Fixed bug #80194

We should strip NOPs from unreachable_free blocks as well, to make
sure that the free really is the first op.

Fixed bug #80046

We already protect against optimizing away loop frees in DFA pass,
but not in block pass.

Make constant and copy propagation only for IS_TMP_VAR operands

ZEND_DECLARE_ANON_CLASS doesn't need to skip anything now. It's immediatelly followed by ZEND_NEW.

Replace ZEND_ASSIGN_ADD (and others) by ZEND_ASSIGN_OP, ZEND_ASSIGN_DIM_OP, ZEND_ASSGIN_OBJ_OP and ZEND_ASSIGN_STATIC_PROP_OP

Avoid memset/memcpy null ub in block pass

The arena allocator has no problem with zero-size allocations (and
will just return the same pointer for each in this case), so just
do that

Avoid memset/memcpy null ub in block pass

The arena allocator has no problem with zero-size allocations (and
will just return the same pointer for each in this case), so just
do that to avoid null pointers.

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Register class before fetching parent

We want the class declaration to be available while compiling the
parent class.

Implement spread operator in arrays

RFC: https://wiki.php.net/rfc/spread_operator_for_array

Closes GH-3640.

Don't remove CONST CAST in CONCAT operand

CONCAT assumes that CONST operands are strings, so we cannot
blindly remove CAST operands.

Remove unnecessary convert_to_string_safe macro

I'm assuming that the reason this existed was to avoid modifying
an interned string. However, the current code handles this case
fine

Remove unnecessary convert_to_string_safe macro

I'm assuming that the reason this existed was to avoid modifying
an interned string. However, the current code handles this case
fine already.

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Remove copyright years.

Implement ??= operator

RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator

$a ??= $b is $a ?? ($a = $b), with the difference that $a is only
evaluated once, to the degree

Implement ??= operator

RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator

$a ??= $b is $a ?? ($a = $b), with the difference that $a is only
evaluated once, to the degree that this is possible. In particular
in $a[foo()] ?? $b function foo() is only ever called once.
However, the variable access themselves will be reevaluated.

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Implement single-pass live range calculation

Instead of interleaving creation of live-ranges with the main
compiler code, compute them in a separate pass over the opcodes
as part of

Implement single-pass live range calculation

Instead of interleaving creation of live-ranges with the main
compiler code, compute them in a separate pass over the opcodes
as part of pass_two. Additionally, do not keep live ranges
synchronized during optimization in opcache and instead use the
same mechanism to recompute them after optimization.

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Fixed crash introduced by bfaf662ac2e58c16208224f32cb8387a35b3da97

Micro-optimization

Future-proof email addresses

Future-proof email addresses...

Pack zend_constant.flags and zend_constant.module_number into reserved space inside zend_constant.value.

se zval_ptr_dtor_str() instead of zend_string_release_ex(Z_STR(*), 0)

Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.

Don't store values of PHP_SAPI and PHP_BINARY in file cache, because it may be used by different SAPI.

Fixed bug #76275

* Adjust IS_SERIALIZED() check to account for potential empty
allocations at the end of the memory region.
* Deallocate empty allocation if all try/catch elements

Fixed bug #76275

* Adjust IS_SERIALIZED() check to account for potential empty
allocations at the end of the memory region.
* Deallocate empty allocation if all try/catch elements have been
removed in the block pass (similar to what we do if all live
ranges have been eliminated).

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Avoid useless iterations

Avoid live range references in opcodes

Don't store the live range of the freed variable for FREE_ON_RETURN
frees, instead look it up at runtime. As this is an extremely
unlikely code

Avoid live range references in opcodes

Don't store the live range of the freed variable for FREE_ON_RETURN
frees, instead look it up at runtime. As this is an extremely
unlikely codepath (in particular, it requires a loop variable with
a throwing destructor), saving the runtime lookup of the live range
is not worth the extra complexity this adds everywhere else.

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Fixed bug #75969

Move NOP stripping out of zend_optimize_block: NOP stripping may
move instructions, which may invalidate a Tsource shared across
an extended basic block.