[CIR] Upstream support for generating global ctor regions (#161298)

This adds support for handling global variables with non-trivial
constructors. The constructor call is emitted in CIR as a 'ctor' region
associated with the global definition. This form of global definition
cannot be lowered to LLVM IR yet.

A later change will add support in LoweringPrepare to move the ctor code
into a __cxx_global_var_init() function and add that function to the
list of global global ctors, but for now we must stop at the initial CIR
generation.

0 files changed, 0 insertions, 0 deletions