MC/Mach-O/x86_64: Add a new hook for checking whether a particular section can

be diced into atoms, and adjust getAtom() to take this into account.
 - This fixes relocations to symbols in fixed size literal sections, for
   example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103532 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetAsmBackend.h

@@ -90,6 +90,14 @@ public:
     return false;
   }
 
+  /// isSectionAtomizable - Check whether the given section can be split into
+  /// atoms.
+  ///
+  /// \see MCAssembler::isSymbolLinkerVisible().
+  virtual bool isSectionAtomizable(const MCSection &Section) const {
+    return true;
+  }
+
   /// isVirtualSection - Check whether the given section is "virtual", that is
   /// has no actual object file contents.
   virtual bool isVirtualSection(const MCSection &Section) const = 0;