Add LCSSA as a requirement for LoopUnswitch, and assert that LoopUnswitch preserves

LCSSA.

llvm-svn: 28739

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
index c583eea14d6..ab736c1de87 100644
--- a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/llvm/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;
 }