Add meaningful variable names in lit test.

Author: sahas3

mlir/test/Conversion/TosaToLinalg/tosa-to-linalg.mlir

@@ -1938,18 +1938,18 @@ func.func @test_dynamic_fft2d(%arg0: tensor<?x?x?xf32>, %arg1: tensor<?x?x?xf32>
 
 // CHECK-LABEL:   func.func @test_cast_fp32_i64(
 // CHECK-SAME:                                  %[[ARG0:.*]]: tensor<1xf32>) -> tensor<1xi64> {
-// CHECK:           %[[VAL_0:.*]] = tensor.empty() : tensor<1xi64>
-// CHECK:           %[[RESULT:.*]] = linalg.generic {indexing_maps = [#[[$MAP0]], #[[$MAP1]]], iterator_types = ["parallel"]} ins(%[[ARG0]] : tensor<1xf32>) outs(%[[VAL_0]] : tensor<1xi64>) {
-// CHECK:           ^bb0(%[[VAL_2:.*]]: f32, %[[VAL_3:.*]]: i64):
-// CHECK:             %[[VAL_4:.*]] = math.roundeven %[[VAL_2]] : f32
-// CHECK:             %[[VAL_5:.*]] = arith.constant -9.22337203E+18 : f32
-// CHECK:             %[[VAL_6:.*]] = arith.constant 9.22337203E+18 : f32
-// CHECK:             %[[VAL_7:.*]] = arith.constant 9223372036854775807 : i64
-// CHECK:             %[[VAL_8:.*]] = arith.maximumf %[[VAL_4]], %[[VAL_5]] : f32
-// CHECK:             %[[VAL_9:.*]] = arith.fptosi %[[VAL_8]] : f32 to i64
-// CHECK:             %[[VAL_10:.*]] = arith.cmpf uge, %[[VAL_4]], %[[VAL_6]] : f32
-// CHECK:             %[[VAL_11:.*]] = arith.select %[[VAL_10]], %[[VAL_7]], %[[VAL_9]] : i64
-// CHECK:             linalg.yield %[[VAL_11]] : i64
+// CHECK:           %[[EMPTY_TENSOR:.*]] = tensor.empty() : tensor<1xi64>
+// CHECK:           %[[RESULT:.*]] = linalg.generic {indexing_maps = [#[[$MAP0]], #[[$MAP1]]], iterator_types = ["parallel"]} ins(%[[ARG0]] : tensor<1xf32>) outs(%[[EMPTY_TENSOR]] : tensor<1xi64>) {
+// CHECK:           ^bb0(%[[IN:.*]]: f32, %[[OUT:.*]]: i64):
+// CHECK:             %[[ROUND_EVEN:.*]] = math.roundeven %[[IN]] : f32
+// CHECK:             %[[FP_INT_MIN:.*]] = arith.constant -9.22337203E+18 : f32
+// CHECK:             %[[FP_INT_MAX_PLUS_ONE:.*]] = arith.constant 9.22337203E+18 : f32
+// CHECK:             %[[INT_MAX:.*]] = arith.constant 9223372036854775807 : i64
+// CHECK:             %[[MAX:.*]] = arith.maximumf %[[ROUND_EVEN]], %[[FP_INT_MIN]] : f32
+// CHECK:             %[[FPTOSI:.*]] = arith.fptosi %[[MAX]] : f32 to i64
+// CHECK:             %[[CMPF:.*]] = arith.cmpf uge, %[[ROUND_EVEN]], %[[FP_INT_MAX_PLUS_ONE]] : f32
+// CHECK:             %[[SELECT:.*]] = arith.select %[[CMPF]], %[[INT_MAX]], %[[FPTOSI]] : i64
+// CHECK:             linalg.yield %[[SELECT]] : i64
 // CHECK:           } -> tensor<1xi64>
 // CHECK:           return %[[RESULT]] : tensor<1xi64>
 func.func @test_cast_fp32_i64(%arg0: tensor<1xf32>) -> (tensor<1xi64>) {