Inline few small opcode handlers into hybrid executor

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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fix unknown opcode overflow error

Moved "zval.u2.cache_slot" into free room of "zend_op"

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and

Avoid repeatable ARG_SHOULD_BE_SENT_BY_REF() checks in FETCH_*FUNC_ARG and following SEND_VAR_EX. Perform the check once in a new CHECK_FUNC_ARG opcode and reuse in the following FETCH_*FUNC_ARG and SEND_FUNC_ARG (SEND_VAR_EX replacement).

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Changed CATCH instruction format (extended_value moved into op2, op2 into result, result into extended_value)

Changed FETCH_CONSTANT instruction format (extended_value moved into op1)

Changed FETCH_CLASS instruction format (extended_value moved into op1)

Use fastcall calling convention

year++

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.

Removed useless specialization

Array addition is not commutative

Remove duplicate handlers for commutative operations

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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Reduced VM code size.
Made FETCH_DIM/OBJ_FUNC_ARG to dispatch ro corresponding FETCH_DIM/OBJ_R/_W handlers.
Merged TMP and VAR specializations of ZEND_FETCH_OBJ_R.
Allowed dispatching to

Reduced VM code size.
Made FETCH_DIM/OBJ_FUNC_ARG to dispatch ro corresponding FETCH_DIM/OBJ_R/_W handlers.
Merged TMP and VAR specializations of ZEND_FETCH_OBJ_R.
Allowed dispatching to less specialized handelrs and helpers. (e.g. from OP_TMP_CONST to OP_TMPVAR_CONST).

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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))

Separate ISSET_ISEMPTY_CV/UNSET_CV from ISSET_ISEMPTY_VAR/UNSET_VAR

Update opcode description

Added ZEND_FUNC_NUM_ARGS, ZEND_FUNC_GET_ARGS instructions, to implement corresponding builtin functions.
Special optimisation for "array_slice(INT, func_get_args())" pattern.

Added ZEND_GET_CLASS, ZEMD_GET_CALLED_CLASS, ZEND_GET_TYPE instructions, to implement corresponding builtin functions.

Added ZEND_COUNT instruction, to implement corresponding builtin.

Added ZEND_IN_ARRAY instruction, implementing optimized in_array() builtin function, through hash lookup in flipped array

Implement jumptable optimization