[llvm] [DWARF] Refactor findDebugNamesOffsets (PR #88064)

[Fangrui Song via llvm-commits]

================
@@ -552,31 +552,22 @@ DWARFDebugNames::NameIndex::extractAbbrev(uint64_t *Offset) {
   return Abbrev(Code, dwarf::Tag(Tag), AbbrevOffset, std::move(*AttrEncOr));
 }
 
-void llvm::findDebugNamesOffsets(
-    DWARFDebugNames::DWARFDebugNamesOffsets &Offsets, uint64_t HdrSize,
-    dwarf::DwarfFormat Format, const DWARFDebugNames::Header &Hdr) {
-  uint32_t DwarfSize = (Format == llvm::dwarf::DwarfFormat::DWARF64) ? 8 : 4;
-  uint64_t Offset = HdrSize;
-  Offsets.CUsBase = Offset;
-  Offset += Hdr.CompUnitCount * DwarfSize;
-  Offset += Hdr.LocalTypeUnitCount * DwarfSize;
-  Offset += Hdr.ForeignTypeUnitCount * 8;
-
-  Offsets.BucketsBase = Offset;
-  Offset += Hdr.BucketCount * 4;
-
-  Offsets.HashesBase = Offset;
-  if (Hdr.BucketCount > 0)
-    Offset += Hdr.NameCount * 4;
-
-  Offsets.StringOffsetsBase = Offset;
-  Offset += Hdr.NameCount * DwarfSize;
-
-  Offsets.EntryOffsetsBase = Offset;
-  Offset += Hdr.NameCount * DwarfSize;
-
-  Offset += Hdr.AbbrevTableSize;
-  Offsets.EntriesBase = Offset;
+DWARFDebugNames::DWARFDebugNamesOffsets
+dwarf::findDebugNamesOffsets(uint64_t EndOfHeaderOffset,
+                             const DWARFDebugNames::Header &Hdr) {
+  DWARFDebugNames::DWARFDebugNamesOffsets Ret;
+  uint32_t DwarfSize = Hdr.Format == dwarf::DwarfFormat::DWARF64 ? 8 : 4;
----------------
MaskRay wrote:

Thanks. Adopted gerDwarfOffsetByteSize

https://github.com/llvm/llvm-project/pull/88064