[llvm] [offload][SYCL] Add SYCL Module splitting (PR #119713)

[Fraser Cormack via llvm-commits]

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@@ -70,6 +76,64 @@ static cl::opt<std::string>
     MCPU("mcpu", cl::desc("Target CPU, ignored if --mtriple is not used"),
          cl::value_desc("cpu"), cl::cat(SplitCategory));
 
+cl::opt<IRSplitMode> SYCLSplitMode(
+    "sycl-split", cl::desc("module split mode"), cl::Optional,
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frasercrmck wrote:

I think the `cl::desc` here could be more human-friendly, like the other options in the same file. It should start with a capital letter, and might be best if it specifically mentions `SYCL` in the description, too.

Shouldn't the options be `static`?

https://github.com/llvm/llvm-project/pull/119713