Implement stackless internal function calls

Co-authored-by: Dmitry Stogov <dmitry@zend.com>

Closes GH-12461

Fix comp-time and constant evaluation of dynamic class constant fetch

Fixes GH-10486
Fixes oss-fuzz #55436
Fixes oss-fuzz #55472
Closes GH-10487

Implement dynamic class const fetch

https://wiki.php.net/rfc/dynamic_class_constant_fetch

Closes GH-9793

Update cache slot size calculation in compact_literals.c

Used string with biased hash for double deduplication

Rather than using a separate hash table for doubles, use the same
biases hash approach we use for everything else. Either way works

Used string with biased hash for double deduplication

Rather than using a separate hash table for doubles, use the same
biases hash approach we use for everything else. Either way works
fine, but there doesn't seem to be any strong reason to use a
different approach for doubles than we use for other cases.

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Assert no unrelated literals where unsupported

In the interest of being defensive.

Also drop an unnecessary check for a value that cannot be null.

Don't classify literals during compaction

This seems to be a leftover from when we were storing cache slots
inside literals and had to prevent merging of literals with
incompatible c

Don't classify literals during compaction

This seems to be a leftover from when we were storing cache slots
inside literals and had to prevent merging of literals with
incompatible cache slots. Nowadays the LITERAL_* classification
is not actually used for anything, we're only interested in the
number of related literals.

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Allow compacting LITERAL_VALUE with related literals

Nowadays we include the content of all the related literals in the
cache key, so DECLARE_CLASS (where both literals cannot be derived

Allow compacting LITERAL_VALUE with related literals

Nowadays we include the content of all the related literals in the
cache key, so DECLARE_CLASS (where both literals cannot be derived
from each other) no longer needs this special case.

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Use more appropriate types in Optimizer

Mainly using zend_result and bool instead of int

Pure Intersection types (#6799)

Implement pure intersection types RFC

RFC: https://wiki.php.net/rfc/pure-intersection-types

Co-authored-by: Nikita Popov <nikic@php.net>

Pure Intersection types (#6799)

Implement pure intersection types RFC

RFC: https://wiki.php.net/rfc/pure-intersection-types

Co-authored-by: Nikita Popov <nikic@php.net>
Co-authored-by: Ilija Tovilo <ilutov@php.net>

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Remove zend_make_printable_zval() use in debug code

This is an awkward API left from the PHP 5 times. Replacing it
with zval_get_string().

Merge branch 'PHP-8.0'

* PHP-8.0:
Fixed bug #81046

Update http->https in license (#6945)

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

Update http->https in license (#6945)

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 |

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Remove unnecessary php.h includes from Zend/

The Zend/ directory really shouldn't be including php headers.
These particular includes are plain unnecessary.

Introduce pseudo-keyword ZEND_FALLTHROUGH

And use it instead of comments

Reference dynamic functions through dynamic_defs

Currently, dynamically declared functions and closures are inserted
into the function table under a runtime definition key, and then late

Reference dynamic functions through dynamic_defs

Currently, dynamically declared functions and closures are inserted
into the function table under a runtime definition key, and then later
possibly renamed. When opcache is not used and a file containing a
closure is repeatedly included, this leads to a very large memory leak,
as the no longer needed closure declarations will never be freed
(https://bugs.php.net/bug.php?id=76982).

With this patch, dynamic functions are instead stored in a
dynamic_func_defs member on the op_array, which opcodes reference
by index. When the parent op_array is destroyed, the dynamic_func_defs
it contains are also destroyed (unless they are stilled used elsewhere,
e.g. because they have been bound, or are used by a live closure). This
resolves the fundamental part of the leak, though doesn't completely
fix it yet due to some arena allocations.

The main non-obvious change here is to static variable handling:
We can't destroy static_variables_ptr in destroy_op_array, as e.g.
that would clear the static variables in a dynamic function when
the op_array containing it is destroyed. Static variable destruction
is separated out for this reason (we already do static variable
destruction separately for normal functions, so we only need to
handle main scripts).

Closes GH-5595.

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Move optimizer into core

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

Move optimizer into core

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.

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