Don't try to exclude zreg_none

zreg_none has no representation in the regset, so this operation
doesn't make sense.

Avoid UB in overflow checks

Some of the overflow checks in zend_may_overflow were optimized
away by clang, causing JIT failures on release macos.

Don't JIT functions with many blocks

Avoids a stack overflow in Zend/tests/runtime_compile_time_binary_operands.php
that happens in recursive RPO calculation. We could make that code

Don't JIT functions with many blocks

Avoids a stack overflow in Zend/tests/runtime_compile_time_binary_operands.php
that happens in recursive RPO calculation. We could make that code
non-recursive, but I don't think it makes sense to JIT this kind of
function in the first place.

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Respect optimization_level when running JIT inference

Don't enable unsafe type inference by default -- we'll segfault on
some FFI tests.

Implemented JIT for SWITCH_LONG/SWITCH_STRING

Keep EX(opline) in consistency when call engine and helper functions

Fixed JIT for recursive functions with type-hints

Improved support for "context threading" (not enabled).

This technique uses CPU Register Address Stack for return branch predicion and give 25% improvement on some call intensive micro-becnh

Improved support for "context threading" (not enabled).

This technique uses CPU Register Address Stack for return branch predicion and give 25% improvement on some call intensive micro-becnhmarks. Unfotrunately, it also slow downs other recursive benchmarks (probably because of RAS size). The techniquea is not compatible with VM without register variables.

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Avoid code duplication

Mark zend_jit_print_regset as unused

This is a debugging function, so it's usually not going to be used
and we don't want to see a warning about that.

Eliminated unreachable jumps

Don't split basic block after RECV, if function checks type hints

Fixed a typo

Avoid code generation for BB with single VM instruction

jump optimization

Fixed crash

Avoid useless code generation for RECV opcodes

JIT code improvement for ocache.jit=1 (IP consistency)

Improve JIT code for smart branches

Avoid generation of dead jumps

Use Zend MM for JIT temporary buffres allocation

Added JIT compiler for x86 and x86_64