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 8--SKIPIF-- 9<?php require_once('skipif.inc'); ?> 10--FILE-- 11<?php 12function foo(string $s1, string $s2, string $s3, string $s4) { 13 $x = ($s1 . $s2) . ($s3 . $s4); 14 $x = 0; 15 return $x; 16} 17?> 18--EXPECTF-- 19$_main: ; (lines=1, args=0, vars=0, tmps=0) 20 ; (after optimizer) 21 ; %sdce_001.php:1-8 22L0 (8): RETURN int(1) 23 24foo: ; (lines=5, args=4, vars=4, tmps=0) 25 ; (after optimizer) 26 ; %sdce_001.php:2-6 27L0 (2): CV0($s1) = RECV 1 28L1 (2): CV1($s2) = RECV 2 29L2 (2): CV2($s3) = RECV 3 30L3 (2): CV3($s4) = RECV 4 31L4 (5): RETURN int(0) 32
