[llvm] r290607 - [MemDep] Operand visited twice bugfix

[Piotr Padlewski via llvm-commits]

Author: prazek
Date: Tue Dec 27 09:06:07 2016
New Revision: 290607

URL: http://llvm.org/viewvc/llvm-project?rev=290607&view=rev
Log:
[MemDep] Operand visited twice bugfix

Because operand was not marked as seen it was visited twice.
It doesn't change behavior of optimization, it just saves redudant
visit, so no test changes.

Modified:
    llvm/trunk/lib/Analysis/MemoryDependenceAnalysis.cpp

Modified: llvm/trunk/lib/Analysis/MemoryDependenceAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/MemoryDependenceAnalysis.cpp?rev=290607&r1=290606&r2=290607&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/MemoryDependenceAnalysis.cpp (original)
+++ llvm/trunk/lib/Analysis/MemoryDependenceAnalysis.cpp Tue Dec 27 09:06:07 2016
@@ -353,6 +353,7 @@ MemoryDependenceResults::getInvariantGro
   // Queue to process all pointers that are equivalent to load operand.
   SmallVector<Value *, 8> LoadOperandsQueue;
   LoadOperandsQueue.push_back(LoadOperand);
+  Seen.insert(LoadOperand);
   while (!LoadOperandsQueue.empty()) {
     Value *Ptr = LoadOperandsQueue.pop_back_val();
     if (isa<GlobalValue>(Ptr))