[X86][ELF] Correct relocation for DWARF TLS references

Previously we had only Linux using DTPOFF for these; all X86 ELF
targets should. Fixes a side issue mentioned in PR21077.

Differential Revision: http://reviews.llvm.org/D8011

llvm-svn: 231130

1 files changed, 8 insertions, 4 deletions

diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.h b/llvm/lib/Target/X86/X86TargetObjectFile.h
index f7455382098..a92c122838e 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.h
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.h
@@ -38,13 +38,17 @@ namespace llvm {
                                 int64_t Offset) const override;
   };
 
+  /// \brief This implemenatation is used for X86 ELF targets that don't
+  /// have a further specialization.
+  class X86ELFTargetObjectFile : public TargetLoweringObjectFileELF {
+    /// \brief Describe a TLS variable address within debug info.
+    const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const override;
+  };
+
   /// X86LinuxTargetObjectFile - This implementation is used for linux x86
   /// and x86-64.
-  class X86LinuxTargetObjectFile : public TargetLoweringObjectFileELF {
+  class X86LinuxTargetObjectFile : public X86ELFTargetObjectFile {
     void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
-
-    /// \brief Describe a TLS variable address within debug info.
-    const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const override;
   };
 
   /// \brief This implementation is used for Windows targets on x86 and x86-64.