[llvm-commits] [llvm] r49469 - /llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h

[Evan Cheng]

Author: evancheng
Date: Thu Apr 10 03:03:14 2008
New Revision: 49469

URL: http://llvm.org/viewvc/llvm-project?rev=49469&view=rev
Log:
Add comment.

Modified:
    llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h

Modified: llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h?rev=49469&r1=49468&r2=49469&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h (original)
+++ llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.h Thu Apr 10 03:03:14 2008
@@ -223,6 +223,8 @@
     /// subregister.
     void UpdateRegDefsUses(unsigned SrcReg, unsigned DstReg, unsigned SubIdx);
 
+    /// RemoveDeadImpDef - Remove implicit_def instructions which are
+    /// "re-defining" registers due to insert_subreg coalescing. e.g.
     void RemoveDeadImpDef(unsigned Reg, LiveInterval &LI);
 
     /// RemoveUnnecessaryKills - Remove kill markers that are no longer accurate