[clang][NFC] Remove an unused parameter in CFGBlockValues::getValue() (#147897)

The second parameter is unused since 6080d32194.

clang/lib/Analysis/UninitializedValues.cpp

diff --git a/clang/lib/Analysis/UninitializedValues.cpp b/clang/lib/Analysis/UninitializedValues.cpp
index b2a68b6..651b577 100644
--- a/clang/lib/Analysis/UninitializedValues.cpp
+++ b/clang/lib/Analysis/UninitializedValues.cpp
@@ -161,8 +161,7 @@
 
   ValueVector::reference operator[](const VarDecl *vd);
 
-  Value getValue(const CFGBlock *block, const CFGBlock *dstBlock,
-                 const VarDecl *vd) {
+  Value getValue(const CFGBlock *block, const VarDecl *vd) {
     std::optional<unsigned> idx = declToIndex.getValueIndex(vd);
     return getValueVector(block)[*idx];
   }
@@ -589,12 +588,12 @@
         if (!Pred)
           continue;
 
-        Value AtPredExit = vals.getValue(Pred, B, vd);
+        Value AtPredExit = vals.getValue(Pred, vd);
         if (AtPredExit == Initialized)
           // This block initializes the variable.
           continue;
         if (AtPredExit == MayUninitialized &&
-            vals.getValue(B, nullptr, vd) == Uninitialized) {
+            vals.getValue(B, vd) == Uninitialized) {
           // This block declares the variable (uninitialized), and is reachable
           // from a block that initializes the variable. We can't guarantee to
           // give an earlier location for the diagnostic (and it appears that
@@ -625,6 +624,8 @@
     // Scan the frontier, looking for blocks where the variable was
     // uninitialized.
     for (const auto *Block : cfg) {
+      if (vals.getValue(Block, vd) != Uninitialized)
+        continue;
       unsigned BlockID = Block->getBlockID();
       const Stmt *Term = Block->getTerminatorStmt();
       if (SuccsVisited[BlockID] && SuccsVisited[BlockID] < Block->succ_size() &&
@@ -635,8 +636,7 @@
         for (CFGBlock::const_succ_iterator I = Block->succ_begin(),
              E = Block->succ_end(); I != E; ++I) {
           const CFGBlock *Succ = *I;
-          if (Succ && SuccsVisited[Succ->getBlockID()] >= Succ->succ_size() &&
-              vals.getValue(Block, Succ, vd) == Uninitialized) {
+          if (Succ && SuccsVisited[Succ->getBlockID()] >= Succ->succ_size()) {
             // Switch cases are a special case: report the label to the caller
             // as the 'terminator', not the switch statement itself. Suppress
             // situations where no label matched: we can't be sure that's