[llvm] b5a1b45 - [SLP] Early return in getReorderingData [nfc]

[Philip Reames via llvm-commits]

Author: Philip Reames
Date: 2024-08-29T08:58:27-07:00
New Revision: b5a1b45fe321cdf57d1b6155ecbbc18b6f95502f

URL: https://github.com/llvm/llvm-project/commit/b5a1b45fe321cdf57d1b6155ecbbc18b6f95502f
DIFF: https://github.com/llvm/llvm-project/commit/b5a1b45fe321cdf57d1b6155ecbbc18b6f95502f.diff

LOG: [SLP] Early return in getReorderingData [nfc]

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index fe57dbfc93d3e7..81811e0a4d9295 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -5226,6 +5226,9 @@ BoUpSLP::getReorderingData(const TreeEntry &TE, bool TopToBottom) {
       !TE.isAltShuffle())
     return TE.ReorderIndices;
   if (TE.State == TreeEntry::Vectorize && TE.getOpcode() == Instruction::PHI) {
+    if (!TE.ReorderIndices.empty())
+      return TE.ReorderIndices;
+
     auto PHICompare = [&](unsigned I1, unsigned I2) {
       Value *V1 = TE.Scalars[I1];
       Value *V2 = TE.Scalars[I2];
@@ -5259,8 +5262,6 @@ BoUpSLP::getReorderingData(const TreeEntry &TE, bool TopToBottom) {
           return false;
       return true;
     };
-    if (!TE.ReorderIndices.empty())
-      return TE.ReorderIndices;
     DenseMap<unsigned, unsigned> PhiToId;
     SmallVector<unsigned> Phis(TE.Scalars.size());
     std::iota(Phis.begin(), Phis.end(), 0);