[llvm] [llvm][Dwarf] Add LanguageDescription API that accounts for version (PR #162048)

[Michael Buch via llvm-commits]

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@@ -472,6 +472,117 @@ StringRef llvm::dwarf::LanguageDescription(dwarf::SourceLanguageName lname) {
   return "Unknown";
 }
 
+StringRef llvm::dwarf::LanguageDescription(dwarf::SourceLanguageName Name,
+                                           uint32_t Version) {
+  switch (Name) {
+  // YYYY
+  case DW_LNAME_Ada: {
+    if (Version <= 1983)
+      return "Ada 83";
+    if (Version <= 1995)
+      return "Ada 95";
+    if (Version <= 2005)
+      return "Ada 2005";
+    if (Version <= 2012)
+      return "Ada 2012";
----------------
Michael137 wrote:

Added unittests in latest commit.

Yea those intermediate values haven't really been specified i think. I took inspiration from the logic in:
https://github.com/llvm/llvm-project/blob/c2765b74ed2bb71bebe96c7dd49f69ade714e5a8/llvm/include/llvm/BinaryFormat/Dwarf.h#L228-L273

There we round up the intermediate version number. Reading https://dwarfstd.org/languages-v6.html, it sounds like the version number specifies the completion of a particular language version. Anything after that is the next version. At least that's how I think about this

https://github.com/llvm/llvm-project/pull/162048