[Mlir-commits] [mlir] [MLIR] Fix a crash in CollapseLinalgDimensions (PR #181715)

[Darshan Bhat]

================
@@ -1348,6 +1348,10 @@ bool mlir::linalg::isDimSequencePreserved(AffineMap indexingMap,
 bool mlir::linalg::areDimSequencesPreserved(
     ArrayRef<AffineMap> maps, ArrayRef<ReassociationIndices> dimSequences) {
   return llvm::all_of(maps, [&](AffineMap map) {
+    // Dimension sequences can only be preserved in projected permutation maps.
+    if (!map.isProjectedPermutation()) {
----------------
darshan-opensource wrote:

There is already an assertion inside `isDimSequencesPreserved`. So it assumes that the input affineMap is already dimSequencePreserved. Do you want me to convert that assertion into a check and return false ?

https://github.com/llvm/llvm-project/pull/181715