void zend_optimizer_update_op1_const(zend_op_array *op_array,
zend_op *opline,
zval *val)
{
if (opline->opcode == ZEND_FREE) {
MAKE_NOP(opline);
zval_dtor(val);
} else {
ZEND_OP1_TYPE(opline) = IS_CONST;
if (Z_TYPE_P(val) == IS_STRING) {
switch (opline->opcode) {
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_CATCH:
case ZEND_FETCH_CONSTANT:
case ZEND_DEFINED:
case ZEND_NEW:
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline)));
Z_CACHE_SLOT(op_array->literals[opline->op1.constant]) = op_array->last_cache_slot++;
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(op_array->literals[opline->op1.constant+1]));
break;
default:
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline)));
break;
}
} else {
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
}
}
}
int zend_optimizer_add_literal(zend_op_array *op_array, zval *zv)
{
int i = op_array->last_literal;
op_array->last_literal++;
op_array->literals = (zval*)erealloc(op_array->literals, op_array->last_literal * sizeof(zval));
ZVAL_COPY_VALUE(&op_array->literals[i], zv);
Z_CACHE_SLOT(op_array->literals[i]) = -1;
return i;
}
int zend_optimizer_add_literal(zend_op_array *op_array, zval *zv)
{
int i = op_array->last_literal;
op_array->last_literal++;
op_array->literals = (zval*)erealloc(op_array->literals, op_array->last_literal * sizeof(zval));
ZVAL_COPY_VALUE(&op_array->literals[i], zv);
Z_CACHE_SLOT(op_array->literals[i]) = -1;
//??? Z_SET_REFCOUNT(op_array->literals[i].constant, 2);
//??? Z_SET_ISREF(op_array->literals[i].constant);
return i;
}
int zend_optimizer_update_op1_const(zend_op_array *op_array,
zend_op *opline,
zval *val)
{
switch (opline->opcode) {
case ZEND_FREE:
MAKE_NOP(opline);
zval_dtor(val);
break;
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_CATCH:
case ZEND_FETCH_CONSTANT:
case ZEND_FETCH_CLASS_CONSTANT:
case ZEND_DEFINED:
case ZEND_NEW:
REQUIRES_STRING(val);
ZEND_OP1_TYPE(opline) = IS_CONST;
drop_leading_backslash(val);
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline)));
Z_CACHE_SLOT(op_array->literals[opline->op1.constant]) = op_array->cache_size;
op_array->cache_size += sizeof(void*);
zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val)));
break;
case ZEND_CONCAT:
case ZEND_FAST_CONCAT:
TO_STRING_NOWARN(val);
/* break missing intentionally */
default:
ZEND_OP1_TYPE(opline) = IS_CONST;
opline->op1.constant = zend_optimizer_add_literal(op_array, val);
if (Z_TYPE_P(val) == IS_STRING) {
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline)));
}
break;
}
return 1;
}
void zend_optimizer_update_op2_const(zend_op_array *op_array,
zend_op *opline,
zval *val)
{
ZEND_OP2_TYPE(opline) = IS_CONST;
if (opline->opcode == ZEND_INIT_FCALL) {
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(ZEND_OP2_LITERAL(opline)));
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += sizeof(void*);
return;
} else if (opline->opcode == ZEND_ROPE_INIT ||
opline->opcode == ZEND_ROPE_ADD ||
opline->opcode == ZEND_ROPE_END ||
opline->opcode == ZEND_CONCAT ||
opline->opcode == ZEND_FAST_CONCAT) {
convert_to_string(val);
}
opline->op2.constant = zend_optimizer_add_literal(op_array, val);
if (Z_TYPE_P(val) == IS_STRING) {
zend_string_hash_val(Z_STR(ZEND_OP2_LITERAL(opline)));
switch (opline->opcode) {
case ZEND_FETCH_CLASS:
case ZEND_INIT_FCALL_BY_NAME:
/*case ZEND_INIT_NS_FCALL_BY_NAME:*/
case ZEND_ADD_INTERFACE:
case ZEND_ADD_TRAIT:
case ZEND_INSTANCEOF:
case ZEND_FETCH_STATIC_PROP_R:
case ZEND_FETCH_STATIC_PROP_W:
case ZEND_FETCH_STATIC_PROP_RW:
case ZEND_FETCH_STATIC_PROP_IS:
case ZEND_FETCH_STATIC_PROP_UNSET:
case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
case ZEND_UNSET_STATIC_PROP:
case ZEND_ISSET_ISEMPTY_STATIC_PROP:
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += sizeof(void*);
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(op_array->literals[opline->op2.constant+1]));
break;
case ZEND_INIT_DYNAMIC_CALL:
opline->opcode = ZEND_INIT_FCALL_BY_NAME;
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += sizeof(void*);
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(op_array->literals[opline->op2.constant+1]));
break;
case ZEND_INIT_METHOD_CALL:
case ZEND_INIT_STATIC_METHOD_CALL:
zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
zend_optimizer_add_literal(op_array, val);
zend_string_hash_val(Z_STR(op_array->literals[opline->op2.constant+1]));
/* break missing intentionally */
/*case ZEND_FETCH_CLASS_CONSTANT:*/
case ZEND_ASSIGN_OBJ:
case ZEND_FETCH_OBJ_R:
case ZEND_FETCH_OBJ_W:
case ZEND_FETCH_OBJ_RW:
case ZEND_FETCH_OBJ_IS:
case ZEND_FETCH_OBJ_UNSET:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_UNSET_OBJ:
case ZEND_PRE_INC_OBJ:
case ZEND_PRE_DEC_OBJ:
case ZEND_POST_INC_OBJ:
case ZEND_POST_DEC_OBJ:
case ZEND_ISSET_ISEMPTY_PROP_OBJ:
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += 2 * sizeof(void*);
break;
case ZEND_ASSIGN_ADD:
case ZEND_ASSIGN_SUB:
case ZEND_ASSIGN_MUL:
case ZEND_ASSIGN_DIV:
case ZEND_ASSIGN_POW:
case ZEND_ASSIGN_MOD:
case ZEND_ASSIGN_SL:
case ZEND_ASSIGN_SR:
case ZEND_ASSIGN_CONCAT:
case ZEND_ASSIGN_BW_OR:
case ZEND_ASSIGN_BW_AND:
case ZEND_ASSIGN_BW_XOR:
if (opline->extended_value == ZEND_ASSIGN_OBJ) {
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += 2 * sizeof(void*);
}
break;
case ZEND_OP_DATA:
if ((opline-1)->opcode == ZEND_ASSIGN_DIM ||
((opline-1)->extended_value == ZEND_ASSIGN_DIM &&
((opline-1)->opcode == ZEND_ASSIGN_ADD ||
(opline-1)->opcode == ZEND_ASSIGN_SUB ||
(opline-1)->opcode == ZEND_ASSIGN_MUL ||
(opline-1)->opcode == ZEND_ASSIGN_DIV ||
(opline-1)->opcode == ZEND_ASSIGN_POW ||
(opline-1)->opcode == ZEND_ASSIGN_MOD ||
(opline-1)->opcode == ZEND_ASSIGN_SL ||
(opline-1)->opcode == ZEND_ASSIGN_SR ||
(opline-1)->opcode == ZEND_ASSIGN_CONCAT ||
(opline-1)->opcode == ZEND_ASSIGN_BW_OR ||
(opline-1)->opcode == ZEND_ASSIGN_BW_AND ||
(opline-1)->opcode == ZEND_ASSIGN_BW_XOR))) {
goto check_numeric;
}
break;
case ZEND_ISSET_ISEMPTY_DIM_OBJ:
case ZEND_ADD_ARRAY_ELEMENT:
case ZEND_INIT_ARRAY:
case ZEND_ASSIGN_DIM:
case ZEND_UNSET_DIM:
case ZEND_FETCH_DIM_R:
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_RW:
case ZEND_FETCH_DIM_IS:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_DIM_UNSET:
case ZEND_FETCH_LIST:
check_numeric:
{
zend_ulong index;
if (ZEND_HANDLE_NUMERIC(Z_STR_P(val), index)) {
zval_dtor(val);
ZVAL_LONG(val, index);
op_array->literals[opline->op2.constant] = *val;
}
}
break;
default:
break;
}
}
}
void zend_optimize_func_calls(zend_op_array *op_array, zend_optimizer_ctx *ctx)
{
zend_op *opline = op_array->opcodes;
zend_op *end = opline + op_array->last;
int call = 0;
void *checkpoint;
optimizer_call_info *call_stack;
if (op_array->last < 2) {
return;
}
checkpoint = zend_arena_checkpoint(ctx->arena);
call_stack = zend_arena_calloc(&ctx->arena, op_array->last / 2, sizeof(optimizer_call_info));
while (opline < end) {
switch (opline->opcode) {
case ZEND_INIT_FCALL_BY_NAME:
case ZEND_INIT_NS_FCALL_BY_NAME:
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_INIT_METHOD_CALL:
case ZEND_INIT_FCALL:
case ZEND_NEW:
call_stack[call].func = zend_optimizer_get_called_func(
ctx->script, op_array, opline, 0);
call_stack[call].try_inline = opline->opcode != ZEND_NEW;
/* break missing intentionally */
case ZEND_INIT_DYNAMIC_CALL:
case ZEND_INIT_USER_CALL:
call_stack[call].opline = opline;
call++;
break;
case ZEND_DO_FCALL:
case ZEND_DO_ICALL:
case ZEND_DO_UCALL:
case ZEND_DO_FCALL_BY_NAME:
call--;
if (call_stack[call].func && call_stack[call].opline) {
zend_op *fcall = call_stack[call].opline;
if (fcall->opcode == ZEND_INIT_FCALL) {
/* nothing to do */
} else if (fcall->opcode == ZEND_INIT_FCALL_BY_NAME) {
fcall->opcode = ZEND_INIT_FCALL;
fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
literal_dtor(&ZEND_OP2_LITERAL(fcall));
fcall->op2.constant = fcall->op2.constant + 1;
opline->opcode = zend_get_call_op(fcall, call_stack[call].func);
} else if (fcall->opcode == ZEND_INIT_NS_FCALL_BY_NAME) {
fcall->opcode = ZEND_INIT_FCALL;
fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
literal_dtor(&op_array->literals[fcall->op2.constant]);
literal_dtor(&op_array->literals[fcall->op2.constant + 2]);
fcall->op2.constant = fcall->op2.constant + 1;
opline->opcode = zend_get_call_op(fcall, call_stack[call].func);
} else if (fcall->opcode == ZEND_INIT_STATIC_METHOD_CALL
|| fcall->opcode == ZEND_INIT_METHOD_CALL
|| fcall->opcode == ZEND_NEW) {
/* We don't have specialized opcodes for this, do nothing */
} else {
ZEND_ASSERT(0);
}
if ((ZEND_OPTIMIZER_PASS_16 & ctx->optimization_level)
&& call_stack[call].try_inline) {
zend_try_inline_call(op_array, fcall, opline, call_stack[call].func);
}
}
call_stack[call].func = NULL;
call_stack[call].opline = NULL;
call_stack[call].try_inline = 0;
break;
case ZEND_FETCH_FUNC_ARG:
case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_FETCH_DIM_FUNC_ARG:
if (call_stack[call - 1].func) {
if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, (opline->extended_value & ZEND_FETCH_ARG_MASK))) {
opline->extended_value &= ZEND_FETCH_TYPE_MASK;
if (opline->opcode != ZEND_FETCH_STATIC_PROP_FUNC_ARG) {
opline->opcode -= 9;
} else {
opline->opcode = ZEND_FETCH_STATIC_PROP_W;
}
} else {
if (opline->opcode == ZEND_FETCH_DIM_FUNC_ARG
&& opline->op2_type == IS_UNUSED) {
/* FETCH_DIM_FUNC_ARG supports UNUSED op2, while FETCH_DIM_R does not.
* Performing the replacement would create an invalid opcode. */
call_stack[call - 1].try_inline = 0;
break;
}
opline->extended_value &= ZEND_FETCH_TYPE_MASK;
if (opline->opcode != ZEND_FETCH_STATIC_PROP_FUNC_ARG) {
opline->opcode -= 12;
} else {
opline->opcode = ZEND_FETCH_STATIC_PROP_R;
}
}
}
break;
case ZEND_SEND_VAL_EX:
if (call_stack[call - 1].func) {
if (ARG_MUST_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
/* We won't convert it into_DO_FCALL to emit error at run-time */
call_stack[call - 1].opline = NULL;
} else {
opline->opcode = ZEND_SEND_VAL;
}
}
break;
case ZEND_SEND_VAR_EX:
if (call_stack[call - 1].func) {
if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
opline->opcode = ZEND_SEND_REF;
} else {
opline->opcode = ZEND_SEND_VAR;
}
}
break;
case ZEND_SEND_VAR_NO_REF_EX:
if (call_stack[call - 1].func) {
if (ARG_MUST_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
opline->opcode = ZEND_SEND_VAR_NO_REF;
} else if (ARG_MAY_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
opline->opcode = ZEND_SEND_VAL;
} else {
opline->opcode = ZEND_SEND_VAR;
}
}
break;
case ZEND_SEND_UNPACK:
case ZEND_SEND_USER:
case ZEND_SEND_ARRAY:
call_stack[call - 1].try_inline = 0;
break;
default:
break;
}
opline++;
}
zend_arena_release(&ctx->arena, checkpoint);
}
void zend_optimizer_compact_literals(zend_op_array *op_array, zend_optimizer_ctx *ctx)
{
zend_op *opline, *end;
int i, j, n, *map, cache_size;
zval zv, *pos;
literal_info *info;
int l_null = -1;
int l_false = -1;
int l_true = -1;
int l_empty_arr = -1;
HashTable hash;
zend_string *key = NULL;
void *checkpoint = zend_arena_checkpoint(ctx->arena);
if (op_array->last_literal) {
cache_size = 0;
info = (literal_info*)zend_arena_calloc(&ctx->arena, op_array->last_literal, sizeof(literal_info));
/* Mark literals of specific types */
opline = op_array->opcodes;
end = opline + op_array->last;
while (opline < end) {
switch (opline->opcode) {
case ZEND_INIT_FCALL:
LITERAL_INFO(opline->op2.constant, LITERAL_FUNC, 1, 1, 1);
break;
case ZEND_INIT_FCALL_BY_NAME:
LITERAL_INFO(opline->op2.constant, LITERAL_FUNC, 1, 1, 2);
break;
case ZEND_INIT_NS_FCALL_BY_NAME:
LITERAL_INFO(opline->op2.constant, LITERAL_FUNC, 1, 1, 3);
break;
case ZEND_INIT_METHOD_CALL:
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
optimizer_literal_obj_info(
info,
opline->op1_type,
opline->op1,
opline->op2.constant,
LITERAL_METHOD, 2, 2,
op_array);
}
break;
case ZEND_INIT_STATIC_METHOD_CALL:
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op1.constant, LITERAL_CLASS, 1, 1, 2);
}
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
optimizer_literal_class_info(
info,
opline->op1_type,
opline->op1,
opline->op2.constant,
LITERAL_STATIC_METHOD, (ZEND_OP1_TYPE(opline) == IS_CONST) ? 1 : 2, 2,
op_array);
}
break;
case ZEND_CATCH:
LITERAL_INFO(opline->op1.constant, LITERAL_CLASS, 1, 1, 2);
break;
case ZEND_DEFINED:
LITERAL_INFO(opline->op1.constant, LITERAL_CONST, 1, 1, 2);
break;
case ZEND_FETCH_CONSTANT:
if ((opline->extended_value & (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) == (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) {
LITERAL_INFO(opline->op2.constant, LITERAL_CONST, 1, 1, 5);
} else {
LITERAL_INFO(opline->op2.constant, LITERAL_CONST, 1, 1, 3);
}
break;
case ZEND_FETCH_CLASS_CONSTANT:
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op1.constant, LITERAL_CLASS, 1, 1, 2);
}
optimizer_literal_class_info(
info,
opline->op1_type,
opline->op1,
opline->op2.constant,
LITERAL_CLASS_CONST, (ZEND_OP1_TYPE(opline) == IS_CONST) ? 1 : 2, 1,
op_array);
break;
case ZEND_FETCH_STATIC_PROP_R:
case ZEND_FETCH_STATIC_PROP_W:
case ZEND_FETCH_STATIC_PROP_RW:
case ZEND_FETCH_STATIC_PROP_IS:
case ZEND_FETCH_STATIC_PROP_UNSET:
case ZEND_FETCH_STATIC_PROP_FUNC_ARG:
case ZEND_UNSET_STATIC_PROP:
case ZEND_ISSET_ISEMPTY_STATIC_PROP:
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op2.constant, LITERAL_CLASS, 1, 1, 2);
}
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
optimizer_literal_class_info(
info,
opline->op2_type,
opline->op2,
opline->op1.constant,
LITERAL_STATIC_PROPERTY, 2, 1,
op_array);
}
break;
case ZEND_FETCH_CLASS:
case ZEND_ADD_INTERFACE:
case ZEND_ADD_TRAIT:
case ZEND_INSTANCEOF:
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op2.constant, LITERAL_CLASS, 1, 1, 2);
}
break;
case ZEND_NEW:
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op1.constant, LITERAL_CLASS, 1, 1, 2);
}
break;
case ZEND_ASSIGN_OBJ:
case ZEND_FETCH_OBJ_R:
case ZEND_FETCH_OBJ_W:
case ZEND_FETCH_OBJ_RW:
case ZEND_FETCH_OBJ_IS:
case ZEND_FETCH_OBJ_UNSET:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_UNSET_OBJ:
case ZEND_PRE_INC_OBJ:
case ZEND_PRE_DEC_OBJ:
case ZEND_POST_INC_OBJ:
case ZEND_POST_DEC_OBJ:
case ZEND_ISSET_ISEMPTY_PROP_OBJ:
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
optimizer_literal_obj_info(
info,
opline->op1_type,
opline->op1,
opline->op2.constant,
LITERAL_PROPERTY, 2, 1,
op_array);
}
break;
case ZEND_ASSIGN_ADD:
case ZEND_ASSIGN_SUB:
case ZEND_ASSIGN_MUL:
case ZEND_ASSIGN_DIV:
case ZEND_ASSIGN_POW:
case ZEND_ASSIGN_MOD:
case ZEND_ASSIGN_SL:
case ZEND_ASSIGN_SR:
case ZEND_ASSIGN_CONCAT:
case ZEND_ASSIGN_BW_OR:
case ZEND_ASSIGN_BW_AND:
case ZEND_ASSIGN_BW_XOR:
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
if (opline->extended_value == ZEND_ASSIGN_OBJ) {
optimizer_literal_obj_info(
info,
opline->op1_type,
opline->op1,
opline->op2.constant,
LITERAL_PROPERTY, 2, 1,
op_array);
} else {
LITERAL_INFO(opline->op2.constant, LITERAL_VALUE, 1, 0, 1);
}
}
break;
case ZEND_BIND_GLOBAL:
LITERAL_INFO(opline->op2.constant, LITERAL_GLOBAL, 0, 1, 1);
break;
case ZEND_RECV_INIT:
LITERAL_INFO(opline->op2.constant, LITERAL_VALUE, 0, 0, 1);
if (Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) != (uint32_t)-1) {
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = cache_size;
cache_size += sizeof(void *);
}
break;
case ZEND_DECLARE_FUNCTION:
case ZEND_DECLARE_CLASS:
case ZEND_DECLARE_INHERITED_CLASS:
case ZEND_DECLARE_INHERITED_CLASS_DELAYED:
LITERAL_INFO(opline->op1.constant, LITERAL_VALUE, 0, 0, 2);
break;
case ZEND_RECV:
case ZEND_RECV_VARIADIC:
case ZEND_VERIFY_RETURN_TYPE:
if (opline->op2.num != (uint32_t)-1) {
opline->op2.num = cache_size;
cache_size += sizeof(void *);
}
default:
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op1.constant, LITERAL_VALUE, 1, 0, 1);
}
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
LITERAL_INFO(opline->op2.constant, LITERAL_VALUE, 1, 0, 1);
}
break;
}
opline++;
}
#if DEBUG_COMPACT_LITERALS
{
int i, use_copy;
fprintf(stderr, "File %s func %s\n", op_array->filename->val,
op_array->function_name ? op_array->function_name->val : "main");
fprintf(stderr, "Literlas table size %d\n", op_array->last_literal);
for (i = 0; i < op_array->last_literal; i++) {
zval zv;
ZVAL_COPY_VALUE(&zv, op_array->literals + i);
use_copy = zend_make_printable_zval(op_array->literals + i, &zv);
fprintf(stderr, "Literal %d, val (%d):%s\n", i, Z_STRLEN(zv), Z_STRVAL(zv));
if (use_copy) {
zval_dtor(&zv);
}
}
fflush(stderr);
}
#endif
/* Merge equal constants */
j = 0;
zend_hash_init(&hash, op_array->last_literal, NULL, NULL, 0);
map = (int*)zend_arena_alloc(&ctx->arena, op_array->last_literal * sizeof(int));
memset(map, 0, op_array->last_literal * sizeof(int));
for (i = 0; i < op_array->last_literal; i++) {
if (!info[i].flags) {
/* unsed literal */
zval_dtor(&op_array->literals[i]);
continue;
}
switch (Z_TYPE(op_array->literals[i])) {
case IS_NULL:
/* Only checking MAY_MERGE for IS_NULL here
* is because only IS_NULL can be default value for class type hinting(RECV_INIT). */
if ((info[i].flags & LITERAL_MAY_MERGE)) {
if (l_null < 0) {
l_null = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
map[i] = l_null;
} else {
map[i] = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
break;
case IS_FALSE:
if (l_false < 0) {
l_false = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
map[i] = l_false;
break;
case IS_TRUE:
if (l_true < 0) {
l_true = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
map[i] = l_true;
break;
case IS_LONG:
if ((pos = zend_hash_index_find(&hash, Z_LVAL(op_array->literals[i]))) != NULL) {
map[i] = Z_LVAL_P(pos);
} else {
map[i] = j;
ZVAL_LONG(&zv, j);
zend_hash_index_add_new(&hash, Z_LVAL(op_array->literals[i]), &zv);
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
break;
case IS_DOUBLE:
if ((pos = zend_hash_str_find(&hash, (char*)&Z_DVAL(op_array->literals[i]), sizeof(double))) != NULL) {
map[i] = Z_LVAL_P(pos);
} else {
map[i] = j;
ZVAL_LONG(&zv, j);
zend_hash_str_add(&hash, (char*)&Z_DVAL(op_array->literals[i]), sizeof(double), &zv);
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
}
break;
case IS_STRING:
case IS_CONSTANT:
if (info[i].flags & LITERAL_MAY_MERGE) {
if (info[i].flags & LITERAL_EX_OBJ) {
int key_len = sizeof("$this->") - 1 + Z_STRLEN(op_array->literals[i]);
key = zend_string_alloc(key_len, 0);
memcpy(ZSTR_VAL(key), "$this->", sizeof("$this->") - 1);
memcpy(ZSTR_VAL(key) + sizeof("$this->") - 1, Z_STRVAL(op_array->literals[i]), Z_STRLEN(op_array->literals[i]) + 1);
ZSTR_LEN(key) = key_len;
} else if (info[i].flags & LITERAL_EX_CLASS) {
int key_len;
zval *class_name = &op_array->literals[(info[i].u.num < i) ? map[info[i].u.num] : info[i].u.num];
key_len = Z_STRLEN_P(class_name) + sizeof("::") - 1 + Z_STRLEN(op_array->literals[i]);
key = zend_string_alloc(key_len, 0);
memcpy(ZSTR_VAL(key), Z_STRVAL_P(class_name), Z_STRLEN_P(class_name));
memcpy(ZSTR_VAL(key) + Z_STRLEN_P(class_name), "::", sizeof("::") - 1);
memcpy(ZSTR_VAL(key) + Z_STRLEN_P(class_name) + sizeof("::") - 1,
Z_STRVAL(op_array->literals[i]),
Z_STRLEN(op_array->literals[i]) + 1);
} else {
key = zend_string_init(Z_STRVAL(op_array->literals[i]), Z_STRLEN(op_array->literals[i]), 0);
}
ZSTR_H(key) = zend_hash_func(ZSTR_VAL(key), ZSTR_LEN(key));
ZSTR_H(key) += info[i].flags;
}
if ((info[i].flags & LITERAL_MAY_MERGE) &&
(pos = zend_hash_find(&hash, key)) != NULL &&
Z_TYPE(op_array->literals[i]) == Z_TYPE(op_array->literals[Z_LVAL_P(pos)]) &&
info[i].flags == info[Z_LVAL_P(pos)].flags) {
zend_string_release(key);
map[i] = Z_LVAL_P(pos);
zval_dtor(&op_array->literals[i]);
n = LITERAL_NUM_RELATED(info[i].flags);
while (n > 1) {
i++;
zval_dtor(&op_array->literals[i]);
n--;
}
} else {
map[i] = j;
if (info[i].flags & LITERAL_MAY_MERGE) {
ZVAL_LONG(&zv, j);
zend_hash_add_new(&hash, key, &zv);
zend_string_release(key);
}
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
if (LITERAL_NUM_SLOTS(info[i].flags)) {
Z_CACHE_SLOT(op_array->literals[j]) = cache_size;
cache_size += LITERAL_NUM_SLOTS(info[i].flags) * sizeof(void*);
}
j++;
n = LITERAL_NUM_RELATED(info[i].flags);
while (n > 1) {
i++;
if (i != j) op_array->literals[j] = op_array->literals[i];
j++;
n--;
}
}
break;
case IS_ARRAY:
if (zend_hash_num_elements(Z_ARRVAL(op_array->literals[i])) == 0) {
if (l_empty_arr < 0) {
l_empty_arr = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
} else {
zval_dtor(&op_array->literals[i]);
}
map[i] = l_empty_arr;
break;
}
/* break missing intentionally */
default:
/* don't merge other types */
map[i] = j;
if (i != j) {
op_array->literals[j] = op_array->literals[i];
info[j] = info[i];
}
j++;
break;
}
}
zend_hash_destroy(&hash);
op_array->last_literal = j;
op_array->cache_size = cache_size;
/* Update opcodes to use new literals table */
opline = op_array->opcodes;
end = opline + op_array->last;
while (opline < end) {
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
opline->op1.constant = map[opline->op1.constant];
}
if (ZEND_OP2_TYPE(opline) == IS_CONST) {
opline->op2.constant = map[opline->op2.constant];
}
opline++;
}
zend_arena_release(&ctx->arena, checkpoint);
#if DEBUG_COMPACT_LITERALS
{
int i, use_copy;
fprintf(stderr, "Optimized literlas table size %d\n", op_array->last_literal);
for (i = 0; i < op_array->last_literal; i++) {
zval zv;
ZVAL_COPY_VALUE(&zv, op_array->literals + i);
use_copy = zend_make_printable_zval(op_array->literals + i, &zv);
fprintf(stderr, "Literal %d, val (%d):%s\n", i, Z_STRLEN(zv), Z_STRVAL(zv));
if (use_copy) {
zval_dtor(&zv);
}
}
fflush(stderr);
}
#endif
}
}
void optimize_func_calls(zend_op_array *op_array, zend_optimizer_ctx *ctx)
{
zend_op *opline = op_array->opcodes;
zend_op *end = opline + op_array->last;
int call = 0;
void *checkpoint;
optimizer_call_info *call_stack;
if (op_array->last < 2) {
return;
}
checkpoint = zend_arena_checkpoint(ctx->arena);
call_stack = zend_arena_calloc(&ctx->arena, op_array->last / 2, sizeof(optimizer_call_info));
while (opline < end) {
switch (opline->opcode) {
case ZEND_INIT_FCALL_BY_NAME:
case ZEND_INIT_NS_FCALL_BY_NAME:
if (ZEND_OP2_IS_CONST_STRING(opline)) {
zend_function *func;
zval *function_name = &op_array->literals[opline->op2.constant + 1];
if ((func = zend_hash_find_ptr(&ctx->script->function_table,
Z_STR_P(function_name))) != NULL) {
call_stack[call].func = func;
}
}
/* break missing intentionally */
case ZEND_NEW:
case ZEND_INIT_METHOD_CALL:
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_INIT_FCALL:
case ZEND_INIT_USER_CALL:
call_stack[call].opline = opline;
call++;
break;
case ZEND_DO_FCALL:
call--;
if (call_stack[call].func && call_stack[call].opline) {
zend_op *fcall = call_stack[call].opline;
if (fcall->opcode == ZEND_INIT_FCALL_BY_NAME) {
fcall->opcode = ZEND_INIT_FCALL;
fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
literal_dtor(&ZEND_OP2_LITERAL(fcall));
fcall->op2.constant = fcall->op2.constant + 1;
} else if (fcall->opcode == ZEND_INIT_NS_FCALL_BY_NAME) {
fcall->opcode = ZEND_INIT_FCALL;
fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
literal_dtor(&op_array->literals[fcall->op2.constant]);
literal_dtor(&op_array->literals[fcall->op2.constant + 2]);
fcall->op2.constant = fcall->op2.constant + 1;
} else {
ZEND_ASSERT(0);
}
}
call_stack[call].func = NULL;
call_stack[call].opline = NULL;
break;
case ZEND_FETCH_FUNC_ARG:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_FETCH_DIM_FUNC_ARG:
if (call_stack[call - 1].func) {
if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, (opline->extended_value & ZEND_FETCH_ARG_MASK))) {
opline->extended_value = 0;
opline->opcode -= 9;
} else {
opline->extended_value = 0;
opline->opcode -= 12;
}
}
break;
case ZEND_SEND_VAL_EX:
if (call_stack[call - 1].func) {
if (ARG_MUST_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
/* We won't convert it into_DO_FCALL to emit error at run-time */
call_stack[call - 1].opline = NULL;
} else {
opline->opcode = ZEND_SEND_VAL;
}
}
break;
case ZEND_SEND_VAR_EX:
if (call_stack[call - 1].func) {
if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
opline->opcode = ZEND_SEND_REF;
} else {
opline->opcode = ZEND_SEND_VAR;
}
}
break;
case ZEND_SEND_VAR_NO_REF:
if (!(opline->extended_value & ZEND_ARG_COMPILE_TIME_BOUND) && call_stack[call - 1].func) {
if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
opline->extended_value |= ZEND_ARG_COMPILE_TIME_BOUND | ZEND_ARG_SEND_BY_REF;
} else {
opline->opcode = ZEND_SEND_VAR;
opline->extended_value = 0;
}
}
break;
#if 0
case ZEND_SEND_REF:
if (opline->extended_value != ZEND_ARG_COMPILE_TIME_BOUND && call_stack[call - 1].func) {
/* We won't handle run-time pass by reference */
call_stack[call - 1].opline = NULL;
}
break;
#endif
case ZEND_SEND_UNPACK:
call_stack[call - 1].func = NULL;
call_stack[call - 1].opline = NULL;
break;
default:
break;
}
opline++;
}
zend_arena_release(&ctx->arena, checkpoint);
}
static inline void alloc_cache_slots_op2(zend_op_array *op_array, zend_op *opline, uint32_t num) {
Z_CACHE_SLOT(op_array->literals[opline->op2.constant]) = op_array->cache_size;
op_array->cache_size += num * sizeof(void *);
}