[llvm-branch-commits] [llvm] b0e9b7c - [NFC][SimplifyCFG] Add STATISTIC() to the FoldValueComparisonIntoPredecessors() fold

[Roman Lebedev via llvm-branch-commits]

Author: Roman Lebedev
Date: 2020-11-30T12:27:16+03:00
New Revision: b0e9b7c59fc49559e78b58a84e45f0ea2d931761

URL: https://github.com/llvm/llvm-project/commit/b0e9b7c59fc49559e78b58a84e45f0ea2d931761
DIFF: https://github.com/llvm/llvm-project/commit/b0e9b7c59fc49559e78b58a84e45f0ea2d931761.diff

LOG: [NFC][SimplifyCFG] Add STATISTIC() to the FoldValueComparisonIntoPredecessors() fold

Added: 
    

Modified: 
    llvm/lib/Transforms/Utils/SimplifyCFG.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index 55ce05987bfd..35bef13ffaae 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -159,6 +159,8 @@ STATISTIC(
     NumLookupTablesHoles,
     "Number of switch instructions turned into lookup tables (holes checked)");
 STATISTIC(NumTableCmpReuses, "Number of reused switch table lookup compares");
+STATISTIC(NumFoldValueComparisonIntoPredecessors,
+          "Number of value comparisons folded into predecessor basic blocks");
 STATISTIC(NumFoldBranchToCommonDest,
           "Number of branches folded into predecessor basic block");
 STATISTIC(
@@ -1046,8 +1048,14 @@ bool SimplifyCFGOpt::FoldValueComparisonIntoPredecessors(Instruction *TI,
   BasicBlock *BB = TI->getParent();
   Value *CV = isValueEqualityComparison(TI); // CondVal
   assert(CV && "Not a comparison?");
+
   bool Changed = false;
 
+  auto _ = make_scope_exit([&]() {
+    if (Changed)
+      ++NumFoldValueComparisonIntoPredecessors;
+  });
+
   SmallVector<BasicBlock *, 16> Preds(pred_begin(BB), pred_end(BB));
   while (!Preds.empty()) {
     BasicBlock *Pred = Preds.pop_back_val();