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1// RUN: mlir-opt %s -canonicalize="test-convergence" --split-input-file | FileCheck %s2 3 4// CHECK-LABEL: func @merge_poison()5//       CHECK:   %[[RES:.*]] = ub.poison : i326//       CHECK:   return %[[RES]], %[[RES]]7func.func @merge_poison() -> (i32, i32) {8  %0 = ub.poison : i329  %1 = ub.poison : i3210  return %0, %1 : i32, i3211}12