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X-Received-From: 2607:f8b0:4864:20::543 Subject: [Qemu-devel] [PATCH 3/4] tcg: Reference count labels X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 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: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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) =20 static inline void tcg_gen_br(TCGLabel *l) { + l->refs++; tcg_gen_op1(INDEX_op_br, label_arg(l)); } =20 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 { =20 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, TC= Gv_i32 arg2, TCGLabel *l) if (cond =3D=3D TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond !=3D 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 =3D=3D TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond !=3D TCG_COND_NEVER) { + l->refs++; if (TCG_TARGET_REG_BITS =3D=3D 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) =20 void tcg_op_remove(TCGContext *s, TCGOp *op) { + TCGLabel *label; + + switch (op->opc) { + case INDEX_op_br: + label =3D arg_label(op->args[0]); + label->refs--; + break; + case INDEX_op_brcond_i32: + case INDEX_op_brcond_i64: + label =3D arg_label(op->args[3]); + label->refs--; + break; + case INDEX_op_brcond2_i32: + label =3D 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--; --=20 2.17.2