1 // RUN: mlir-opt -test-target-materialization-with-no-uses -split-input-file %s | FileCheck %s
3 // The conversion is set up as follows:
4 // - type_changer ops are illegal;
5 // - type_changer ops are replaced with their operands;
6 // - i16 types are converted to i64 by the type conversion;
7 // - the rest of the types are legal.
8 // The first type_changer is replaced with its operand. For the pattern to
9 // apply to the second type_changer, the conversion infra creates a dummy
10 // cast operation to cast from the i32 to i64 because the original op takes an
11 // (illegal) i16 that became i64. This dummy operation should be replaced by
12 // the one produced by the target materialization hook. At the moment when the
13 // materialization decision is taken, the i64 replacement of the first type
14 // change (the result of the dummy cast) has no uses, but the value it replaces
15 // does, so the infra must call the materialization rather than assume the
16 // dummy cast to be dead.
20 %0 = "test.type_producer"() : () -> i32
22 // CHECK-NOT: test.type_changer
23 %1 = "test.type_changer"(%0) : (i32) -> i16
24 %2 = "test.type_changer"(%1) : (i16) -> i64
25 "test.type_consumer"(%2) : (i64) -> ()
31 // CHECK-LABEL: @direct_forward
32 func.func @direct_forward(%arg0 : i16) -> i16 {
34 %0 = "test.type_changer"(%arg0) : (i16) -> i16