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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 01/46] tcg/optimize: Split out finish_bb, finish_ebb
Date: Tue, 10 Dec 2024 09:23:16 -0600
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Call them directly from the opcode switch statement in tcg_optimize,
rather than in finish_folding based on opcode flags. Adjust folding
of conditional branches to match.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 47 +++++++++++++++++++++++++++++++----------------
1 file changed, 31 insertions(+), 16 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index e9ef16b3c6..20c918e83b 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -964,24 +964,25 @@ static void copy_propagate(OptContext *ctx, TCGOp *op,
}
}
=20
+static void finish_bb(OptContext *ctx)
+{
+ /* We only optimize memory barriers across basic blocks. */
+ ctx->prev_mb =3D NULL;
+}
+
+static void finish_ebb(OptContext *ctx)
+{
+ /* We only optimize across extended basic blocks. */
+ memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
+ remove_mem_copy_all(ctx);
+ finish_bb(ctx);
+}
+
static void finish_folding(OptContext *ctx, TCGOp *op)
{
const TCGOpDef *def =3D &tcg_op_defs[op->opc];
int i, nb_oargs;
=20
- /*
- * We only optimize extended basic blocks. If the opcode ends a BB
- * and is not a conditional branch, reset all temp data.
- */
- if (def->flags & TCG_OPF_BB_END) {
- ctx->prev_mb =3D NULL;
- if (!(def->flags & TCG_OPF_COND_BRANCH)) {
- memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
- remove_mem_copy_all(ctx);
- }
- return;
- }
-
nb_oargs =3D def->nb_oargs;
for (i =3D 0; i < nb_oargs; i++) {
TCGTemp *ts =3D arg_temp(op->args[i]);
@@ -1351,8 +1352,11 @@ static bool fold_brcond(OptContext *ctx, TCGOp *op)
if (i > 0) {
op->opc =3D INDEX_op_br;
op->args[0] =3D op->args[3];
+ finish_ebb(ctx);
+ } else {
+ finish_bb(ctx);
}
- return false;
+ return true;
}
=20
static bool fold_brcond2(OptContext *ctx, TCGOp *op)
@@ -1443,9 +1447,12 @@ static bool fold_brcond2(OptContext *ctx, TCGOp *op)
}
op->opc =3D INDEX_op_br;
op->args[0] =3D label;
- break;
+ finish_ebb(ctx);
+ return true;
}
- return false;
+
+ finish_bb(ctx);
+ return true;
}
=20
static bool fold_bswap(OptContext *ctx, TCGOp *op)
@@ -3037,6 +3044,14 @@ void tcg_optimize(TCGContext *s)
CASE_OP_32_64_VEC(xor):
done =3D fold_xor(&ctx, op);
break;
+ case INDEX_op_set_label:
+ case INDEX_op_br:
+ case INDEX_op_exit_tb:
+ case INDEX_op_goto_tb:
+ case INDEX_op_goto_ptr:
+ finish_ebb(&ctx);
+ done =3D true;
+ break;
default:
break;
}
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 02/46] tcg/optimize: Copy mask writeback to fold_masks
Date: Tue, 10 Dec 2024 09:23:17 -0600
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Use of fold_masks should be restricted to those opcodes that
can reliably make use of it -- those with a single output,
and from higher-level folders that set up the masks.
Prepare for conversion of each folder in turn.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 20c918e83b..1a9e3258e3 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1050,6 +1050,11 @@ static bool fold_masks(OptContext *ctx, TCGOp *op)
uint64_t a_mask =3D ctx->a_mask;
uint64_t z_mask =3D ctx->z_mask;
uint64_t s_mask =3D ctx->s_mask;
+ const TCGOpDef *def =3D &tcg_op_defs[op->opc];
+ TCGTemp *ts;
+
+ /* Only single-output opcodes are supported here. */
+ tcg_debug_assert(def->nb_oargs =3D=3D 1);
=20
/*
* 32-bit ops generate 32-bit results, which for the purpose of
@@ -1062,8 +1067,6 @@ static bool fold_masks(OptContext *ctx, TCGOp *op)
a_mask =3D (int32_t)a_mask;
z_mask =3D (int32_t)z_mask;
s_mask |=3D MAKE_64BIT_MASK(32, 32);
- ctx->z_mask =3D z_mask;
- ctx->s_mask =3D s_mask;
}
=20
if (z_mask =3D=3D 0) {
@@ -1072,7 +1075,12 @@ static bool fold_masks(OptContext *ctx, TCGOp *op)
if (a_mask =3D=3D 0) {
return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[1]);
}
- return false;
+
+ ts =3D arg_temp(op->args[0]);
+ reset_ts(ctx, ts);
+ ts_info(ts)->z_mask =3D z_mask;
+ ts_info(ts)->s_mask =3D s_mask;
+ return true;
}
=20
/*
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 03/46] tcg/optimize: Add fold_masks_zsa, fold_masks_zs,
fold_masks_z
Date: Tue, 10 Dec 2024 09:23:18 -0600
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Add additional routines to pass masks directly, rather than
storing them into OptContext. To be used in upcoming patches.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 1a9e3258e3..6644d24da6 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1045,11 +1045,9 @@ static bool fold_const2_commutative(OptContext *ctx,=
TCGOp *op)
return fold_const2(ctx, op);
}
=20
-static bool fold_masks(OptContext *ctx, TCGOp *op)
+static bool fold_masks_zsa(OptContext *ctx, TCGOp *op, uint64_t z_mask,
+ uint64_t s_mask, uint64_t a_mask)
{
- uint64_t a_mask =3D ctx->a_mask;
- uint64_t z_mask =3D ctx->z_mask;
- uint64_t s_mask =3D ctx->s_mask;
const TCGOpDef *def =3D &tcg_op_defs[op->opc];
TCGTemp *ts;
=20
@@ -1083,6 +1081,24 @@ static bool fold_masks(OptContext *ctx, TCGOp *op)
return true;
}
=20
+__attribute__((unused))
+static bool fold_masks_zs(OptContext *ctx, TCGOp *op,
+ uint64_t z_mask, uint64_t s_mask)
+{
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, -1);
+}
+
+__attribute__((unused))
+static bool fold_masks_z(OptContext *ctx, TCGOp *op, uint64_t z_mask)
+{
+ return fold_masks_zsa(ctx, op, z_mask, smask_from_zmask(z_mask), -1);
+}
+
+static bool fold_masks(OptContext *ctx, TCGOp *op)
+{
+ return fold_masks_zsa(ctx, op, ctx->z_mask, ctx->s_mask, ctx->a_mask);
+}
+
/*
* Convert @op to NOT, if NOT is supported by the host.
* Return true f the conversion is successful, which will still
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 04/46] tcg/optimize: Use finish_folding in fold_add,
fold_add_vec
Date: Tue, 10 Dec 2024 09:23:19 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6644d24da6..3f2f351bae 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -978,7 +978,7 @@ static void finish_ebb(OptContext *ctx)
finish_bb(ctx);
}
=20
-static void finish_folding(OptContext *ctx, TCGOp *op)
+static bool finish_folding(OptContext *ctx, TCGOp *op)
{
const TCGOpDef *def =3D &tcg_op_defs[op->opc];
int i, nb_oargs;
@@ -996,6 +996,7 @@ static void finish_folding(OptContext *ctx, TCGOp *op)
ts_info(ts)->s_mask =3D ctx->s_mask;
}
}
+ return true;
}
=20
/*
@@ -1214,7 +1215,7 @@ static bool fold_add(OptContext *ctx, TCGOp *op)
fold_xi_to_x(ctx, op, 0)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
/* We cannot as yet do_constant_folding with vectors. */
@@ -1224,7 +1225,7 @@ static bool fold_add_vec(OptContext *ctx, TCGOp *op)
fold_xi_to_x(ctx, op, 0)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_addsub2(OptContext *ctx, TCGOp *op, bool add)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 05/46] tcg/optimize: Use finish_folding in fold_addsub2
Date: Tue, 10 Dec 2024 09:23:20 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 3f2f351bae..135b14974f 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1292,7 +1292,7 @@ static bool fold_addsub2(OptContext *ctx, TCGOp *op, =
bool add)
op->args[4] =3D arg_new_constant(ctx, bl);
op->args[5] =3D arg_new_constant(ctx, bh);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_add2(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 06/46] tcg/optimize: Use fold_masks_zsa in fold_and
Date: Tue, 10 Dec 2024 09:23:21 -0600
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Avoid the use of the OptContext slots.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 135b14974f..000ac0f810 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1306,7 +1306,7 @@ static bool fold_add2(OptContext *ctx, TCGOp *op)
=20
static bool fold_and(OptContext *ctx, TCGOp *op)
{
- uint64_t z1, z2;
+ uint64_t z1, z2, z_mask, s_mask, a_mask =3D -1;
=20
if (fold_const2_commutative(ctx, op) ||
fold_xi_to_i(ctx, op, 0) ||
@@ -1317,24 +1317,24 @@ static bool fold_and(OptContext *ctx, TCGOp *op)
=20
z1 =3D arg_info(op->args[1])->z_mask;
z2 =3D arg_info(op->args[2])->z_mask;
- ctx->z_mask =3D z1 & z2;
+ z_mask =3D z1 & z2;
=20
/*
* Sign repetitions are perforce all identical, whether they are 1 or =
0.
* Bitwise operations preserve the relative quantity of the repetition=
s.
*/
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
=20
/*
* Known-zeros does not imply known-ones. Therefore unless
* arg2 is constant, we can't infer affected bits from it.
*/
if (arg_is_const(op->args[2])) {
- ctx->a_mask =3D z1 & ~z2;
+ a_mask =3D z1 & ~z2;
}
=20
- return fold_masks(ctx, op);
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_andc(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 07/46] tcg/optimize: Use fold_masks_zsa in fold_andc
Date: Tue, 10 Dec 2024 09:23:22 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 000ac0f810..285407ce05 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1339,7 +1339,7 @@ static bool fold_and(OptContext *ctx, TCGOp *op)
=20
static bool fold_andc(OptContext *ctx, TCGOp *op)
{
- uint64_t z1;
+ uint64_t z_mask, s_mask, a_mask =3D -1;
=20
if (fold_const2(ctx, op) ||
fold_xx_to_i(ctx, op, 0) ||
@@ -1348,7 +1348,7 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
return true;
}
=20
- z1 =3D arg_info(op->args[1])->z_mask;
+ z_mask =3D arg_info(op->args[1])->z_mask;
=20
/*
* Known-zeros does not imply known-ones. Therefore unless
@@ -1356,14 +1356,13 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
*/
if (arg_is_const(op->args[2])) {
uint64_t z2 =3D ~arg_info(op->args[2])->z_mask;
- ctx->a_mask =3D z1 & ~z2;
- z1 &=3D z2;
+ a_mask =3D z_mask & ~z2;
+ z_mask &=3D z2;
}
- ctx->z_mask =3D z1;
=20
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return fold_masks(ctx, op);
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_brcond(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 08/46] tcg/optimize: Use fold_masks_zs in fold_bswap
Date: Tue, 10 Dec 2024 09:23:23 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 285407ce05..3363ebd48c 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1082,7 +1082,6 @@ static bool fold_masks_zsa(OptContext *ctx, TCGOp *op=
, uint64_t z_mask,
return true;
}
=20
-__attribute__((unused))
static bool fold_masks_zs(OptContext *ctx, TCGOp *op,
uint64_t z_mask, uint64_t s_mask)
{
@@ -1528,10 +1527,8 @@ static bool fold_bswap(OptContext *ctx, TCGOp *op)
s_mask =3D 0;
break;
}
- ctx->z_mask =3D z_mask;
- ctx->s_mask =3D s_mask;
=20
- return fold_masks(ctx, op);
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
static bool fold_call(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 09/46] tcg/optimize: Use fold_masks_z in fold_count_zeros
Date: Tue, 10 Dec 2024 09:23:24 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 3363ebd48c..c97ec10989 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1088,7 +1088,6 @@ static bool fold_masks_zs(OptContext *ctx, TCGOp *op,
return fold_masks_zsa(ctx, op, z_mask, s_mask, -1);
}
=20
-__attribute__((unused))
static bool fold_masks_z(OptContext *ctx, TCGOp *op, uint64_t z_mask)
{
return fold_masks_zsa(ctx, op, z_mask, smask_from_zmask(z_mask), -1);
@@ -1592,9 +1591,9 @@ static bool fold_count_zeros(OptContext *ctx, TCGOp *=
op)
default:
g_assert_not_reached();
}
- ctx->z_mask =3D arg_info(op->args[2])->z_mask | z_mask;
- ctx->s_mask =3D smask_from_zmask(ctx->z_mask);
- return false;
+ z_mask |=3D arg_info(op->args[2])->z_mask;
+
+ return fold_masks_z(ctx, op, z_mask);
}
=20
static bool fold_ctpop(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 10/46] tcg/optimize: Use fold_masks_z in fold_ctpop
Date: Tue, 10 Dec 2024 09:23:25 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index c97ec10989..424ed7674d 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1598,22 +1598,23 @@ static bool fold_count_zeros(OptContext *ctx, TCGOp=
*op)
=20
static bool fold_ctpop(OptContext *ctx, TCGOp *op)
{
+ uint64_t z_mask;
+
if (fold_const1(ctx, op)) {
return true;
}
=20
switch (ctx->type) {
case TCG_TYPE_I32:
- ctx->z_mask =3D 32 | 31;
+ z_mask =3D 32 | 31;
break;
case TCG_TYPE_I64:
- ctx->z_mask =3D 64 | 63;
+ z_mask =3D 64 | 63;
break;
default:
g_assert_not_reached();
}
- ctx->s_mask =3D smask_from_zmask(ctx->z_mask);
- return false;
+ return fold_masks_z(ctx, op, z_mask);
}
=20
static bool fold_deposit(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 11/46] tcg/optimize: Use fold_and and fold_masks_z in
fold_deposit
Date: Tue, 10 Dec 2024 09:23:26 -0600
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When we fold to and, use fold_and, which sets s_mask
and a_mask more intelligently than we do for the
rest of deposit.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 424ed7674d..4d5fa04199 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1620,6 +1620,7 @@ static bool fold_ctpop(OptContext *ctx, TCGOp *op)
static bool fold_deposit(OptContext *ctx, TCGOp *op)
{
TCGOpcode and_opc;
+ uint64_t z_mask;
=20
if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) {
uint64_t t1 =3D arg_info(op->args[1])->val;
@@ -1647,8 +1648,7 @@ static bool fold_deposit(OptContext *ctx, TCGOp *op)
op->opc =3D and_opc;
op->args[1] =3D op->args[2];
op->args[2] =3D arg_new_constant(ctx, mask);
- ctx->z_mask =3D mask & arg_info(op->args[1])->z_mask;
- return false;
+ return fold_and(ctx, op);
}
=20
/* Inserting zero into a value. */
@@ -1657,14 +1657,12 @@ static bool fold_deposit(OptContext *ctx, TCGOp *op)
=20
op->opc =3D and_opc;
op->args[2] =3D arg_new_constant(ctx, mask);
- ctx->z_mask =3D mask & arg_info(op->args[1])->z_mask;
- return false;
+ return fold_and(ctx, op);
}
=20
- ctx->z_mask =3D deposit64(arg_info(op->args[1])->z_mask,
- op->args[3], op->args[4],
- arg_info(op->args[2])->z_mask);
- return false;
+ z_mask =3D deposit64(arg_info(op->args[1])->z_mask, op->args[3], op->a=
rgs[4],
+ arg_info(op->args[2])->z_mask);
+ return fold_masks_z(ctx, op, z_mask);
}
=20
static bool fold_divide(OptContext *ctx, TCGOp *op)
--=20
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To: qemu-devel@nongnu.org
Subject: [PATCH 12/46] tcg/optimize: Use finish_folding in fold_divide
Date: Tue, 10 Dec 2024 09:23:27 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 4d5fa04199..59f510b49a 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1671,7 +1671,7 @@ static bool fold_divide(OptContext *ctx, TCGOp *op)
fold_xi_to_x(ctx, op, 1)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_dup(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 13/46] tcg/optimize: Use finish_folding in fold_dup, fold_dup2
Date: Tue, 10 Dec 2024 09:23:28 -0600
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---
tcg/optimize.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 59f510b49a..e6dc9f2e28 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1681,7 +1681,7 @@ static bool fold_dup(OptContext *ctx, TCGOp *op)
t =3D dup_const(TCGOP_VECE(op), t);
return tcg_opt_gen_movi(ctx, op, op->args[0], t);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_dup2(OptContext *ctx, TCGOp *op)
@@ -1696,7 +1696,7 @@ static bool fold_dup2(OptContext *ctx, TCGOp *op)
op->opc =3D INDEX_op_dup_vec;
TCGOP_VECE(op) =3D MO_32;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_eqv(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 14/46] tcg/optimize: Use fold_masks_zs in fold_eqv
Date: Tue, 10 Dec 2024 09:23:29 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index e6dc9f2e28..5f3a824a07 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1701,15 +1701,17 @@ static bool fold_dup2(OptContext *ctx, TCGOp *op)
=20
static bool fold_eqv(OptContext *ctx, TCGOp *op)
{
+ uint64_t s_mask;
+
if (fold_const2_commutative(ctx, op) ||
fold_xi_to_x(ctx, op, -1) ||
fold_xi_to_not(ctx, op, 0)) {
return true;
}
=20
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return false;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, -1, s_mask);
}
=20
static bool fold_extract(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 15/46] tcg/optimize: Use fold_masks_zsa in fold_extract
Date: Tue, 10 Dec 2024 09:23:30 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5f3a824a07..955151f4cf 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1716,7 +1716,7 @@ static bool fold_eqv(OptContext *ctx, TCGOp *op)
=20
static bool fold_extract(OptContext *ctx, TCGOp *op)
{
- uint64_t z_mask_old, z_mask;
+ uint64_t z_mask_old, z_mask, s_mask, a_mask =3D -1;
int pos =3D op->args[2];
int len =3D op->args[3];
=20
@@ -1731,12 +1731,11 @@ static bool fold_extract(OptContext *ctx, TCGOp *op)
z_mask_old =3D arg_info(op->args[1])->z_mask;
z_mask =3D extract64(z_mask_old, pos, len);
if (pos =3D=3D 0) {
- ctx->a_mask =3D z_mask_old ^ z_mask;
+ a_mask =3D z_mask_old ^ z_mask;
}
- ctx->z_mask =3D z_mask;
- ctx->s_mask =3D smask_from_zmask(z_mask);
+ s_mask =3D smask_from_zmask(z_mask);
=20
- return fold_masks(ctx, op);
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_extract2(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 16/46] tcg/optimize: Use finish_folding in fold_extract2
Date: Tue, 10 Dec 2024 09:23:31 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 955151f4cf..a0ccf7f3f2 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1754,7 +1754,7 @@ static bool fold_extract2(OptContext *ctx, TCGOp *op)
}
return tcg_opt_gen_movi(ctx, op, op->args[0], v1 | v2);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_exts(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 17/46] tcg/optimize: Use fold_masks_zsa in fold_exts
Date: Tue, 10 Dec 2024 09:23:32 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index a0ccf7f3f2..5d10e704a7 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1759,7 +1759,7 @@ static bool fold_extract2(OptContext *ctx, TCGOp *op)
=20
static bool fold_exts(OptContext *ctx, TCGOp *op)
{
- uint64_t s_mask_old, s_mask, z_mask, sign;
+ uint64_t s_mask_old, s_mask, z_mask, a_mask =3D -1, sign;
bool type_change =3D false;
=20
if (fold_const1(ctx, op)) {
@@ -1795,13 +1795,11 @@ static bool fold_exts(OptContext *ctx, TCGOp *op)
}
s_mask |=3D sign << 1;
=20
- ctx->z_mask =3D z_mask;
- ctx->s_mask =3D s_mask;
if (!type_change) {
- ctx->a_mask =3D s_mask & ~s_mask_old;
+ a_mask =3D s_mask & ~s_mask_old;
}
=20
- return fold_masks(ctx, op);
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_extu(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 18/46] tcg/optimize: Use fold_masks_zsa in fold_extu
Date: Tue, 10 Dec 2024 09:23:33 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5d10e704a7..260e3ea072 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1804,7 +1804,7 @@ static bool fold_exts(OptContext *ctx, TCGOp *op)
=20
static bool fold_extu(OptContext *ctx, TCGOp *op)
{
- uint64_t z_mask_old, z_mask;
+ uint64_t z_mask_old, z_mask, s_mask, a_mask =3D -1;
bool type_change =3D false;
=20
if (fold_const1(ctx, op)) {
@@ -1835,12 +1835,12 @@ static bool fold_extu(OptContext *ctx, TCGOp *op)
g_assert_not_reached();
}
=20
- ctx->z_mask =3D z_mask;
- ctx->s_mask =3D smask_from_zmask(z_mask);
+ s_mask =3D smask_from_zmask(z_mask);
if (!type_change) {
- ctx->a_mask =3D z_mask_old ^ z_mask;
+ a_mask =3D z_mask_old ^ z_mask;
}
- return fold_masks(ctx, op);
+
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_mb(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 19/46] tcg/optimize: Use fold_masks_zs in fold_movcond
Date: Tue, 10 Dec 2024 09:23:34 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 260e3ea072..6d2d55f053 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1874,6 +1874,7 @@ static bool fold_mov(OptContext *ctx, TCGOp *op)
=20
static bool fold_movcond(OptContext *ctx, TCGOp *op)
{
+ uint64_t z_mask, s_mask;
int i;
=20
/* If true and false values are the same, eliminate the cmp. */
@@ -1895,10 +1896,10 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op)
return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]);
}
=20
- ctx->z_mask =3D arg_info(op->args[3])->z_mask
- | arg_info(op->args[4])->z_mask;
- ctx->s_mask =3D arg_info(op->args[3])->s_mask
- & arg_info(op->args[4])->s_mask;
+ z_mask =3D arg_info(op->args[3])->z_mask
+ | arg_info(op->args[4])->z_mask;
+ s_mask =3D arg_info(op->args[3])->s_mask
+ & arg_info(op->args[4])->s_mask;
=20
if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) {
uint64_t tv =3D arg_info(op->args[3])->val;
@@ -1941,7 +1942,7 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op)
}
}
}
- return false;
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
static bool fold_mul(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 20/46] tcg/optimize: Use finish_folding in fold_mul*
Date: Tue, 10 Dec 2024 09:23:35 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6d2d55f053..111969c2e3 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1952,7 +1952,7 @@ static bool fold_mul(OptContext *ctx, TCGOp *op)
fold_xi_to_x(ctx, op, 1)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_mul_highpart(OptContext *ctx, TCGOp *op)
@@ -1961,7 +1961,7 @@ static bool fold_mul_highpart(OptContext *ctx, TCGOp =
*op)
fold_xi_to_i(ctx, op, 0)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_multiply2(OptContext *ctx, TCGOp *op)
@@ -2006,7 +2006,7 @@ static bool fold_multiply2(OptContext *ctx, TCGOp *op)
tcg_opt_gen_movi(ctx, op2, rh, h);
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_nand(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 21/46] tcg/optimize: Use fold_masks_zs in fold_nand
Date: Tue, 10 Dec 2024 09:23:36 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 111969c2e3..924ee165ba 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2011,14 +2011,16 @@ static bool fold_multiply2(OptContext *ctx, TCGOp *=
op)
=20
static bool fold_nand(OptContext *ctx, TCGOp *op)
{
+ uint64_t s_mask;
+
if (fold_const2_commutative(ctx, op) ||
fold_xi_to_not(ctx, op, -1)) {
return true;
}
=20
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return false;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, -1, s_mask);
}
=20
static bool fold_neg_no_const(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 22/46] tcg/optimize: Use fold_masks_z in fold_neg_no_const
Date: Tue, 10 Dec 2024 09:23:37 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 924ee165ba..cc3dc91d3f 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2027,14 +2027,9 @@ static bool fold_neg_no_const(OptContext *ctx, TCGOp=
*op)
{
/* Set to 1 all bits to the left of the rightmost. */
uint64_t z_mask =3D arg_info(op->args[1])->z_mask;
- ctx->z_mask =3D -(z_mask & -z_mask);
+ z_mask =3D -(z_mask & -z_mask);
=20
- /*
- * Because of fold_sub_to_neg, we want to always return true,
- * via finish_folding.
- */
- finish_folding(ctx, op);
- return true;
+ return fold_masks_z(ctx, op, z_mask);
}
=20
static bool fold_neg(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 23/46] tcg/optimize: Use fold_masks_zs in fold_nor
Date: Tue, 10 Dec 2024 09:23:38 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index cc3dc91d3f..aa5242a380 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2039,14 +2039,16 @@ static bool fold_neg(OptContext *ctx, TCGOp *op)
=20
static bool fold_nor(OptContext *ctx, TCGOp *op)
{
+ uint64_t s_mask;
+
if (fold_const2_commutative(ctx, op) ||
fold_xi_to_not(ctx, op, 0)) {
return true;
}
=20
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return false;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, -1, s_mask);
}
=20
static bool fold_not(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 24/46] tcg/optimize: Use fold_masks_zs in fold_not
Date: Tue, 10 Dec 2024 09:23:39 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index aa5242a380..ae1386c681 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2056,12 +2056,7 @@ static bool fold_not(OptContext *ctx, TCGOp *op)
if (fold_const1(ctx, op)) {
return true;
}
-
- ctx->s_mask =3D arg_info(op->args[1])->s_mask;
-
- /* Because of fold_to_not, we want to always return true, via finish. =
*/
- finish_folding(ctx, op);
- return true;
+ return fold_masks_zs(ctx, op, -1, arg_info(op->args[1])->s_mask);
}
=20
static bool fold_or(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 25/46] tcg/optimize: Use fold_masks_zs in fold_or
Date: Tue, 10 Dec 2024 09:23:40 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index ae1386c681..3d852b44e4 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2061,17 +2061,19 @@ static bool fold_not(OptContext *ctx, TCGOp *op)
=20
static bool fold_or(OptContext *ctx, TCGOp *op)
{
+ uint64_t z_mask, s_mask;
+
if (fold_const2_commutative(ctx, op) ||
fold_xi_to_x(ctx, op, 0) ||
fold_xx_to_x(ctx, op)) {
return true;
}
=20
- ctx->z_mask =3D arg_info(op->args[1])->z_mask
- | arg_info(op->args[2])->z_mask;
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return fold_masks(ctx, op);
+ z_mask =3D arg_info(op->args[1])->z_mask
+ | arg_info(op->args[2])->z_mask;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
static bool fold_orc(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 26/46] tcg/optimize: Use fold_masks_zs in fold_orc
Date: Tue, 10 Dec 2024 09:23:41 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 3d852b44e4..76ad02d73b 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2078,6 +2078,8 @@ static bool fold_or(OptContext *ctx, TCGOp *op)
=20
static bool fold_orc(OptContext *ctx, TCGOp *op)
{
+ uint64_t s_mask;
+
if (fold_const2(ctx, op) ||
fold_xx_to_i(ctx, op, -1) ||
fold_xi_to_x(ctx, op, -1) ||
@@ -2085,9 +2087,9 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
return true;
}
=20
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return false;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, -1, s_mask);
}
=20
static bool fold_qemu_ld(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 27/46] tcg/optimize: Use fold_masks_zs in fold_qemu_ld
Date: Tue, 10 Dec 2024 09:23:42 -0600
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Be careful not to call fold_masks_zs when the memory operation
is wide enough to require multiple outputs, so split into two
functions: fold_qemu_ld_1reg and fold_qemu_ld_2reg.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 28 ++++++++++++++++++++++------
1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 76ad02d73b..6f41ef5adb 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2092,24 +2092,33 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
return fold_masks_zs(ctx, op, -1, s_mask);
}
=20
-static bool fold_qemu_ld(OptContext *ctx, TCGOp *op)
+static bool fold_qemu_ld_1reg(OptContext *ctx, TCGOp *op)
{
const TCGOpDef *def =3D &tcg_op_defs[op->opc];
MemOpIdx oi =3D op->args[def->nb_oargs + def->nb_iargs];
MemOp mop =3D get_memop(oi);
int width =3D 8 * memop_size(mop);
+ uint64_t z_mask =3D -1, s_mask =3D 0;
=20
if (width < 64) {
- ctx->s_mask =3D MAKE_64BIT_MASK(width, 64 - width);
+ s_mask =3D MAKE_64BIT_MASK(width, 64 - width);
if (!(mop & MO_SIGN)) {
- ctx->z_mask =3D MAKE_64BIT_MASK(0, width);
- ctx->s_mask <<=3D 1;
+ z_mask =3D MAKE_64BIT_MASK(0, width);
+ s_mask <<=3D 1;
}
}
=20
/* Opcodes that touch guest memory stop the mb optimization. */
ctx->prev_mb =3D NULL;
- return false;
+
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
+}
+
+static bool fold_qemu_ld_2reg(OptContext *ctx, TCGOp *op)
+{
+ /* Opcodes that touch guest memory stop the mb optimization. */
+ ctx->prev_mb =3D NULL;
+ return finish_folding(ctx, op);
}
=20
static bool fold_qemu_st(OptContext *ctx, TCGOp *op)
@@ -3001,11 +3010,18 @@ void tcg_optimize(TCGContext *s)
break;
case INDEX_op_qemu_ld_a32_i32:
case INDEX_op_qemu_ld_a64_i32:
+ done =3D fold_qemu_ld_1reg(&ctx, op);
+ break;
case INDEX_op_qemu_ld_a32_i64:
case INDEX_op_qemu_ld_a64_i64:
+ if (TCG_TARGET_REG_BITS =3D=3D 64) {
+ done =3D fold_qemu_ld_1reg(&ctx, op);
+ break;
+ }
+ QEMU_FALLTHROUGH;
case INDEX_op_qemu_ld_a32_i128:
case INDEX_op_qemu_ld_a64_i128:
- done =3D fold_qemu_ld(&ctx, op);
+ done =3D fold_qemu_ld_2reg(&ctx, op);
break;
case INDEX_op_qemu_st8_a32_i32:
case INDEX_op_qemu_st8_a64_i32:
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 28/46] tcg/optimize: Return true from fold_qemu_st,
fold_tcg_st
Date: Tue, 10 Dec 2024 09:23:43 -0600
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Stores have no output operands, and so need no further work.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6f41ef5adb..ee00620ce0 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2125,7 +2125,7 @@ static bool fold_qemu_st(OptContext *ctx, TCGOp *op)
{
/* Opcodes that touch guest memory stop the mb optimization. */
ctx->prev_mb =3D NULL;
- return false;
+ return true;
}
=20
static bool fold_remainder(OptContext *ctx, TCGOp *op)
@@ -2694,7 +2694,7 @@ static bool fold_tcg_st(OptContext *ctx, TCGOp *op)
=20
if (op->args[1] !=3D tcgv_ptr_arg(tcg_env)) {
remove_mem_copy_all(ctx);
- return false;
+ return true;
}
=20
switch (op->opc) {
@@ -2718,7 +2718,7 @@ static bool fold_tcg_st(OptContext *ctx, TCGOp *op)
g_assert_not_reached();
}
remove_mem_copy_in(ctx, ofs, ofs + lm1);
- return false;
+ return true;
}
=20
static bool fold_tcg_st_memcopy(OptContext *ctx, TCGOp *op)
@@ -2728,8 +2728,7 @@ static bool fold_tcg_st_memcopy(OptContext *ctx, TCGO=
p *op)
TCGType type;
=20
if (op->args[1] !=3D tcgv_ptr_arg(tcg_env)) {
- fold_tcg_st(ctx, op);
- return false;
+ return fold_tcg_st(ctx, op);
}
=20
src =3D arg_temp(op->args[0]);
@@ -2751,7 +2750,7 @@ static bool fold_tcg_st_memcopy(OptContext *ctx, TCGO=
p *op)
last =3D ofs + tcg_type_size(type) - 1;
remove_mem_copy_in(ctx, ofs, last);
record_mem_copy(ctx, type, src, ofs, last);
- return false;
+ return true;
}
=20
static bool fold_xor(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 29/46] tcg/optimize: Use finish_folding in fold_remainder
Date: Tue, 10 Dec 2024 09:23:44 -0600
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index ee00620ce0..eac5ef5eec 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2134,7 +2134,7 @@ static bool fold_remainder(OptContext *ctx, TCGOp *op)
fold_xx_to_i(ctx, op, 0)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_setcond_zmask(OptContext *ctx, TCGOp *op, bool neg)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 30/46] tcg/optimize: Distinguish simplification in
fold_setcond_zmask
Date: Tue, 10 Dec 2024 09:23:45 -0600
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Change return from bool to int; distinguish between
complete folding, simplification, and no change.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index eac5ef5eec..7b1d437c27 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2137,7 +2137,8 @@ static bool fold_remainder(OptContext *ctx, TCGOp *op)
return finish_folding(ctx, op);
}
=20
-static bool fold_setcond_zmask(OptContext *ctx, TCGOp *op, bool neg)
+/* Return 1 if finished, -1 if simplified, 0 if unchanged. */
+static int fold_setcond_zmask(OptContext *ctx, TCGOp *op, bool neg)
{
uint64_t a_zmask, b_val;
TCGCond cond;
@@ -2232,11 +2233,10 @@ static bool fold_setcond_zmask(OptContext *ctx, TCG=
Op *op, bool neg)
op->opc =3D xor_opc;
op->args[2] =3D arg_new_constant(ctx, 1);
}
- return false;
+ return -1;
}
}
-
- return false;
+ return 0;
}
=20
static void fold_setcond_tst_pow2(OptContext *ctx, TCGOp *op, bool neg)
@@ -2341,10 +2341,13 @@ static bool fold_setcond(OptContext *ctx, TCGOp *op)
return tcg_opt_gen_movi(ctx, op, op->args[0], i);
}
=20
- if (fold_setcond_zmask(ctx, op, false)) {
+ i =3D fold_setcond_zmask(ctx, op, false);
+ if (i > 0) {
return true;
}
- fold_setcond_tst_pow2(ctx, op, false);
+ if (i =3D=3D 0) {
+ fold_setcond_tst_pow2(ctx, op, false);
+ }
=20
ctx->z_mask =3D 1;
ctx->s_mask =3D smask_from_zmask(1);
@@ -2359,10 +2362,13 @@ static bool fold_negsetcond(OptContext *ctx, TCGOp =
*op)
return tcg_opt_gen_movi(ctx, op, op->args[0], -i);
}
=20
- if (fold_setcond_zmask(ctx, op, true)) {
+ i =3D fold_setcond_zmask(ctx, op, true);
+ if (i > 0) {
return true;
}
- fold_setcond_tst_pow2(ctx, op, true);
+ if (i =3D=3D 0) {
+ fold_setcond_tst_pow2(ctx, op, true);
+ }
=20
/* Value is {0,-1} so all bits are repetitions of the sign. */
ctx->s_mask =3D -1;
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 31/46] tcg/optimize: Use fold_masks_z in fold_setcond
Date: Tue, 10 Dec 2024 09:23:46 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 7b1d437c27..cfd4c08f11 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2349,9 +2349,7 @@ static bool fold_setcond(OptContext *ctx, TCGOp *op)
fold_setcond_tst_pow2(ctx, op, false);
}
=20
- ctx->z_mask =3D 1;
- ctx->s_mask =3D smask_from_zmask(1);
- return false;
+ return fold_masks_z(ctx, op, 1);
}
=20
static bool fold_negsetcond(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 32/46] tcg/optimize: Use fold_masks_zs in fold_negsetcond
Date: Tue, 10 Dec 2024 09:23:47 -0600
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---
tcg/optimize.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index cfd4c08f11..0097502425 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2369,8 +2369,7 @@ static bool fold_negsetcond(OptContext *ctx, TCGOp *o=
p)
}
=20
/* Value is {0,-1} so all bits are repetitions of the sign. */
- ctx->s_mask =3D -1;
- return false;
+ return fold_masks_zs(ctx, op, -1, -1);
}
=20
static bool fold_setcond2(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 33/46] tcg/optimize: Use fold_masks_z in fold_setcond2
Date: Tue, 10 Dec 2024 09:23:48 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 0097502425..dd6ef3d831 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2450,9 +2450,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op)
return fold_setcond(ctx, op);
}
=20
- ctx->z_mask =3D 1;
- ctx->s_mask =3D smask_from_zmask(1);
- return false;
+ return fold_masks_z(ctx, op, 1);
=20
do_setcond_const:
return tcg_opt_gen_movi(ctx, op, op->args[0], i);
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 34/46] tcg/optimize: Use finish_folding in fold_cmp_vec
Date: Tue, 10 Dec 2024 09:23:49 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index dd6ef3d831..30446baabd 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2462,7 +2462,7 @@ static bool fold_cmp_vec(OptContext *ctx, TCGOp *op)
if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
op->args[3] =3D tcg_swap_cond(op->args[3]);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 35/46] tcg/optimize: Use finish_folding in fold_cmpsel_vec
Date: Tue, 10 Dec 2024 09:23:50 -0600
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 30446baabd..c99e6f79d2 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2483,7 +2483,7 @@ static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *o=
p)
if (swap_commutative(op->args[0], &op->args[4], &op->args[3])) {
op->args[5] =3D tcg_invert_cond(op->args[5]);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_sextract(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 36/46] tcg/optimize: Use fold_masks_zsa in fold_sextract
Date: Tue, 10 Dec 2024 09:23:51 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index c99e6f79d2..551f96dfaa 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2488,7 +2488,7 @@ static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *o=
p)
=20
static bool fold_sextract(OptContext *ctx, TCGOp *op)
{
- uint64_t z_mask, s_mask, s_mask_old;
+ uint64_t z_mask, s_mask, s_mask_old, a_mask =3D -1;
int pos =3D op->args[2];
int len =3D op->args[3];
=20
@@ -2502,18 +2502,16 @@ static bool fold_sextract(OptContext *ctx, TCGOp *o=
p)
=20
z_mask =3D arg_info(op->args[1])->z_mask;
z_mask =3D sextract64(z_mask, pos, len);
- ctx->z_mask =3D z_mask;
=20
s_mask_old =3D arg_info(op->args[1])->s_mask;
s_mask =3D sextract64(s_mask_old, pos, len);
s_mask |=3D MAKE_64BIT_MASK(len, 64 - len);
- ctx->s_mask =3D s_mask;
=20
if (pos =3D=3D 0) {
- ctx->a_mask =3D s_mask & ~s_mask_old;
+ a_mask =3D s_mask & ~s_mask_old;
}
=20
- return fold_masks(ctx, op);
+ return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
static bool fold_shift(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 37/46] tcg/optimize: Use fold_masks_zs in fold_shift
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 551f96dfaa..bec5a07288 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2530,12 +2530,12 @@ static bool fold_shift(OptContext *ctx, TCGOp *op)
if (arg_is_const(op->args[2])) {
int sh =3D arg_info(op->args[2])->val;
=20
- ctx->z_mask =3D do_constant_folding(op->opc, ctx->type, z_mask, sh=
);
+ z_mask =3D do_constant_folding(op->opc, ctx->type, z_mask, sh);
=20
s_mask =3D do_constant_folding(op->opc, ctx->type, s_mask, sh);
- ctx->s_mask =3D smask_from_smask(s_mask);
+ s_mask =3D smask_from_smask(s_mask);
=20
- return fold_masks(ctx, op);
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
switch (op->opc) {
@@ -2544,23 +2544,22 @@ static bool fold_shift(OptContext *ctx, TCGOp *op)
* Arithmetic right shift will not reduce the number of
* input sign repetitions.
*/
- ctx->s_mask =3D s_mask;
- break;
+ return fold_masks_zs(ctx, op, -1, s_mask);
CASE_OP_32_64(shr):
/*
* If the sign bit is known zero, then logical right shift
- * will not reduced the number of input sign repetitions.
+ * will not reduce the number of input sign repetitions.
*/
sign =3D (s_mask & -s_mask) >> 1;
if (sign && !(z_mask & sign)) {
- ctx->s_mask =3D s_mask;
+ return fold_masks_zs(ctx, op, -1, s_mask);
}
break;
default:
break;
}
=20
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_sub_to_neg(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 38/46] tcg/optimize: Use finish_folding in fold_sub,
fold_sub_vec
Date: Tue, 10 Dec 2024 09:23:53 -0600
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Duplicate fold_sub_vec into fold_sub instead of calling it,
now that fold_sub_vec always returns true.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index bec5a07288..6412d5df37 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2606,12 +2606,15 @@ static bool fold_sub_vec(OptContext *ctx, TCGOp *op)
fold_sub_to_neg(ctx, op)) {
return true;
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_sub(OptContext *ctx, TCGOp *op)
{
- if (fold_const2(ctx, op) || fold_sub_vec(ctx, op)) {
+ if (fold_const2(ctx, op) ||
+ fold_xx_to_i(ctx, op, 0) ||
+ fold_xi_to_x(ctx, op, 0) ||
+ fold_sub_to_neg(ctx, op)) {
return true;
}
=20
@@ -2623,7 +2626,7 @@ static bool fold_sub(OptContext *ctx, TCGOp *op)
? INDEX_op_add_i32 : INDEX_op_add_i64);
op->args[2] =3D arg_new_constant(ctx, -val);
}
- return false;
+ return finish_folding(ctx, op);
}
=20
static bool fold_sub2(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 39/46] tcg/optimize: Use fold_masks_zs in fold_tcg_ld
Date: Tue, 10 Dec 2024 09:23:54 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6412d5df37..4cccb3b0cf 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2636,33 +2636,35 @@ static bool fold_sub2(OptContext *ctx, TCGOp *op)
=20
static bool fold_tcg_ld(OptContext *ctx, TCGOp *op)
{
+ uint64_t z_mask =3D -1, s_mask;
+
/* We can't do any folding with a load, but we can record bits. */
switch (op->opc) {
CASE_OP_32_64(ld8s):
- ctx->s_mask =3D MAKE_64BIT_MASK(8, 56);
+ s_mask =3D MAKE_64BIT_MASK(8, 56);
break;
CASE_OP_32_64(ld8u):
- ctx->z_mask =3D MAKE_64BIT_MASK(0, 8);
- ctx->s_mask =3D MAKE_64BIT_MASK(9, 55);
+ z_mask =3D MAKE_64BIT_MASK(0, 8);
+ s_mask =3D MAKE_64BIT_MASK(9, 55);
break;
CASE_OP_32_64(ld16s):
- ctx->s_mask =3D MAKE_64BIT_MASK(16, 48);
+ s_mask =3D MAKE_64BIT_MASK(16, 48);
break;
CASE_OP_32_64(ld16u):
- ctx->z_mask =3D MAKE_64BIT_MASK(0, 16);
- ctx->s_mask =3D MAKE_64BIT_MASK(17, 47);
+ z_mask =3D MAKE_64BIT_MASK(0, 16);
+ s_mask =3D MAKE_64BIT_MASK(17, 47);
break;
case INDEX_op_ld32s_i64:
- ctx->s_mask =3D MAKE_64BIT_MASK(32, 32);
+ s_mask =3D MAKE_64BIT_MASK(32, 32);
break;
case INDEX_op_ld32u_i64:
- ctx->z_mask =3D MAKE_64BIT_MASK(0, 32);
- ctx->s_mask =3D MAKE_64BIT_MASK(33, 31);
+ z_mask =3D MAKE_64BIT_MASK(0, 32);
+ s_mask =3D MAKE_64BIT_MASK(33, 31);
break;
default:
g_assert_not_reached();
}
- return false;
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
static bool fold_tcg_ld_memcopy(OptContext *ctx, TCGOp *op)
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 40/46] tcg/optimize: Use finish_folding in fold_tcg_ld_memcopy
Date: Tue, 10 Dec 2024 09:23:55 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 4cccb3b0cf..46116970f3 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2674,7 +2674,7 @@ static bool fold_tcg_ld_memcopy(OptContext *ctx, TCGO=
p *op)
TCGType type;
=20
if (op->args[1] !=3D tcgv_ptr_arg(tcg_env)) {
- return false;
+ return finish_folding(ctx, op);
}
=20
type =3D ctx->type;
--=20
2.43.0
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 41/46] tcg/optimize: Use fold_masks_zs in fold_xor
Date: Tue, 10 Dec 2024 09:23:56 -0600
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 46116970f3..fec46014be 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1093,11 +1093,6 @@ static bool fold_masks_z(OptContext *ctx, TCGOp *op,=
uint64_t z_mask)
return fold_masks_zsa(ctx, op, z_mask, smask_from_zmask(z_mask), -1);
}
=20
-static bool fold_masks(OptContext *ctx, TCGOp *op)
-{
- return fold_masks_zsa(ctx, op, ctx->z_mask, ctx->s_mask, ctx->a_mask);
-}
-
/*
* Convert @op to NOT, if NOT is supported by the host.
* Return true f the conversion is successful, which will still
@@ -2758,6 +2753,8 @@ static bool fold_tcg_st_memcopy(OptContext *ctx, TCGO=
p *op)
=20
static bool fold_xor(OptContext *ctx, TCGOp *op)
{
+ uint64_t z_mask, s_mask;
+
if (fold_const2_commutative(ctx, op) ||
fold_xx_to_i(ctx, op, 0) ||
fold_xi_to_x(ctx, op, 0) ||
@@ -2765,11 +2762,11 @@ static bool fold_xor(OptContext *ctx, TCGOp *op)
return true;
}
=20
- ctx->z_mask =3D arg_info(op->args[1])->z_mask
- | arg_info(op->args[2])->z_mask;
- ctx->s_mask =3D arg_info(op->args[1])->s_mask
- & arg_info(op->args[2])->s_mask;
- return fold_masks(ctx, op);
+ z_mask =3D arg_info(op->args[1])->z_mask
+ | arg_info(op->args[2])->z_mask;
+ s_mask =3D arg_info(op->args[1])->s_mask
+ & arg_info(op->args[2])->s_mask;
+ return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
static bool fold_bitsel_vec(OptContext *ctx, TCGOp *op)
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 42/46] tcg/optimize: Use finish_folding in fold_bitsel_vec
Date: Tue, 10 Dec 2024 09:23:57 -0600
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---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index fec46014be..24ec14f476 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2821,7 +2821,7 @@ static bool fold_bitsel_vec(OptContext *ctx, TCGOp *o=
p)
return fold_orc(ctx, op);
}
}
- return false;
+ return finish_folding(ctx, op);
}
=20
/* Propagate constants and copies, fold constant expressions. */
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 43/46] tcg/optimize: Use finish_folding as default in
tcg_optimize
Date: Tue, 10 Dec 2024 09:23:58 -0600
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All non-default cases now finish folding within each function.
Do the same with the default case and assert it is done after.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 24ec14f476..94e942e1cf 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -3085,11 +3085,9 @@ void tcg_optimize(TCGContext *s)
done =3D true;
break;
default:
+ done =3D finish_folding(&ctx, op);
break;
}
-
- if (!done) {
- finish_folding(&ctx, op);
- }
+ tcg_debug_assert(done);
}
}
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 44/46] tcg/optimize: Remove [zsa]_mask from OptContext
Date: Tue, 10 Dec 2024 09:23:59 -0600
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All mask setting is now done with parameters via fold_masks_*.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 16 ----------------
1 file changed, 16 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 94e942e1cf..eb6e93809e 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -64,9 +64,6 @@ typedef struct OptContext {
QSIMPLEQ_HEAD(, MemCopyInfo) mem_free;
=20
/* In flight values from optimization. */
- uint64_t a_mask; /* mask bit is 0 iff value identical to first input =
*/
- uint64_t z_mask; /* mask bit is 0 iff value bit is 0 */
- uint64_t s_mask; /* mask of clrsb(value) bits */
TCGType type;
} OptContext;
=20
@@ -987,14 +984,6 @@ static bool finish_folding(OptContext *ctx, TCGOp *op)
for (i =3D 0; i < nb_oargs; i++) {
TCGTemp *ts =3D arg_temp(op->args[i]);
reset_ts(ctx, ts);
- /*
- * Save the corresponding known-zero/sign bits mask for the
- * first output argument (only one supported so far).
- */
- if (i =3D=3D 0) {
- ts_info(ts)->z_mask =3D ctx->z_mask;
- ts_info(ts)->s_mask =3D ctx->s_mask;
- }
}
return true;
}
@@ -2867,11 +2856,6 @@ void tcg_optimize(TCGContext *s)
ctx.type =3D TCG_TYPE_I32;
}
=20
- /* Assume all bits affected, no bits known zero, no sign reps. */
- ctx.a_mask =3D -1;
- ctx.z_mask =3D -1;
- ctx.s_mask =3D 0;
-
/*
* Process each opcode.
* Sorted alphabetically by opcode as much as possible.
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 45/46] tcg/optimize: Move fold_bitsel_vec into alphabetic sort
Date: Tue, 10 Dec 2024 09:24:00 -0600
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The big comment just above says functions should be sorted.
Add forward declarations as needed.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 114 +++++++++++++++++++++++++------------------------
1 file changed, 59 insertions(+), 55 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index eb6e93809e..54082042aa 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1191,6 +1191,10 @@ static bool fold_xx_to_x(OptContext *ctx, TCGOp *op)
* 3) those that produce information about the result value.
*/
=20
+static bool fold_or(OptContext *ctx, TCGOp *op);
+static bool fold_orc(OptContext *ctx, TCGOp *op);
+static bool fold_xor(OptContext *ctx, TCGOp *op);
+
static bool fold_add(OptContext *ctx, TCGOp *op)
{
if (fold_const2_commutative(ctx, op) ||
@@ -1347,6 +1351,61 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
return fold_masks_zsa(ctx, op, z_mask, s_mask, a_mask);
}
=20
+static bool fold_bitsel_vec(OptContext *ctx, TCGOp *op)
+{
+ /* If true and false values are the same, eliminate the cmp. */
+ if (args_are_copies(op->args[2], op->args[3])) {
+ return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[2]);
+ }
+
+ if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])) {
+ uint64_t tv =3D arg_info(op->args[2])->val;
+ uint64_t fv =3D arg_info(op->args[3])->val;
+
+ if (tv =3D=3D -1 && fv =3D=3D 0) {
+ return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[1]);
+ }
+ if (tv =3D=3D 0 && fv =3D=3D -1) {
+ if (TCG_TARGET_HAS_not_vec) {
+ op->opc =3D INDEX_op_not_vec;
+ return fold_not(ctx, op);
+ } else {
+ op->opc =3D INDEX_op_xor_vec;
+ op->args[2] =3D arg_new_constant(ctx, -1);
+ return fold_xor(ctx, op);
+ }
+ }
+ }
+ if (arg_is_const(op->args[2])) {
+ uint64_t tv =3D arg_info(op->args[2])->val;
+ if (tv =3D=3D -1) {
+ op->opc =3D INDEX_op_or_vec;
+ op->args[2] =3D op->args[3];
+ return fold_or(ctx, op);
+ }
+ if (tv =3D=3D 0 && TCG_TARGET_HAS_andc_vec) {
+ op->opc =3D INDEX_op_andc_vec;
+ op->args[2] =3D op->args[1];
+ op->args[1] =3D op->args[3];
+ return fold_andc(ctx, op);
+ }
+ }
+ if (arg_is_const(op->args[3])) {
+ uint64_t fv =3D arg_info(op->args[3])->val;
+ if (fv =3D=3D 0) {
+ op->opc =3D INDEX_op_and_vec;
+ return fold_and(ctx, op);
+ }
+ if (fv =3D=3D -1 && TCG_TARGET_HAS_orc_vec) {
+ op->opc =3D INDEX_op_orc_vec;
+ op->args[2] =3D op->args[1];
+ op->args[1] =3D op->args[3];
+ return fold_orc(ctx, op);
+ }
+ }
+ return finish_folding(ctx, op);
+}
+
static bool fold_brcond(OptContext *ctx, TCGOp *op)
{
int i =3D do_constant_folding_cond1(ctx, op, NO_DEST, &op->args[0],
@@ -2758,61 +2817,6 @@ static bool fold_xor(OptContext *ctx, TCGOp *op)
return fold_masks_zs(ctx, op, z_mask, s_mask);
}
=20
-static bool fold_bitsel_vec(OptContext *ctx, TCGOp *op)
-{
- /* If true and false values are the same, eliminate the cmp. */
- if (args_are_copies(op->args[2], op->args[3])) {
- return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[2]);
- }
-
- if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])) {
- uint64_t tv =3D arg_info(op->args[2])->val;
- uint64_t fv =3D arg_info(op->args[3])->val;
-
- if (tv =3D=3D -1 && fv =3D=3D 0) {
- return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[1]);
- }
- if (tv =3D=3D 0 && fv =3D=3D -1) {
- if (TCG_TARGET_HAS_not_vec) {
- op->opc =3D INDEX_op_not_vec;
- return fold_not(ctx, op);
- } else {
- op->opc =3D INDEX_op_xor_vec;
- op->args[2] =3D arg_new_constant(ctx, -1);
- return fold_xor(ctx, op);
- }
- }
- }
- if (arg_is_const(op->args[2])) {
- uint64_t tv =3D arg_info(op->args[2])->val;
- if (tv =3D=3D -1) {
- op->opc =3D INDEX_op_or_vec;
- op->args[2] =3D op->args[3];
- return fold_or(ctx, op);
- }
- if (tv =3D=3D 0 && TCG_TARGET_HAS_andc_vec) {
- op->opc =3D INDEX_op_andc_vec;
- op->args[2] =3D op->args[1];
- op->args[1] =3D op->args[3];
- return fold_andc(ctx, op);
- }
- }
- if (arg_is_const(op->args[3])) {
- uint64_t fv =3D arg_info(op->args[3])->val;
- if (fv =3D=3D 0) {
- op->opc =3D INDEX_op_and_vec;
- return fold_and(ctx, op);
- }
- if (fv =3D=3D -1 && TCG_TARGET_HAS_orc_vec) {
- op->opc =3D INDEX_op_orc_vec;
- op->args[2] =3D op->args[1];
- op->args[1] =3D op->args[3];
- return fold_orc(ctx, op);
- }
- }
- return finish_folding(ctx, op);
-}
-
/* Propagate constants and copies, fold constant expressions. */
void tcg_optimize(TCGContext *s)
{
--=20
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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH 46/46] tcg/optimize: Move fold_cmp_vec,
fold_cmpsel_vec into alphabetic sort
Date: Tue, 10 Dec 2024 09:24:01 -0600
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The big comment just above says functions should be sorted.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
tcg/optimize.c | 60 +++++++++++++++++++++++++-------------------------
1 file changed, 30 insertions(+), 30 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 54082042aa..2c5691e3c9 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1610,6 +1610,36 @@ static bool fold_call(OptContext *ctx, TCGOp *op)
return true;
}
=20
+static bool fold_cmp_vec(OptContext *ctx, TCGOp *op)
+{
+ /* Canonicalize the comparison to put immediate second. */
+ if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
+ op->args[3] =3D tcg_swap_cond(op->args[3]);
+ }
+ return finish_folding(ctx, op);
+}
+
+static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *op)
+{
+ /* If true and false values are the same, eliminate the cmp. */
+ if (args_are_copies(op->args[3], op->args[4])) {
+ return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[3]);
+ }
+
+ /* Canonicalize the comparison to put immediate second. */
+ if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
+ op->args[5] =3D tcg_swap_cond(op->args[5]);
+ }
+ /*
+ * Canonicalize the "false" input reg to match the destination,
+ * so that the tcg backend can implement "move if true".
+ */
+ if (swap_commutative(op->args[0], &op->args[4], &op->args[3])) {
+ op->args[5] =3D tcg_invert_cond(op->args[5]);
+ }
+ return finish_folding(ctx, op);
+}
+
static bool fold_count_zeros(OptContext *ctx, TCGOp *op)
{
uint64_t z_mask;
@@ -2499,36 +2529,6 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op)
return tcg_opt_gen_movi(ctx, op, op->args[0], i);
}
=20
-static bool fold_cmp_vec(OptContext *ctx, TCGOp *op)
-{
- /* Canonicalize the comparison to put immediate second. */
- if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
- op->args[3] =3D tcg_swap_cond(op->args[3]);
- }
- return finish_folding(ctx, op);
-}
-
-static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *op)
-{
- /* If true and false values are the same, eliminate the cmp. */
- if (args_are_copies(op->args[3], op->args[4])) {
- return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[3]);
- }
-
- /* Canonicalize the comparison to put immediate second. */
- if (swap_commutative(NO_DEST, &op->args[1], &op->args[2])) {
- op->args[5] =3D tcg_swap_cond(op->args[5]);
- }
- /*
- * Canonicalize the "false" input reg to match the destination,
- * so that the tcg backend can implement "move if true".
- */
- if (swap_commutative(op->args[0], &op->args[4], &op->args[3])) {
- op->args[5] =3D tcg_invert_cond(op->args[5]);
- }
- return finish_folding(ctx, op);
-}
-
static bool fold_sextract(OptContext *ctx, TCGOp *op)
{
uint64_t z_mask, s_mask, s_mask_old, a_mask =3D -1;
--=20
2.43.0