[llvm] f3f7f08 - [SLP] Fix Wsign-compare warning (NFC) (#131948)

[via llvm-commits]

Author: Longsheng Mou
Date: 2025-03-19T17:01:42+08:00
New Revision: f3f7f08ecaf0889b16bbe11fd6c9d38586979b1e

URL: https://github.com/llvm/llvm-project/commit/f3f7f08ecaf0889b16bbe11fd6c9d38586979b1e
DIFF: https://github.com/llvm/llvm-project/commit/f3f7f08ecaf0889b16bbe11fd6c9d38586979b1e.diff

LOG: [SLP] Fix Wsign-compare warning (NFC) (#131948)

llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:4805:57:
warning: comparison of integer expressions of different signedness:
‘int’ and ‘std::size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
    [](const auto &P) { return P.value() % 2 != P.index() % 2; }))
                               ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~

Added: 
    

Modified: 
    llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 4a835bc797ab6..1d9d80bd69def 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -4802,7 +4802,9 @@ BoUpSLP::findReusedOrderedScalars(const BoUpSLP::TreeEntry &TE,
     if (!Entries.front().front()->ReuseShuffleIndices.empty() &&
         TE.getVectorFactor() == 2 && Mask.size() == 2 &&
         any_of(enumerate(Entries.front().front()->ReuseShuffleIndices),
-               [](const auto &P) { return P.value() % 2 != P.index() % 2; }))
+               [](const auto &P) {
+                 return P.value() % 2 != static_cast<int>(P.index()) % 2;
+               }))
       return std::nullopt;
 
     // Perfect match in the graph, will reuse the previously vectorized