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[LAA] Improve code in replaceSymbolicStrideSCEV (NFC) #139532

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Merged
artagnon merged 1 commit into from
May 12, 2025
Merged

[LAA] Improve code in replaceSymbolicStrideSCEV (NFC) #139532

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5 changes: 2 additions & 3 deletions llvm/lib/Analysis/LoopAccessAnalysis.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -158,12 +158,11 @@ const SCEV *llvm::replaceSymbolicStrideSCEV(PredicatedScalarEvolution &PSE,

// If there is an entry in the map return the SCEV of the pointer with the
// symbolic stride replaced by one.
DenseMap<Value *, const SCEV *>::const_iterator SI = PtrToStride.find(Ptr);
if (SI == PtrToStride.end())
const SCEV *StrideSCEV = PtrToStride.lookup(Ptr);
if (!StrideSCEV)
// For a non-symbolic stride, just return the original expression.
return OrigSCEV;

const SCEV *StrideSCEV = SI->second;
// Note: This assert is both overly strong and overly weak. The actual
// invariant here is that StrideSCEV should be loop invariant. The only
// such invariant strides we happen to speculate right now are unknowns
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