Index: lib/CodeGen/TargetInfo.cpp
===================================================================
--- lib/CodeGen/TargetInfo.cpp
+++ lib/CodeGen/TargetInfo.cpp
@@ -1647,6 +1647,15 @@
   }
 };

+static std::string qualifyPSLibrary(llvm::StringRef Lib) {
+  // If the argument contains a space, enclose it in quotes.
+  bool Quote = (Lib.find(" ") != StringRef::npos);
+  std::string ArgStr = Quote ? "\"" : "";
+  ArgStr += Lib;
+  ArgStr += Quote ? "\"" : "";
+  return ArgStr;
+}
+
 class PS4TargetCodeGenInfo : public X86_64TargetCodeGenInfo {
 public:
   PS4TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT, X86AVXABILevel AVXLevel)
@@ -1655,7 +1664,7 @@
   void getDependentLibraryOption(llvm::StringRef Lib,
                                  llvm::SmallString<24> &Opt) const override {
     Opt = "\01";
-    Opt += Lib;
+    Opt += qualifyPSLibrary(Lib);
   }
 };

Index: test/CodeGen/pragma-comment.c
===================================================================
--- test/CodeGen/pragma-comment.c
+++ test/CodeGen/pragma-comment.c
@@ -30,3 +30,4 @@
 // PS4: !{!"\01msvcrt.lib"}
 // PS4: !{!"\01kernel32"}
 // PS4: !{!"\01USER32.LIB"}
+// PS4: !{!"\01\22with space\22"}