1 files changed, 98 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCAsmInfoDarwin.cpp b/contrib/llvm/lib/MC/MCAsmInfoDarwin.cpp
new file mode 100644
index 000000000000..c74840982fb7
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCAsmInfoDarwin.cpp
@@ -0,0 +1,98 @@
+//===- MCAsmInfoDarwin.cpp - Darwin asm properties ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines target asm properties related what form asm statements
+// should take in general on Darwin-based targets
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCAsmInfoDarwin.h"
+#include "llvm/BinaryFormat/MachO.h"
+#include "llvm/MC/MCDirectives.h"
+#include "llvm/MC/MCSectionMachO.h"
+
+using namespace llvm;
+
+bool MCAsmInfoDarwin::isSectionAtomizableBySymbols(
+    const MCSection &Section) const {
+  const MCSectionMachO &SMO = static_cast<const MCSectionMachO &>(Section);
+
+  // Sections holding 1 byte strings are atomized based on the data they
+  // contain.
+  // Sections holding 2 byte strings require symbols in order to be atomized.
+  // There is no dedicated section for 4 byte strings.
+  if (SMO.getType() == MachO::S_CSTRING_LITERALS)
+    return false;
+
+  if (SMO.getSegmentName() == "__DATA" && SMO.getSectionName() == "__cfstring")
+    return false;
+
+  if (SMO.getSegmentName() == "__DATA" &&
+      SMO.getSectionName() == "__objc_classrefs")
+    return false;
+
+  switch (SMO.getType()) {
+  default:
+    return true;
+
+  // These sections are atomized at the element boundaries without using
+  // symbols.
+  case MachO::S_4BYTE_LITERALS:
+  case MachO::S_8BYTE_LITERALS:
+  case MachO::S_16BYTE_LITERALS:
+  case MachO::S_LITERAL_POINTERS:
+  case MachO::S_NON_LAZY_SYMBOL_POINTERS:
+  case MachO::S_LAZY_SYMBOL_POINTERS:
+  case MachO::S_THREAD_LOCAL_VARIABLE_POINTERS:
+  case MachO::S_MOD_INIT_FUNC_POINTERS:
+  case MachO::S_MOD_TERM_FUNC_POINTERS:
+  case MachO::S_INTERPOSING:
+    return false;
+  }
+}
+
+MCAsmInfoDarwin::MCAsmInfoDarwin() {
+  // Common settings for all Darwin targets.
+  // Syntax:
+  LinkerPrivateGlobalPrefix = "l";
+  HasSingleParameterDotFile = false;
+  HasSubsectionsViaSymbols = true;
+
+  AlignmentIsInBytes = false;
+  COMMDirectiveAlignmentIsInBytes = false;
+  LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
+  InlineAsmStart = " InlineAsm Start";
+  InlineAsmEnd = " InlineAsm End";
+
+  // Directives:
+  HasWeakDefDirective = true;
+  HasWeakDefCanBeHiddenDirective = true;
+  WeakRefDirective = "\t.weak_reference ";
+  ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
+  HasMachoZeroFillDirective = true;  // Uses .zerofill
+  HasMachoTBSSDirective = true; // Uses .tbss
+
+  // FIXME: Change this once MC is the system assembler.
+  HasAggressiveSymbolFolding = false;
+
+  HiddenVisibilityAttr = MCSA_PrivateExtern;
+  HiddenDeclarationVisibilityAttr = MCSA_Invalid;
+
+  // Doesn't support protected visibility.
+  ProtectedVisibilityAttr = MCSA_Invalid;
+
+  HasDotTypeDotSizeDirective = false;
+  HasNoDeadStrip = true;
+  HasAltEntry = true;
+
+  DwarfUsesRelocationsAcrossSections = false;
+
+  UseIntegratedAssembler = true;
+  SetDirectiveSuppressesReloc = true;
+}