Zhaoxin Yang 20b442a25d [Flang][LoongArch] Add support for complex16 params/returns. (#114732) ...

In LoongArch64, the passing and returning of type `complex16` is similar
to that of structure type like `struct {fp128, fp128}`, meaning they are
passed and returned by reference. This behavior is similar to clang, so
it can implement conveniently `iso_c_binding`.

Additionally, this patch fixes the failure in flang test
Integration/debug-complex-1.f90:
```
llvm-project/flang/lib/Optimizer/codeGen/Target.cpp:56:
not yet implemented: complex for this precision for return type

2024-11-13 16:13:37 +08:00

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