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https://github.com/c64scene-ar/llvm-6502.git
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55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
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//===- TestPasses.cpp - "buggy" passes used to test bugpoint --------------===//
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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/Pass.h"
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#include "llvm/iOther.h"
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#include "llvm/Support/InstVisitor.h"
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#include "llvm/Constant.h"
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#include "llvm/BasicBlock.h"
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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 all 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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}
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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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