1--TEST-- 2DCE 009: Foreach over empty array is a no-op 3--INI-- 4opcache.enable=1 5opcache.enable_cli=1 6opcache.optimization_level=-1 7opcache.opt_debug_level=0x20000 8opcache.preload= 9--EXTENSIONS-- 10opcache 11--FILE-- 12<?php 13class Loop { 14 const VALUES = []; 15 public static function test() { 16 echo "Start\n"; 17 $y = []; 18 foreach ($y as $x) { 19 } 20 echo "Done\n"; 21 } 22 public static function test2() { 23 foreach (self::VALUES as $x) { 24 } 25 } 26 public static function test3() { 27 foreach ([] as $k => &$v) { 28 } 29 } 30} 31Loop::test(); 32Loop::test2(); 33Loop::test3(); 34--EXPECTF-- 35$_main: 36 ; (lines=7, args=0, vars=0, tmps=0) 37 ; (after optimizer) 38 ; %sdce_009.php:1-23 390000 INIT_STATIC_METHOD_CALL 0 string("Loop") string("test") 400001 DO_UCALL 410002 INIT_STATIC_METHOD_CALL 0 string("Loop") string("test2") 420003 DO_UCALL 430004 INIT_STATIC_METHOD_CALL 0 string("Loop") string("test3") 440005 DO_UCALL 450006 RETURN int(1) 46 47Loop::test: 48 ; (lines=3, args=0, vars=0, tmps=0) 49 ; (after optimizer) 50 ; %sdce_009.php:4-10 510000 ECHO string("Start 52") 530001 ECHO string("Done 54") 550002 RETURN null 56 57Loop::test2: 58 ; (lines=1, args=0, vars=0, tmps=0) 59 ; (after optimizer) 60 ; %sdce_009.php:11-14 610000 RETURN null 62 63Loop::test3: 64 ; (lines=3, args=0, vars=0, tmps=1) 65 ; (after optimizer) 66 ; %sdce_009.php:15-18 670000 V0 = FE_RESET_RW array(...) 0001 680001 FE_FREE V0 690002 RETURN null 70Start 71Done 72
