Chuanqi Xu 08f957808e [C++20] [Modules] Don't generate global ctors/dtors for variables which are available externally ...

Closes https://github.com/llvm/llvm-project/issues/59765.

Currently we will generate the global ctor/dtor for variables in
importing modules. It will cause multiple initialization/destructions.
It makes no sense. This patch tries to not generate global ctor/dtor for
variables which are available externally. Note that the variables in
header units and clang modules won't be available externally by default.

Reviewed By: iains

Differential Revision: https://reviews.llvm.org/D140867

2023-01-09 10:48:43 +08:00

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