[lld] r321458 - Add a comment about subtracting two non abs symbols. NFC.

[Rafael Espindola via llvm-commits]

Author: rafael
Date: Tue Dec 26 10:11:14 2017
New Revision: 321458

URL: http://llvm.org/viewvc/llvm-project?rev=321458&view=rev
Log:
Add a comment about subtracting two non abs symbols. NFC.

Modified:
    lld/trunk/ELF/ScriptParser.cpp

Modified: lld/trunk/ELF/ScriptParser.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/ScriptParser.cpp?rev=321458&r1=321457&r2=321458&view=diff
==============================================================================
--- lld/trunk/ELF/ScriptParser.cpp (original)
+++ lld/trunk/ELF/ScriptParser.cpp Tue Dec 26 10:11:14 2017
@@ -151,6 +151,7 @@ static ExprValue add(ExprValue A, ExprVa
 }
 
 static ExprValue sub(ExprValue A, ExprValue B) {
+  // The distance between two symbols in sections is absolute.
   if (!A.isAbsolute() && !B.isAbsolute())
     return A.getValue() - B.getValue();
   return {A.Sec, false, A.getSectionOffset() - B.getValue(), A.Loc};