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

[Alexey Bader via llvm-commits]

================
@@ -70,6 +76,66 @@ static cl::opt<std::string>
     MCPU("mcpu", cl::desc("Target CPU, ignored if --mtriple is not used"),
          cl::value_desc("cpu"), cl::cat(SplitCategory));
 
+static cl::opt<IRSplitMode> SYCLSplitMode(
+    "sycl-split",
+    cl::desc("SYCL Split Mode. If present, SYCL splitting algorithm is used "
+             "with the specified mode."),
+    cl::Optional, cl::init(IRSplitMode::IRSM_NONE),
+    cl::values(clEnumValN(IRSplitMode::IRSM_PER_TU, "source",
+                          "1 ouptput module per translation unit"),
+               clEnumValN(IRSplitMode::IRSM_PER_KERNEL, "kernel",
+                          "1 output module per kernel")),
+    cl::cat(SplitCategory));
+
+static cl::opt<bool> OutputAssembly{
+    "S", cl::desc("Write output as LLVM assembly"), cl::cat(SplitCategory)};
+
+void writeStringToFile(std::string_view Content, StringRef Path) {
+  std::error_code EC;
+  raw_fd_ostream OS(Path, EC);
+  if (EC) {
+    errs() << formatv("error opening file: {0}\n", Path);
+    exit(1);
+  }
+
+  OS << Content << "\n";
+}
+
+void writeSplitModulesAsTable(ArrayRef<ModuleAndSYCLMetadata> Modules,
+                              StringRef Path) {
+  std::vector<std::string> Columns = {"Code", "Symbols"};
----------------
bader wrote:

Please, use one LLVM's containers instead of `std::vector` (e.g. `SmallVector`).
https://llvm.org/docs/ProgrammersManual.html#llvm-adt-smallvector-h

The same applies to `std::string`. https://llvm.org/docs/ProgrammersManual.html#string-like-containers

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