Remove some useless map operations. Loads/stores that are in the same

BB as the load are not included in the Cand* sets at all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19911 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/LoadValueNumbering.cpp b/lib/Analysis/LoadValueNumbering.cpp
index 354eb8d560269cd568fce0ca8c1eb92401ba0bb8..5e91be2a84029dd20418a1ad74d4e051412800a2 100644 (file)
--- a/lib/Analysis/LoadValueNumbering.cpp
+++ b/lib/Analysis/LoadValueNumbering.cpp
@@ -374,17 +374,7 @@ void LoadVN::getEqualNumberNodes(Value *V,
   // Get dominators.
   DominatorSet &DomSetInfo = getAnalysis<DominatorSet>();
 
-  // Find all of the candidate loads and stores that are in the same block as
-  // the defining instruction.
   std::set<Instruction*> Instrs;
-  Instrs.insert(CandidateLoads[LoadBB].begin(), CandidateLoads[LoadBB].end());
-  CandidateLoads.erase(LoadBB);
-  Instrs.insert(CandidateStores[LoadBB].begin(), CandidateStores[LoadBB].end());
-  CandidateStores.erase(LoadBB);
-
-  // If there is anything left in the Instrs set, it could not possibly equal
-  // LI.
-  Instrs.clear();
 
   // TransparentBlocks - For each basic block the load/store is alive across,
   // figure out if the pointer is invalidated or not.  If it is invalidated, the