[GVN][NFC] Use early return in phiTranslateImpl()#149268
Merged
madhur13490 merged 1 commit intollvm:mainfrom Jul 17, 2025
Merged
[GVN][NFC] Use early return in phiTranslateImpl()#149268madhur13490 merged 1 commit intollvm:mainfrom
madhur13490 merged 1 commit intollvm:mainfrom
Conversation
Member
|
@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
added a commit
to madhur13490/llvm-project
that referenced
this pull request
Jul 17, 2025
This reverts commit 1d398a9.
madhur13490
added a commit
that referenced
this pull request
Jul 17, 2025
|
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; | ||
| } |
Contributor
There was a problem hiding this comment.
previously we would return Num; if no translated incoming value could be found, now we fall through.
This was referenced Jul 23, 2025
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
No description provided.