[clang][bytecode] Fix dummy handling for p2280r4 (#124396)

This makes some other problems show up like the fact that we didn't
suppress diagnostics during __builtin_constant_p evaluation.

[clang][bytecode] Add a missing break

[clang][bytecode] Add support for typeid pointers (#121251)

Add it as another kind of pointer, saving both a `Type*` for the result
of the typeid() expression as well as one for the type of the type

[clang][bytecode] Add support for typeid pointers (#121251)

Add it as another kind of pointer, saving both a `Type*` for the result
of the typeid() expression as well as one for the type of the typeid
expression.

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[clang][bytecode] Move a local variable to a later point (#121250)

We don't need `E` before.

[clang][bytecode] Fix Pointer::toAPValue() for multidimensional arrays (#114400)

When we see an array root, that pointer might yet again be an array
element, so check for that.

[clang][bytecode] Narrow pointer in UO_Deref unary operators (#113089)

Otherwise we treat this like an array element even though we should
treat it as a single object.

[clang][bytecode] Return an lvalue path for dummy pointers (#111862)

Not doing this is wrong in general and we need to reject expressions
where it would matter differently.

[clang][bytecode] Change isArrayElement() for narrowed composite arrays (#111110)

Make isArrayElement() return true here, so we can know that such a
pointer is in fact an array element and handle i

[clang][bytecode] Change isArrayElement() for narrowed composite arrays (#111110)

Make isArrayElement() return true here, so we can know that such a
pointer is in fact an array element and handle it properly in
toAPValue().

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[clang][bytecode] Use field descriptor in IntPointer::atOffset (#109238)

We're otherwise still pointing to the old type, but with the new offset.

[clang][bytecode] Implement base casts on integral pointers (#108340)

Get the right offset to apply from the RecordLayout.

[clang][bytecode] Diagnose comparisons with literals (#106734)

This requires adding a new opcode for PointerToBoolean casts, since we
otherwise emit too many diagnostics. But that fixes an older pr

[clang][bytecode] Diagnose comparisons with literals (#106734)

This requires adding a new opcode for PointerToBoolean casts, since we
otherwise emit too many diagnostics. But that fixes an older problem
when casting weak pointers to bool.

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[clang][bytecode] IntPointer::atOffset() should append (#104686)

... to current offset. This breaks other tests which this commit also
fixes. Namely, getIndex() should return the integer representa

[clang][bytecode] IntPointer::atOffset() should append (#104686)

... to current offset. This breaks other tests which this commit also
fixes. Namely, getIndex() should return the integer representation for
non-block pointers.

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[clang][bytecode][NFC] Improve Pointer::print()

Do not access PointeeStorage.BS.Pointee if we have a non-block pointer
and extend printing to handle function pointers as well.

[clang] Rename all AST/Interp stuff to AST/ByteCode (#104552)

"Interp" clashes with the clang interpreter and people often confuse
this.