[PDB/CodeView] Read/write codeview inlinee line information.

Previously we wrote line information and file checksum
information, but we did not write information about inlinee
lines and functions.  This patch adds support for that.

llvm-svn: 301936

llvm/lib/DebugInfo/CodeView/ModuleDebugFileChecksumFragment.cpp

@@ -68,7 +68,10 @@ void ModuleDebugFileChecksumFragment::addChecksum(uint32_t StringTableOffset,
   // This maps the offset of this string in the string table to the offset
   // of this checksum entry in the checksum buffer.
   OffsetMap[StringTableOffset] = SerializedSize;
-  SerializedSize += sizeof(FileChecksumEntryHeader) + Bytes.size();
+  assert(SerializedSize % 4 == 0);
+
+  uint32_t Len = alignTo(sizeof(FileChecksumEntryHeader) + Bytes.size(), 4);
+  SerializedSize += Len;
 }
 
 uint32_t ModuleDebugFileChecksumFragment::calculateSerializedLength() {
@@ -85,6 +88,8 @@ Error ModuleDebugFileChecksumFragment::commit(BinaryStreamWriter &Writer) {
       return EC;
     if (auto EC = Writer.writeArray(makeArrayRef(FC.Checksum)))
       return EC;
+    if (auto EC = Writer.padToAlignment(4))
+      return EC;
   }
   return Error::success();
 }