[GVN][NFC] Use early return in phiTranslateImpl() #149268
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@llvm/pr-subscribers-llvm-transforms Author: Madhur Amilkanthwar (madhur13490) ChangesFull diff: https://github.com/llvm/llvm-project/pull/149268.diff 1 Files Affected:
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index 8bff458f88bb9..affae41ed2c83 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/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]) {
|
madhur13490
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This reverts commit 1d398a9.
madhur13490
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/23672 Here is the relevant piece of the build log for the reference |
fhahn
reviewed
Jul 17, 2025
| continue; | ||
| if (uint32_t TransVal = lookup(PN->getIncomingValue(I), false)) | ||
| return TransVal; | ||
| } |
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previously we would return Num; if no translated incoming value could be found, now we fall through.
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Yes, realized this. Reverted in #149270
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