1//===- ReduceFunctions.cpp - Specialized Delta Pass -----------------------===//
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// This file implements a function which calls the Generic Delta pass in order
10// to reduce function bodies in the provided Module.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ReduceFunctionBodies.h"
15#include "Utils.h"
16#include "llvm/IR/Instructions.h"
17
18using namespace llvm;
19
20/// Removes all the bodies of defined functions that aren't inside any of the
21/// desired Chunks.
22void llvm::reduceFunctionBodiesDeltaPass(Oracle &O, ReducerWorkItem &WorkItem) {
23 // Delete out-of-chunk function bodies
24 for (auto &F : WorkItem.getModule()) {
25 if (!F.isDeclaration() && !hasAliasUse(F) && !O.shouldKeep()) {
26 F.deleteBody();
27 F.setComdat(nullptr);
28 }
29 }
30}
31
32void llvm::reduceFunctionDataDeltaPass(Oracle &O, ReducerWorkItem &WorkItem) {
33 for (Function &F : WorkItem.getModule()) {
34 if (F.hasPersonalityFn()) {
35 if (none_of(Range&: F,
36 P: [](const BasicBlock &BB) {
37 return BB.isEHPad() || isa<ResumeInst>(Val: BB.getTerminator());
38 }) &&
39 !O.shouldKeep()) {
40 F.setPersonalityFn(nullptr);
41 }
42 }
43
44 if (F.hasPrefixData() && !O.shouldKeep())
45 F.setPrefixData(nullptr);
46
47 if (F.hasPrologueData() && !O.shouldKeep())
48 F.setPrologueData(nullptr);
49 }
50}
51