[SimplifyCFG] SpeculativelyExecuteBB(): It's SpeculatedInstructions, not SpeculationCost

It counts the number of instructions we are ok speculating
(at most 1 there), not their cost, so rename accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371294 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index bcf52198e9470192c6996219f78916ff7fabc077..2e0a07f105de59d7dd2dfc52a0e3358e6d9b35b2 100644 (file)
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -1979,7 +1979,7 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *ThenBB,
 
   SmallVector<Instruction *, 4> SpeculatedDbgIntrinsics;
 
-  unsigned SpeculationCost = 0;
+  unsigned SpeculatedInstructions = 0;
   Value *SpeculatedStoreValue = nullptr;
   StoreInst *SpeculatedStore = nullptr;
   for (BasicBlock::iterator BBI = ThenBB->begin(),
@@ -1994,8 +1994,8 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *ThenBB,
 
     // Only speculatively execute a single instruction (not counting the
     // terminator) for now.
-    ++SpeculationCost;
-    if (SpeculationCost > 1)
+    ++SpeculatedInstructions;
+    if (SpeculatedInstructions > 1)
       return false;
 
     // Don't hoist the instruction if it's unsafe or expensive.
@@ -2032,8 +2032,8 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *ThenBB,
            E = SinkCandidateUseCounts.end();
        I != E; ++I)
     if (I->first->hasNUses(I->second)) {
-      ++SpeculationCost;
-      if (SpeculationCost > 1)
+      ++SpeculatedInstructions;
+      if (SpeculatedInstructions > 1)
         return false;
     }
 
@@ -2073,8 +2073,8 @@ static bool SpeculativelyExecuteBB(BranchInst *BI, BasicBlock *ThenBB,
     // getting expanded into Instructions.
     // FIXME: This doesn't account for how many operations are combined in the
     // constant expression.
-    ++SpeculationCost;
-    if (SpeculationCost > 1)
+    ++SpeculatedInstructions;
+    if (SpeculatedInstructions > 1)
       return false;
   }