[ELF][MIPS] Add comments to describe __gnu_local_gp magic symbol
NFC. Follow-up to r259781.
llvm-svn: 260027
diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 20a1dfb..2c362e7 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -397,8 +397,9 @@
// linking only.
continue;
if (Body == Config->MipsGpDisp || Body == Config->MipsLocalGp)
- // MIPS _gp_disp designates offset between start of function and gp
- // pointer into GOT therefore any relocations against it do not require
+ // MIPS _gp_disp designates offset between start of function and 'gp'
+ // pointer into GOT. __gnu_local_gp is equal to the current value of
+ // the 'gp'. Therefore any relocations against them do not require
// dynamic relocation.
continue;
}