Patch improvement:

Removed the corresponding core code.
Fixed ext/com_dotnet and ext/date.
Refactored ext/intl changes.
Improved ext/fileinfo and ext/pdo changes.
Fixed tests.

cleanup

Optimized strings concatenation.
ZEND_ADD_STRING/VAR/CHAR are replaced with ZEND_ROPE_INTI, ZEND_ROPE_ADD, ZEND_ROPE_END.
Instead of reallocation and copying string on each ZEND_ADD_STRING/VA

Optimized strings concatenation.
ZEND_ADD_STRING/VAR/CHAR are replaced with ZEND_ROPE_INTI, ZEND_ROPE_ADD, ZEND_ROPE_END.
Instead of reallocation and copying string on each ZEND_ADD_STRING/VAR/CAHR, collect all the strings and then allocate and construct the resulting string once.

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Fix VERIFY_RETURN separation

a) The SAME_FAKE_TYPE check should always occur on the dereferenced
value, otherwise we'll end up separating large referenced arrays.
b) For by-val retur

Fix VERIFY_RETURN separation

a) The SAME_FAKE_TYPE check should always occur on the dereferenced
value, otherwise we'll end up separating large referenced arrays.
b) For by-val return with an rc=1 reference, the SEPARATE_ZVAL
wouldn't do anything. Add a ZVAL_UNREF for this case.

I don't like this fix - there must be some better way to express
this.

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Introduce ZEND_ASSUME() macro to help optimizing code.
Reuse ZEND_ASSERT() conditions for optimization.

Fixed in-place modification of IS_CONST operand

ZPP changed to lazely check for "strict/weak" only if it's really necessary.
Cleanup.

Fixed return type hint handling for constants

Improved type hinting:

EX_PREV_USES_STRICT_TYPES() and family changed/renamed to fit with other macros
Optimized zend_verify_internal_arg_type() and family (they don't need "strict" argu

Improved type hinting:

EX_PREV_USES_STRICT_TYPES() and family changed/renamed to fit with other macros
Optimized zend_verify_internal_arg_type() and family (they don't need "strict" argument anymore)
Standerd ZPP is called from VM only for weak type check or strict exception (int -> double)
Fixed ZEND_RECV_VARIADIC
Fixed ZEND_STRLEN

TODO: should we accept IS_NULL for non-nullable arguments?

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Fixed white spaces

Reduce the number of times that the zval needs to be separated in return type checking to those that are necessary

Refactor as to not use call info, but add the flag to the op_array.

Fix severity issues with callbacks, start work porting ZEND_STRLEN opcode to work with strict mode, more refactoring to come

Fix return type separation with references. It now includes a check in the opcode handler and properly separates the value in both cases

Fix executor issue with ignoring strict types, which cleans up a bunch of errors. Additionally fix the expected error of 2 unrelated tests that was caused by a change to the core error messages

Better make this be consistent with DO_ICALL/DO_CALL

Revert "Use more specific op type"
This reverts commit 9b07ed6dcc6f0f77fa75ee6a5c2b21298b87f509.

Use more specific op type

Reimplemented special constant handling. Now __HALT_COMPILER_OFFSET__ is resolved at compile-time. __CLASS__ retrived using separate ZEND_FETCH_CLASS_NAME opcode.

Implement Generator::getReturn()

Conflicts:
Zend/zend_vm_execute.h

Embed "fast" operator functions (add, sub, increment, etc) into executor with additional optimizations

improved timeout handling on windows

Use memcmp() instead of strncmp()

Use fastcall calling convention for most critical ZE subsystems.

Changed HashTable layout:

Removed HashTable->arHash (reduced memory consumption). Now hash slots may be accessed using HT_HASH() macro.
Hash slotas are allocated together with Buckets (b

Changed HashTable layout:

Removed HashTable->arHash (reduced memory consumption). Now hash slots may be accessed using HT_HASH() macro.
Hash slotas are allocated together with Buckets (before them) and lay in reverse order from HashTable->arData base address (see comments in Zend/zend_types.h)
Indexes in hash table and conflict resolution chains (Z_NEXT) may be stored as indeces or offsets in bytes, depending on system (32 or 64-bit).
HashTable data filelds are reordered to keep the most useful for zend_hash_find() data in the same CPU cache line.

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Added API function to call VM opcode handler in a portable way