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Name	Size	Permission	Date
.libs	[ DIR ]	drwxr-xr-x	2024-03-12 14:21
block_pass.c	62.85 KB	-rw-rw-r--	2022-10-31 11:36
block_pass.lo	343 B	-rw-r--r--	2024-03-12 14:20
block_pass.o	190.32 KB	-rw-r--r--	2024-03-12 14:20
compact_literals.c	26.82 KB	-rw-rw-r--	2022-10-31 11:36
compact_literals.lo	361 B	-rw-r--r--	2024-03-12 14:20
compact_literals.o	119.45 KB	-rw-r--r--	2024-03-12 14:20
compact_vars.c	4.32 KB	-rw-rw-r--	2022-10-31 11:36
compact_vars.lo	349 B	-rw-r--r--	2024-03-12 14:21
compact_vars.o	64.34 KB	-rw-r--r--	2024-03-12 14:21
dce.c	20.51 KB	-rw-rw-r--	2022-10-31 11:36
dce.lo	322 B	-rw-r--r--	2024-03-12 14:21
dce.o	146.59 KB	-rw-r--r--	2024-03-12 14:21
dfa_pass.c	41.96 KB	-rw-rw-r--	2022-10-31 11:36
dfa_pass.lo	337 B	-rw-r--r--	2024-03-12 14:20
dfa_pass.o	160.44 KB	-rw-r--r--	2024-03-12 14:20
escape_analysis.c	14.67 KB	-rw-rw-r--	2022-10-31 11:36
escape_analysis.lo	358 B	-rw-r--r--	2024-03-12 14:21
escape_analysis.o	127.1 KB	-rw-r--r--	2024-03-12 14:21
nop_removal.c	3.75 KB	-rw-rw-r--	2022-10-31 11:36
nop_removal.lo	346 B	-rw-r--r--	2024-03-12 14:20
nop_removal.o	71.97 KB	-rw-r--r--	2024-03-12 14:20
optimize_func_calls.c	10.06 KB	-rw-rw-r--	2022-10-31 11:36
optimize_func_calls.lo	370 B	-rw-r--r--	2024-03-12 14:20
optimize_func_calls.o	92.51 KB	-rw-r--r--	2024-03-12 14:20
optimize_temp_vars_5.c	6.25 KB	-rw-rw-r--	2022-10-31 11:36
optimize_temp_vars_5.lo	373 B	-rw-r--r--	2024-03-12 14:20
optimize_temp_vars_5.o	84.93 KB	-rw-r--r--	2024-03-12 14:20
pass1_5.c	20.27 KB	-rw-rw-r--	2022-10-31 11:36
pass1_5.lo	334 B	-rw-r--r--	2024-03-12 14:20
pass1_5.o	111.31 KB	-rw-r--r--	2024-03-12 14:20
pass2.c	8.03 KB	-rw-rw-r--	2022-10-31 11:36
pass2.lo	328 B	-rw-r--r--	2024-03-12 14:20
pass2.o	78.8 KB	-rw-r--r--	2024-03-12 14:20
pass3.c	13.99 KB	-rw-rw-r--	2022-10-31 11:36
pass3.lo	328 B	-rw-r--r--	2024-03-12 14:20
pass3.o	77.67 KB	-rw-r--r--	2024-03-12 14:20
sccp.c	71.32 KB	-rw-rw-r--	2022-10-31 11:36
sccp.lo	325 B	-rw-r--r--	2024-03-12 14:21
sccp.o	537.66 KB	-rw-r--r--	2024-03-12 14:21
scdf.c	9.43 KB	-rw-rw-r--	2022-10-31 11:36
scdf.h	3.46 KB	-rw-rw-r--	2022-10-31 11:36
scdf.lo	325 B	-rw-r--r--	2024-03-12 14:21
scdf.o	87.01 KB	-rw-r--r--	2024-03-12 14:21
ssa_integrity.c	12.62 KB	-rw-rw-r--	2022-10-31 11:36
zend_call_graph.c	9.27 KB	-rw-rw-r--	2022-10-31 11:36
zend_call_graph.h	3.17 KB	-rw-rw-r--	2022-10-31 11:36
zend_call_graph.lo	358 B	-rw-r--r--	2024-03-12 14:21
zend_call_graph.o	107.78 KB	-rw-r--r--	2024-03-12 14:21
zend_cfg.c	25.16 KB	-rw-rw-r--	2022-10-31 11:36
zend_cfg.h	5.57 KB	-rw-rw-r--	2022-10-31 11:36
zend_cfg.lo	337 B	-rw-r--r--	2024-03-12 14:20
zend_cfg.o	131.81 KB	-rw-r--r--	2024-03-12 14:20
zend_dfg.c	8.25 KB	-rw-rw-r--	2022-10-31 11:36
zend_dfg.h	1.85 KB	-rw-rw-r--	2022-10-31 11:36
zend_dfg.lo	337 B	-rw-r--r--	2024-03-12 14:20
zend_dfg.o	90.51 KB	-rw-r--r--	2024-03-12 14:20
zend_dump.c	35.72 KB	-rw-rw-r--	2022-10-31 11:36
zend_dump.h	2.27 KB	-rw-rw-r--	2022-10-31 11:36
zend_dump.lo	340 B	-rw-r--r--	2024-03-12 14:21
zend_dump.o	182.13 KB	-rw-r--r--	2024-03-12 14:21
zend_func_info.c	113.3 KB	-rw-rw-r--	2022-10-31 11:36
zend_func_info.h	2.59 KB	-rw-rw-r--	2022-10-31 11:36
zend_func_info.lo	355 B	-rw-r--r--	2024-03-12 14:21
zend_func_info.o	202.44 KB	-rw-r--r--	2024-03-12 14:21
zend_inference.c	142.98 KB	-rw-rw-r--	2022-10-31 11:36
zend_inference.h	11.71 KB	-rw-rw-r--	2022-10-31 11:36
zend_inference.lo	355 B	-rw-r--r--	2024-03-12 14:20
zend_inference.o	994.6 KB	-rw-r--r--	2024-03-12 14:20
zend_optimizer.c	49.12 KB	-rw-rw-r--	2022-10-31 11:36
zend_optimizer.h	4.58 KB	-rw-rw-r--	2022-10-31 11:36
zend_optimizer.lo	355 B	-rw-r--r--	2024-03-12 14:20
zend_optimizer.o	227.7 KB	-rw-r--r--	2024-03-12 14:20
zend_optimizer_internal.h	6.36 KB	-rw-rw-r--	2022-10-31 11:36
zend_ssa.c	51.56 KB	-rw-rw-r--	2022-10-31 11:36
zend_ssa.h	11.23 KB	-rw-rw-r--	2022-10-31 11:36
zend_ssa.lo	337 B	-rw-r--r--	2024-03-12 14:20
zend_ssa.o	196.41 KB	-rw-r--r--	2024-03-12 14:20
zend_worklist.h	3.82 KB	-rw-rw-r--	2022-10-31 11:36

Rename

/*
   +----------------------------------------------------------------------+
   | 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:           |
   | http://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>                              |
   +----------------------------------------------------------------------+
*/

#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"
#include "zend_bitset.h"

#define GET_AVAILABLE_T()					\
	for (i = 0; i < T; i++) {				\
		if (!zend_bitset_in(taken_T, i)) {	\
			break;							\
		}									\
	}										\
	zend_bitset_incl(taken_T, i);			\
	if (i > max) {							\
		max = i;							\
	}

void zend_optimize_temporary_variables(zend_op_array *op_array, zend_optimizer_ctx *ctx)
{
	int T = op_array->T;
	int offset = op_array->last_var;
	uint32_t bitset_len;
	zend_bitset taken_T;	/* T index in use */
	zend_op **start_of_T;	/* opline where T is first used */
	zend_bitset valid_T;	/* Is the map_T valid */
	int *map_T;				/* Map's the T to its new index */
	zend_op *opline, *end;
	int currT;
	int i;
	int max = -1;
	void *checkpoint = zend_arena_checkpoint(ctx->arena);

bitset_len = zend_bitset_len(T);
	taken_T = (zend_bitset) zend_arena_alloc(&ctx->arena, bitset_len * ZEND_BITSET_ELM_SIZE);
	start_of_T = (zend_op **) zend_arena_alloc(&ctx->arena, T * sizeof(zend_op *));
	valid_T = (zend_bitset) zend_arena_alloc(&ctx->arena, bitset_len * ZEND_BITSET_ELM_SIZE);
	map_T = (int *) zend_arena_alloc(&ctx->arena, T * sizeof(int));

end = op_array->opcodes;
    opline = &op_array->opcodes[op_array->last - 1];

/* Find T definition points */
    while (opline >= end) {
        if (opline->result_type & (IS_VAR | IS_TMP_VAR)) {
			start_of_T[VAR_NUM(opline->result.var) - offset] = opline;
		}
		opline--;
	}

zend_bitset_clear(valid_T, bitset_len);
	zend_bitset_clear(taken_T, bitset_len);

end = op_array->opcodes;
    opline = &op_array->opcodes[op_array->last - 1];

while (opline >= end) {
		if ((opline->op1_type & (IS_VAR | IS_TMP_VAR))) {
			currT = VAR_NUM(opline->op1.var) - offset;
			if (opline->opcode == ZEND_ROPE_END) {
				int num = (((opline->extended_value + 1) * sizeof(zend_string*)) + (sizeof(zval) - 1)) / sizeof(zval);
				int var;

var = max;
				while (var >= 0 && !zend_bitset_in(taken_T, var)) {
					var--;
				}
				max = MAX(max, var + num);
				var = var + 1;
				map_T[currT] = var;
				zend_bitset_incl(valid_T, currT);
				zend_bitset_incl(taken_T, var);
				opline->op1.var = NUM_VAR(var + offset);
				while (num > 1) {
					num--;
					zend_bitset_incl(taken_T, var + num);
				}
			} else {
				if (!zend_bitset_in(valid_T, currT)) {
					int use_new_var = 0;

/* Code in "finally" blocks may modify temorary variables.
					 * We allocate new temporaries for values that need to
					 * relive FAST_CALLs.
					 */
					if ((op_array->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK) &&
					    (opline->opcode == ZEND_RETURN ||
					     opline->opcode == ZEND_GENERATOR_RETURN ||
					     opline->opcode == ZEND_RETURN_BY_REF ||
					     opline->opcode == ZEND_FREE ||
					     opline->opcode == ZEND_FE_FREE)) {
						zend_op *curr = opline;

while (--curr >= end) {
							if (curr->opcode == ZEND_FAST_CALL) {
								use_new_var = 1;
								break;
							} else if (curr->opcode != ZEND_FREE &&
							           curr->opcode != ZEND_FE_FREE &&
							           curr->opcode != ZEND_VERIFY_RETURN_TYPE &&
							           curr->opcode != ZEND_DISCARD_EXCEPTION) {
								break;
							}
						}
					}
					if (use_new_var) {
						i = ++max;
						zend_bitset_incl(taken_T, i);
					} else {
						GET_AVAILABLE_T();
					}
					map_T[currT] = i;
					zend_bitset_incl(valid_T, currT);
				}
				opline->op1.var = NUM_VAR(map_T[currT] + offset);
			}
		}

if ((opline->op2_type & (IS_VAR | IS_TMP_VAR))) {
			currT = VAR_NUM(opline->op2.var) - offset;
			if (!zend_bitset_in(valid_T, currT)) {
				GET_AVAILABLE_T();
				map_T[currT] = i;
				zend_bitset_incl(valid_T, currT);
			}
			opline->op2.var = NUM_VAR(map_T[currT] + offset);
		}

if (opline->result_type & (IS_VAR | IS_TMP_VAR)) {
			currT = VAR_NUM(opline->result.var) - offset;
			if (zend_bitset_in(valid_T, currT)) {
				if (start_of_T[currT] == opline) {
					/* ZEND_FAST_CALL can not share temporary var with others
					 * since the fast_var could also be set by ZEND_HANDLE_EXCEPTION
					 * which could be ahead of it */
					if (opline->opcode != ZEND_FAST_CALL) {
						zend_bitset_excl(taken_T, map_T[currT]);
					}
				}
				opline->result.var = NUM_VAR(map_T[currT] + offset);
				if (opline->opcode == ZEND_ROPE_INIT) {
					if (start_of_T[currT] == opline) {
						uint32_t num = ((opline->extended_value * sizeof(zend_string*)) + (sizeof(zval) - 1)) / sizeof(zval);
						while (num > 1) {
							num--;
							zend_bitset_excl(taken_T, map_T[currT]+num);
						}
					}
				}
			} else {
				/* Code which gets here is using a wrongly built opcode such as RECV() */
				GET_AVAILABLE_T();
				map_T[currT] = i;
				zend_bitset_incl(valid_T, currT);
				opline->result.var = NUM_VAR(i + offset);
			}
		}

opline--;
	}

zend_arena_release(&ctx->arena, checkpoint);
	op_array->T = max + 1;
}