[mlir][SPIRV] Make test case more robust

This commit is in preparation of #108381, which changes the insertion point source materializations during a block type conversion slightly.

Author: matthias-springer

mlir/test/Conversion/VectorToSPIRV/vector-to-spirv.mlir

@@ -558,8 +558,8 @@ func.func @deinterleave(%a: vector<4xf32>) -> (vector<2xf32>, vector<2xf32>) {
 
 // CHECK-LABEL: func @deinterleave_scalar
 // CHECK-SAME: (%[[ARG0:.+]]: vector<2xf32>)
-//       CHECK: %[[EXTRACT0:.*]] = spirv.CompositeExtract %[[ARG0]][0 : i32] : vector<2xf32>
-//       CHECK: %[[EXTRACT1:.*]] = spirv.CompositeExtract %[[ARG0]][1 : i32] : vector<2xf32>
+//   CHECK-DAG: %[[EXTRACT0:.*]] = spirv.CompositeExtract %[[ARG0]][0 : i32] : vector<2xf32>
+//   CHECK-DAG: %[[EXTRACT1:.*]] = spirv.CompositeExtract %[[ARG0]][1 : i32] : vector<2xf32>
 //   CHECK-DAG: %[[CAST0:.*]] = builtin.unrealized_conversion_cast %[[EXTRACT0]] : f32 to vector<1xf32>
 //   CHECK-DAG: %[[CAST1:.*]] = builtin.unrealized_conversion_cast %[[EXTRACT1]] : f32 to vector<1xf32>
 //       CHECK: return %[[CAST0]], %[[CAST1]]