diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 906c54194d94..a41b64ffcc81 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -72,7 +72,6 @@
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
@@ -82,7 +81,6 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
-#include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <cassert>
@@ -828,18 +826,6 @@ static bool isAddrSpaceMapManglingEnabled(const TargetInfo &TI,
   llvm_unreachable("getAddressSpaceMapMangling() doesn't cover anything.");
 }
 
-static std::vector<std::string>
-getRealPaths(llvm::vfs::FileSystem &VFS, llvm::ArrayRef<std::string> Paths) {
-  std::vector<std::string> Result;
-  llvm::SmallString<128> Buffer;
-  for (const auto &File : Paths) {
-    if (std::error_code EC = VFS.getRealPath(File, Buffer))
-      llvm::report_fatal_error("can't open file '" + File + "': " + EC.message());
-    Result.push_back(Buffer.str());
-  }
-  return Result;
-}
-
 ASTContext::ASTContext(LangOptions &LOpts, SourceManager &SM,
                        IdentifierTable &idents, SelectorTable &sels,
                        Builtin::Context &builtins)
@@ -847,10 +833,7 @@ ASTContext::ASTContext(LangOptions &LOpts, SourceManager &SM,
       TemplateSpecializationTypes(this_()),
       DependentTemplateSpecializationTypes(this_()),
       SubstTemplateTemplateParmPacks(this_()), SourceMgr(SM), LangOpts(LOpts),
-      SanitizerBL(new SanitizerBlacklist(
-          getRealPaths(SM.getFileManager().getVirtualFileSystem(),
-                       LangOpts.SanitizerBlacklistFiles),
-          SM)),
+      SanitizerBL(new SanitizerBlacklist(LangOpts.SanitizerBlacklistFiles, SM)),
       XRayFilter(new XRayFunctionFilter(LangOpts.XRayAlwaysInstrumentFiles,
                                         LangOpts.XRayNeverInstrumentFiles,
                                         LangOpts.XRayAttrListFiles, SM)),
diff --git a/clang/test/CodeGen/Inputs/sanitizer-blacklist-vfsoverlay.yaml b/clang/test/CodeGen/Inputs/sanitizer-blacklist-vfsoverlay.yaml
deleted file mode 100644
index df2b22189769..000000000000
--- a/clang/test/CodeGen/Inputs/sanitizer-blacklist-vfsoverlay.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  'version': 0,
-  'roots': [
-    { 'name': '@DIR@', 'type': 'directory',
-      'contents': [
-        { 'name': 'only-virtual-file.blacklist', 'type': 'file',
-          'external-contents': '@REAL_FILE@'
-        },
-        { 'name': 'invalid-virtual-file.blacklist', 'type': 'file',
-          'external-contents': '@NONEXISTENT_FILE@'
-        }
-      ]
-    }
-  ]
-}
diff --git a/clang/test/CodeGen/ubsan-blacklist.c b/clang/test/CodeGen/ubsan-blacklist.c
index d6b4b7143148..666003bd9233 100644
--- a/clang/test/CodeGen/ubsan-blacklist.c
+++ b/clang/test/CodeGen/ubsan-blacklist.c
@@ -5,17 +5,6 @@
 // RUN: %clang_cc1 -fsanitize=unsigned-integer-overflow -fsanitize-blacklist=%t-func.blacklist -emit-llvm %s -o - | FileCheck %s --check-prefix=FUNC
 // RUN: %clang_cc1 -fsanitize=unsigned-integer-overflow -fsanitize-blacklist=%t-file.blacklist -emit-llvm %s -o - | FileCheck %s --check-prefix=FILE
 
-// RUN: rm -f %t-vfsoverlay.yaml
-// RUN: rm -f %t-nonexistent.blacklist
-// RUN: sed -e "s|@DIR@|%T|g" %S/Inputs/sanitizer-blacklist-vfsoverlay.yaml | sed -e "s|@REAL_FILE@|%t-func.blacklist|g" | sed -e "s|@NONEXISTENT_FILE@|%t-nonexistent.blacklist|g" > %t-vfsoverlay.yaml
-// RUN: %clang_cc1 -fsanitize=unsigned-integer-overflow -ivfsoverlay %t-vfsoverlay.yaml -fsanitize-blacklist=%T/only-virtual-file.blacklist -emit-llvm %s -o - | FileCheck %s --check-prefix=FUNC
-
-// RUN: not %clang_cc1 -fsanitize=unsigned-integer-overflow -ivfsoverlay %t-vfsoverlay.yaml -fsanitize-blacklist=%T/invalid-virtual-file.blacklist -emit-llvm %s -o - 2>&1 | FileCheck %s --check-prefix=INVALID-MAPPED-FILE
-// INVALID-MAPPED-FILE: invalid-virtual-file.blacklist': No such file or directory
-
-// RUN: not %clang_cc1 -fsanitize=unsigned-integer-overflow -ivfsoverlay %t-vfsoverlay.yaml -fsanitize-blacklist=%t-nonexistent.blacklist -emit-llvm %s -o - 2>&1 | FileCheck %s --check-prefix=INVALID
-// INVALID: nonexistent.blacklist': No such file or directory
-
 unsigned i;
 
 // DEFAULT: @hash