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Diffstat (limited to 'tcg/optimize.c')
-rw-r--r--tcg/optimize.c149
1 files changed, 59 insertions, 90 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 585f1ed7bb..0f6f7008da 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -193,10 +193,42 @@ static bool temps_are_copies(TCGArg arg1, TCGArg arg2)
return false;
}
+static void tcg_opt_gen_movi(TCGContext *s, TCGOp *op, TCGArg *args,
+ TCGArg dst, TCGArg val)
+{
+ TCGOpcode new_op = op_to_movi(op->opc);
+ tcg_target_ulong mask;
+
+ op->opc = new_op;
+
+ reset_temp(dst);
+ temps[dst].state = TCG_TEMP_CONST;
+ temps[dst].val = val;
+ 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 void tcg_opt_gen_mov(TCGContext *s, TCGOp *op, TCGArg *args,
- TCGOpcode old_op, TCGArg dst, TCGArg src)
+ TCGArg dst, TCGArg src)
{
- TCGOpcode new_op = op_to_mov(old_op);
+ if (temps_are_copies(dst, src)) {
+ tcg_op_remove(s, op);
+ return;
+ }
+
+ if (temps[src].state == TCG_TEMP_CONST) {
+ tcg_opt_gen_movi(s, op, args, dst, temps[src].val);
+ return;
+ }
+
+ TCGOpcode new_op = op_to_mov(op->opc);
tcg_target_ulong mask;
op->opc = new_op;
@@ -228,28 +260,6 @@ static void tcg_opt_gen_mov(TCGContext *s, TCGOp *op, TCGArg *args,
args[1] = src;
}
-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;
- 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)
{
uint64_t l64, h64;
@@ -564,7 +574,7 @@ static bool swap_commutative2(TCGArg *p1, TCGArg *p2)
}
/* Propagate constants and copies, fold constant expressions. */
-static void tcg_constant_folding(TCGContext *s)
+void tcg_optimize(TCGContext *s)
{
int oi, oi_next, nb_temps, nb_globals;
@@ -670,7 +680,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(rotr):
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[1]].val == 0) {
- tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
+ tcg_opt_gen_movi(s, op, args, args[0], 0);
continue;
}
break;
@@ -775,7 +785,8 @@ static void tcg_constant_folding(TCGContext *s)
if (temps[args[1]].state != TCG_TEMP_CONST
&& temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[2]].val == 0) {
- goto do_mov3;
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
+ continue;
}
break;
CASE_OP_32_64(and):
@@ -784,16 +795,10 @@ static void tcg_constant_folding(TCGContext *s)
if (temps[args[1]].state != TCG_TEMP_CONST
&& temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[2]].val == -1) {
- goto do_mov3;
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
+ continue;
}
break;
- do_mov3:
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- } else {
- tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
- }
- continue;
default:
break;
}
@@ -942,19 +947,12 @@ static void tcg_constant_folding(TCGContext *s)
if (partmask == 0) {
assert(nb_oargs == 1);
- tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
+ tcg_opt_gen_movi(s, op, args, args[0], 0);
continue;
}
if (affected == 0) {
assert(nb_oargs == 1);
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- } else if (temps[args[1]].state != TCG_TEMP_CONST) {
- tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
- } else {
- tcg_opt_gen_movi(s, op, args, opc,
- args[0], temps[args[1]].val);
- }
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
continue;
}
@@ -966,7 +964,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(mulsh):
if ((temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[2]].val == 0)) {
- tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
+ tcg_opt_gen_movi(s, op, args, args[0], 0);
continue;
}
break;
@@ -979,14 +977,7 @@ static void tcg_constant_folding(TCGContext *s)
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])) {
- tcg_op_remove(s, op);
- } else if (temps[args[1]].state != TCG_TEMP_CONST) {
- tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
- } else {
- tcg_opt_gen_movi(s, op, args, opc,
- args[0], temps[args[1]].val);
- }
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
continue;
}
break;
@@ -1000,7 +991,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(sub):
CASE_OP_32_64(xor):
if (temps_are_copies(args[1], args[2])) {
- tcg_opt_gen_movi(s, op, args, opc, args[0], 0);
+ tcg_opt_gen_movi(s, op, args, args[0], 0);
continue;
}
break;
@@ -1013,20 +1004,10 @@ static void tcg_constant_folding(TCGContext *s)
allocator where needed and possible. Also detect copies. */
switch (opc) {
CASE_OP_32_64(mov):
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- break;
- }
- if (temps[args[1]].state != TCG_TEMP_CONST) {
- 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. */
- args[1] = temps[args[1]].val;
- /* fallthrough */
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
+ break;
CASE_OP_32_64(movi):
- tcg_opt_gen_movi(s, op, args, opc, args[0], args[1]);
+ tcg_opt_gen_movi(s, op, args, args[0], args[1]);
break;
CASE_OP_32_64(not):
@@ -1039,7 +1020,7 @@ static void tcg_constant_folding(TCGContext *s)
case INDEX_op_ext32u_i64:
if (temps[args[1]].state == TCG_TEMP_CONST) {
tmp = do_constant_folding(opc, temps[args[1]].val, 0);
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, args[0], tmp);
break;
}
goto do_default;
@@ -1047,7 +1028,7 @@ static void tcg_constant_folding(TCGContext *s)
case INDEX_op_trunc_shr_i32:
if (temps[args[1]].state == TCG_TEMP_CONST) {
tmp = do_constant_folding(opc, temps[args[1]].val, args[2]);
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, args[0], tmp);
break;
}
goto do_default;
@@ -1078,7 +1059,7 @@ static void tcg_constant_folding(TCGContext *s)
&& temps[args[2]].state == TCG_TEMP_CONST) {
tmp = do_constant_folding(opc, temps[args[1]].val,
temps[args[2]].val);
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, args[0], tmp);
break;
}
goto do_default;
@@ -1088,7 +1069,7 @@ static void tcg_constant_folding(TCGContext *s)
&& temps[args[2]].state == TCG_TEMP_CONST) {
tmp = deposit64(temps[args[1]].val, args[3], args[4],
temps[args[2]].val);
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, args[0], tmp);
break;
}
goto do_default;
@@ -1096,7 +1077,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(setcond):
tmp = do_constant_folding_cond(opc, args[1], args[2], args[3]);
if (tmp != 2) {
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, args[0], tmp);
break;
}
goto do_default;
@@ -1118,14 +1099,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(movcond):
tmp = do_constant_folding_cond(opc, args[1], args[2], args[5]);
if (tmp != 2) {
- if (temps_are_copies(args[0], args[4-tmp])) {
- tcg_op_remove(s, op);
- } else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
- tcg_opt_gen_movi(s, op, args, opc,
- args[0], temps[args[4-tmp]].val);
- } else {
- tcg_opt_gen_mov(s, op, args, opc, args[0], args[4-tmp]);
- }
+ tcg_opt_gen_mov(s, op, args, args[0], args[4-tmp]);
break;
}
goto do_default;
@@ -1154,8 +1128,8 @@ static void tcg_constant_folding(TCGContext *s)
rl = args[0];
rh = args[1];
- 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));
+ tcg_opt_gen_movi(s, op, args, rl, (uint32_t)a);
+ tcg_opt_gen_movi(s, op2, args2, rh, (uint32_t)(a >> 32));
/* We've done all we need to do with the movi. Skip it. */
oi_next = op2->next;
@@ -1175,8 +1149,8 @@ static void tcg_constant_folding(TCGContext *s)
rl = args[0];
rh = args[1];
- 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));
+ tcg_opt_gen_movi(s, op, args, rl, (uint32_t)r);
+ tcg_opt_gen_movi(s, op2, args2, rh, (uint32_t)(r >> 32));
/* We've done all we need to do with the movi. Skip it. */
oi_next = op2->next;
@@ -1260,7 +1234,7 @@ static void tcg_constant_folding(TCGContext *s)
tmp = do_constant_folding_cond2(&args[1], &args[3], args[5]);
if (tmp != 2) {
do_setcond_const:
- tcg_opt_gen_movi(s, op, args, opc, args[0], tmp);
+ tcg_opt_gen_movi(s, op, args, 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
@@ -1354,8 +1328,3 @@ static void tcg_constant_folding(TCGContext *s)
}
}
}
-
-void tcg_optimize(TCGContext *s)
-{
- tcg_constant_folding(s);
-}
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-19 15:23:05 +0000