[llvm] Revert "[GVN][NFC] Use early return in phiTranslateImpl() (#149268)" (PR #149270)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Madhur Amilkanthwar (madhur13490)

<details>
<summary>Changes</summary>

This reverts commit 1d398a96dc6b58d15d289c71e2d9f229a0ba719b.

---
Full diff: https://github.com/llvm/llvm-project/pull/149270.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Scalar/GVN.cpp (+6-9) 


``````````diff
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index affae41ed2c83..8bff458f88bb9 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -2367,15 +2367,12 @@ 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)
-      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 (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 (BasicBlock *BB = NumberingBB[Num]) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/149270