IndVarSimplify preserves ScalarEvolution. In the
-std-compile-opts sequence, this avoids the need for ScalarEvolution to
be rerun before LoopDeletion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65318 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 3e9615c..1207dbf 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -81,6 +81,7 @@
AU.addRequiredID(LCSSAID);
AU.addRequiredID(LoopSimplifyID);
AU.addRequired<LoopInfo>();
+ AU.addPreserved<ScalarEvolution>();
AU.addPreservedID(LoopSimplifyID);
AU.addPreservedID(LCSSAID);
AU.setPreservesCFG();