Add the support code to enable the dwarf accelerator tables. Upcoming patches

to fix the types section (all types, not just global types), and testcases.

The code to do the final emission is disabled by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143923 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 2 deletions

diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index 397e9c3a62..1fcda31d2d 100644
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -152,6 +152,24 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
                            SectionKind::getReadOnly());
 
   // Debug Information.
+  DwarfAccelNamesSection =
+    Ctx->getMachOSection("__DWARF", "__apple_names",
+                         MCSectionMachO::S_ATTR_DEBUG,
+                         SectionKind::getMetadata());
+  DwarfAccelObjCSection =
+    Ctx->getMachOSection("__DWARF", "__apple_objc",
+                         MCSectionMachO::S_ATTR_DEBUG,
+                         SectionKind::getMetadata());
+  // 16 character section limit...
+  DwarfAccelNamespaceSection =
+    Ctx->getMachOSection("__DWARF", "__apple_namespac",
+                         MCSectionMachO::S_ATTR_DEBUG,
+                         SectionKind::getMetadata());
+  DwarfAccelTypesSection =
+    Ctx->getMachOSection("__DWARF", "__apple_types",
+                         MCSectionMachO::S_ATTR_DEBUG,
+                         SectionKind::getMetadata());
+    
   DwarfAbbrevSection =
     Ctx->getMachOSection("__DWARF", "__debug_abbrev",
                          MCSectionMachO::S_ATTR_DEBUG,
@@ -506,8 +524,12 @@ void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
   PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
     TTypeEncoding = dwarf::DW_EH_PE_absptr;
 
-  EHFrameSection = 0;           // Created on demand.
-  CompactUnwindSection = 0;     // Used only by selected targets.
+  EHFrameSection = 0;             // Created on demand.
+  CompactUnwindSection = 0;       // Used only by selected targets.
+  DwarfAccelNamesSection = 0;     // Used only by selected targets.
+  DwarfAccelObjCSection = 0;      // Used only by selected targets.
+  DwarfAccelNamespaceSection = 0; // Used only by selected targets.
+  DwarfAccelTypesSection = 0;     // Used only by selected targets.
 
   Triple T(TT);
   Triple::ArchType Arch = T.getArch();