[llvm-commits] [llvm] r66777 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

[Evan Cheng]

Author: evancheng
Date: Thu Mar 12 01:29:49 2009
New Revision: 66777

URL: http://llvm.org/viewvc/llvm-project?rev=66777&view=rev
Log:
Enable Chris' value propagation change. It make available known sign, zero, one bits information for values that are live out of basic blocks. The goal is to eliminate unnecessary sext, zext, truncate of values that are live-in to blocks. This does not handle PHI nodes yet.

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=66777&r1=66776&r2=66777&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Thu Mar 12 01:29:49 2009
@@ -53,8 +53,6 @@
 using namespace llvm;
 
 static cl::opt<bool>
-EnableValueProp("enable-value-prop", cl::Hidden);
-static cl::opt<bool>
 DisableLegalizeTypes("disable-legalize-types", cl::Hidden);
 #ifndef NDEBUG
 static cl::opt<bool>
@@ -644,7 +642,7 @@
 
   if (ViewISelDAGs) CurDAG->viewGraph("isel input for " + BlockName);
   
-  if (!Fast && EnableValueProp)
+  if (!Fast)
     ComputeLiveOutVRegInfo();
 
   // Third, instruction select all of the operations to machine code, adding the