[MLIR][Affine]Fixed crash with invalid cachesize (Issue #64979)

Updated LoopTiling::runOnOperation() to signal pass failure incase the
set cachesize is invalid, i.e., less than or equal to zero.

 #64979 is the reporting issue.

Author: SwapnilGhanshyala

mlir/lib/Dialect/Affine/Transforms/LoopTiling.cpp

@@ -173,6 +173,12 @@ void LoopTiling::getTileSizes(ArrayRef<AffineForOp> band,
 }
 
 void LoopTiling::runOnOperation() {
+  if (cacheSizeInKiB <= 0) {
+    getOperation().emitError(
+        "illegal argument: '--affine-loop-tile=cache-size' cannot be "
+        "less than or equal to zero. \nAborted!");
+    return signalPassFailure();
+  }
   // Bands of loops to tile.
   std::vector<SmallVector<AffineForOp, 6>> bands;
   getTileableBands(getOperation(), &bands);