[NFC] Add missing 'const' notion to LCSSA-related functions

These functions don't really do any changes to loop info or
dominator tree. We should state this explicitly using 'const'.

1 files changed, 7 insertions, 7 deletions

diff --git a/llvm/lib/Transforms/Utils/LCSSA.cpp b/llvm/lib/Transforms/Utils/LCSSA.cpp
index 5746d69..b1a1c56 100644
--- a/llvm/lib/Transforms/Utils/LCSSA.cpp
+++ b/llvm/lib/Transforms/Utils/LCSSA.cpp
@@ -76,7 +76,7 @@ static bool isExitBlock(BasicBlock *BB,
 /// that are outside the current loop.  If so, insert LCSSA PHI nodes and
 /// rewrite the uses.
 bool llvm::formLCSSAForInstructions(SmallVectorImpl<Instruction *> &Worklist,
-                                    DominatorTree &DT, LoopInfo &LI,
+                                    const DominatorTree &DT, const LoopInfo &LI,
                                     ScalarEvolution *SE) {
   SmallVector<Use *, 16> UsesToRewrite;
   SmallSetVector<PHINode *, 16> PHIsToRemove;
@@ -128,7 +128,7 @@ bool llvm::formLCSSAForInstructions(SmallVectorImpl<Instruction *> &Worklist,
     if (auto *Inv = dyn_cast<InvokeInst>(I))
       DomBB = Inv->getNormalDest();
 
-    DomTreeNode *DomNode = DT.getNode(DomBB);
+    const DomTreeNode *DomNode = DT.getNode(DomBB);
 
     SmallVector<PHINode *, 16> AddedPHIs;
     SmallVector<PHINode *, 8> PostProcessPHIs;
@@ -274,7 +274,7 @@ bool llvm::formLCSSAForInstructions(SmallVectorImpl<Instruction *> &Worklist,
 
 // Compute the set of BasicBlocks in the loop `L` dominating at least one exit.
 static void computeBlocksDominatingExits(
-    Loop &L, DominatorTree &DT, SmallVector<BasicBlock *, 8> &ExitBlocks,
+    Loop &L, const DominatorTree &DT, SmallVector<BasicBlock *, 8> &ExitBlocks,
     SmallSetVector<BasicBlock *, 8> &BlocksDominatingExits) {
   SmallVector<BasicBlock *, 8> BBWorklist;
 
@@ -318,7 +318,7 @@ static void computeBlocksDominatingExits(
   }
 }
 
-bool llvm::formLCSSA(Loop &L, DominatorTree &DT, LoopInfo *LI,
+bool llvm::formLCSSA(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
                      ScalarEvolution *SE) {
   bool Changed = false;
 
@@ -383,8 +383,8 @@ bool llvm::formLCSSA(Loop &L, DominatorTree &DT, LoopInfo *LI,
 }
 
 /// Process a loop nest depth first.
-bool llvm::formLCSSARecursively(Loop &L, DominatorTree &DT, LoopInfo *LI,
-                                ScalarEvolution *SE) {
+bool llvm::formLCSSARecursively(Loop &L, const DominatorTree &DT,
+                                const LoopInfo *LI, ScalarEvolution *SE) {
   bool Changed = false;
 
   // Recurse depth-first through inner loops.
@@ -396,7 +396,7 @@ bool llvm::formLCSSARecursively(Loop &L, DominatorTree &DT, LoopInfo *LI,
 }
 
 /// Process all loops in the function, inner-most out.
-static bool formLCSSAOnAllLoops(LoopInfo *LI, DominatorTree &DT,
+static bool formLCSSAOnAllLoops(const LoopInfo *LI, const DominatorTree &DT,
                                 ScalarEvolution *SE) {
   bool Changed = false;
   for (auto &L : *LI)