[GVN][NFC] Use early return in phiTranslateImpl() (llvm#149268)

Author: madhur13490

llvm/lib/Transforms/Scalar/GVN.cpp

@@ -2367,12 +2367,15 @@ uint32_t GVNPass::ValueTable::phiTranslateImpl(const BasicBlock *Pred,
   // See if we can refine the value number by looking at the PN incoming value
   // for the given predecessor.
   if (PHINode *PN = NumberingPhi[Num]) {
-    if (PN->getParent() == PhiBlock)
-      for (unsigned I = 0; I != PN->getNumIncomingValues(); ++I)
-        if (PN->getIncomingBlock(I) == Pred)
-          if (uint32_t TransVal = lookup(PN->getIncomingValue(I), false))
-            return TransVal;
-    return Num;
+    if (PN->getParent() != PhiBlock)
+      return Num;
+
+    for (unsigned I = 0; I != PN->getNumIncomingValues(); ++I) {
+      if (PN->getIncomingBlock(I) != Pred)
+        continue;
+      if (uint32_t TransVal = lookup(PN->getIncomingValue(I), false))
+        return TransVal;
+    }
   }
 
   if (BasicBlock *BB = NumberingBB[Num]) {