[mlir][transform] Guard parametric loop tiling pass from no option (llvm#118254)

`test-extract-fixed-outer-loops` pass always crash without any
`test-outer-loop-sizes` option. We need to keep the pass from crash by
checking the option existence.

Fix llvm#61716,
llvm#116360

---------

Co-authored-by: Mehdi Amini <[email protected]>

Author: Lewuathe

mlir/test/Transforms/invalid-outer-loop-size.mlir

@@ -0,0 +1,6 @@
+// RUN: not mlir-opt -test-extract-fixed-outer-loops %s 2>&1 | FileCheck %s
+
+func.func @no_crash(%arg0: memref<?x?xf32>) {
+  // CHECK: error: missing `test-outer-loop-sizes` pass-option for outer loop sizes
+  return
+}

mlir/test/lib/Dialect/SCF/TestLoopParametricTiling.cpp

@@ -40,6 +40,13 @@ class SimpleParametricLoopTilingPass
   }
 
   void runOnOperation() override {
+    if (sizes.empty()) {
+      emitError(
+          UnknownLoc::get(&getContext()),
+          "missing `test-outer-loop-sizes` pass-option for outer loop sizes");
+      signalPassFailure();
+      return;
+    }
     getOperation()->walk([this](scf::ForOp op) {
       // Ignore nested loops.
       if (op->getParentRegion()->getParentOfType<scf::ForOp>())