1 //===- ReduceModuleData.cpp -----------------------------------------------===//
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 reduce pass to reduce various module data.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ReduceModuleData.h"
14 
15 using namespace llvm;
16 
17 static void clearModuleData(std::vector<Chunk> ChunksToKeep, Module *Program) {
18   Oracle O(ChunksToKeep);
19 
20   if (!Program->getModuleIdentifier().empty() && !O.shouldKeep())
21     Program->setModuleIdentifier("");
22   if (!Program->getSourceFileName().empty() && !O.shouldKeep())
23     Program->setSourceFileName("");
24   if (!Program->getDataLayoutStr().empty() && !O.shouldKeep())
25     Program->setDataLayout("");
26   if (!Program->getTargetTriple().empty() && !O.shouldKeep())
27     Program->setTargetTriple("");
28   // TODO: clear line by line rather than all at once
29   if (!Program->getModuleInlineAsm().empty() && !O.shouldKeep())
30     Program->setModuleInlineAsm("");
31 }
32 
33 static int countModuleData(Module *M) {
34   int Count = 0;
35   if (!M->getModuleIdentifier().empty())
36     ++Count;
37   if (!M->getSourceFileName().empty())
38     ++Count;
39   if (!M->getDataLayoutStr().empty())
40     ++Count;
41   if (!M->getTargetTriple().empty())
42     ++Count;
43   if (!M->getModuleInlineAsm().empty())
44     ++Count;
45   return Count;
46 }
47 
48 void llvm::reduceModuleDataDeltaPass(TestRunner &Test) {
49   outs() << "*** Reducing Module Data...\n";
50   int Count = countModuleData(Test.getProgram());
51   runDeltaPass(Test, Count, clearModuleData);
52 }
53