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diff --git a/ext/opcache/tests/jit/inc_015.phpt b/ext/opcache/tests/jit/inc_015.phpt
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+++ b/ext/opcache/tests/jit/inc_015.phpt
@@ -0,0 +1,21 @@
+--TEST--
+JIT INC: 015
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=1M
+opcache.protect_memory=1
+;opcache.jit_debug=257
+--SKIPIF--
+<?php require_once('../skipif.inc'); ?>
+--FILE--
+<?php
+function foo() {
+ $x = 1.0;
+ $x += 0;
+ return ++$x; // mem -> reg, reg
+}
+var_dump(foo());
+--EXPECT--
+float(2)