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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.
34 lines
693 B
PHP
34 lines
693 B
PHP
--TEST--
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GH-11245: In some specific cases SWITCH with one default statement will cause segfault (VAR 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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function xx() { return "somegarbage"; }
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switch (xx()) {
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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=4, args=0, vars=1, tmps=1)
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; (after optimizer)
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; %s
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0000 T1 = ISSET_ISEMPTY_CV (empty) CV0($xx)
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0001 JMPNZ T1 0003
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0002 RETURN null
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0003 RETURN int(1)
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xx:
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; (lines=1, args=0, vars=0, tmps=0)
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; (after optimizer)
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; %s
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0000 RETURN string("somegarbage")
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