg-op.c | 2 ++ tcg/tcg.c | 20 ++++++++++++++++++++ 4 files changed, 25 insertions(+), 1 deletion(-) diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index db4e9188f4..7007ec0d4d 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -260,6 +260,7 @@ static inline void gen_set_label(TCGLabel *l) static inline void tcg_gen_br(TCGLabel *l) { + l->refs++; tcg_gen_op1(INDEX_op_br, label_arg(l)); } diff --git a/tcg/tcg.h b/tcg/tcg.h index 6b6bc75c82..c6caeeb42b 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -246,7 +246,8 @@ typedef struct TCGRelocation { typedef struct TCGLabel { unsigned has_value : 1; - unsigned id : 31; + unsigned id : 15; + unsigned refs : 16; union { uintptr_t value; tcg_insn_unit *value_ptr; diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 1ad095cc35..bab889662d 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -240,6 +240,7 @@ void tcg_gen_brcond_i32(TCGCond cond, TCGv_i32 arg1, TCGv_i32 arg2, TCGLabel *l) if (cond == TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond != TCG_COND_NEVER) { + l->refs++; tcg_gen_op4ii_i32(INDEX_op_brcond_i32, arg1, arg2, cond, label_arg(l)); } } @@ -1405,6 +1406,7 @@ void tcg_gen_brcond_i64(TCGCond cond, TCGv_i64 arg1, TCGv_i64 arg2, TCGLabel *l) if (cond == TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond != TCG_COND_NEVER) { + l->refs++; if (TCG_TARGET_REG_BITS == 32) { tcg_gen_op6ii_i32(INDEX_op_brcond2_i32, TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2), diff --git a/tcg/tcg.c b/tcg/tcg.c index 17c193791f..31b9b58240 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -2191,6 +2191,26 @@ static void process_op_defs(TCGContext *s) void tcg_op_remove(TCGContext *s, TCGOp *op) { + TCGLabel *label; + + switch (op->opc) { + case INDEX_op_br: + label = arg_label(op->args[0]); + label->refs--; + break; + case INDEX_op_brcond_i32: + case INDEX_op_brcond_i64: + label = arg_label(op->args[3]); + label->refs--; + break; + case INDEX_op_brcond2_i32: + label = arg_label(op->args[5]); + label->refs--; + break; + default: + break; + } + QTAILQ_REMOVE(&s->ops, op, link); QTAILQ_INSERT_TAIL(&s->free_ops, op, link); s->nb_ops--; -- 2.17.2