forked from OSchip/llvm-project
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
//===- TestPasses.cpp - "buggy" passes used to test bugpoint --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains "buggy" passes that are used to test bugpoint, to check
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// that it is narrowing down testcases correctly.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/BasicBlock.h"
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#include "llvm/Constant.h"
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#include "llvm/Instructions.h"
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#include "llvm/Pass.h"
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#include "llvm/Type.h"
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#include "llvm/Support/InstVisitor.h"
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using namespace llvm;
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namespace {
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/// CrashOnCalls - This pass is used to test bugpoint. It intentionally
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/// crashes on any call instructions.
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class CrashOnCalls : public BasicBlockPass {
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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bool runOnBasicBlock(BasicBlock &BB) {
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for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
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if (isa<CallInst>(*I))
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abort();
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return false;
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}
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};
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RegisterPass<CrashOnCalls>
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X("bugpoint-crashcalls",
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"BugPoint Test Pass - Intentionally crash on CallInsts");
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}
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namespace {
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/// DeleteCalls - This pass is used to test bugpoint. It intentionally
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/// deletes some call instructions, "misoptimizing" the program.
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class DeleteCalls : public BasicBlockPass {
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bool runOnBasicBlock(BasicBlock &BB) {
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for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I)
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if (CallInst *CI = dyn_cast<CallInst>(I)) {
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if (!CI->use_empty())
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CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
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CI->getParent()->getInstList().erase(CI);
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break;
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}
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return false;
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}
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};
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RegisterPass<DeleteCalls>
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Y("bugpoint-deletecalls",
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"BugPoint Test Pass - Intentionally 'misoptimize' CallInsts");
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}
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