[llvm-commits] [llvm] r78669 - /llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h

[Dan Gohman]

Author: djg
Date: Tue Aug 11 10:50:56 2009
New Revision: 78669

URL: http://llvm.org/viewvc/llvm-project?rev=78669&view=rev
Log:
Add a comment about the additional meaning of setPreservesCFG() for
MachineFunctionPass passes.

Modified:
    llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h

Modified: llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h?rev=78669&r1=78668&r2=78669&view=diff

==============================================================================
--- llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h (original)
+++ llvm/trunk/include/llvm/CodeGen/MachineFunctionPass.h Tue Aug 11 10:50:56 2009
@@ -40,6 +40,10 @@
 
   /// getAnalysisUsage - Subclasses that override getAnalysisUsage
   /// must call this.
+  ///
+  /// For MachineFunctionPasses, calling AU.preservesCFG() indicates that
+  /// the pass does not modify the MachineBasicBlock CFG.
+  ///
   virtual void getAnalysisUsage(AnalysisUsage &AU) const;
 
 private: