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(Oracle &O, Module &Program) {
18   if (!Program.getModuleIdentifier().empty() && !O.shouldKeep())
19     Program.setModuleIdentifier("");
20   if (!Program.getSourceFileName().empty() && !O.shouldKeep())
21     Program.setSourceFileName("");
22   if (!Program.getDataLayoutStr().empty() && !O.shouldKeep())
23     Program.setDataLayout("");
24   if (!Program.getTargetTriple().empty() && !O.shouldKeep())
25     Program.setTargetTriple("");
26   // TODO: clear line by line rather than all at once
27   if (!Program.getModuleInlineAsm().empty() && !O.shouldKeep())
28     Program.setModuleInlineAsm("");
29 }
30 
31 static int countModuleData(Module &M) {
32   int Count = 0;
33   if (!M.getModuleIdentifier().empty())
34     ++Count;
35   if (!M.getSourceFileName().empty())
36     ++Count;
37   if (!M.getDataLayoutStr().empty())
38     ++Count;
39   if (!M.getTargetTriple().empty())
40     ++Count;
41   if (!M.getModuleInlineAsm().empty())
42     ++Count;
43   return Count;
44 }
45 
46 void llvm::reduceModuleDataDeltaPass(TestRunner &Test) {
47   outs() << "*** Reducing Module Data...\n";
48   int Count = countModuleData(Test.getProgram());
49   runDeltaPass(Test, Count, clearModuleData);
50 }
51