If there's a try-finally where the try_op starts on a basic block with a
single JMP, and the JMP optimization causes that basic block to become
unreachable, then we update try_op.
In this case, there is no catch_op, so try_op is erroneously set to 0,
we should instead set it to `b->start`.
Closes GH-18110.
`zend_uchar` suggests that the value is an ASCII character, but here,
it's about very small integers. This is misleading, so let's use a
C99 integer instead.
On all architectures currently supported by PHP, `zend_uchar` and
`uint8_t` are identical. This change is only about code readability.
While JMPZNZ can avoid execution of a separate JMP opcode in some
cases, it also prevents smart branch optimization, so creating
JMPZNZ may actually have a negative effect. It also adds additional
complexity for optimizations.
Drop JMPZNZ in favor of JMPZ+JMP or JMPNZ+JMP.
Closes GH-7857.
This reverts the change from 493c91c742.
Starting a new block means that in the common case where the loop var
free is not unreachable, we'll always merge back the block.
Instead fix the original problem by explicitly removing instructions
apart from the loop var free in block pass.
In the attached test case we ended up not updating a leftover
MATCH jump in the unreachable_free block. There's different ways
this can be addressed, but in this case we can just make sure that
a new block is started after the loop free, which will allow it
to be dropped as unreachable. We only need to retain the free
itself for live-range reconstruction.
Fixes oss-fuzz #39516.
Same as with throw expressions, this may remove later temporary
consuming instructions and thus eliminate live ranges, resulting
in a memory leak. We make use of the same hack and don't consider
exit a terminator if used in an expression context.
1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |
The never type can be used to indicate that a function never
returns, for example because it always unwinds.
RFC: https://wiki.php.net/rfc/noreturn_type
Closes GH-6761.
This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.
This does not yet try to make the optimizer usable independently
of opcache.
Closes GH-6642.
2021-01-28 10:38:25 +01:00
Renamed from ext/opcache/Optimizer/zend_cfg.c (Browse further)
