1--TEST-- 2DCE 001: Remove dead computation after constants propagation 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 13function foo(string $s1, string $s2, string $s3, string $s4) { 14 $x = ($s1 . $s2) . ($s3 . $s4); 15 $x = 0; 16 return $x; 17} 18?> 19--EXPECTF-- 20$_main: 21 ; (lines=1, args=0, vars=0, tmps=0) 22 ; (after optimizer) 23 ; %sdce_001.php:1-8 240000 RETURN int(1) 25 26foo: 27 ; (lines=5, args=4, vars=4, tmps=0) 28 ; (after optimizer) 29 ; %sdce_001.php:2-6 300000 CV0($s1) = RECV 1 310001 CV1($s2) = RECV 2 320002 CV2($s3) = RECV 3 330003 CV3($s4) = RECV 4 340004 RETURN int(0) 35
