From 4a0ceb1e6d619020cdee5453b4e4f06145ceff2c Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Fri, 9 Jun 2006 18:40:32 +0000
Subject: [PATCH] Add LCSSA as a requirement for LoopUnswitch, and assert that
 LoopUnswitch preserves LCSSA.

llvm-svn: 28739
---
 lib/Transforms/Scalar/LoopUnswitch.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index c583eea14d6..ab736c1de87 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -73,6 +73,8 @@ namespace {
       AU.addPreservedID(LoopSimplifyID);
       AU.addRequired<LoopInfo>();
       AU.addPreserved<LoopInfo>();
+      AU.addRequiredID(LCSSAID);
+      AU.addPreservedID(LCSSAID);
     }
 
   private:
@@ -199,6 +201,8 @@ bool LoopUnswitch::visitLoop(Loop *L) {
       }
   }
     
+  assert(L->isLCSSAForm());
+  
   return Changed;
 }