[NFC] Promote DFS to field for further use
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354118 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopSimplifyCFG.cpp b/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
index 746ca9e..40b3306 100644
--- a/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
+++ b/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
@@ -90,6 +90,7 @@
ScalarEvolution &SE;
MemorySSAUpdater *MSSAU;
DomTreeUpdater DTU;
+ LoopBlocksDFS DFS;
SmallVector<DominatorTree::UpdateType, 16> DTUpdates;
// Whether or not the current loop has irreducible CFG.
@@ -176,7 +177,6 @@
/// Fill all information about status of blocks and exits of the current loop
/// if constant folding of all branches will be done.
void analyze() {
- LoopBlocksDFS DFS(&L);
DFS.perform(&LI);
assert(DFS.isComplete() && "DFS is expected to be finished");
@@ -498,7 +498,7 @@
ConstantTerminatorFoldingImpl(Loop &L, LoopInfo &LI, DominatorTree &DT,
ScalarEvolution &SE,
MemorySSAUpdater *MSSAU)
- : L(L), LI(LI), DT(DT), SE(SE), MSSAU(MSSAU),
+ : L(L), LI(LI), DT(DT), SE(SE), MSSAU(MSSAU), DFS(&L),
DTU(DT, DomTreeUpdater::UpdateStrategy::Eager) {}
bool run() {
assert(L.getLoopLatch() && "Should be single latch!");