These passes preserve CFG.
This patch fixes Benchmarks/Trimaran/enc-pc1/enc-pc1 failure reported by Grawp-PIC i386 nightly tester

llvm-svn: 48623
diff --git a/llvm/lib/Analysis/LoopInfo.cpp b/llvm/lib/Analysis/LoopInfo.cpp
index 1b04f06..e067c17 100644
--- a/llvm/lib/Analysis/LoopInfo.cpp
+++ b/llvm/lib/Analysis/LoopInfo.cpp
@@ -29,7 +29,7 @@
 
 char LoopInfo::ID = 0;
 static RegisterPass<LoopInfo>
-X("loops", "Natural Loop Construction", false, true);
+X("loops", "Natural Loop Construction", true, true);
 
 //===----------------------------------------------------------------------===//
 // Loop implementation