Fixed exception handling

Use "const" qualifier

Convert some notices to warnings

Part of https://wiki.php.net/rfc/engine_warnings.

Remove most uses of the ERROR type

It is now only used to signal exceptions for property reads. ERROR
zvals are never returned back to the VM anymore, so there's no
need to check for

Remove most uses of the ERROR type

It is now only used to signal exceptions for property reads. ERROR
zvals are never returned back to the VM anymore, so there's no
need to check for them when receiving a VAR.

Also return MAY_BE_ERROR, as ERROR is now no longer relevant for
inference.

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Promote write "use scalar as array" warning to Error

Convert "Illegal offset type" warnings to exceptions

Change representation of zend_type from type code to MAY_BE_* mask

This switches zend_type from storing a single IS_* type code to
storing a MAY_BE_* type mask. Right now most code still

Change representation of zend_type from type code to MAY_BE_* mask

This switches zend_type from storing a single IS_* type code to
storing a MAY_BE_* type mask. Right now most code still assumes
that there is only a single type in the mask (or two together
with MAY_BE_NULL). But this will make it a lot simpler to introduce
union types.

An additional advantage (and why I'm doing this separately), is
that a number of special cases no longer need to be handled
separately: We can do a single mask & (1 << type) check to handle
all simple types, booleans (true|false) and null.

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Don't make argument nullable based on AST null initializer

Closes GH-4720.

Implement array access notice in JIT

Don't verify arginfo types for internal functions

To avoid duplicate type checks. In debug builds arginfo is still
checked and will generate an assertions if the function doesn't
sub

Don't verify arginfo types for internal functions

To avoid duplicate type checks. In debug builds arginfo is still
checked and will generate an assertions if the function doesn't
subsequently throw an exception.

Some test results change due to differences in zpp and arginfo
error messages.

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Fix bug #78154 with JIT

Remove get() object handler

Now that set() is gone, there is little point in keeping get(), as
it is essentially just a different way of writing cast_object()
now.

Closes GH

Remove get() object handler

Now that set() is gone, there is little point in keeping get(), as
it is essentially just a different way of writing cast_object()
now.

Closes GH-4202.

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Simplify call frame initialization

Fix few compiler warnings.

Fix misplacement of calling convention declaration

MSVC is particularly picky about this, and won't compile as it is.

Fixed edge cases in ZEND_ASSIGN_OP+ASSIGN_DIM and replaced specialized helpers with single one

Removed checks for required object handlers

Eliminate hash lookup for immutable op_arrays

Added JIT compiler for x86 and x86_64