Index: ELF/LinkerScript.cpp
===================================================================
--- ELF/LinkerScript.cpp
+++ ELF/LinkerScript.cpp
@@ -513,6 +513,11 @@
           s->alignment = subalign;
       }
 
+      // Set the partition field as what OutputSection::recordSection() does.
+      // Partitions cannot be used with the SECTIONS command, so this is always
+      // 1.
+      sec->partition = 1;
+
       sec->sectionIndex = i++;
     }
   }
Index: test/ELF/linkerscript/dynamic.s
===================================================================
--- test/ELF/linkerscript/dynamic.s
+++ test/ELF/linkerscript/dynamic.s
@@ -1,9 +1,13 @@
 # REQUIRES: x86
+
+## Test that DT_INIT_ARRAYSZ/DT_FINI_ARRAYSZ/DT_PREINIT_ARRAYSZ are computed
+## correctly, no matter their associated sections are orphans or not.
+
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1.o
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/shared.s -o %t2.o
-# RUN: ld.lld -shared %t2.o -o %t2.so
+# RUN: ld.lld -shared %t2.o -soname=so -o %t2.so
 
-# RUN: echo "SECTIONS { }" > %t.script
+# RUN: echo "SECTIONS { .init_array : { *(.init_array} } }" > %t.script
 # RUN: ld.lld %t1.o %t2.so -o %t
 # RUN: llvm-readobj --dynamic-table %t | FileCheck %s