Mark hasConstantValue as a const method
llvm-svn: 22666
diff --git a/llvm/lib/VMCore/Instructions.cpp b/llvm/lib/VMCore/Instructions.cpp
index 035edb3..a3bd468 100644
--- a/llvm/lib/VMCore/Instructions.cpp
+++ b/llvm/lib/VMCore/Instructions.cpp
@@ -135,7 +135,7 @@
/// hasConstantValue - If the specified PHI node always merges together the same
/// value, return the value, otherwise return null.
///
-Value *PHINode::hasConstantValue(bool AllowNonDominatingInstruction) {
+Value *PHINode::hasConstantValue(bool AllowNonDominatingInstruction) const {
// If the PHI node only has one incoming value, eliminate the PHI node...
if (getNumIncomingValues() == 1)
return getIncomingValue(0);