[llvm] Introduce LDBG_OS() macro as a variant of LDBG() (PR #157194)

[Jacques Pienaar via llvm-commits]

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@@ -173,17 +344,17 @@ getShortFileName(const char *path) {
 /// "[DebugType] File:Line "
 /// Where the File is the file name without the path prefix.
 static LLVM_ATTRIBUTE_UNUSED std::string
-computePrefix(const char *DebugType, const char *File, int Line, int Level) {
+computePrefix(StringRef DebugType, const char *File, int Line, int Level) {
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jpienaar wrote:

How important is this change? (E.g, StringRef vs const char*)

https://github.com/llvm/llvm-project/pull/157194