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[delinearize] Extract array dimensions from alloca and global declarations #156342

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[delinearize] Extract array dimensions from alloca and global declarations #156342

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18 changes: 18 additions & 0 deletions llvm/include/llvm/Analysis/Delinearization.h
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,13 @@ void delinearize(ScalarEvolution &SE, const SCEV *Expr,
SmallVectorImpl<const SCEV *> &Subscripts,
SmallVectorImpl<const SCEV *> &Sizes, const SCEV *ElementSize);

/// Same as delinearize. TODO: only use delinearize() instead of other internal
/// functions.
bool delinearizeUsingArrayInfo(ScalarEvolution &SE, const SCEV *AccessFn,
SmallVectorImpl<const SCEV *> &Subscripts,
SmallVectorImpl<const SCEV *> &Sizes,
const SCEV *ElementSize);

/// Compute the dimensions of fixed size array from \Expr and save the results
/// in \p Sizes.
bool findFixedSizeArrayDimensions(ScalarEvolution &SE, const SCEV *Expr,
Expand Down Expand Up @@ -155,6 +162,17 @@ bool getIndexExpressionsFromGEP(ScalarEvolution &SE,
SmallVectorImpl<const SCEV *> &Subscripts,
SmallVectorImpl<int> &Sizes);

/// Compute access functions for each subscript in a delinearized array access.
void computeAccessFunctions(ScalarEvolution &SE, const SCEV *Expr,
SmallVectorImpl<const SCEV *> &Subscripts,
SmallVectorImpl<const SCEV *> &Sizes,
const SCEV *ElementSize);

/// Backward compatibility wrapper for computeAccessFunctions.
void computeAccessFunctions(ScalarEvolution &SE, const SCEV *Expr,
SmallVectorImpl<const SCEV *> &Subscripts,
SmallVectorImpl<const SCEV *> &Sizes);

/// Implementation of fixed size array delinearization. Try to delinearize
/// access function for a fixed size multi-dimensional array, by deriving
/// subscripts from GEP instructions. Returns true upon success and false
Expand Down
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