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5cad1a7176
The block optimizer pass allows the use of sources of the preceding block if the block is a follower and not a target. This causes issues when trying to remove FREE instructions: if the source is not in the block of the FREE, then the FREE and source are still removed. Therefore the other successor blocks, which must consume or FREE the temporary, will still contain the FREE opline. This opline will now refer to a temporary that doesn't exist anymore, which most of the time results in a crash. For these kind of non-local scenarios, we'll let the SSA based optimizations handle those cases. Closes GH-11251.
36 lines
755 B
PHP
36 lines
755 B
PHP
--TEST--
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GH-11245: In some specific cases SWITCH with one default statement will cause segfault (TMP variation)
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--INI--
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opcache.enable=1
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opcache.enable_cli=1
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opcache.optimization_level=0x7FFFBFFF
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opcache.opt_debug_level=0x20000
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opcache.preload=
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--EXTENSIONS--
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opcache
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--FILE--
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<?php
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class X {
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// Chosen to test for a memory leak.
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static $prop = "aa";
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}
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switch (++X::$prop) {
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default:
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if (empty($xx)) {return;}
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}
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?>
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--EXPECTF--
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$_main:
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; (lines=7, args=0, vars=1, tmps=2)
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; (after optimizer)
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; %s
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0000 T1 = PRE_INC_STATIC_PROP string("prop") string("X")
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0001 T2 = ISSET_ISEMPTY_CV (empty) CV0($xx)
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0002 JMPZ T2 0005
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0003 FREE T1
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0004 RETURN null
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0005 FREE T1
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0006 RETURN int(1)
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LIVE RANGES:
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1: 0001 - 0005 (tmp/var)
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