From 5fbada2e2142e6227f8312dcff242b1729e89c82 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 8 May 2002 22:19:01 +0000
Subject: [PATCH] Add expr reassociation pass prototype

llvm-svn: 2558
---
 llvm/include/llvm/Transforms/Scalar.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index 144db2367092..ba8b90ca47dc 100644
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -110,6 +110,16 @@ Pass *createInstructionCombiningPass();
 Pass *createPromoteMemoryToRegister();
 
 
+//===----------------------------------------------------------------------===//
+//
+// This pass reassociates commutative expressions in an order that is designed
+// to promote better constant propogation, GCSE, LICM, PRE...
+//
+// For example:  4 + (x + 5)  ->  x + (4 + 5)
+//
+Pass *createReassociatePass();
+
+
 //===----------------------------------------------------------------------===//
 //
 // These functions removes symbols from functions and modules.