temps[temp].mask = -1;
}
+static TCGOp *insert_op_before(TCGContext *s, TCGOp *old_op,
+ TCGOpcode opc, int nargs)
+{
+ int oi = s->gen_next_op_idx;
+ int pi = s->gen_next_parm_idx;
+ int prev = old_op->prev;
+ int next = old_op - s->gen_op_buf;
+ TCGOp *new_op;
+
+ tcg_debug_assert(oi < OPC_BUF_SIZE);
+ tcg_debug_assert(pi + nargs <= OPPARAM_BUF_SIZE);
+ s->gen_next_op_idx = oi + 1;
+ s->gen_next_parm_idx = pi + nargs;
+
+ new_op = &s->gen_op_buf[oi];
+ *new_op = (TCGOp){
+ .opc = opc,
+ .args = pi,
+ .prev = prev,
+ .next = next
+ };
+ if (prev >= 0) {
+ s->gen_op_buf[prev].next = oi;
+ } else {
+ s->gen_first_op_idx = oi;
+ }
+ old_op->prev = oi;
+
+ return new_op;
+}
+
/* Reset all temporaries, given that there are NB_TEMPS of them. */
static void reset_all_temps(int nb_temps)
{
return def->flags & TCG_OPF_64BIT ? 64 : 32;
}
+static TCGOpcode op_to_mov(TCGOpcode op)
+{
+ switch (op_bits(op)) {
+ case 32:
+ return INDEX_op_mov_i32;
+ case 64:
+ return INDEX_op_mov_i64;
+ default:
+ fprintf(stderr, "op_to_mov: unexpected return value of "
+ "function op_bits.\n");
+ tcg_abort();
+ }
+}
+
static TCGOpcode op_to_movi(TCGOpcode op)
{
switch (op_bits(op)) {
return false;
}
-static void tcg_opt_gen_mov(TCGContext *s, TCGArg *gen_args,
- TCGArg dst, TCGArg src)
+static void tcg_opt_gen_mov(TCGContext *s, TCGOp *op, TCGArg *args,
+ TCGOpcode old_op, TCGArg dst, TCGArg src)
{
+ TCGOpcode new_op = op_to_mov(old_op);
+ tcg_target_ulong mask;
+
+ op->opc = new_op;
+
reset_temp(dst);
- temps[dst].mask = temps[src].mask;
+ mask = temps[src].mask;
+ if (TCG_TARGET_REG_BITS > 32 && new_op == INDEX_op_mov_i32) {
+ /* High bits of the destination are now garbage. */
+ mask |= ~0xffffffffull;
+ }
+ temps[dst].mask = mask;
+
assert(temps[src].state != TCG_TEMP_CONST);
if (s->temps[src].type == s->temps[dst].type) {
temps[src].next_copy = dst;
}
- gen_args[0] = dst;
- gen_args[1] = src;
+ args[0] = dst;
+ args[1] = src;
}
-static void tcg_opt_gen_movi(TCGArg *gen_args, TCGArg dst, TCGArg val)
+static void tcg_opt_gen_movi(TCGContext *s, TCGOp *op, TCGArg *args,
+ TCGOpcode old_op, TCGArg dst, TCGArg val)
{
+ TCGOpcode new_op = op_to_movi(old_op);
+ tcg_target_ulong mask;
+
+ op->opc = new_op;
+
reset_temp(dst);
temps[dst].state = TCG_TEMP_CONST;
temps[dst].val = val;
- temps[dst].mask = val;
- gen_args[0] = dst;
- gen_args[1] = val;
-}
-
-static TCGOpcode op_to_mov(TCGOpcode op)
-{
- switch (op_bits(op)) {
- case 32:
- return INDEX_op_mov_i32;
- case 64:
- return INDEX_op_mov_i64;
- default:
- fprintf(stderr, "op_to_mov: unexpected return value of "
- "function op_bits.\n");
- tcg_abort();
+ mask = val;
+ if (TCG_TARGET_REG_BITS > 32 && new_op == INDEX_op_mov_i32) {
+ /* High bits of the destination are now garbage. */
+ mask |= ~0xffffffffull;
}
+ temps[dst].mask = mask;
+
+ args[0] = dst;
+ args[1] = val;
}
static TCGArg do_constant_folding_2(TCGOpcode op, TCGArg x, TCGArg y)
}
/* Propagate constants and copies, fold constant expressions. */
-static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
- TCGArg *args, TCGOpDef *tcg_op_defs)
+static void tcg_constant_folding(TCGContext *s)
{
- int i, nb_ops, op_index, nb_temps, nb_globals, nb_call_args;
- tcg_target_ulong mask, affected;
- TCGOpcode op;
- const TCGOpDef *def;
- TCGArg *gen_args;
- TCGArg tmp;
+ int oi, oi_next, nb_temps, nb_globals;
/* Array VALS has an element for each temp.
If this temp holds a constant then its value is kept in VALS' element.
nb_globals = s->nb_globals;
reset_all_temps(nb_temps);
- nb_ops = tcg_opc_ptr - s->gen_opc_buf;
- gen_args = args;
- for (op_index = 0; op_index < nb_ops; op_index++) {
- op = s->gen_opc_buf[op_index];
- def = &tcg_op_defs[op];
- /* Do copy propagation */
- if (op == INDEX_op_call) {
- int nb_oargs = args[0] >> 16;
- int nb_iargs = args[0] & 0xffff;
- for (i = nb_oargs + 1; i < nb_oargs + nb_iargs + 1; i++) {
- if (temps[args[i]].state == TCG_TEMP_COPY) {
- args[i] = find_better_copy(s, args[i]);
- }
- }
+ for (oi = s->gen_first_op_idx; oi >= 0; oi = oi_next) {
+ tcg_target_ulong mask, partmask, affected;
+ int nb_oargs, nb_iargs, i;
+ TCGArg tmp;
+
+ TCGOp * const op = &s->gen_op_buf[oi];
+ TCGArg * const args = &s->gen_opparam_buf[op->args];
+ TCGOpcode opc = op->opc;
+ const TCGOpDef *def = &tcg_op_defs[opc];
+
+ oi_next = op->next;
+ if (opc == INDEX_op_call) {
+ nb_oargs = op->callo;
+ nb_iargs = op->calli;
} else {
- for (i = def->nb_oargs; i < def->nb_oargs + def->nb_iargs; i++) {
- if (temps[args[i]].state == TCG_TEMP_COPY) {
- args[i] = find_better_copy(s, args[i]);
- }
+ nb_oargs = def->nb_oargs;
+ nb_iargs = def->nb_iargs;
+ }
+
+ /* Do copy propagation */
+ for (i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
+ if (temps[args[i]].state == TCG_TEMP_COPY) {
+ args[i] = find_better_copy(s, args[i]);
}
}
/* For commutative operations make constant second argument */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(add):
CASE_OP_32_64(mul):
CASE_OP_32_64(and):
/* Simplify expressions for "shift/rot r, 0, a => movi r, 0",
and "sub r, 0, a => neg r, a" case. */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(shl):
CASE_OP_32_64(shr):
CASE_OP_32_64(sar):
CASE_OP_32_64(rotr):
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[1]].val == 0) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], 0);
- args += 3;
- gen_args += 2;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
continue;
}
break;
/* Proceed with possible constant folding. */
break;
}
- if (op == INDEX_op_sub_i32) {
+ if (opc == INDEX_op_sub_i32) {
neg_op = INDEX_op_neg_i32;
have_neg = TCG_TARGET_HAS_neg_i32;
} else {
}
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[1]].val == 0) {
- s->gen_opc_buf[op_index] = neg_op;
+ op->opc = neg_op;
reset_temp(args[0]);
- gen_args[0] = args[0];
- gen_args[1] = args[2];
- args += 3;
- gen_args += 2;
+ args[1] = args[2];
continue;
}
}
if (!have_not) {
break;
}
- s->gen_opc_buf[op_index] = not_op;
+ op->opc = not_op;
reset_temp(args[0]);
- gen_args[0] = args[0];
- gen_args[1] = args[i];
- args += 3;
- gen_args += 2;
+ args[1] = args[i];
continue;
}
default:
}
/* Simplify expression for "op r, a, const => mov r, a" cases */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(add):
CASE_OP_32_64(sub):
CASE_OP_32_64(shl):
break;
do_mov3:
if (temps_are_copies(args[0], args[1])) {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
} else {
- s->gen_opc_buf[op_index] = op_to_mov(op);
- tcg_opt_gen_mov(s, gen_args, args[0], args[1]);
- gen_args += 2;
+ tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
}
- args += 3;
continue;
default:
break;
output argument is supported. */
mask = -1;
affected = -1;
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(ext8s):
if ((temps[args[1]].mask & 0x80) != 0) {
break;
break;
CASE_OP_32_64(setcond):
+ case INDEX_op_setcond2_i32:
mask = 1;
break;
break;
CASE_OP_32_64(ld8u):
- case INDEX_op_qemu_ld8u:
mask = 0xff;
break;
CASE_OP_32_64(ld16u):
- case INDEX_op_qemu_ld16u:
mask = 0xffff;
break;
case INDEX_op_ld32u_i64:
-#if TCG_TARGET_REG_BITS == 64
- case INDEX_op_qemu_ld32u:
-#endif
mask = 0xffffffffu;
break;
CASE_OP_32_64(qemu_ld):
{
- TCGMemOp mop = args[def->nb_oargs + def->nb_iargs];
+ TCGMemOp mop = args[nb_oargs + nb_iargs];
if (!(mop & MO_SIGN)) {
mask = (2ULL << ((8 << (mop & MO_SIZE)) - 1)) - 1;
}
break;
}
- /* 32-bit ops (non 64-bit ops and non load/store ops) generate 32-bit
- results */
- if (!(def->flags & (TCG_OPF_CALL_CLOBBER | TCG_OPF_64BIT))) {
- mask &= 0xffffffffu;
+ /* 32-bit ops generate 32-bit results. For the result is zero test
+ below, we can ignore high bits, but for further optimizations we
+ need to record that the high bits contain garbage. */
+ partmask = mask;
+ if (!(def->flags & TCG_OPF_64BIT)) {
+ mask |= ~(tcg_target_ulong)0xffffffffu;
+ partmask &= 0xffffffffu;
+ affected &= 0xffffffffu;
}
- if (mask == 0) {
- assert(def->nb_oargs == 1);
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], 0);
- args += def->nb_oargs + def->nb_iargs + def->nb_cargs;
- gen_args += 2;
+ if (partmask == 0) {
+ assert(nb_oargs == 1);
+ tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
continue;
}
if (affected == 0) {
- assert(def->nb_oargs == 1);
+ assert(nb_oargs == 1);
if (temps_are_copies(args[0], args[1])) {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
} else if (temps[args[1]].state != TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_mov(op);
- tcg_opt_gen_mov(s, gen_args, args[0], args[1]);
- gen_args += 2;
+ tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
} else {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], temps[args[1]].val);
- gen_args += 2;
+ tcg_opt_gen_movi(s, op, args, opc,
+ args[0], temps[args[1]].val);
}
- args += def->nb_iargs + 1;
continue;
}
/* Simplify expression for "op r, a, 0 => movi r, 0" cases */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(and):
CASE_OP_32_64(mul):
CASE_OP_32_64(muluh):
CASE_OP_32_64(mulsh):
if ((temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[2]].val == 0)) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], 0);
- args += 3;
- gen_args += 2;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
continue;
}
break;
}
/* Simplify expression for "op r, a, a => mov r, a" cases */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(or):
CASE_OP_32_64(and):
if (temps_are_copies(args[1], args[2])) {
if (temps_are_copies(args[0], args[1])) {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
} else {
- s->gen_opc_buf[op_index] = op_to_mov(op);
- tcg_opt_gen_mov(s, gen_args, args[0], args[1]);
- gen_args += 2;
+ tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
}
- args += 3;
continue;
}
break;
}
/* Simplify expression for "op r, a, a => movi r, 0" cases */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(andc):
CASE_OP_32_64(sub):
CASE_OP_32_64(xor):
if (temps_are_copies(args[1], args[2])) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], 0);
- gen_args += 2;
- args += 3;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
continue;
}
break;
/* Propagate constants through copy operations and do constant
folding. Constants will be substituted to arguments by register
allocator where needed and possible. Also detect copies. */
- switch (op) {
+ switch (opc) {
CASE_OP_32_64(mov):
if (temps_are_copies(args[0], args[1])) {
- args += 2;
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
break;
}
if (temps[args[1]].state != TCG_TEMP_CONST) {
- tcg_opt_gen_mov(s, gen_args, args[0], args[1]);
- gen_args += 2;
- args += 2;
+ tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
break;
}
/* Source argument is constant. Rewrite the operation and
let movi case handle it. */
- op = op_to_movi(op);
- s->gen_opc_buf[op_index] = op;
args[1] = temps[args[1]].val;
/* fallthrough */
CASE_OP_32_64(movi):
- tcg_opt_gen_movi(gen_args, args[0], args[1]);
- gen_args += 2;
- args += 2;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], args[1]);
break;
CASE_OP_32_64(not):
case INDEX_op_ext32s_i64:
case INDEX_op_ext32u_i64:
if (temps[args[1]].state == TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tmp = do_constant_folding(op, temps[args[1]].val, 0);
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
- args += 2;
+ tmp = do_constant_folding(opc, temps[args[1]].val, 0);
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
break;
}
goto do_default;
case INDEX_op_trunc_shr_i32:
if (temps[args[1]].state == TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tmp = do_constant_folding(op, temps[args[1]].val, args[2]);
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
- args += 3;
+ tmp = do_constant_folding(opc, temps[args[1]].val, args[2]);
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
break;
}
goto do_default;
CASE_OP_32_64(remu):
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[2]].state == TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tmp = do_constant_folding(op, temps[args[1]].val,
+ tmp = do_constant_folding(opc, temps[args[1]].val,
temps[args[2]].val);
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
- args += 3;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
break;
}
goto do_default;
CASE_OP_32_64(deposit):
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[2]].state == TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
tmp = deposit64(temps[args[1]].val, args[3], args[4],
temps[args[2]].val);
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
- args += 5;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
break;
}
goto do_default;
CASE_OP_32_64(setcond):
- tmp = do_constant_folding_cond(op, args[1], args[2], args[3]);
+ tmp = do_constant_folding_cond(opc, args[1], args[2], args[3]);
if (tmp != 2) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
- args += 4;
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
break;
}
goto do_default;
CASE_OP_32_64(brcond):
- tmp = do_constant_folding_cond(op, args[0], args[1], args[2]);
+ tmp = do_constant_folding_cond(opc, args[0], args[1], args[2]);
if (tmp != 2) {
if (tmp) {
reset_all_temps(nb_temps);
- s->gen_opc_buf[op_index] = INDEX_op_br;
- gen_args[0] = args[3];
- gen_args += 1;
+ op->opc = INDEX_op_br;
+ args[0] = args[3];
} else {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
}
- args += 4;
break;
}
goto do_default;
CASE_OP_32_64(movcond):
- tmp = do_constant_folding_cond(op, args[1], args[2], args[5]);
+ tmp = do_constant_folding_cond(opc, args[1], args[2], args[5]);
if (tmp != 2) {
if (temps_are_copies(args[0], args[4-tmp])) {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ tcg_op_remove(s, op);
} else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
- s->gen_opc_buf[op_index] = op_to_movi(op);
- tcg_opt_gen_movi(gen_args, args[0], temps[args[4-tmp]].val);
- gen_args += 2;
+ tcg_opt_gen_movi(s, op, args, opc,
+ args[0], temps[args[4-tmp]].val);
} else {
- s->gen_opc_buf[op_index] = op_to_mov(op);
- tcg_opt_gen_mov(s, gen_args, args[0], args[4-tmp]);
- gen_args += 2;
+ tcg_opt_gen_mov(s, op, args, opc, args[0], args[4-tmp]);
}
- args += 6;
break;
}
goto do_default;
uint64_t a = ((uint64_t)ah << 32) | al;
uint64_t b = ((uint64_t)bh << 32) | bl;
TCGArg rl, rh;
+ TCGOp *op2 = insert_op_before(s, op, INDEX_op_movi_i32, 2);
+ TCGArg *args2 = &s->gen_opparam_buf[op2->args];
- if (op == INDEX_op_add2_i32) {
+ if (opc == INDEX_op_add2_i32) {
a += b;
} else {
a -= b;
}
- /* We emit the extra nop when we emit the add2/sub2. */
- assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);
-
rl = args[0];
rh = args[1];
- s->gen_opc_buf[op_index] = INDEX_op_movi_i32;
- s->gen_opc_buf[++op_index] = INDEX_op_movi_i32;
- tcg_opt_gen_movi(&gen_args[0], rl, (uint32_t)a);
- tcg_opt_gen_movi(&gen_args[2], rh, (uint32_t)(a >> 32));
- gen_args += 4;
- args += 6;
+ tcg_opt_gen_movi(s, op, args, opc, rl, (uint32_t)a);
+ tcg_opt_gen_movi(s, op2, args2, opc, rh, (uint32_t)(a >> 32));
+
+ /* We've done all we need to do with the movi. Skip it. */
+ oi_next = op2->next;
break;
}
goto do_default;
uint32_t b = temps[args[3]].val;
uint64_t r = (uint64_t)a * b;
TCGArg rl, rh;
-
- /* We emit the extra nop when we emit the mulu2. */
- assert(s->gen_opc_buf[op_index + 1] == INDEX_op_nop);
+ TCGOp *op2 = insert_op_before(s, op, INDEX_op_movi_i32, 2);
+ TCGArg *args2 = &s->gen_opparam_buf[op2->args];
rl = args[0];
rh = args[1];
- s->gen_opc_buf[op_index] = INDEX_op_movi_i32;
- s->gen_opc_buf[++op_index] = INDEX_op_movi_i32;
- tcg_opt_gen_movi(&gen_args[0], rl, (uint32_t)r);
- tcg_opt_gen_movi(&gen_args[2], rh, (uint32_t)(r >> 32));
- gen_args += 4;
- args += 4;
+ tcg_opt_gen_movi(s, op, args, opc, rl, (uint32_t)r);
+ tcg_opt_gen_movi(s, op2, args2, opc, rh, (uint32_t)(r >> 32));
+
+ /* We've done all we need to do with the movi. Skip it. */
+ oi_next = op2->next;
break;
}
goto do_default;
tmp = do_constant_folding_cond2(&args[0], &args[2], args[4]);
if (tmp != 2) {
if (tmp) {
+ do_brcond_true:
reset_all_temps(nb_temps);
- s->gen_opc_buf[op_index] = INDEX_op_br;
- gen_args[0] = args[5];
- gen_args += 1;
+ op->opc = INDEX_op_br;
+ args[0] = args[5];
} else {
- s->gen_opc_buf[op_index] = INDEX_op_nop;
+ do_brcond_false:
+ tcg_op_remove(s, op);
}
} else if ((args[4] == TCG_COND_LT || args[4] == TCG_COND_GE)
&& temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[3]].val == 0) {
/* Simplify LT/GE comparisons vs zero to a single compare
vs the high word of the input. */
+ do_brcond_high:
reset_all_temps(nb_temps);
- s->gen_opc_buf[op_index] = INDEX_op_brcond_i32;
- gen_args[0] = args[1];
- gen_args[1] = args[3];
- gen_args[2] = args[4];
- gen_args[3] = args[5];
- gen_args += 4;
+ op->opc = INDEX_op_brcond_i32;
+ args[0] = args[1];
+ args[1] = args[3];
+ args[2] = args[4];
+ args[3] = args[5];
+ } else if (args[4] == TCG_COND_EQ) {
+ /* Simplify EQ comparisons where one of the pairs
+ can be simplified. */
+ tmp = do_constant_folding_cond(INDEX_op_brcond_i32,
+ args[0], args[2], TCG_COND_EQ);
+ if (tmp == 0) {
+ goto do_brcond_false;
+ } else if (tmp == 1) {
+ goto do_brcond_high;
+ }
+ tmp = do_constant_folding_cond(INDEX_op_brcond_i32,
+ args[1], args[3], TCG_COND_EQ);
+ if (tmp == 0) {
+ goto do_brcond_false;
+ } else if (tmp != 1) {
+ goto do_default;
+ }
+ do_brcond_low:
+ reset_all_temps(nb_temps);
+ op->opc = INDEX_op_brcond_i32;
+ args[1] = args[2];
+ args[2] = args[4];
+ args[3] = args[5];
+ } else if (args[4] == TCG_COND_NE) {
+ /* Simplify NE comparisons where one of the pairs
+ can be simplified. */
+ tmp = do_constant_folding_cond(INDEX_op_brcond_i32,
+ args[0], args[2], TCG_COND_NE);
+ if (tmp == 0) {
+ goto do_brcond_high;
+ } else if (tmp == 1) {
+ goto do_brcond_true;
+ }
+ tmp = do_constant_folding_cond(INDEX_op_brcond_i32,
+ args[1], args[3], TCG_COND_NE);
+ if (tmp == 0) {
+ goto do_brcond_low;
+ } else if (tmp == 1) {
+ goto do_brcond_true;
+ }
+ goto do_default;
} else {
goto do_default;
}
- args += 6;
break;
case INDEX_op_setcond2_i32:
tmp = do_constant_folding_cond2(&args[1], &args[3], args[5]);
if (tmp != 2) {
- s->gen_opc_buf[op_index] = INDEX_op_movi_i32;
- tcg_opt_gen_movi(gen_args, args[0], tmp);
- gen_args += 2;
+ do_setcond_const:
+ tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
} else if ((args[5] == TCG_COND_LT || args[5] == TCG_COND_GE)
&& temps[args[3]].state == TCG_TEMP_CONST
&& temps[args[4]].state == TCG_TEMP_CONST
&& temps[args[4]].val == 0) {
/* Simplify LT/GE comparisons vs zero to a single compare
vs the high word of the input. */
- s->gen_opc_buf[op_index] = INDEX_op_setcond_i32;
+ do_setcond_high:
+ reset_temp(args[0]);
+ temps[args[0]].mask = 1;
+ op->opc = INDEX_op_setcond_i32;
+ args[1] = args[2];
+ args[2] = args[4];
+ args[3] = args[5];
+ } else if (args[5] == TCG_COND_EQ) {
+ /* Simplify EQ comparisons where one of the pairs
+ can be simplified. */
+ tmp = do_constant_folding_cond(INDEX_op_setcond_i32,
+ args[1], args[3], TCG_COND_EQ);
+ if (tmp == 0) {
+ goto do_setcond_const;
+ } else if (tmp == 1) {
+ goto do_setcond_high;
+ }
+ tmp = do_constant_folding_cond(INDEX_op_setcond_i32,
+ args[2], args[4], TCG_COND_EQ);
+ if (tmp == 0) {
+ goto do_setcond_high;
+ } else if (tmp != 1) {
+ goto do_default;
+ }
+ do_setcond_low:
reset_temp(args[0]);
- gen_args[0] = args[0];
- gen_args[1] = args[2];
- gen_args[2] = args[4];
- gen_args[3] = args[5];
- gen_args += 4;
+ temps[args[0]].mask = 1;
+ op->opc = INDEX_op_setcond_i32;
+ args[2] = args[3];
+ args[3] = args[5];
+ } else if (args[5] == TCG_COND_NE) {
+ /* Simplify NE comparisons where one of the pairs
+ can be simplified. */
+ tmp = do_constant_folding_cond(INDEX_op_setcond_i32,
+ args[1], args[3], TCG_COND_NE);
+ if (tmp == 0) {
+ goto do_setcond_high;
+ } else if (tmp == 1) {
+ goto do_setcond_const;
+ }
+ tmp = do_constant_folding_cond(INDEX_op_setcond_i32,
+ args[2], args[4], TCG_COND_NE);
+ if (tmp == 0) {
+ goto do_setcond_low;
+ } else if (tmp == 1) {
+ goto do_setcond_const;
+ }
+ goto do_default;
} else {
goto do_default;
}
- args += 6;
break;
case INDEX_op_call:
- nb_call_args = (args[0] >> 16) + (args[0] & 0xffff);
- if (!(args[nb_call_args + 1] & (TCG_CALL_NO_READ_GLOBALS |
- TCG_CALL_NO_WRITE_GLOBALS))) {
+ if (!(args[nb_oargs + nb_iargs + 1]
+ & (TCG_CALL_NO_READ_GLOBALS | TCG_CALL_NO_WRITE_GLOBALS))) {
for (i = 0; i < nb_globals; i++) {
reset_temp(i);
}
}
- for (i = 0; i < (args[0] >> 16); i++) {
- reset_temp(args[i + 1]);
- }
- i = nb_call_args + 3;
- while (i) {
- *gen_args = *args;
- args++;
- gen_args++;
- i--;
- }
- break;
+ goto do_reset_output;
default:
do_default:
if (def->flags & TCG_OPF_BB_END) {
reset_all_temps(nb_temps);
} else {
- for (i = 0; i < def->nb_oargs; i++) {
+ do_reset_output:
+ for (i = 0; i < nb_oargs; i++) {
reset_temp(args[i]);
/* Save the corresponding known-zero bits mask for the
first output argument (only one supported so far). */
}
}
}
- for (i = 0; i < def->nb_args; i++) {
- gen_args[i] = args[i];
- }
- args += def->nb_args;
- gen_args += def->nb_args;
break;
}
}
-
- return gen_args;
}
-TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr,
- TCGArg *args, TCGOpDef *tcg_op_defs)
+void tcg_optimize(TCGContext *s)
{
- TCGArg *res;
- res = tcg_constant_folding(s, tcg_opc_ptr, args, tcg_op_defs);
- return res;
+ tcg_constant_folding(s);
}
projects / mirror_qemu.git / blobdiff