[llvm] Reland: [MC] output inlined-at debug info (#106230) (PR #130306)

[Matt Arsenault via llvm-commits]

================
@@ -2057,6 +2057,17 @@ void DwarfDebug::beginInstruction(const MachineInstr *MI) {
     }
   }
 
+  auto RecordSourceLine = [this](auto &DL, auto Flags) {
+    StringRef Comment;
+    if (Asm->OutStreamer->isVerboseAsm()) {
+      SmallString<128> LocationString;
+      raw_svector_ostream OS(LocationString);
+      DL.print(OS);
+      Comment = OS.str();
+    }
----------------
arsenm wrote:

```suggestion
    SmallString<128> LocationString;
    if (Asm->OutStreamer->isVerboseAsm()) {
      raw_svector_ostream OS(LocationString);
      DL.print(OS);
    }
```

https://github.com/llvm/llvm-project/pull/130306