Index: include/llvm/Target/TargetMachine.h
===================================================================
--- include/llvm/Target/TargetMachine.h
+++ include/llvm/Target/TargetMachine.h
@@ -217,6 +217,11 @@
   /// uses this to answer queries about the IR.
   virtual TargetIRAnalysis getTargetIRAnalysis();
 
+  /// Add target-specific function passes that should be run as early as
+  /// possible -- before most machine-independent IR passes.  Most
+  /// TargetMachines have no such passes.
+  virtual void addEarlyAsPossiblePasses(PassManagerBase &) {}
+
   /// These enums are meant to be passed into addPassesToEmitFile to indicate
   /// what type of file to emit, and returned by it to indicate what type of
   /// file could actually be made.