[llvm] 4f94121 - [Analysis] Remove changeCondBranchToUnconditionalTo (NFC)

[Kazu Hirata via llvm-commits]

Author: Kazu Hirata
Date: 2021-07-10T17:31:43-07:00
New Revision: 4f94121cce24af28b64a9b67e2f5355bcca43574

URL: https://github.com/llvm/llvm-project/commit/4f94121cce24af28b64a9b67e2f5355bcca43574
DIFF: https://github.com/llvm/llvm-project/commit/4f94121cce24af28b64a9b67e2f5355bcca43574.diff

LOG: [Analysis] Remove changeCondBranchToUnconditionalTo (NFC)

The last use was removed on Jan 21, 2021 in commit
0895b836d74ed333468ddece2102140494eb33b6.

Added: 
    

Modified: 
    llvm/include/llvm/Analysis/MemorySSAUpdater.h
    llvm/lib/Analysis/MemorySSAUpdater.cpp

Removed: 
    


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diff  --git a/llvm/include/llvm/Analysis/MemorySSAUpdater.h b/llvm/include/llvm/Analysis/MemorySSAUpdater.h
index b0bf2e5ead623..659e6aff6e28b 100644
--- a/llvm/include/llvm/Analysis/MemorySSAUpdater.h
+++ b/llvm/include/llvm/Analysis/MemorySSAUpdater.h
@@ -240,11 +240,6 @@ class MemorySSAUpdater {
   /// successors.
   void changeToUnreachable(const Instruction *I);
 
-  /// Conditional branch BI is changed or replaced with an unconditional branch
-  /// to `To`. Update Phis in BI's successors to remove BI's BB.
-  void changeCondBranchToUnconditionalTo(const BranchInst *BI,
-                                         const BasicBlock *To);
-
   /// Get handle on MemorySSA.
   MemorySSA* getMemorySSA() const { return MSSA; }
 

diff  --git a/llvm/lib/Analysis/MemorySSAUpdater.cpp b/llvm/lib/Analysis/MemorySSAUpdater.cpp
index faaafae543fab..616864f360bf3 100644
--- a/llvm/lib/Analysis/MemorySSAUpdater.cpp
+++ b/llvm/lib/Analysis/MemorySSAUpdater.cpp
@@ -1426,22 +1426,6 @@ void MemorySSAUpdater::changeToUnreachable(const Instruction *I) {
   tryRemoveTrivialPhis(UpdatedPHIs);
 }
 
-void MemorySSAUpdater::changeCondBranchToUnconditionalTo(const BranchInst *BI,
-                                                         const BasicBlock *To) {
-  const BasicBlock *BB = BI->getParent();
-  SmallVector<WeakVH, 16> UpdatedPHIs;
-  for (const BasicBlock *Succ : successors(BB)) {
-    removeDuplicatePhiEdgesBetween(BB, Succ);
-    if (Succ != To)
-      if (auto *MPhi = MSSA->getMemoryAccess(Succ)) {
-        MPhi->unorderedDeleteIncomingBlock(BB);
-        UpdatedPHIs.push_back(MPhi);
-      }
-  }
-  // Optimize trivial phis.
-  tryRemoveTrivialPhis(UpdatedPHIs);
-}
-
 MemoryAccess *MemorySSAUpdater::createMemoryAccessInBB(
     Instruction *I, MemoryAccess *Definition, const BasicBlock *BB,
     MemorySSA::InsertionPlace Point) {