From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 20 Dec 2019 19:53:05 +0000
Subject: Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.
---
 .../llvm-project/llvm/lib/MC/MCObjectWriter.cpp    | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 contrib/llvm-project/llvm/lib/MC/MCObjectWriter.cpp

(limited to 'contrib/llvm-project/llvm/lib/MC/MCObjectWriter.cpp')

diff --git a/contrib/llvm-project/llvm/lib/MC/MCObjectWriter.cpp b/contrib/llvm-project/llvm/lib/MC/MCObjectWriter.cpp
new file mode 100644
index 000000000000..a058bbe0ba0b
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/MC/MCObjectWriter.cpp
@@ -0,0 +1,52 @@
+//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCFragment.h"
+#include "llvm/MC/MCSymbol.h"
+
+using namespace llvm;
+
+MCObjectWriter::~MCObjectWriter() = default;
+
+bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
+    const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
+    bool InSet) const {
+  // Modified symbol references cannot be resolved.
+  if (A->getKind() != MCSymbolRefExpr::VK_None ||
+      B->getKind() != MCSymbolRefExpr::VK_None)
+    return false;
+
+  const MCSymbol &SA = A->getSymbol();
+  const MCSymbol &SB = B->getSymbol();
+  if (SA.isUndefined() || SB.isUndefined())
+    return false;
+
+  if (!SA.getFragment() || !SB.getFragment())
+    return false;
+
+  return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, SB, InSet);
+}
+
+bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
+    const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B,
+    bool InSet) const {
+  return isSymbolRefDifferenceFullyResolvedImpl(Asm, A, *B.getFragment(), InSet,
+                                                false);
+}
+
+bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
+    const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
+    bool InSet, bool IsPCRel) const {
+  const MCSection &SecA = SymA.getSection();
+  const MCSection &SecB = *FB.getParent();
+  // On ELF and COFF  A - B is absolute if A and B are in the same section.
+  return &SecA == &SecB;
+}
-- 
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