Enable Chris' value propagation change. It make available known sign, zero, one bits...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66777 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index e2b1c9e..fd2eb06 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -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 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
 
   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