Add a __LD,__compact_unwind section.

If the linker supports it, this will hold the CIE and FDE information in a
compact format. The implementation of the compact unwinding emission is coming
soon.

llvm-svn: 133658

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 2da1bd48fb1..3f346a35957 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -605,6 +605,12 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
   // Exception Handling.
   LSDASection = getContext().getMachOSection("__TEXT", "__gcc_except_tab", 0,
                                              SectionKind::getReadOnlyWithRel());
+
+  CompactUnwindSection =
+    getContext().getMachOSection("__LD", "__compact_unwind",
+                                 MCSectionMachO::S_ATTR_DEBUG,
+                                 SectionKind::getReadOnly());
+
   // Debug Information.
   DwarfAbbrevSection =
     getContext().getMachOSection("__DWARF", "__debug_abbrev",