[all-commits] [llvm/llvm-project] cee1c3: [mlir][tosa] Limit consecutive concat rewrite to M...

[Luke Hutton via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cee1c3ba576fc6259510313b73fde56150268c52
      https://github.com/llvm/llvm-project/commit/cee1c3ba576fc6259510313b73fde56150268c52
  Author: Luke Hutton <luke.hutton at arm.com>
  Date:   2026-05-28 (Thu, 28 May 2026)

  Changed paths:
    M mlir/include/mlir/Dialect/Tosa/IR/TargetEnv.h
    M mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td
    M mlir/lib/Dialect/Tosa/IR/TargetEnv.cpp
    M mlir/lib/Dialect/Tosa/IR/TosaCanonicalizations.cpp
    M mlir/test/Dialect/Tosa/canonicalize.mlir
    R mlir/test/Dialect/Tosa/fold_concats.mlir

  Log Message:
  -----------
  [mlir][tosa] Limit consecutive concat rewrite to MAX_TENSOR_LIST_SIZE (#199051)

Previously folding could produce an operation that would later be
considered invalid in validation due to the number of operands it has.
This change adds a check to prevent rewriting consecutive concat
operations if the resulting operation has more than MAX_TENSOR_LIST_SIZE
operands, based on the selected target environment level. If no level is
specified, folding will proceed as before.

In addition, this change rewrites the concat folder as a
canonicalization pattern, since it is not a fold of constant operands.
The change also consolidates testing in
canonicalize.mlir.



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