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= 9zend_test.observer.enabled=0 10--EXTENSIONS-- 11opcache 12--FILE-- 13<?php 14function foo(string $s1, string $s2, string $s3, string $s4) { 15 $x = ($s1 . $s2) . ($s3 . $s4); 16 $x = 0; 17 return $x; 18} 19?> 20--EXPECTF-- 21$_main: 22 ; (lines=1, args=0, vars=0, tmps=0) 23 ; (after optimizer) 24 ; %sdce_001.php:1-8 250000 RETURN int(1) 26 27foo: 28 ; (lines=5, args=4, vars=4, tmps=0) 29 ; (after optimizer) 30 ; %sdce_001.php:2-6 310000 CV0($s1) = RECV 1 320001 CV1($s2) = RECV 2 330002 CV2($s3) = RECV 3 340003 CV3($s4) = RECV 4 350004 RETURN int(0) 36
