[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] Use std::allocator calls for Descriptor source (#123900)

... for the dynamic blocks created for operator new calls. This way we
get the type of memory allocated right. As a side-ef

[clang][bytecode] Use std::allocator calls for Descriptor source (#123900)

... for the dynamic blocks created for operator new calls. This way we
get the type of memory allocated right. As a side-effect, the
diagnostics now point to the std::allocator calls, which is an
improvement.

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Factor common code for quoting a builtin name (#120835)

This shows up in several places in order to match the quoting of other
uses of the same diagnostic. Handling it centrally simplifies the code

Factor common code for quoting a builtin name (#120835)

This shows up in several places in order to match the quoting of other
uses of the same diagnostic. Handling it centrally simplifies the code
and reduces changes if the storage for builtin names changes.

This refactoring is extracted out of #120534 as requested in code
review.

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[clang][bytecode] Always return false for invalid bcp results (#121467)

[clang][bytecode] Consider unknown-size arrays in memcpy/memcmp (#121462)

When emitting diagnostics for the number of elements.

[clang][bytecode] Check for memcpy/memmove dummy pointers earlier (#121453)

[clang][bytecode] Check memove/memcpy for available elements (#121383)

Both destination and source pointer need to have at least as many
elements as requested.

[clang][bytecode] Support pointers in __builtin_mem{move,cpy} (#120560)

Unfortunately, that means we can't use the __builtin_bit_cast
implementation for this.

[clang][bytecode] Handle builtin_wmemcmp (#120070)

[clang][bytecode] Fix memcmp/bcmp failures on big-endian hosts (#119851)

See the discussion in

https://github.com/llvm/llvm-project/pull/119678#issuecomment-2539680746
and
https://github.com/llvm/l

[clang][bytecode] Fix memcmp/bcmp failures on big-endian hosts (#119851)

See the discussion in

https://github.com/llvm/llvm-project/pull/119678#issuecomment-2539680746
and
https://github.com/llvm/llvm-project/pull/119544#issuecomment-2539678561

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[clang][bytecode] Handle __builtin_bcmp (#119678)

... the same as `__builtin_memcmp`. Also fix a bug we still had when we
couldn't find a difference in the two inputs after `Size` bytes.

[clang][bytecode] Fix a build failure on aarch64

This broke e.g.
https://lab.llvm.org/buildbot/#/builders/190/builds/11216

[clang][bytecode] Handle __builtin_memcmp (#119544)

[clang][bytecode][NFC] Use Pointer::pointToSameBlock (#119552)

block() requires the pointer to be a block pointer.

[clang][bytecode] Check for overlapping memcpy regions (#119535)

[clang][bytecode] Reject memcpy sizes with element size remainder (#119209)

[clang][bytecode] Handle __builtin_strncmp (#119208)

[clang] Fix -Wunused-variable in InterpBuiltin.cpp (NFC)

/llvm-project/clang/lib/AST/ByteCode/InterpBuiltin.cpp:262:23:
error: unused variable 'AC' [-Werror,-Wunused-variable]
const ASTContext &

[clang] Fix -Wunused-variable in InterpBuiltin.cpp (NFC)

/llvm-project/clang/lib/AST/ByteCode/InterpBuiltin.cpp:262:23:
error: unused variable 'AC' [-Werror,-Wunused-variable]
const ASTContext &AC = S.getASTContext();
^
1 error generated.

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[clang][bytecode] Handle __builtin_wcslen (#119187)

Handle different char widths in builtin_strlen.

[clang][bytecode] Pass __builtin_memcpy size along (#118649)

To DoBitCastPtr, so we know how many bytes we want to read.

Revert "[clang][bytecode] Handle __builtin_wcslen (#118446)"

This reverts commit 89a0ee89973c3d213c4bc11c26b41eab67e06da0.

This breaks builders:
https://lab.llvm.org/buildbot/#/builders/13/builds/3

Revert "[clang][bytecode] Handle __builtin_wcslen (#118446)"

This reverts commit 89a0ee89973c3d213c4bc11c26b41eab67e06da0.

This breaks builders:
https://lab.llvm.org/buildbot/#/builders/13/builds/3885

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[clang][bytecode] Reject memcpy dummy pointers after null check (#118460)

To match the diagnostic output of the current interpreter.

[clang][bytecode] Initialize elements in __builtin_elementwise_popcount (#118457)

[clang][bytecode] Handle __builtin_wcslen (#118446)

... just like strlen.

[clang][bytecode][NFC] Diagnose non-constexpr builtin strcmp calls (#118442)