1// RUN: mlir-opt -test-patterns %s | FileCheck %s
2
3func @foo() -> i32 {
4  %c42 = arith.constant 42 : i32
5
6  // The new operation should be present in the output and contain an attribute
7  // with value "42" that results from folding.
8
9  // CHECK: "test.op_in_place_fold"(%{{.*}}) {attr = 42 : i32}
10  %0 = "test.op_in_place_fold_anchor"(%c42) : (i32) -> (i32)
11  return %0 : i32
12}
13
14func @test_fold_before_previously_folded_op() -> (i32, i32) {
15  // When folding two constants will be generated and uniqued. Check that the
16  // uniqued constant properly dominates both uses.
17  // CHECK: %[[CST:.+]] = arith.constant true
18  // CHECK-NEXT: "test.cast"(%[[CST]]) : (i1) -> i32
19  // CHECK-NEXT: "test.cast"(%[[CST]]) : (i1) -> i32
20
21  %0 = "test.cast"() {test_fold_before_previously_folded_op} : () -> (i32)
22  %1 = "test.cast"() {test_fold_before_previously_folded_op} : () -> (i32)
23  return %0, %1 : i32, i32
24}
25