1 //===- TestInlining.cpp - Pass to inline calls in the test dialect --------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // TODO: This pass is only necessary because the main inlining pass
10 // has not abstracted away the call+callee relationship. When the inlining
11 // interface has this support, this pass should be removed.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "TestDialect.h"
16 #include "TestOps.h"
17 #include "mlir/Dialect/Func/IR/FuncOps.h"
18 #include "mlir/IR/BuiltinOps.h"
19 #include "mlir/IR/IRMapping.h"
20 #include "mlir/Pass/Pass.h"
21 #include "mlir/Transforms/InliningUtils.h"
22 #include "llvm/ADT/StringSet.h"
23
24 using namespace mlir;
25 using namespace test;
26
27 namespace {
28 struct Inliner : public PassWrapper<Inliner, OperationPass<func::FuncOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID__anon5d9f85410111::Inliner29 MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(Inliner)
30
31 StringRef getArgument() const final { return "test-inline"; }
getDescription__anon5d9f85410111::Inliner32 StringRef getDescription() const final {
33 return "Test inlining region calls";
34 }
35
runOnOperation__anon5d9f85410111::Inliner36 void runOnOperation() override {
37 auto function = getOperation();
38
39 // Collect each of the direct function calls within the module.
40 SmallVector<func::CallIndirectOp, 16> callers;
41 function.walk(
42 [&](func::CallIndirectOp caller) { callers.push_back(caller); });
43
44 // Build the inliner interface.
45 InlinerInterface interface(&getContext());
46
47 // Try to inline each of the call operations.
48 for (auto caller : callers) {
49 auto callee = dyn_cast_or_null<FunctionalRegionOp>(
50 caller.getCallee().getDefiningOp());
51 if (!callee)
52 continue;
53
54 // Inline the functional region operation, but only clone the internal
55 // region if there is more than one use.
56 if (failed(inlineRegion(
57 interface, &callee.getBody(), caller, caller.getArgOperands(),
58 caller.getResults(), caller.getLoc(),
59 /*shouldCloneInlinedRegion=*/!callee.getResult().hasOneUse())))
60 continue;
61
62 // If the inlining was successful then erase the call and callee if
63 // possible.
64 caller.erase();
65 if (callee.use_empty())
66 callee.erase();
67 }
68 }
69 };
70 } // namespace
71
72 namespace mlir {
73 namespace test {
registerInliner()74 void registerInliner() { PassRegistration<Inliner>(); }
75 } // namespace test
76 } // namespace mlir
77