Use ZEND_FAST_CONCAT instead of ZEND_CONCAT for CONST operands.

Use IS_EQUAL instead of CASE when first operand is CV or CONST. Removed CASE handlers that duplicated IS_EQUAL.

Return false for instanceof on literal

Implement list() reference assignments

Support list() reference assignments of the form:

list(&$a, list(&$b, $c)) = $d;

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

Implement list() reference assignments

Support list() reference assignments of the form:

list(&$a, list(&$b, $c)) = $d;

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

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Cleanup type conversion

Use zend_string_equal*() API for zend_string equality check instead of direct memcmp() usage.

Use cheaper functions

Set trailing zero

Intern auto global name strings in first place

Make sure string property/class const values are interned

This was done for user-definde class constant values, however this
is also important for properties and internal classes.

TYPE_CHECK instruction changed. Now it keeps in extended_value a type mask.
This makes check for "boolean" cheaper and allows check combination e.g. (is_string($a) || is_null($a))

Move adjust_for_fetch_type directly after emission

And drop the distinction between compile_X and compile_X_common.
This avoids WTF moments like compile_simple_var_no_cv completely
i

Move adjust_for_fetch_type directly after emission

And drop the distinction between compile_X and compile_X_common.
This avoids WTF moments like compile_simple_var_no_cv completely
ignoring the BP_VAR type passed to it...

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Minor fetch type adjustment cleanup

No need to call adjust_fetch_type on FETCH_THIS, just to special
case it in adjust_fetch_type...

Fixed memory leak (Zend/tests/list_003.phpt)

Reverted incomplete fix and too strict asserts.

Fixed string interning during constants substitution

RC manipulation cleanup

Fixed few inconsistent ZVALs in AST produced by compiler (REFCOUNTED and INTERNED strings)

Intern file names and class constants in first place (they may be interned later during constant substitution)

Prevent reference-counting on persistent zvals (internal constants, default properties and constants of internal classes).
New macro ZVAL_COPY_OR_DUP() is used perform duplication, if necessary.

Prevent reference-counting on persistent zvals (internal constants, default properties and constants of internal classes).
New macro ZVAL_COPY_OR_DUP() is used perform duplication, if necessary.
This should eliminate related race-coditions in ZTS build and prevent reference-counting bugs after unclean shutdown.

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Encapsulate reference-counting primitives.
Prohibit direct update of GC_REFCOUNT(), GC_SET_REFCOUNT(), GC_ADDREF() and GC_DELREF() shoukf be instead.
Added mactros to validate reference-count

Encapsulate reference-counting primitives.
Prohibit direct update of GC_REFCOUNT(), GC_SET_REFCOUNT(), GC_ADDREF() and GC_DELREF() shoukf be instead.
Added mactros to validate reference-counting (disabled for now).
These macros are going to be used to eliminate race-condintions during reference-counting on data shared between threads.

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Avoid HashTable allocations for empty arrays (using zend_empty_array).

PHP must not create circular arrays when element is assigned by value.

Always use IS_CONSTANT_AST (IS_CONSTANT is removed).

Changed zend_ast_ref structure to use only one allocation, removing dichotomy between heap/arena ASTs.