[SPIRV][SPIRVPrepareGlobals] Map AMD's dynamic LDS 0-element globals to arrays with UINT32_MAX elements (#166952)

In HIP, dynamic LDS variables are represented using `0-element` global
arrays in the `__shared__` language address-space.

```cpp
  extern __shared__ int LDS[];
```

These are not representable in SPIRV directly.

To represent them, for AMD, we use an array with `UINT32_MAX`-elements.
These are reverse translated to 0-element arrays later in AMD's SPIRV
runtime pipeline (in
[SPIRVReader.cpp](https://github.com/ROCm/SPIRV-LLVM-Translator/blob/8cb74e264ddcde89f62354544803dc8cdbac148d/lib/SPIRV/SPIRVReader.cpp#L358)).

0 files changed, 0 insertions, 0 deletions