1 //===- TestPasses.cpp - "buggy" passes used to test bugpoint --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains "buggy" passes that are used to test bugpoint, to check
11 // that it is narrowing down testcases correctly.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/BasicBlock.h"
16 #include "llvm/Constant.h"
17 #include "llvm/Instructions.h"
18 #include "llvm/Pass.h"
19 #include "llvm/Type.h"
20 #include "llvm/Support/InstVisitor.h"
25 /// CrashOnCalls - This pass is used to test bugpoint. It intentionally
26 /// crashes on any call instructions.
27 class CrashOnCalls : public BasicBlockPass {
28 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
32 bool runOnBasicBlock(BasicBlock &BB) {
33 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
34 if (isa<CallInst>(*I))
41 RegisterPass<CrashOnCalls>
42 X("bugpoint-crashcalls",
43 "BugPoint Test Pass - Intentionally crash on CallInsts");
47 /// DeleteCalls - This pass is used to test bugpoint. It intentionally
48 /// deletes some call instructions, "misoptimizing" the program.
49 class DeleteCalls : public BasicBlockPass {
50 bool runOnBasicBlock(BasicBlock &BB) {
51 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
52 if (CallInst *CI = dyn_cast<CallInst>(I)) {
54 CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
55 CI->getParent()->getInstList().erase(CI);
62 RegisterPass<DeleteCalls>
63 Y("bugpoint-deletecalls",
64 "BugPoint Test Pass - Intentionally 'misoptimize' CallInsts");