[all-commits] [llvm/llvm-project] 534e2d: [Clang][Interp] Visit `DecompositionDecl` and crea...

[yronglin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 534e2dd29f252cc13b94312895d2f4b39b54b9d4
      https://github.com/llvm/llvm-project/commit/534e2dd29f252cc13b94312895d2f4b39b54b9d4
  Author: yronglin <yronglin777 at gmail.com>
  Date:   2024-07-25 (Thu, 25 Jul 2024)

  Changed paths:
    M clang/lib/AST/Interp/Compiler.cpp
    M clang/test/SemaCXX/cxx1z-decomposition.cpp

  Log Message:
  -----------
  [Clang][Interp] Visit `DecompositionDecl` and create a local variable (#100400)

The following code should be well-formed:
```C++
float decompose_complex(_Complex float cf) {
  static _Complex float scf;
  auto &[sre, sim] = scf;
  // ok, this is references initialized by constant expressions all the way down
  static_assert(&sre == &__real scf);
  static_assert(&sim == &__imag scf);

  auto [re, im] = cf;
  return re*re + im*im;
}

```
We should visit `DecompositionDecl` and create a local variable but not
a create a dummy value directly.

---------

Signed-off-by: yronglin <yronglin777 at gmail.com>



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