[llvm-commits] [llvm] r63933 - /llvm/trunk/include/llvm/Target/TargetRegisterInfo.h

[Evan Cheng]

Author: evancheng
Date: Fri Feb  6 11:01:33 2009
New Revision: 63933

URL: http://llvm.org/viewvc/llvm-project?rev=63933&view=rev
Log:
Document the meaning of -1 for getCopyCost.

Modified:
    llvm/trunk/include/llvm/Target/TargetRegisterInfo.h

Modified: llvm/trunk/include/llvm/Target/TargetRegisterInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetRegisterInfo.h?rev=63933&r1=63932&r2=63933&view=diff

==============================================================================
--- llvm/trunk/include/llvm/Target/TargetRegisterInfo.h (original)
+++ llvm/trunk/include/llvm/Target/TargetRegisterInfo.h Fri Feb  6 11:01:33 2009
@@ -202,7 +202,8 @@
   unsigned getAlignment() const { return Alignment; }
 
   /// getCopyCost - Return the cost of copying a value between two registers in
-  /// this class.
+  /// this class. -1 means the register class is very expensive to copy e.g.
+  /// status flag register classes.
   int getCopyCost() const { return CopyCost; }
 };