Index: lld/trunk/ELF/LinkerScript.h
===================================================================
--- lld/trunk/ELF/LinkerScript.h
+++ lld/trunk/ELF/LinkerScript.h
@@ -95,7 +95,7 @@
   ConstraintKind Constraint = ConstraintKind::NoConstraint;
 };
 
-enum SortKind { SortNone, SortByName, SortByAlignment };
+enum SortKind { SortNone, SortByPriority, SortByName, SortByAlignment };
 
 struct InputSectionDescription : BaseCommand {
   InputSectionDescription(StringRef FilePattern)
Index: lld/trunk/ELF/LinkerScript.cpp
===================================================================
--- lld/trunk/ELF/LinkerScript.cpp
+++ lld/trunk/ELF/LinkerScript.cpp
@@ -110,6 +110,10 @@
          !const_cast<Regex &>(Desc->ExcludedFileRe).match(Filename);
 }
 
+static bool comparePriority(InputSectionData *A, InputSectionData *B) {
+  return getPriority(A->Name) < getPriority(B->Name);
+}
+
 static bool compareName(InputSectionData *A, InputSectionData *B) {
   return A->Name < B->Name;
 }
@@ -123,6 +127,8 @@
 
 static std::function<bool(InputSectionData *, InputSectionData *)>
 getComparator(SortKind K) {
+  if (K == SortByPriority)
+    return comparePriority;
   if (K == SortByName)
     return compareName;
   return compareAlignment;
@@ -967,6 +973,8 @@
     return SortByName;
   if (skip("SORT_BY_ALIGNMENT"))
     return SortByAlignment;
+  if (skip("SORT_BY_INIT_PRIORITY"))
+    return SortByPriority;
   return SortNone;
 }
 
Index: lld/trunk/ELF/OutputSections.cpp
===================================================================
--- lld/trunk/ELF/OutputSections.cpp
+++ lld/trunk/ELF/OutputSections.cpp
@@ -895,19 +895,6 @@
   this->updateAlignment(S->Alignment);
 }
 
-// If an input string is in the form of "foo.N" where N is a number,
-// return N. Otherwise, returns 65536, which is one greater than the
-// lowest priority.
-static int getPriority(StringRef S) {
-  size_t Pos = S.rfind('.');
-  if (Pos == StringRef::npos)
-    return 65536;
-  int V;
-  if (S.substr(Pos + 1).getAsInteger(10, V))
-    return 65536;
-  return V;
-}
-
 // This function is called after we sort input sections
 // and scan relocations to setup sections' offsets.
 template <class ELFT> void OutputSection<ELFT>::assignOffsets() {
Index: lld/trunk/ELF/Strings.h
===================================================================
--- lld/trunk/ELF/Strings.h
+++ lld/trunk/ELF/Strings.h
@@ -17,6 +17,7 @@
 namespace lld {
 namespace elf {
 llvm::Regex compileGlobPatterns(ArrayRef<StringRef> V);
+int getPriority(StringRef S);
 bool hasWildcard(StringRef S);
 std::vector<uint8_t> parseHex(StringRef S);
 bool isValidCIdentifier(StringRef S);
Index: lld/trunk/ELF/Strings.cpp
===================================================================
--- lld/trunk/ELF/Strings.cpp
+++ lld/trunk/ELF/Strings.cpp
@@ -20,6 +20,19 @@
 using namespace lld;
 using namespace lld::elf;
 
+// If an input string is in the form of "foo.N" where N is a number,
+// return N. Otherwise, returns 65536, which is one greater than the
+// lowest priority.
+int elf::getPriority(StringRef S) {
+  size_t Pos = S.rfind('.');
+  if (Pos == StringRef::npos)
+    return 65536;
+  int V;
+  if (S.substr(Pos + 1).getAsInteger(10, V))
+    return 65536;
+  return V;
+}
+
 bool elf::hasWildcard(StringRef S) {
   return S.find_first_of("?*[") != StringRef::npos;
 }
Index: lld/trunk/test/ELF/linkerscript/sort-init.s
===================================================================
--- lld/trunk/test/ELF/linkerscript/sort-init.s
+++ lld/trunk/test/ELF/linkerscript/sort-init.s
@@ -0,0 +1,24 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1.o
+# RUN: echo "SECTIONS { .init_array : { *(SORT_BY_INIT_PRIORITY(.init_array.*)) } }" > %t1.script
+# RUN: ld.lld --script %t1.script %t1.o -o %t2
+# RUN: llvm-objdump -s %t2 | FileCheck %s
+
+# CHECK:      Contents of section .init_array:
+# CHECK-NEXT: 03020000 00000000 010405
+
+.globl _start
+_start:
+  nop
+
+.section .init_array, "aw", @init_array
+  .align 8
+  .byte 1
+.section .init_array.100, "aw", @init_array
+  .long 2
+.section .init_array.5, "aw", @init_array
+  .byte 3
+.section .init_array, "aw", @init_array
+  .byte 4
+.section .init_array, "aw", @init_array
+  .byte 5