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comparison tools/bugpoint-passes/TestPasses.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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-1:000000000000 0:95c75e76d11b
1 //===- TestPasses.cpp - "buggy" passes used to test bugpoint --------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains "buggy" passes that are used to test bugpoint, to check
11 // that it is narrowing down testcases correctly.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "llvm/IR/BasicBlock.h"
16 #include "llvm/IR/Constant.h"
17 #include "llvm/IR/Instructions.h"
18 #include "llvm/IR/Type.h"
19 #include "llvm/InstVisitor.h"
20 #include "llvm/Pass.h"
21
22 using namespace llvm;
23
24 namespace {
25 /// CrashOnCalls - This pass is used to test bugpoint. It intentionally
26 /// crashes on any call instructions.
27 class CrashOnCalls : public BasicBlockPass {
28 public:
29 static char ID; // Pass ID, replacement for typeid
30 CrashOnCalls() : BasicBlockPass(ID) {}
31 private:
32 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
33 AU.setPreservesAll();
34 }
35
36 bool runOnBasicBlock(BasicBlock &BB) {
37 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
38 if (isa<CallInst>(*I))
39 abort();
40
41 return false;
42 }
43 };
44 }
45
46 char CrashOnCalls::ID = 0;
47 static RegisterPass<CrashOnCalls>
48 X("bugpoint-crashcalls",
49 "BugPoint Test Pass - Intentionally crash on CallInsts");
50
51 namespace {
52 /// DeleteCalls - This pass is used to test bugpoint. It intentionally
53 /// deletes some call instructions, "misoptimizing" the program.
54 class DeleteCalls : public BasicBlockPass {
55 public:
56 static char ID; // Pass ID, replacement for typeid
57 DeleteCalls() : BasicBlockPass(ID) {}
58 private:
59 bool runOnBasicBlock(BasicBlock &BB) {
60 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
61 if (CallInst *CI = dyn_cast<CallInst>(I)) {
62 if (!CI->use_empty())
63 CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
64 CI->getParent()->getInstList().erase(CI);
65 break;
66 }
67 return false;
68 }
69 };
70 }
71
72 char DeleteCalls::ID = 0;
73 static RegisterPass<DeleteCalls>
74 Y("bugpoint-deletecalls",
75 "BugPoint Test Pass - Intentionally 'misoptimize' CallInsts");