From 5a5c549fe9a3fef595297bd21d36bed8409dc37d Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 30 Dec 2015 11:57:38 +0000
Subject: Vendor import of lld trunk r256633:
 https://llvm.org/svn/llvm-project/lld/trunk@256633

---
 lib/ReaderWriter/CoreLinkingContext.cpp | 135 ++------------------------------
 1 file changed, 7 insertions(+), 128 deletions(-)

(limited to 'lib/ReaderWriter/CoreLinkingContext.cpp')

diff --git a/lib/ReaderWriter/CoreLinkingContext.cpp b/lib/ReaderWriter/CoreLinkingContext.cpp
index 86fad4f6e77d..02f6263c0c3f 100644
--- a/lib/ReaderWriter/CoreLinkingContext.cpp
+++ b/lib/ReaderWriter/CoreLinkingContext.cpp
@@ -14,139 +14,19 @@
 #include "lld/Core/Simple.h"
 #include "lld/ReaderWriter/CoreLinkingContext.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
 
 using namespace lld;
 
 namespace {
 
-/// \brief Simple atom created by the stubs pass.
-class TestingStubAtom : public DefinedAtom {
-public:
-  TestingStubAtom(const File &F, const Atom &) : _file(F) {
-    static uint32_t lastOrdinal = 0;
-    _ordinal = lastOrdinal++;
-  }
-
-  const File &file() const override { return _file; }
-
-  StringRef name() const override { return StringRef(); }
-
-  uint64_t ordinal() const override { return _ordinal; }
-
-  uint64_t size() const override { return 0; }
-
-  Scope scope() const override { return DefinedAtom::scopeLinkageUnit; }
-
-  Interposable interposable() const override { return DefinedAtom::interposeNo; }
-
-  Merge merge() const override { return DefinedAtom::mergeNo; }
-
-  ContentType contentType() const override { return DefinedAtom::typeStub; }
-
-  Alignment alignment() const override { return Alignment(0, 0); }
-
-  SectionChoice sectionChoice() const override {
-    return DefinedAtom::sectionBasedOnContent;
-  }
-
-  StringRef customSectionName() const override { return StringRef(); }
-
-  DeadStripKind deadStrip() const override {
-    return DefinedAtom::deadStripNormal;
-  }
-
-  ContentPermissions permissions() const override {
-    return DefinedAtom::permR_X;
-  }
-
-  ArrayRef<uint8_t> rawContent() const override { return ArrayRef<uint8_t>(); }
-
-  reference_iterator begin() const override {
-    return reference_iterator(*this, nullptr);
-  }
-
-  reference_iterator end() const override {
-    return reference_iterator(*this, nullptr);
-  }
-
-  const Reference *derefIterator(const void *iter) const override {
-    return nullptr;
-  }
-
-  void incrementIterator(const void *&iter) const override {}
-
-private:
-  const File &_file;
-  uint32_t _ordinal;
-};
-
-/// \brief Simple atom created by the GOT pass.
-class TestingGOTAtom : public DefinedAtom {
-public:
-  TestingGOTAtom(const File &F, const Atom &) : _file(F) {
-    static uint32_t lastOrdinal = 0;
-    _ordinal = lastOrdinal++;
-  }
-
-  const File &file() const override { return _file; }
-
-  StringRef name() const override { return StringRef(); }
-
-  uint64_t ordinal() const override { return _ordinal; }
-
-  uint64_t size() const override { return 0; }
-
-  Scope scope() const override { return DefinedAtom::scopeLinkageUnit; }
-
-  Interposable interposable() const override { return DefinedAtom::interposeNo; }
-
-  Merge merge() const override { return DefinedAtom::mergeNo; }
-
-  ContentType contentType() const override { return DefinedAtom::typeGOT; }
-
-  Alignment alignment() const override { return Alignment(3, 0); }
-
-  SectionChoice sectionChoice() const override {
-    return DefinedAtom::sectionBasedOnContent;
-  }
-
-  StringRef customSectionName() const override { return StringRef(); }
-
-  DeadStripKind deadStrip() const override {
-    return DefinedAtom::deadStripNormal;
-  }
-
-  ContentPermissions permissions() const override {
-    return DefinedAtom::permRW_;
-  }
-
-  ArrayRef<uint8_t> rawContent() const override { return ArrayRef<uint8_t>(); }
-
-  reference_iterator begin() const override {
-    return reference_iterator(*this, nullptr);
-  }
-
-  reference_iterator end() const override {
-    return reference_iterator(*this, nullptr);
-  }
-
-  const Reference *derefIterator(const void *iter) const override {
-    return nullptr;
-  }
-
-  void incrementIterator(const void *&iter) const override {}
-
-private:
-  const File &_file;
-  uint32_t _ordinal;
-};
-
 class OrderPass : public Pass {
 public:
   /// Sorts atoms by position
-  void perform(std::unique_ptr<MutableFile> &file) override {
-    MutableFile::DefinedAtomRange defined = file->definedAtoms();
+  std::error_code perform(SimpleFile &file) override {
+    SimpleFile::DefinedAtomRange defined = file.definedAtoms();
     std::sort(defined.begin(), defined.end(), DefinedAtom::compareByPosition);
+    return std::error_code();
   }
 };
 
@@ -161,10 +41,9 @@ bool CoreLinkingContext::validateImpl(raw_ostream &) {
 
 void CoreLinkingContext::addPasses(PassManager &pm) {
   for (StringRef name : _passNames) {
-    if (name.equals("order"))
-      pm.add(std::unique_ptr<Pass>(new OrderPass()));
-    else
-      llvm_unreachable("bad pass name");
+    (void)name;
+    assert(name == "order" && "bad pass name");
+    pm.add(llvm::make_unique<OrderPass>());
   }
 }
 
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