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pass1.c
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/*
+----------------------------------------------------------------------+
| Zend OPcache |
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Stanislav Malyshev <stas@zend.com> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
/* pass 1 (Simple local optimizations)
* - persistent constant substitution (true, false, null, etc)
* - constant casting (ADD expects numbers, CONCAT strings, etc)
* - constant expression evaluation
* - optimize constant conditional JMPs
* - pre-evaluate constant function calls
* - eliminate FETCH $GLOBALS followed by FETCH_DIM/UNSET_DIM/ISSET_ISEMPTY_DIM
*/
#include "php.h"
#include "Optimizer/zend_optimizer.h"
#include "Optimizer/zend_optimizer_internal.h"
#include "zend_API.h"
#include "zend_constants.h"
#include "zend_execute.h"
#include "zend_vm.h"
void zend_optimizer_pass1(zend_op_array *op_array, zend_optimizer_ctx *ctx)
{
zend_op *opline = op_array->opcodes;
zend_op *end = opline + op_array->last;
bool collect_constants = (ZEND_OPTIMIZER_PASS_15 & ctx->optimization_level)?
(op_array == &ctx->script->main_op_array) : 0;
while (opline < end) {
switch (opline->opcode) {
case ZEND_CONCAT:
case ZEND_FAST_CONCAT:
if (opline->op1_type == IS_CONST) {
if (Z_TYPE(ZEND_OP1_LITERAL(opline)) != IS_STRING) {
convert_to_string(&ZEND_OP1_LITERAL(opline));
}
}
if (opline->op2_type == IS_CONST) {
if (Z_TYPE(ZEND_OP2_LITERAL(opline)) != IS_STRING) {
convert_to_string(&ZEND_OP2_LITERAL(opline));
}
if (opline->op1_type == IS_CONST) {
goto constant_binary_op;
}
}
break;
case ZEND_ADD:
case ZEND_SUB:
case ZEND_MUL:
case ZEND_DIV:
case ZEND_POW:
case ZEND_MOD:
case ZEND_SL:
case ZEND_SR:
case ZEND_BW_OR:
case ZEND_BW_AND:
case ZEND_BW_XOR:
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_BOOL_XOR:
case ZEND_SPACESHIP:
case ZEND_CASE:
case ZEND_CASE_STRICT:
if (opline->op1_type == IS_CONST &&
opline->op2_type == IS_CONST) {
/* binary operation with constant operands */
zval result;
constant_binary_op:
if (zend_optimizer_eval_binary_op(&result, opline->opcode, &ZEND_OP1_LITERAL(opline), &ZEND_OP2_LITERAL(opline)) == SUCCESS) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
literal_dtor(&ZEND_OP2_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_TMP_VAR, opline->result.var, &result)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &result);
}
}
}
break;
case ZEND_ASSIGN_OP:
if (opline->op2_type == IS_CONST) {
if (opline->extended_value == ZEND_ADD
|| opline->extended_value == ZEND_SUB
|| opline->extended_value == ZEND_MUL
|| opline->extended_value == ZEND_DIV
|| opline->extended_value == ZEND_POW) {
if (Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
/* don't optimize if it should produce a runtime numeric string error */
if (is_numeric_string(Z_STRVAL(ZEND_OP2_LITERAL(opline)), Z_STRLEN(ZEND_OP2_LITERAL(opline)), NULL, NULL, 0)) {
convert_scalar_to_number(&ZEND_OP2_LITERAL(opline));
}
}
} else if (opline->extended_value == ZEND_MOD
|| opline->extended_value == ZEND_SL
|| opline->extended_value == ZEND_SR) {
zval *op2 = &ZEND_OP2_LITERAL(opline);
if (Z_TYPE_P(op2) != IS_LONG) {
if (!zend_is_op_long_compatible(op2)) {
break;
}
convert_to_long(op2);
}
} else if (opline->extended_value == ZEND_CONCAT) {
if (Z_TYPE(ZEND_OP2_LITERAL(opline)) != IS_STRING) {
convert_to_string(&ZEND_OP2_LITERAL(opline));
}
}
}
break;
case ZEND_CAST:
if (opline->op1_type == IS_CONST) {
/* cast of constant operand */
zval result;
if (zend_optimizer_eval_cast(&result, opline->extended_value, &ZEND_OP1_LITERAL(opline)) == SUCCESS) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline + 1, opline->result_type, opline->result.var, &result)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
zend_optimizer_update_op1_const(op_array, opline, &result);
}
break;
}
}
break;
case ZEND_BW_NOT:
case ZEND_BOOL_NOT:
if (opline->op1_type == IS_CONST) {
/* unary operation on constant operand */
zval result;
if (zend_optimizer_eval_unary_op(&result, opline->opcode, &ZEND_OP1_LITERAL(opline)) == SUCCESS) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_TMP_VAR, opline->result.var, &result)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
zend_optimizer_update_op1_const(op_array, opline, &result);
}
}
}
break;
case ZEND_FETCH_CONSTANT:
if (opline->op2_type == 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_execute_data *orig_execute_data = EG(current_execute_data);
zend_execute_data fake_execute_data;
zval *offset;
memset(&fake_execute_data, 0, sizeof(zend_execute_data));
fake_execute_data.func = (zend_function*)op_array;
EG(current_execute_data) = &fake_execute_data;
if ((offset = zend_get_constant_str("__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1)) != NULL) {
literal_dtor(&ZEND_OP2_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline, IS_TMP_VAR, opline->result.var, offset)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, offset);
}
}
EG(current_execute_data) = orig_execute_data;
break;
}
if (opline->op2_type == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
/* substitute persistent constants */
zval c;
if (!zend_optimizer_get_persistent_constant(Z_STR(ZEND_OP2_LITERAL(opline)), &c, 1)) {
if (!ctx->constants || !zend_optimizer_get_collected_constant(ctx->constants, &ZEND_OP2_LITERAL(opline), &c)) {
break;
}
}
if (Z_TYPE(c) == IS_CONSTANT_AST) {
break;
}
literal_dtor(&ZEND_OP2_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline, IS_TMP_VAR, opline->result.var, &c)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &c);
}
}
break;
case ZEND_FETCH_CLASS_CONSTANT:
if (opline->op2_type == IS_CONST &&
Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) {
zend_class_entry *ce = NULL;
if (opline->op1_type == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING) {
/* for A::B */
if (op_array->scope &&
zend_string_equals_ci(Z_STR(ZEND_OP1_LITERAL(opline)), op_array->scope->name)) {
ce = op_array->scope;
} else {
ce = zend_optimizer_get_class_entry(
ctx->script, Z_STR(op_array->literals[opline->op1.constant + 1]));
if (!ce) {
break;
}
}
} else if (op_array->scope &&
opline->op1_type == IS_UNUSED &&
(opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF) {
/* for self::B */
ce = op_array->scope;
} else if (op_array->scope &&
opline->op1_type == IS_VAR &&
(opline - 1)->opcode == ZEND_FETCH_CLASS &&
((opline - 1)->op2_type == IS_UNUSED &&
((opline - 1)->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF) &&
(opline - 1)->result.var == opline->op1.var) {
/* for self::B */
ce = op_array->scope;
}
if (ce) {
zend_class_constant *cc;
zval *c, t;
if ((cc = zend_hash_find_ptr(&ce->constants_table,
Z_STR(ZEND_OP2_LITERAL(opline)))) != NULL &&
(ZEND_CLASS_CONST_FLAGS(cc) & ZEND_ACC_PPP_MASK) == ZEND_ACC_PUBLIC) {
c = &cc->value;
if (Z_TYPE_P(c) == IS_CONSTANT_AST) {
zend_ast *ast = Z_ASTVAL_P(c);
if (ast->kind != ZEND_AST_CONSTANT
|| !zend_optimizer_get_persistent_constant(zend_ast_get_constant_name(ast), &t, 1)
|| Z_TYPE(t) == IS_CONSTANT_AST) {
break;
}
} else {
ZVAL_COPY_OR_DUP(&t, c);
}
if (opline->op1_type == IS_CONST) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
} else if (opline->op1_type == IS_VAR) {
MAKE_NOP((opline - 1));
}
literal_dtor(&ZEND_OP2_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline, IS_TMP_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &t);
}
}
}
}
break;
case ZEND_DO_ICALL: {
zend_op *send1_opline = opline - 1;
zend_op *send2_opline = NULL;
zend_op *init_opline = NULL;
while (send1_opline->opcode == ZEND_NOP) {
send1_opline--;
}
if (send1_opline->opcode != ZEND_SEND_VAL ||
send1_opline->op1_type != IS_CONST) {
/* don't collect constants after unknown function call */
collect_constants = 0;
break;
}
if (send1_opline->op2.num == 2) {
send2_opline = send1_opline;
send1_opline--;
while (send1_opline->opcode == ZEND_NOP) {
send1_opline--;
}
if (send1_opline->opcode != ZEND_SEND_VAL ||
send1_opline->op1_type != IS_CONST) {
/* don't collect constants after unknown function call */
collect_constants = 0;
break;
}
}
init_opline = send1_opline - 1;
while (init_opline->opcode == ZEND_NOP) {
init_opline--;
}
if (init_opline->opcode != ZEND_INIT_FCALL ||
init_opline->op2_type != IS_CONST ||
Z_TYPE(ZEND_OP2_LITERAL(init_opline)) != IS_STRING) {
/* don't collect constants after unknown function call */
collect_constants = 0;
break;
}
/* define("name", scalar); */
if (zend_string_equals_literal_ci(Z_STR(ZEND_OP2_LITERAL(init_opline)), "define")) {
if (Z_TYPE(ZEND_OP1_LITERAL(send1_opline)) == IS_STRING &&
send2_opline &&
Z_TYPE(ZEND_OP1_LITERAL(send2_opline)) <= IS_STRING) {
if (collect_constants) {
zend_optimizer_collect_constant(ctx, &ZEND_OP1_LITERAL(send1_opline), &ZEND_OP1_LITERAL(send2_opline));
}
if (RESULT_UNUSED(opline) &&
!zend_memnstr(Z_STRVAL(ZEND_OP1_LITERAL(send1_opline)), "::", sizeof("::") - 1, Z_STRVAL(ZEND_OP1_LITERAL(send1_opline)) + Z_STRLEN(ZEND_OP1_LITERAL(send1_opline)))) {
opline->opcode = ZEND_DECLARE_CONST;
opline->op1_type = IS_CONST;
opline->op2_type = IS_CONST;
opline->result_type = IS_UNUSED;
opline->op1.constant = send1_opline->op1.constant;
opline->op2.constant = send2_opline->op1.constant;
opline->result.num = 0;
literal_dtor(&ZEND_OP2_LITERAL(init_opline));
MAKE_NOP(init_opline);
MAKE_NOP(send1_opline);
MAKE_NOP(send2_opline);
}
break;
}
}
/* pre-evaluate constant functions:
constant(x)
function_exists(x)
is_callable(x)
extension_loaded(x)
*/
if (!send2_opline &&
Z_TYPE(ZEND_OP1_LITERAL(send1_opline)) == IS_STRING) {
if ((Z_STRLEN(ZEND_OP2_LITERAL(init_opline)) == sizeof("function_exists")-1 &&
!memcmp(Z_STRVAL(ZEND_OP2_LITERAL(init_opline)),
"function_exists", sizeof("function_exists")-1)) ||
(Z_STRLEN(ZEND_OP2_LITERAL(init_opline)) == sizeof("is_callable")-1 &&
!memcmp(Z_STRVAL(ZEND_OP2_LITERAL(init_opline)),
"is_callable", sizeof("is_callable")))) {
zend_internal_function *func;
zend_string *lc_name = zend_string_tolower(
Z_STR(ZEND_OP1_LITERAL(send1_opline)));
if ((func = zend_hash_find_ptr(EG(function_table), lc_name)) != NULL
&& func->type == ZEND_INTERNAL_FUNCTION
&& func->module->type == MODULE_PERSISTENT
#ifdef ZEND_WIN32
&& func->module->handle == NULL
#endif
) {
zval t;
ZVAL_TRUE(&t);
literal_dtor(&ZEND_OP2_LITERAL(init_opline));
MAKE_NOP(init_opline);
literal_dtor(&ZEND_OP1_LITERAL(send1_opline));
MAKE_NOP(send1_opline);
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &t);
}
}
zend_string_release_ex(lc_name, 0);
break;
} else if (Z_STRLEN(ZEND_OP2_LITERAL(init_opline)) == sizeof("extension_loaded")-1 &&
!memcmp(Z_STRVAL(ZEND_OP2_LITERAL(init_opline)),
"extension_loaded", sizeof("extension_loaded")-1)) {
zval t;
zend_string *lc_name = zend_string_tolower(
Z_STR(ZEND_OP1_LITERAL(send1_opline)));
zend_module_entry *m = zend_hash_find_ptr(&module_registry,
lc_name);
zend_string_release_ex(lc_name, 0);
if (!m) {
if (PG(enable_dl)) {
break;
} else {
ZVAL_FALSE(&t);
}
} else {
if (m->type == MODULE_PERSISTENT
#ifdef ZEND_WIN32
&& m->handle == NULL
#endif
) {
ZVAL_TRUE(&t);
} else {
break;
}
}
literal_dtor(&ZEND_OP2_LITERAL(init_opline));
MAKE_NOP(init_opline);
literal_dtor(&ZEND_OP1_LITERAL(send1_opline));
MAKE_NOP(send1_opline);
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &t);
}
break;
} else if (Z_STRLEN(ZEND_OP2_LITERAL(init_opline)) == sizeof("constant")-1 &&
!memcmp(Z_STRVAL(ZEND_OP2_LITERAL(init_opline)),
"constant", sizeof("constant")-1)) {
zval t;
if (zend_optimizer_get_persistent_constant(Z_STR(ZEND_OP1_LITERAL(send1_opline)), &t, 1)) {
literal_dtor(&ZEND_OP2_LITERAL(init_opline));
MAKE_NOP(init_opline);
literal_dtor(&ZEND_OP1_LITERAL(send1_opline));
MAKE_NOP(send1_opline);
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &t);
}
}
break;
/* dirname(IS_CONST/IS_STRING) -> IS_CONST/IS_STRING */
} else if (Z_STRLEN(ZEND_OP2_LITERAL(init_opline)) == sizeof("dirname")-1 &&
!memcmp(Z_STRVAL(ZEND_OP2_LITERAL(init_opline)),
"dirname", sizeof("dirname") - 1) &&
IS_ABSOLUTE_PATH(Z_STRVAL(ZEND_OP1_LITERAL(send1_opline)), Z_STRLEN(ZEND_OP1_LITERAL(send1_opline)))) {
zend_string *dirname = zend_string_init(Z_STRVAL(ZEND_OP1_LITERAL(send1_opline)), Z_STRLEN(ZEND_OP1_LITERAL(send1_opline)), 0);
ZSTR_LEN(dirname) = zend_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
if (IS_ABSOLUTE_PATH(ZSTR_VAL(dirname), ZSTR_LEN(dirname))) {
zval t;
ZVAL_STR(&t, dirname);
literal_dtor(&ZEND_OP2_LITERAL(init_opline));
MAKE_NOP(init_opline);
literal_dtor(&ZEND_OP1_LITERAL(send1_opline));
MAKE_NOP(send1_opline);
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
opline->extended_value = 0;
SET_UNUSED(opline->op2);
zend_optimizer_update_op1_const(op_array, opline, &t);
}
} else {
zend_string_release_ex(dirname, 0);
}
break;
}
}
/* don't collect constants after any other function call */
collect_constants = 0;
break;
}
case ZEND_STRLEN:
if (opline->op1_type == IS_CONST) {
zval t;
if (zend_optimizer_eval_strlen(&t, &ZEND_OP1_LITERAL(opline)) == SUCCESS) {
literal_dtor(&ZEND_OP1_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline + 1, IS_TMP_VAR, opline->result.var, &t)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
zend_optimizer_update_op1_const(op_array, opline, &t);
}
}
}
break;
case ZEND_DEFINED:
{
zval c;
if (!zend_optimizer_get_persistent_constant(Z_STR(ZEND_OP1_LITERAL(opline)), &c, 0)) {
break;
}
ZVAL_TRUE(&c);
literal_dtor(&ZEND_OP1_LITERAL(opline));
if (zend_optimizer_replace_by_const(op_array, opline, IS_TMP_VAR, opline->result.var, &c)) {
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_QM_ASSIGN;
zend_optimizer_update_op1_const(op_array, opline, &c);
}
}
break;
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(ctx, &ZEND_OP1_LITERAL(opline), &ZEND_OP2_LITERAL(opline));
}
break;
#if 0
/* see ext/opcache/tests/bug78961.phpt */
// case ZEND_FETCH_R:
case ZEND_FETCH_W:
// case ZEND_FETCH_RW:
case ZEND_FETCH_IS:
// case ZEND_FETCH_FUNC_ARG:
case ZEND_FETCH_UNSET:
/* convert FETCH $GLOBALS (global), FETCH_DIM $x into FETCH $x (global) */
if ((opline->extended_value & ZEND_FETCH_GLOBAL) != 0 &&
opline->op1_type == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING &&
zend_string_equals_literal(Z_STR(ZEND_OP1_LITERAL(opline)), "GLOBALS") &&
((opline + 1)->opcode == opline->opcode + 1 ||
((opline + 1)->opcode == ZEND_UNSET_DIM &&
opline->opcode == ZEND_FETCH_UNSET) ||
((opline + 1)->opcode == ZEND_ISSET_ISEMPTY_DIM_OBJ &&
opline->opcode == ZEND_FETCH_IS)) &&
(opline + 1)->op1_type == opline->result_type &&
(opline + 1)->op1.var == opline->result.var &&
((opline + 1)->op2_type != IS_CONST ||
Z_TYPE(ZEND_OP2_LITERAL(opline + 1)) < IS_ARRAY)) {
if ((opline + 1)->opcode == ZEND_UNSET_DIM) {
(opline + 1)->opcode = ZEND_UNSET_VAR;
(opline + 1)->extended_value = ZEND_FETCH_GLOBAL;
} else if ((opline + 1)->opcode == ZEND_ISSET_ISEMPTY_DIM_OBJ) {
(opline + 1)->opcode = ZEND_ISSET_ISEMPTY_VAR;
(opline + 1)->extended_value |= ZEND_FETCH_GLOBAL;
} else {
(opline + 1)->opcode = opline->opcode;
(opline + 1)->extended_value = ZEND_FETCH_GLOBAL;
}
(opline + 1)->op1_type = (opline + 1)->op2_type;
(opline + 1)->op1 = (opline + 1)->op2;
if ((opline + 1)->op1_type == IS_CONST &&
Z_TYPE(ZEND_OP1_LITERAL(opline + 1)) != IS_STRING) {
convert_to_string(&ZEND_OP1_LITERAL(opline + 1));
zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline + 1)));
}
SET_UNUSED((opline + 1)->op2);
MAKE_NOP(opline);
}
break;
#endif
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
/* convert Ti = JMPZ_EX(C, L) => Ti = QM_ASSIGN(C)
in case we know it wouldn't jump */
if (opline->op1_type == IS_CONST) {
if (zend_is_true(&ZEND_OP1_LITERAL(opline))) {
if (opline->opcode == ZEND_JMPZ_EX) {
opline->opcode = ZEND_QM_ASSIGN;
zval_ptr_dtor_nogc(&ZEND_OP1_LITERAL(opline));
ZVAL_TRUE(&ZEND_OP1_LITERAL(opline));
opline->op2.num = 0;
break;
}
} else {
if (opline->opcode == ZEND_JMPNZ_EX) {
opline->opcode = ZEND_QM_ASSIGN;
zval_ptr_dtor_nogc(&ZEND_OP1_LITERAL(opline));
ZVAL_FALSE(&ZEND_OP1_LITERAL(opline));
opline->op2.num = 0;
break;
}
}
}
collect_constants = 0;
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
if (opline->op1_type == IS_CONST) {
int should_jmp = zend_is_true(&ZEND_OP1_LITERAL(opline));
if (opline->opcode == ZEND_JMPZ) {
should_jmp = !should_jmp;
}
literal_dtor(&ZEND_OP1_LITERAL(opline));
opline->op1_type = IS_UNUSED;
if (should_jmp) {
opline->opcode = ZEND_JMP;
COPY_NODE(opline->op1, opline->op2);
opline->op2.num = 0;
} else {
MAKE_NOP(opline);
break;
}
}
collect_constants = 0;
break;
case ZEND_JMPZNZ:
if (opline->op1_type == IS_CONST) {
zend_op *target_opline;
if (zend_is_true(&ZEND_OP1_LITERAL(opline))) {
target_opline = ZEND_OFFSET_TO_OPLINE(opline, opline->extended_value); /* JMPNZ */
} else {
target_opline = ZEND_OP2_JMP_ADDR(opline); /* JMPZ */
}
literal_dtor(&ZEND_OP1_LITERAL(opline));
ZEND_SET_OP_JMP_ADDR(opline, opline->op1, target_opline);
opline->op1_type = IS_UNUSED;
opline->opcode = ZEND_JMP;
}
collect_constants = 0;
break;
case ZEND_RETURN:
case ZEND_RETURN_BY_REF:
case ZEND_GENERATOR_RETURN:
case ZEND_EXIT:
case ZEND_THROW:
case ZEND_MATCH_ERROR:
case ZEND_CATCH:
case ZEND_FAST_CALL:
case ZEND_FAST_RET:
case ZEND_JMP:
case ZEND_FE_RESET_R:
case ZEND_FE_RESET_RW:
case ZEND_FE_FETCH_R:
case ZEND_FE_FETCH_RW:
case ZEND_JMP_SET:
case ZEND_COALESCE:
case ZEND_ASSERT_CHECK:
case ZEND_JMP_NULL:
case ZEND_VERIFY_NEVER_TYPE:
collect_constants = 0;
break;
}
opline++;
}
}