[PATCH] D20682: Expose target-specific pre-linking passes in TargetMachine

[Yaxun Liu via llvm-commits]

yaxunl created this revision.
yaxunl added a reviewer: chandlerc.
yaxunl added subscribers: llvm-commits, Anastasia, rsmith, tstellarAMD.

Sometimes a backend needs to apply certain target-specific passes before linking. These passes sit in target directory and Clang needs a way to access them.

This patch attempts to expose target-specific pre-linking passes by adding a virtual member function addPreLinkPasses to TargetMachine.

The related Clang change is here:

http://reviews.llvm.org/D20681

http://reviews.llvm.org/D20682

Files:
  include/llvm/Target/TargetMachine.h

Index: include/llvm/Target/TargetMachine.h
===================================================================
--- include/llvm/Target/TargetMachine.h
+++ include/llvm/Target/TargetMachine.h
@@ -254,6 +254,9 @@
     return true;
   }
 
+  /// Add target-specific pre-linking passes to the specified pass manager.
+  virtual void addPreLinkPasses(PassManagerBase &, raw_pwrite_stream &) {}
+
   /// True if subtarget inserts the final scheduling pass on its own.
   ///
   /// Branch relaxation, which must happen after block placement, can


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