Support standard DWARF TLS opcode; Darwin and PS4 use it.

[oota-llvm.git] / lib / MC / MCAsmInfoDarwin.cpp

diff --git a/lib/MC/MCAsmInfoDarwin.cpp b/lib/MC/MCAsmInfoDarwin.cpp
index 3c31caa5aca8170b5193f56e9b6c65abfc3d8547..ae9486d3db4de9c535af8cc9c0c1667faaa45559 100644 (file)
--- a/lib/MC/MCAsmInfoDarwin.cpp
+++ b/lib/MC/MCAsmInfoDarwin.cpp
@@ -13,35 +13,84 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCAsmInfoDarwin.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.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_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:
-  GlobalPrefix = "_";
-  PrivateGlobalPrefix = "L";
   LinkerPrivateGlobalPrefix = "l";
-  AllowQuotesInName = true;
   HasSingleParameterDotFile = false;
   HasSubsectionsViaSymbols = true;
 
   AlignmentIsInBytes = false;
   COMMDirectiveAlignmentIsInBytes = false;
+  LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
   InlineAsmStart = " InlineAsm Start";
   InlineAsmEnd = " InlineAsm End";
 
   // Directives:
-  WeakDefDirective = "\t.weak_definition ";
+  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
   HasStaticCtorDtorReferenceInStaticMode = true;
-  
+
+  // FIXME: Change this once MC is the system assembler.
+  HasAggressiveSymbolFolding = false;
+
   HiddenVisibilityAttr = MCSA_PrivateExtern;
+  HiddenDeclarationVisibilityAttr = MCSA_Invalid;
+
   // Doesn't support protected visibility.
-  ProtectedVisibilityAttr = MCSA_Global;
-  
+  ProtectedVisibilityAttr = MCSA_Invalid;
+
   HasDotTypeDotSizeDirective = false;
   HasNoDeadStrip = true;
-}
 
+  DwarfUsesRelocationsAcrossSections = false;
+
+  UseIntegratedAssembler = true;
+  SetDirectiveSuppressesReloc = true;
+}