1 // RUN: mlir-opt -test-greedy-patterns='top-down=false' %s | FileCheck %s
2 // RUN: mlir-opt -test-greedy-patterns='top-down=true' %s | FileCheck %s
4 func.func @foo() -> i32 {
5 %c42 = arith.constant 42 : i32
7 // The new operation should be present in the output and contain an attribute
8 // with value "42" that results from folding.
10 // CHECK: "test.op_in_place_fold"(%{{.*}}) <{attr = 42 : i32}
11 %0 = "test.op_in_place_fold_anchor"(%c42) : (i32) -> (i32)
15 func.func @test_fold_before_previously_folded_op() -> (i32, i32) {
16 // When folding two constants will be generated and uniqued. Check that the
17 // uniqued constant properly dominates both uses.
18 // CHECK: %[[CST:.+]] = arith.constant true
19 // CHECK-NEXT: "test.cast"(%[[CST]]) : (i1) -> i32
20 // CHECK-NEXT: "test.cast"(%[[CST]]) : (i1) -> i32
22 %0 = "test.cast"() {test_fold_before_previously_folded_op} : () -> (i32)
23 %1 = "test.cast"() {test_fold_before_previously_folded_op} : () -> (i32)
24 return %0, %1 : i32, i32
27 func.func @test_dont_reorder_constants() -> (i32, i32, i32) {
28 // Test that we don't reorder existing constants during folding if it isn't necessary.
29 // CHECK: %[[CST:.+]] = arith.constant 1
30 // CHECK-NEXT: %[[CST:.+]] = arith.constant 2
31 // CHECK-NEXT: %[[CST:.+]] = arith.constant 3
32 %0 = arith.constant 1 : i32
33 %1 = arith.constant 2 : i32
34 %2 = arith.constant 3 : i32
35 return %0, %1, %2 : i32, i32, i32