Check interrupt only if the link is a part of the loop.

Check reference guard once

Use "movaps" instead of "movsd" to copy the whole %xmm register.

Fixed reference-counting

Improved JIT for FETCH_DIM_R/IS and ISSET_DIM_OBJ

Use guard to check if array is packed or hash

Record information about packed arrays

Infer information about packed/hash arrays and use it for JIT

Fixed JIT failure on "$a = []; $a[1] += 2;"

Move AVOID_REFCOUNTING type info flag into a separate bit

Support for CASE_STRICT

JIT for MATCH and CASE_STRICT instructions

Better register usage for ASSIGN_DIM_OP

Better registers usage

cleanup unused parameters

efree() doesn't use line number arguments (pass zeros)

Load zval type into register to eliminate double load

Fixed tracing JIT crash in case SSA for op_array is not provided

Check for exception after $this destruction

Fixed register allocation for CASE instruction. CASE don't destroy first operand and it may be used later in VM or different trace.

JIT for ZEND_ISSET_ISEMPTY_CV

Removed outdated/duplicated code

Properly patch jmp tables

Promote "undefined array key" notice to warning

This implements the last remaining part of the
https://wiki.php.net/rfc/engine_warnings RFC.

Closes GH-5927.

Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument nam

Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument name. For now, it is looked up by linear scan and
runtime cached.
* This may leave UNDEF arguments on the stack. To avoid having
to deal with them in other places, a CHECK_UNDEF_ARGS opcode
is used to either replace them with defaults, or error.
* For variadic functions, EX(extra_named_params) are collected
and need to be freed based on ZEND_CALL_HAS_EXTRA_NAMED_PARAMS.

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

Closes GH-5357.

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