Rebased PNaCl localmods in LLVM to 223109

include/llvm/Target/TargetOptions.h

Index: include/llvm/Target/TargetOptions.h
diff --git a/include/llvm/Target/TargetOptions.h b/include/llvm/Target/TargetOptions.h
index 73014d846f37b213d00114b4cf9133b433d624a6..122aef95a259c83187b75bcf7e41fbf17c9b9a34 100644
--- a/include/llvm/Target/TargetOptions.h
+++ b/include/llvm/Target/TargetOptions.h
@@ -31,6 +31,12 @@ namespace llvm {
     };
   }
 
+  // @LOCALMOD-BEGIN
+  /// TLSUseCall - This flag enables the use of a function call to get the
+  /// thread pointer for TLS accesses, instead of using inline code.
+  extern bool TLSUseCall;
+  // @LOCALMOD-END
+
   namespace FPOpFusion {
     enum FPOpFusionMode {
       Fast,     // Enable fusion of FP ops wherever it's profitable.