diff --git a/include/llvm/Transforms/Utils/Local.h b/include/llvm/Transforms/Utils/Local.h
index 05db3b12552..6df8da3de53 100644
--- a/include/llvm/Transforms/Utils/Local.h
+++ b/include/llvm/Transforms/Utils/Local.h
@@ -21,6 +21,7 @@ namespace llvm {
 
 class Pass;
 class PHINode;
+class AllocaInst;
 
 //===----------------------------------------------------------------------===//
 //  Local constant propagation...
@@ -87,6 +88,14 @@ Value *hasConstantValue(PHINode *PN);
 ///
 bool SimplifyCFG(BasicBlock *BB);
 
+/// DemoteRegToStack - This function takes a virtual register computed by an
+/// Instruction& X and replaces it with a slot in the stack frame, allocated via
+/// alloca.  This allows the CFG to be changed around without fear of
+/// invalidating the SSA information for the value.  It returns the pointer to
+/// the alloca inserted to create a stack slot for X.
+///
+AllocaInst *DemoteRegToStack(Instruction &X);
+
 } // End llvm namespace
 
 #endif