[Local] Remove unused LazyValueInfo pointer from removeUnreachableBlock.

There are no users that pass in LazyValueInfo, so we can simplify the
function a bit.

Reviewers: brzycki, asbirlea, davide

Reviewed By: davide

Differential Revision: https://reviews.llvm.org/D68297

llvm-svn: 373488

2 files changed, 4 insertions, 8 deletions

diff --git a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
index 47d226f83a4..48bbdd8d1b3 100644
--- a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -2530,7 +2530,7 @@ bool RewriteStatepointsForGC::runOnFunction(Function &F, DominatorTree &DT,
   // statepoints surviving this pass.  This makes testing easier and the
   // resulting IR less confusing to human readers.
   DomTreeUpdater DTU(DT, DomTreeUpdater::UpdateStrategy::Lazy);
-  bool MadeChange = removeUnreachableBlocks(F, nullptr, &DTU);
+  bool MadeChange = removeUnreachableBlocks(F, &DTU);
   // Flush the Dominator Tree.
   DTU.getDomTree();
 
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index eabf4bfa422..3a6b7a6a655 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -2210,10 +2210,8 @@ void llvm::removeUnwindEdge(BasicBlock *BB, DomTreeUpdater *DTU) {
 
 /// removeUnreachableBlocks - Remove blocks that are not reachable, even
 /// if they are in a dead cycle.  Return true if a change was made, false
-/// otherwise. If `LVI` is passed, this function preserves LazyValueInfo
-/// after modifying the CFG.
-bool llvm::removeUnreachableBlocks(Function &F, LazyValueInfo *LVI,
-                                   DomTreeUpdater *DTU,
+/// otherwise.
+bool llvm::removeUnreachableBlocks(Function &F, DomTreeUpdater *DTU,
                                    MemorySSAUpdater *MSSAU) {
   SmallPtrSet<BasicBlock *, 16> Reachable;
   bool Changed = markAliveBlocks(F, Reachable, DTU);
@@ -2237,7 +2235,7 @@ bool llvm::removeUnreachableBlocks(Function &F, LazyValueInfo *LVI,
     MSSAU->removeBlocks(DeadBlockSet);
 
   // Loop over all of the basic blocks that are not reachable, dropping all of
-  // their internal references. Update DTU and LVI if available.
+  // their internal references. Update DTU if available.
   std::vector<DominatorTree::UpdateType> Updates;
   for (auto *BB : DeadBlockSet) {
     for (BasicBlock *Successor : successors(BB)) {
@@ -2246,8 +2244,6 @@ bool llvm::removeUnreachableBlocks(Function &F, LazyValueInfo *LVI,
       if (DTU)
         Updates.push_back({DominatorTree::Delete, BB, Successor});
     }
-    if (LVI)
-      LVI->eraseBlock(BB);
     BB->dropAllReferences();
     if (DTU) {
       // Remove the terminator of BB to clear the successor list of BB.