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php-src/ext/opcache/Optimizer/pass1_5.c
Dmitry Stogov b11a30f5ea Merge branch 'master' into phpng 
* master:
  Support for __debugInfo (Joe Watkins)
  Optimize ZEND_POW (Rouven Weßling)
  gcov: tentative fix for broken coverage data after fix for opcache coverage slightly hackish, but works. The idea is that we want to give priority to .gcda files in .libs dirs vs the files in the upper level dir
  gcov: tentative fix for broken coverage data after fix for opcache coverage slightly hackish, but works. The idea is that we want to give priority to .gcda files in .libs dirs vs the files in the upper level dir
  Prevent recursion in ZF2 Parameters class
  adding NEWS block for beta4
  5.4.30 next
  enable email notifications
  update NEWS
  update NEWS
  update NEWS
  - Updated to version 2014.3 (2014c)
  fix bug #67253: timelib_meridian_with_check out-of-bounds read
  Fix bug #67252: convert_uudecode out-of-bounds read
  Fix bug #67251 - date_parse_from_format out-of-bounds read
  Fix bug #67250 (iptcparse out-of-bounds read)

Conflicts:
	ext/opcache/zend_persist.c
	ext/spl/spl_array.c
2014-05-18 21:17:31 +04:00

566 lines
18 KiB
C
Raw Blame History

/* pass 1
* - substitute persistent constants (true, false, null, etc)
* - perform compile-time evaluation of constant binary and unary operations
* - optimize series of ADD_STRING and/or ADD_CHAR
* - convert CAST(IS_BOOL,x) into BOOL(x)
* - pre-evaluate constant function calls
*/
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
# define ZEND_IS_CONSTANT_TYPE(t) ((t) == IS_CONSTANT)
#else
# define ZEND_IS_CONSTANT_TYPE(t) ((t) == IS_CONSTANT)
#endif
if (ZEND_OPTIMIZER_PASS_1 & OPTIMIZATION_LEVEL) {
int i = 0;
zend_op *opline = op_array->opcodes;
zend_op *end = opline + op_array->last;
zend_bool collect_constants = (op_array == &script->main_op_array);
while (opline < end) {
switch (opline->opcode) {
case ZEND_ADD:
case ZEND_SUB:
case ZEND_MUL:
case ZEND_DIV:
case ZEND_MOD:
#if ZEND_EXTENSION_API_NO >= PHP_5_6_X_API_NO
case ZEND_POW:
#endif
case ZEND_SL:
case ZEND_SR:
case ZEND_CONCAT:
case ZEND_IS_EQUAL:
case ZEND_IS_NOT_EQUAL:
case ZEND_IS_SMALLER:
case ZEND_IS_SMALLER_OR_EQUAL:
case ZEND_IS_IDENTICAL:
case ZEND_IS_NOT_IDENTICAL:
case ZEND_BW_OR:
case ZEND_BW_AND:
case ZEND_BW_XOR:
case ZEND_BOOL_XOR:
if (ZEND_OP1_TYPE(opline) == IS_CONST &&
ZEND_OP2_TYPE(opline) == IS_CONST) {
/* binary operation with constant operands */
int (*binary_op)(zval *result, zval *op1, zval *op2 TSRMLS_DC) = get_binary_op(opline->opcode);
zend_uint tv = ZEND_RESULT(opline).var; /* temporary variable */
zval result;
int er;
if (opline->opcode == ZEND_DIV &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_LONG &&
Z_LVAL(ZEND_OP2_LITERAL(opline)) == 0) {
/* div by 0 */
break;
}
er = EG(error_reporting);
EG(error_reporting) = 0;
/* evaluate constant expression */
if (binary_op(&result, &ZEND_OP1_LITERAL(opline), &ZEND_OP2_LITERAL(opline) TSRMLS_CC) != SUCCESS) {
EG(error_reporting) = er;
break;
}
EG(error_reporting) = er;
literal_dtor(&ZEND_OP1_LITERAL(opline));
literal_dtor(&ZEND_OP2_LITERAL(opline));
MAKE_NOP(opline);
replace_tmp_by_const(op_array, opline + 1, tv, &result TSRMLS_CC);
}
break;
case ZEND_CAST:
if (ZEND_OP1_TYPE(opline) == IS_CONST &&
opline->extended_value != IS_ARRAY &&
opline->extended_value != IS_OBJECT &&
opline->extended_value != IS_RESOURCE) {
/* cast of constant operand */
zend_uint tv = ZEND_RESULT(opline).var; /* temporary variable */
zval res;
res = ZEND_OP1_LITERAL(opline);
zval_copy_ctor(&res);
switch (opline->extended_value) {
case IS_NULL:
convert_to_null(&res);
break;
case _IS_BOOL:
convert_to_boolean(&res);
break;
case IS_LONG:
convert_to_long(&res);
break;
case IS_DOUBLE:
convert_to_double(&res);
break;
case IS_STRING:
convert_to_string(&res);
break;
}
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
if (opline->result_type == IS_TMP_VAR) {
replace_tmp_by_const(op_array, opline + 1, tv, &res TSRMLS_CC);
} else /* if (opline->result_type == IS_VAR) */ {
replace_var_by_const(op_array, opline + 1, tv, &res TSRMLS_CC);
}
} else if (opline->extended_value == _IS_BOOL) {
/* T = CAST(X, IS_BOOL) => T = BOOL(X) */
opline->opcode = ZEND_BOOL;
opline->extended_value = 0;
}
break;
case ZEND_BW_NOT:
case ZEND_BOOL_NOT:
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
/* unary operation on constant operand */
unary_op_type unary_op = get_unary_op(opline->opcode);
zval result;
zend_uint tv = ZEND_RESULT(opline).var; /* temporary variable */
int er;
er = EG(error_reporting);
EG(error_reporting) = 0;
#if ZEND_EXTENSION_API_NO < PHP_5_3_X_API_NO
if (unary_op(&result, &ZEND_OP1_LITERAL(opline)) != SUCCESS) {
#else
if (unary_op(&result, &ZEND_OP1_LITERAL(opline) TSRMLS_CC) != SUCCESS) {
#endif
EG(error_reporting) = er;
break;
}
EG(error_reporting) = er;
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
replace_tmp_by_const(op_array, opline + 1, tv, &result TSRMLS_CC);
}
break;
case ZEND_ADD_STRING:
case ZEND_ADD_CHAR:
{
zend_op *next_op = opline + 1;
int requires_conversion = (opline->opcode == ZEND_ADD_CHAR? 1 : 0);
size_t final_length = 0;
zend_string *str;
char *ptr;
zend_op *last_op;
/* There is always a ZEND_RETURN at the end
if (next_op>=end) {
break;
}
*/
while (next_op->opcode == ZEND_ADD_STRING || next_op->opcode == ZEND_ADD_CHAR) {
if (ZEND_RESULT(opline).var != ZEND_RESULT(next_op).var) {
break;
}
if (next_op->opcode == ZEND_ADD_CHAR) {
final_length += 1;
} else { /* ZEND_ADD_STRING */
final_length += Z_STRLEN(ZEND_OP2_LITERAL(next_op));
}
next_op++;
}
if (final_length == 0) {
break;
}
last_op = next_op;
final_length += (requires_conversion? 1 : Z_STRLEN(ZEND_OP2_LITERAL(opline)));
str = STR_ALLOC(final_length, 0);
ptr = str->val;
ptr[final_length] = '\0';
if (requires_conversion) { /* ZEND_ADD_CHAR */
char chval = (char)Z_LVAL(ZEND_OP2_LITERAL(opline));
ZVAL_NEW_STR(&ZEND_OP2_LITERAL(opline), str);
ptr[0] = chval;
opline->opcode = ZEND_ADD_STRING;
ptr++;
} else { /* ZEND_ADD_STRING */
memcpy(ptr, Z_STRVAL(ZEND_OP2_LITERAL(opline)), Z_STRLEN(ZEND_OP2_LITERAL(opline)));
STR_RELEASE(Z_STR(ZEND_OP2_LITERAL(opline)));
Z_STR(ZEND_OP2_LITERAL(opline)) = str;
ptr += Z_STRLEN(ZEND_OP2_LITERAL(opline));
}
Z_STRLEN(ZEND_OP2_LITERAL(opline)) = final_length;
next_op = opline + 1;
while (next_op < last_op) {
if (next_op->opcode == ZEND_ADD_STRING) {
memcpy(ptr, Z_STRVAL(ZEND_OP2_LITERAL(next_op)), Z_STRLEN(ZEND_OP2_LITERAL(next_op)));
ptr += Z_STRLEN(ZEND_OP2_LITERAL(next_op));
literal_dtor(&ZEND_OP2_LITERAL(next_op));
} else { /* ZEND_ADD_CHAR */
*ptr = (char)Z_LVAL(ZEND_OP2_LITERAL(next_op));
ptr++;
}
MAKE_NOP(next_op);
next_op++;
}
if (!((ZEND_OPTIMIZER_PASS_5|ZEND_OPTIMIZER_PASS_10) & OPTIMIZATION_LEVEL)) {
/* NOP removal is disabled => insert JMP over NOPs */
if (last_op-opline >= 3) { /* If we have more than 2 NOPS then JMP over them */
(opline + 1)->opcode = ZEND_JMP;
ZEND_OP1(opline + 1).opline_num = last_op - op_array->opcodes; /* that's OK even for ZE2, since opline_num's are resolved in pass 2 later */
}
}
}
break;
case ZEND_FETCH_CONSTANT:
if (ZEND_OP1_TYPE(opline) == IS_UNUSED &&
ZEND_OP2_TYPE(opline) == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING &&
Z_STRLEN(ZEND_OP2_LITERAL(opline)) == sizeof("__COMPILER_HALT_OFFSET__") - 1 &&
memcmp(Z_STRVAL(ZEND_OP2_LITERAL(opline)), "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1) == 0) {
/* substitute __COMPILER_HALT_OFFSET__ constant */
zend_bool orig_in_execution = EG(in_execution);
zend_op_array *orig_op_array = EG(active_op_array);
zval *offset;
EG(in_execution) = 1;
EG(active_op_array) = op_array;
if ((offset = zend_get_constant_str("__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1 TSRMLS_CC)) != NULL) {
zend_uint tv = ZEND_RESULT(opline).var;
literal_dtor(&ZEND_OP2_LITERAL(opline));
MAKE_NOP(opline);
replace_tmp_by_const(op_array, opline, tv, offset TSRMLS_CC);
}
EG(active_op_array) = orig_op_array;
EG(in_execution) = orig_in_execution;
break;
}
if (ZEND_OP1_TYPE(opline) == IS_UNUSED &&
ZEND_OP2_TYPE(opline) == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
/* substitute persistent constants */
zend_uint tv = ZEND_RESULT(opline).var;
zval c;
if (!zend_get_persistent_constant(Z_STR(ZEND_OP2_LITERAL(opline)), &c, 1 TSRMLS_CC)) {
if (!*constants || !zend_optimizer_get_collected_constant(*constants, &ZEND_OP2_LITERAL(opline), &c)) {
break;
}
}
literal_dtor(&ZEND_OP2_LITERAL(opline));
MAKE_NOP(opline);
replace_tmp_by_const(op_array, opline, tv, &c TSRMLS_CC);
}
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
/* class constant */
if (ZEND_OP1_TYPE(opline) != IS_UNUSED &&
ZEND_OP2_TYPE(opline) == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
zend_class_entry *ce = NULL;
if (ZEND_OP1_TYPE(opline) == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING) {
/* for A::B */
if (op_array->scope &&
!strncasecmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
op_array->scope->name->val, Z_STRLEN(ZEND_OP1_LITERAL(opline)) + 1)) {
ce = op_array->scope;
} else {
if ((ce = zend_hash_find_ptr(EG(class_table),
Z_STR(op_array->literals[opline->op1.constant + 1]))) == NULL ||
(ce->type == ZEND_INTERNAL_CLASS &&
ce->info.internal.module->type != MODULE_PERSISTENT) ||
(ce->type == ZEND_USER_CLASS &&
ZEND_CE_FILENAME(ce) != op_array->filename)) {
break;
}
}
} else if (op_array->scope &&
ZEND_OP1_TYPE(opline) == IS_VAR &&
(opline - 1)->opcode == ZEND_FETCH_CLASS &&
(ZEND_OP1_TYPE(opline - 1) == IS_UNUSED &&
((opline - 1)->extended_value & ~ZEND_FETCH_CLASS_NO_AUTOLOAD) == ZEND_FETCH_CLASS_SELF) &&
ZEND_RESULT((opline - 1)).var == ZEND_OP1(opline).var) {
/* for self::B */
ce = op_array->scope;
}
if (ce) {
zend_uint tv = ZEND_RESULT(opline).var;
zval *c, t;
if ((c = zend_hash_find(&ce->constants_table,
Z_STR(ZEND_OP2_LITERAL(opline)))) != NULL) {
ZVAL_DEREF(c);
if (ZEND_IS_CONSTANT_TYPE(Z_TYPE_P(c))) {
if (!zend_get_persistent_constant(Z_STR_P(c), &t, 1 TSRMLS_CC) ||
ZEND_IS_CONSTANT_TYPE(Z_TYPE(t))) {
break;
}
} else {
ZVAL_COPY_VALUE(&t, c);
zval_copy_ctor(&t);
}
if (ZEND_OP1_TYPE(opline) == IS_CONST) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
} else {
MAKE_NOP((opline - 1));
}
literal_dtor(&ZEND_OP2_LITERAL(opline));
MAKE_NOP(opline);
replace_tmp_by_const(op_array, opline, tv, &t TSRMLS_CC);
}
}
}
#endif
break;
case ZEND_DO_FCALL:
/* define("name", scalar); */
if (collect_constants &&
opline->extended_value == 2 &&
ZEND_OP1_TYPE(opline) == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING &&
Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("define")-1 &&
zend_binary_strcasecmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)), Z_STRLEN(ZEND_OP1_LITERAL(opline)), "define", sizeof("define")-1) == 0 &&
(opline-1)->opcode == ZEND_SEND_VAL &&
ZEND_OP1_TYPE(opline-1) == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline-1)) <= IS_STRING &&
(opline-2)->opcode == ZEND_SEND_VAL &&
ZEND_OP1_TYPE(opline-2) == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline-2)) == IS_STRING) {
zend_optimizer_collect_constant(constants, &ZEND_OP1_LITERAL(opline-2), &ZEND_OP1_LITERAL(opline-1));
break;
} else {
/* don't colllect constants after any other function call */
collect_constants = 0;
}
/* pre-evaluate constant functions:
defined(x)
constant(x)
function_exists(x)
is_callable(x)
extension_loaded(x)
*/
if (opline->extended_value == 1 && (opline - 1)->opcode == ZEND_SEND_VAL &&
ZEND_OP1_TYPE(opline - 1) == IS_CONST && Z_TYPE(ZEND_OP1_LITERAL(opline - 1)) == IS_STRING &&
ZEND_OP1_TYPE(opline) == IS_CONST && Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING) {
if ((Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("function_exists")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"function_exists", sizeof("function_exists")-1)) ||
(Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("is_callable")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"is_callable", sizeof("is_callable")))) {
zend_internal_function *func;
char *lc_name = zend_str_tolower_dup(
Z_STRVAL(ZEND_OP1_LITERAL(opline - 1)), Z_STRLEN(ZEND_OP1_LITERAL(opline - 1)));
if ((func = zend_hash_str_find_ptr(EG(function_table), lc_name, Z_STRLEN(ZEND_OP1_LITERAL(opline - 1)))) != NULL &&
func->type == ZEND_INTERNAL_FUNCTION &&
func->module->type == MODULE_PERSISTENT) {
zval t;
ZVAL_BOOL(&t, 1);
if (replace_var_by_const(op_array, opline + 1, ZEND_RESULT(opline).var, &t TSRMLS_CC)) {
literal_dtor(&ZEND_OP1_LITERAL(opline - 1));
MAKE_NOP((opline - 1));
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
}
efree(lc_name);
} else if (Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("extension_loaded")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"extension_loaded", sizeof("extension_loaded")-1)) {
zval t;
char *lc_name = zend_str_tolower_dup(
Z_STRVAL(ZEND_OP1_LITERAL(opline - 1)), Z_STRLEN(ZEND_OP1_LITERAL(opline - 1)));
zend_module_entry *m = zend_hash_str_find_ptr(&module_registry,
lc_name, Z_STRLEN(ZEND_OP1_LITERAL(opline - 1)));
efree(lc_name);
if (!m) {
if (!PG(enable_dl)) {
break;
} else {
ZVAL_BOOL(&t, 0);
}
} else {
if (m->type == MODULE_PERSISTENT) {
ZVAL_BOOL(&t, 1);
} else {
break;
}
}
if (replace_var_by_const(op_array, opline + 1, ZEND_RESULT(opline).var, &t TSRMLS_CC)) {
literal_dtor(&ZEND_OP1_LITERAL(opline - 1));
MAKE_NOP((opline - 1));
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
} else if (Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("defined")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"defined", sizeof("defined")-1)) {
zval t;
if (zend_get_persistent_constant(Z_STR(ZEND_OP1_LITERAL(opline - 1)), &t, 0 TSRMLS_CC)) {
ZVAL_BOOL(&t, 1);
if (replace_var_by_const(op_array, opline + 1, ZEND_RESULT(opline).var, &t TSRMLS_CC)) {
literal_dtor(&ZEND_OP1_LITERAL(opline - 1));
MAKE_NOP((opline - 1));
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
}
} else if (Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("constant")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"constant", sizeof("constant")-1)) {
zval t;
if (zend_get_persistent_constant(Z_STR(ZEND_OP1_LITERAL(opline - 1)), &t, 1 TSRMLS_CC)) {
if (replace_var_by_const(op_array, opline + 1, ZEND_RESULT(opline).var, &t TSRMLS_CC)) {
literal_dtor(&ZEND_OP1_LITERAL(opline - 1));
MAKE_NOP((opline - 1));
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
}
} else if (Z_STRLEN(ZEND_OP1_LITERAL(opline)) == sizeof("strlen")-1 &&
!memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)),
"strlen", sizeof("strlen")-1)) {
zval t;
ZVAL_LONG(&t, Z_STRLEN(ZEND_OP1_LITERAL(opline - 1)));
if (replace_var_by_const(op_array, opline + 1, ZEND_RESULT(opline).var, &t TSRMLS_CC)) {
literal_dtor(&ZEND_OP1_LITERAL(opline - 1));
MAKE_NOP((opline - 1));
literal_dtor(&ZEND_OP1_LITERAL(opline));
MAKE_NOP(opline);
}
}
}
break;
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
case ZEND_DECLARE_CONST:
if (collect_constants &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) <= IS_STRING) {
zend_optimizer_collect_constant(constants, &ZEND_OP1_LITERAL(opline), &ZEND_OP2_LITERAL(opline));
}
break;
#endif
case ZEND_RETURN:
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
case ZEND_RETURN_BY_REF:
#endif
#if ZEND_EXTENSION_API_NO > PHP_5_4_X_API_NO
case ZEND_GENERATOR_RETURN:
#endif
case ZEND_EXIT:
case ZEND_THROW:
case ZEND_CATCH:
case ZEND_BRK:
case ZEND_CONT:
#if ZEND_EXTENSION_API_NO >= PHP_5_3_X_API_NO
case ZEND_GOTO:
#endif
#if ZEND_EXTENSION_API_NO > PHP_5_4_X_API_NO
case ZEND_FAST_CALL:
case ZEND_FAST_RET:
#endif
case ZEND_JMP:
case ZEND_JMPZNZ:
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_FE_RESET:
case ZEND_FE_FETCH:
case ZEND_NEW:
case ZEND_DO_FCALL_BY_NAME:
#if ZEND_EXTENSION_API_NO >= PHP_5_3_X_API_NO
case ZEND_JMP_SET:
#endif
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
case ZEND_JMP_SET_VAR:
#endif
collect_constants = 0;
break;
#if ZEND_EXTENSION_API_NO >= PHP_5_5_X_API_NO
case ZEND_FETCH_R:
case ZEND_FETCH_W:
case ZEND_FETCH_RW:
case ZEND_FETCH_FUNC_ARG:
case ZEND_FETCH_IS:
case ZEND_FETCH_UNSET:
if (opline != op_array->opcodes &&
(opline-1)->opcode == ZEND_BEGIN_SILENCE &&
(opline->extended_value & ZEND_FETCH_TYPE_MASK) == ZEND_FETCH_LOCAL &&
opline->op1_type == IS_CONST &&
opline->op2_type == IS_UNUSED &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING &&
(Z_STRLEN(ZEND_OP1_LITERAL(opline)) != sizeof("this")-1 ||
memcmp(Z_STRVAL(ZEND_OP1_LITERAL(opline)), "this", sizeof("this") - 1) != 0)) {
int var = opline->result.var;
int level = 0;
zend_op *op = opline + 1;
zend_op *use = NULL;
while (op < end) {
if (op->opcode == ZEND_BEGIN_SILENCE) {
level++;
} else if (op->opcode == ZEND_END_SILENCE) {
if (level == 0) {
break;
} else {
level--;
}
}
if (op->op1_type == IS_VAR && op->op1.var == var) {
if (use) {
/* used more than once */
use = NULL;
break;
}
use = op;
} else if (op->op2_type == IS_VAR && op->op2.var == var) {
if (use) {
/* used more than once */
use = NULL;
break;
}
use = op;
}
op++;
}
if (use) {
if (use->op1_type == IS_VAR && use->op1.var == var) {
use->op1_type = IS_CV;
use->op1.var = zend_optimizer_lookup_cv(op_array,
Z_STR(ZEND_OP1_LITERAL(opline)));
MAKE_NOP(opline);
} else if (use->op2_type == IS_VAR && use->op2.var == var) {
use->op2_type = IS_CV;
use->op2.var = zend_optimizer_lookup_cv(op_array,
Z_STR(ZEND_OP1_LITERAL(opline)));
MAKE_NOP(opline);
}
}
}
break;
#endif
}
opline++;
i++;
}
}
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