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 no 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 "mlir/Dialect/StandardOps/IR/Ops.h"
17 #include "mlir/IR/BlockAndValueMapping.h"
18 #include "mlir/IR/BuiltinOps.h"
19 #include "mlir/Pass/Pass.h"
20 #include "mlir/Transforms/InliningUtils.h"
21 #include "mlir/Transforms/Passes.h"
22 #include "llvm/ADT/StringSet.h"
23
24 using namespace mlir;
25 using namespace mlir::test;
26
27 namespace {
28 struct Inliner : public PassWrapper<Inliner, FunctionPass> {
runOnFunction__anon68a90a860111::Inliner29 void runOnFunction() override {
30 auto function = getFunction();
31
32 // Collect each of the direct function calls within the module.
33 SmallVector<CallIndirectOp, 16> callers;
34 function.walk([&](CallIndirectOp caller) { callers.push_back(caller); });
35
36 // Build the inliner interface.
37 InlinerInterface interface(&getContext());
38
39 // Try to inline each of the call operations.
40 for (auto caller : callers) {
41 auto callee = dyn_cast_or_null<FunctionalRegionOp>(
42 caller.getCallee().getDefiningOp());
43 if (!callee)
44 continue;
45
46 // Inline the functional region operation, but only clone the internal
47 // region if there is more than one use.
48 if (failed(inlineRegion(
49 interface, &callee.body(), caller, caller.getArgOperands(),
50 caller.getResults(), caller.getLoc(),
51 /*shouldCloneInlinedRegion=*/!callee.getResult().hasOneUse())))
52 continue;
53
54 // If the inlining was successful then erase the call and callee if
55 // possible.
56 caller.erase();
57 if (callee.use_empty())
58 callee.erase();
59 }
60 }
61 };
62 } // end anonymous namespace
63
64 namespace mlir {
65 namespace test {
registerInliner()66 void registerInliner() {
67 PassRegistration<Inliner>("test-inline", "Test inlining region calls");
68 }
69 } // namespace test
70 } // namespace mlir
71