Index: ELF/Options.td
===================================================================
--- ELF/Options.td
+++ ELF/Options.td
@@ -306,6 +306,7 @@
 def alias_rpath_rpath: J<"rpath=">, Alias<rpath>;
 def alias_script_T: JoinedOrSeparate<["-"], "T">, Alias<script>;
 def alias_shared_Bshareable: F<"Bshareable">, Alias<shared>;
+def alias_shared_G: F<"G">, Alias<shared>;
 def alias_soname_h: JoinedOrSeparate<["-"], "h">, Alias<soname>;
 def alias_soname_soname: S<"soname">, Alias<soname>;
 def alias_sort_section: J<"sort-section=">, Alias<sort_section>;
@@ -366,7 +367,6 @@
 def warn_shared_textrel: F<"warn-shared-textrel">;
 def EB : F<"EB">;
 def EL : F<"EL">;
-def G: JoinedOrSeparate<["-"], "G">;
 def Qy : F<"Qy">;
 
 // Aliases for ignored options
Index: test/ELF/g-is-shared.s
===================================================================
--- /dev/null
+++ test/ELF/g-is-shared.s
@@ -0,0 +1,8 @@
+# REQUIRES: x86
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+
+# The -G option without any value is equivalent to -shared.
+# RUN: ld.lld -G %t.o -o %t.so
+# RUN: llvm-readobj -file-headers %t.so | FileCheck %s
+# CHECK: Type: SharedObject