From 044eb2f6afba375a914ac9d8024f8f5142bb912e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:10:56 +0000
Subject: Vendor import of llvm trunk r321017:
 https://llvm.org/svn/llvm-project/llvm/trunk@321017

---
 lib/Object/ELFObjectFile.cpp | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

(limited to 'lib/Object/ELFObjectFile.cpp')

diff --git a/lib/Object/ELFObjectFile.cpp b/lib/Object/ELFObjectFile.cpp
index fa136d782b5aa..0aad1c89a2d8b 100644
--- a/lib/Object/ELFObjectFile.cpp
+++ b/lib/Object/ELFObjectFile.cpp
@@ -37,7 +37,16 @@ using namespace object;
 ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)
     : ObjectFile(Type, Source) {}
 
-ErrorOr<std::unique_ptr<ObjectFile>>
+template <class ELFT>
+static Expected<std::unique_ptr<ELFObjectFile<ELFT>>>
+createPtr(MemoryBufferRef Object) {
+  auto Ret = ELFObjectFile<ELFT>::create(Object);
+  if (Error E = Ret.takeError())
+    return std::move(E);
+  return make_unique<ELFObjectFile<ELFT>>(std::move(*Ret));
+}
+
+Expected<std::unique_ptr<ObjectFile>>
 ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {
   std::pair<unsigned char, unsigned char> Ident =
       getElfArchType(Obj.getBuffer());
@@ -45,31 +54,24 @@ ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {
       1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart()));
 
   if (MaxAlignment < 2)
-    return object_error::parse_failed;
+    return createError("Insufficient alignment");
 
-  std::error_code EC;
-  std::unique_ptr<ObjectFile> R;
   if (Ident.first == ELF::ELFCLASS32) {
     if (Ident.second == ELF::ELFDATA2LSB)
-      R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC));
+      return createPtr<ELF32LE>(Obj);
     else if (Ident.second == ELF::ELFDATA2MSB)
-      R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC));
+      return createPtr<ELF32BE>(Obj);
     else
-      return object_error::parse_failed;
+      return createError("Invalid ELF data");
   } else if (Ident.first == ELF::ELFCLASS64) {
     if (Ident.second == ELF::ELFDATA2LSB)
-      R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC));
+      return createPtr<ELF64LE>(Obj);
     else if (Ident.second == ELF::ELFDATA2MSB)
-      R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC));
+      return createPtr<ELF64BE>(Obj);
     else
-      return object_error::parse_failed;
-  } else {
-    return object_error::parse_failed;
+      return createError("Invalid ELF data");
   }
-
-  if (EC)
-    return EC;
-  return std::move(R);
+  return createError("Invalid ELF class");
 }
 
 SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const {
@@ -260,8 +262,7 @@ void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const {
 
   std::string Triple;
   // Default to ARM, but use the triple if it's been set.
-  if (TheTriple.getArch() == Triple::thumb ||
-      TheTriple.getArch() == Triple::thumbeb)
+  if (TheTriple.isThumb())
     Triple = "thumb";
   else
     Triple = "arm";
-- 
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