From 0ab9d8b6edd527173305abe48958bd566dc2e257 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed, 6 Dec 2017 19:13:23 +0000
Subject: [PATCH] Add an early return.

Total memory allocation when linking clang goes from 281.80MB to
270.96MB.

llvm-svn: 319930
---
 lld/ELF/LinkerScript.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 7db282bdb721..f301afc40317 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -184,6 +184,8 @@ static std::string getFilename(InputFile *File) {
 }
 
 bool LinkerScript::shouldKeep(InputSectionBase *S) {
+  if (KeptSections.empty())
+    return false;
   std::string Filename = getFilename(S->File);
   for (InputSectionDescription *ID : KeptSections)
     if (ID->FilePat.match(Filename))
-- 
2.34.1