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139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/* pass 4
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* - optimize INIT_FCALL_BY_NAME to DO_FCALL
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*/
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#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
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typedef struct _optimizer_call_info {
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zend_function *func;
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zend_op *opline;
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} optimizer_call_info;
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static void optimize_func_calls(zend_op_array *op_array, zend_persistent_script *script TSRMLS_DC) {
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zend_op *opline = op_array->opcodes;
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zend_op *end = opline + op_array->last;
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int call = 0;
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#if ZEND_EXTENSION_API_NO > PHP_5_4_X_API_NO
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optimizer_call_info *call_stack = ecalloc(op_array->nested_calls + 1, sizeof(optimizer_call_info));
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#else
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int stack_size = 4;
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optimizer_call_info *call_stack = ecalloc(stack_size, sizeof(optimizer_call_info));
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#endif
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while (opline < end) {
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switch (opline->opcode) {
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case ZEND_INIT_FCALL_BY_NAME:
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case ZEND_INIT_NS_FCALL_BY_NAME:
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if (ZEND_OP2_TYPE(opline) == IS_CONST) {
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zend_function *func;
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zval *function_name = &op_array->literals[opline->op2.constant + 1].constant;
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if ((zend_hash_quick_find(&script->function_table,
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Z_STRVAL_P(function_name), Z_STRLEN_P(function_name) + 1,
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Z_HASH_P(function_name), (void **)&func) == SUCCESS)) {
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call_stack[call].func = func;
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}
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}
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/* break missing intentionally */
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case ZEND_NEW:
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case ZEND_INIT_METHOD_CALL:
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case ZEND_INIT_STATIC_METHOD_CALL:
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call_stack[call].opline = opline;
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call++;
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#if ZEND_EXTENSION_API_NO < PHP_5_5_X_API_NO
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if (call == stack_size) {
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stack_size += 4;
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call_stack = erealloc(call_stack, sizeof(optimizer_call_info) * stack_size);
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memset(call_stack + 4, 0, 4 * sizeof(optimizer_call_info));
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}
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#endif
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break;
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case ZEND_DO_FCALL_BY_NAME:
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call--;
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if (call_stack[call].func && call_stack[call].opline) {
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zend_op *fcall = call_stack[call].opline;
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opline->opcode = ZEND_DO_FCALL;
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ZEND_OP1_TYPE(opline) = IS_CONST;
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opline->op1.constant = fcall->op2.constant + 1;
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op_array->literals[fcall->op2.constant + 1].cache_slot = op_array->literals[fcall->op2.constant].cache_slot;
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literal_dtor(&ZEND_OP2_LITERAL(fcall));
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if (fcall->opcode == ZEND_INIT_NS_FCALL_BY_NAME) {
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literal_dtor(&op_array->literals[fcall->op2.constant + 2].constant);
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}
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MAKE_NOP(fcall);
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} else if (opline->extended_value == 0 &&
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call_stack[call].opline &&
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call_stack[call].opline->opcode == ZEND_INIT_FCALL_BY_NAME &&
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ZEND_OP2_TYPE(call_stack[call].opline) == IS_CONST) {
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zend_op *fcall = call_stack[call].opline;
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opline->opcode = ZEND_DO_FCALL;
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ZEND_OP1_TYPE(opline) = IS_CONST;
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opline->op1.constant = fcall->op2.constant + 1;
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op_array->literals[fcall->op2.constant + 1].cache_slot = op_array->literals[fcall->op2.constant].cache_slot;
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literal_dtor(&ZEND_OP2_LITERAL(fcall));
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MAKE_NOP(fcall);
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}
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call_stack[call].func = NULL;
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call_stack[call].opline = NULL;
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break;
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case ZEND_FETCH_FUNC_ARG:
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case ZEND_FETCH_OBJ_FUNC_ARG:
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case ZEND_FETCH_DIM_FUNC_ARG:
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if (call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, (opline->extended_value & ZEND_FETCH_ARG_MASK))) {
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opline->extended_value = 0;
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opline->opcode -= 9;
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} else {
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opline->extended_value = 0;
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opline->opcode -= 12;
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}
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}
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break;
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case ZEND_SEND_VAL:
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if (opline->extended_value == ZEND_DO_FCALL_BY_NAME && call_stack[call - 1].func) {
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if (ARG_MUST_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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/* We won't convert it into_DO_FCALL to emit error at run-time */
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call_stack[call - 1].opline = NULL;
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} else {
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opline->extended_value = ZEND_DO_FCALL;
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}
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}
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break;
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case ZEND_SEND_VAR:
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if (opline->extended_value == ZEND_DO_FCALL_BY_NAME && call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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opline->opcode = ZEND_SEND_REF;
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}
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opline->extended_value = ZEND_DO_FCALL;
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}
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break;
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case ZEND_SEND_VAR_NO_REF:
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if (!(opline->extended_value & ZEND_ARG_COMPILE_TIME_BOUND) && call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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opline->extended_value |= ZEND_ARG_COMPILE_TIME_BOUND | ZEND_ARG_SEND_BY_REF;
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} else if (opline->extended_value) {
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opline->extended_value |= ZEND_ARG_COMPILE_TIME_BOUND;
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} else {
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opline->opcode = ZEND_SEND_VAR;
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opline->extended_value = ZEND_DO_FCALL;
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}
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}
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break;
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case ZEND_SEND_REF:
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if (opline->extended_value == ZEND_DO_FCALL_BY_NAME && call_stack[call - 1].func) {
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/* We won't handle run-time pass by reference */
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call_stack[call - 1].opline = NULL;
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}
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break;
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default:
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break;
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}
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opline++;
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}
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efree(call_stack);
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}
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#endif
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