[llvm-commits] [llvm] r92850 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

[Evan Cheng]

Author: evancheng
Date: Wed Jan  6 13:43:21 2010
New Revision: 92850

URL: http://llvm.org/viewvc/llvm-project?rev=92850&view=rev
Log:
Comment.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp?rev=92850&r1=92849&r2=92850&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Wed Jan  6 13:43:21 2010
@@ -438,6 +438,9 @@
   SDB->clear();
 }
 
+/// ShrinkDemandedOps - A late transformation pass that shrink expressions
+/// using TargetLowering::TargetLoweringOpt::ShrinkDemandedOp. It converts
+/// x+y to (VT)((SmallVT)x+(SmallVT)y) if the casts are free.
 void SelectionDAGISel::ShrinkDemandedOps() {
   SmallVector<SDNode*, 128> Worklist;