[clang] [X86][Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - add AVX512 KTEST/KORTEST intrinsics to be used in constexpr (PR #166103)

[Roberto Turrado Camblor via cfe-commits]

rturrado wrote:

> @rturrado have you been able to investigate the CI crashes?

Hm... weird, `ninja -C build check-lang-codegen-x86` is passing 262 tests for me locally.

But also weird, and it may be related to those CI issues, I'm still getting 2 build warnings locally:

```
[35/72] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/InterpBuiltin.cpp.o
In file included from /home/rturrado/Projects/llvm-project/llvm/include/llvm/ADT/APSInt.h:18,
                 from /home/rturrado/Projects/llvm-project/llvm/include/llvm/ADT/APFixedPoint.h:19,
                 from /home/rturrado/Projects/llvm-project/clang/include/clang/AST/APValue.h:17,
                 from /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/Integral.h:16,
                 from /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/Boolean.h:12,
                 from /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/InterpBuiltin.cpp:9:
In destructor ‘llvm::APInt::~APInt()’,
    inlined from ‘clang::interp::APSInt clang::interp::Boolean::toAPSInt() const’ at /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/Boolean.h:50:19,
    inlined from ‘bool clang::interp::interp__builtin_select(InterpState&, CodePtr, const clang::CallExpr*)’ at /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/InterpBuiltin.cpp:2799:7:
/home/rturrado/Projects/llvm-project/llvm/include/llvm/ADT/APInt.h:192:18: warning: ‘void operator delete [](void*)’ called on a pointer to an unallocated object ‘1’ [-Wfree-nonheap-object]
  192 |       delete[] U.pVal;
      |                  ^~~~
In destructor ‘llvm::APInt::~APInt()’,
    inlined from ‘clang::interp::APSInt clang::interp::Boolean::toAPSInt() const’ at /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/Boolean.h:50:19,
    inlined from ‘bool clang::interp::interp__builtin_select(InterpState&, CodePtr, const clang::CallExpr*)’ at /home/rturrado/Projects/llvm-project/clang/lib/AST/ByteCode/InterpBuiltin.cpp:2799:7:
/home/rturrado/Projects/llvm-project/llvm/include/llvm/ADT/APInt.h:192:18: warning: ‘void operator delete [](void*)’ called on a pointer to an unallocated object ‘1’ [-Wfree-nonheap-object]
  192 |       delete[] U.pVal;
      |                  ^~~~
```

However, the build errors seem to come from `ExprConstant.cpp`. I'm probably returning an `unsigned char` instead of an `unsigned int` or something on those lines. I'll have a look!

https://github.com/llvm/llvm-project/pull/166103