Remove unused pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16338 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Transforms/Scalar.h b/include/llvm/Transforms/Scalar.h
index 4db4ab7da117d2c8a7e1bce4fb7a410164b0a3d0..a950b1b6245177e62e50f2cd76864fd6b4c51967 100644 (file)
--- a/include/llvm/Transforms/Scalar.h
+++ b/include/llvm/Transforms/Scalar.h
@@ -156,29 +156,6 @@ FunctionPass *createLoopUnswitchPass();
 FunctionPass *createLoopUnrollPass();
 
 
-//===----------------------------------------------------------------------===//
-//
-// PiNodeInsertion - This pass inserts single entry Phi nodes into basic blocks
-// that are preceeded by a conditional branch, where the branch gives
-// information about the operands of the condition.  For example, this C code:
-//   if (x == 0) { ... = x + 4;
-// becomes:
-//   if (x == 0) {
-//     x2 = phi(x);    // Node that can hold data flow information about X
-//     ... = x2 + 4;
-//
-// Since the direction of the condition branch gives information about X itself
-// (whether or not it is zero), some passes (like value numbering or ABCD) can
-// use the inserted Phi/Pi nodes as a place to attach information, in this case
-// saying that X has a value of 0 in this scope.  The power of this analysis
-// information is that "in the scope" translates to "for all uses of x2".
-//
-// This special form of Phi node is refered to as a Pi node, following the
-// terminology defined in the "Array Bounds Checks on Demand" paper.
-//
-Pass *createPiNodeInsertionPass();
-
-
 //===----------------------------------------------------------------------===//
 //
 // This pass is used to promote memory references to be register references.  A