forked from OSchip/llvm-project
127 lines
3.7 KiB
C++
127 lines
3.7 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 is distributed under the University of Illinois Open Source
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// 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/IR/BasicBlock.h"
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#include "llvm/IR/Constant.h"
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#include "llvm/IR/InstVisitor.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/Type.h"
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#include "llvm/Pass.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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public:
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static char ID; // Pass ID, replacement for typeid
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CrashOnCalls() : BasicBlockPass(ID) {}
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private:
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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bool runOnBasicBlock(BasicBlock &BB) override {
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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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}
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char CrashOnCalls::ID = 0;
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static RegisterPass<CrashOnCalls>
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X("bugpoint-crashcalls",
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"BugPoint Test Pass - Intentionally crash on CallInsts");
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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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public:
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static char ID; // Pass ID, replacement for typeid
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DeleteCalls() : BasicBlockPass(ID) {}
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private:
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bool runOnBasicBlock(BasicBlock &BB) override {
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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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}
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char DeleteCalls::ID = 0;
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static RegisterPass<DeleteCalls>
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Y("bugpoint-deletecalls",
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"BugPoint Test Pass - Intentionally 'misoptimize' CallInsts");
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namespace {
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/// CrashOnDeclFunc - This pass is used to test bugpoint. It intentionally
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/// crashes if the module has an undefined function (ie a function that is
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/// defined in an external module).
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class CrashOnDeclFunc : public ModulePass {
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public:
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static char ID; // Pass ID, replacement for typeid
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CrashOnDeclFunc() : ModulePass(ID) {}
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private:
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bool runOnModule(Module &M) override {
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for (auto &F : M.functions()) {
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if (F.isDeclaration())
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abort();
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}
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return false;
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}
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};
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}
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char CrashOnDeclFunc::ID = 0;
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static RegisterPass<CrashOnDeclFunc>
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Z("bugpoint-crash-decl-funcs",
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"BugPoint Test Pass - Intentionally crash on declared functions");
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#include <iostream>
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namespace {
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/// CrashOnOneCU - This pass is used to test bugpoint. It intentionally
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/// crashes if the Module has two or more compile units
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class CrashOnTooManyCUs : public ModulePass {
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public:
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static char ID;
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CrashOnTooManyCUs() : ModulePass(ID) {}
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private:
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bool runOnModule(Module &M) override {
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NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
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if (!CU_Nodes)
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return false;
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if (CU_Nodes->getNumOperands() >= 2)
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abort();
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return false;
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}
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};
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}
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char CrashOnTooManyCUs::ID = 0;
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static RegisterPass<CrashOnTooManyCUs>
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A("bugpoint-crash-too-many-cus",
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"BugPoint Test Pass - Intentionally crash on too many CUs");
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