mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 18:29:46 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151680 91177308-0d34-0410-b5e6-96231b3b80d8
673 lines
22 KiB
C++
673 lines
22 KiB
C++
//===-- llvm-stress.cpp - Generate random LL files to stress-test LLVM ----===//
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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 program is a utility that generates random .ll files to stress-test
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// different components in LLVM.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/PassManager.h"
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#include "llvm/Constants.h"
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#include "llvm/Instruction.h"
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#include "llvm/CallGraphSCCPass.h"
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#include "llvm/Assembly/PrintModulePass.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Support/PassNameParser.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include <memory>
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#include <sstream>
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#include <set>
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#include <vector>
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#include <algorithm>
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using namespace llvm;
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static cl::opt<unsigned> SeedCL("seed",
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cl::desc("Seed used for randomness"), cl::init(0));
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static cl::opt<unsigned> SizeCL("size",
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cl::desc("The estimated size of the generated function (# of instrs)"),
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cl::init(100));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"),
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cl::value_desc("filename"));
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static cl::opt<bool> GenHalfFloat("generate-half-float",
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cl::desc("Generate half-length floating-point values"), cl::init(false));
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static cl::opt<bool> GenX86FP80("generate-x86-fp80",
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cl::desc("Generate 80-bit X86 floating-point values"), cl::init(false));
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static cl::opt<bool> GenFP128("generate-fp128",
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cl::desc("Generate 128-bit floating-point values"), cl::init(false));
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static cl::opt<bool> GenPPCFP128("generate-ppc-fp128",
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cl::desc("Generate 128-bit PPC floating-point values"), cl::init(false));
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static cl::opt<bool> GenX86MMX("generate-x86-mmx",
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cl::desc("Generate X86 MMX floating-point values"), cl::init(false));
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/// A utility class to provide a pseudo-random number generator which is
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/// the same across all platforms. This is somewhat close to the libc
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/// implementation. Note: This is not a cryptographically secure pseudorandom
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/// number generator.
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class Random {
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public:
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/// C'tor
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Random(unsigned _seed):Seed(_seed) {}
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/// Return the next random value.
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unsigned Rand() {
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unsigned Val = Seed + 0x000b07a1;
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Seed = (Val * 0x3c7c0ac1);
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// Only lowest 19 bits are random-ish.
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return Seed & 0x7ffff;
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}
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private:
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unsigned Seed;
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};
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/// Generate an empty function with a default argument list.
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Function *GenEmptyFunction(Module *M) {
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// Type Definitions
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std::vector<Type*> ArgsTy;
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// Define a few arguments
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LLVMContext &Context = M->getContext();
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ArgsTy.push_back(PointerType::get(IntegerType::getInt8Ty(Context), 0));
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ArgsTy.push_back(PointerType::get(IntegerType::getInt32Ty(Context), 0));
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ArgsTy.push_back(PointerType::get(IntegerType::getInt64Ty(Context), 0));
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ArgsTy.push_back(IntegerType::getInt32Ty(Context));
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ArgsTy.push_back(IntegerType::getInt64Ty(Context));
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ArgsTy.push_back(IntegerType::getInt8Ty(Context));
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FunctionType *FuncTy = FunctionType::get(Type::getVoidTy(Context), ArgsTy, 0);
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// Pick a unique name to describe the input parameters
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std::stringstream ss;
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ss<<"autogen_SD"<<SeedCL;
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Function *Func = Function::Create(FuncTy, GlobalValue::ExternalLinkage,
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ss.str(), M);
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Func->setCallingConv(CallingConv::C);
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return Func;
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}
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/// A base class, implementing utilities needed for
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/// modifying and adding new random instructions.
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struct Modifier {
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/// Used to store the randomly generated values.
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typedef std::vector<Value*> PieceTable;
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public:
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/// C'tor
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Modifier(BasicBlock *Block, PieceTable *PT, Random *R):
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BB(Block),PT(PT),Ran(R),Context(BB->getContext()) {}
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/// Add a new instruction.
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virtual void Act() = 0;
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/// Add N new instructions,
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virtual void ActN(unsigned n) {
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for (unsigned i=0; i<n; ++i)
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Act();
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}
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protected:
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/// Return a random value from the list of known values.
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Value *getRandomVal() {
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assert(PT->size());
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return PT->at(Ran->Rand() % PT->size());
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}
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Constant *getRandomConstant(Type *Tp) {
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if (Tp->isIntegerTy()) {
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if (Ran->Rand() & 1)
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return ConstantInt::getAllOnesValue(Tp);
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return ConstantInt::getNullValue(Tp);
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} else if (Tp->isFloatingPointTy()) {
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if (Ran->Rand() & 1)
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return ConstantFP::getAllOnesValue(Tp);
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return ConstantFP::getNullValue(Tp);
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}
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return UndefValue::get(Tp);
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}
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/// Return a random value with a known type.
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Value *getRandomValue(Type *Tp) {
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unsigned index = Ran->Rand();
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for (unsigned i=0; i<PT->size(); ++i) {
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Value *V = PT->at((index + i) % PT->size());
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if (V->getType() == Tp)
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return V;
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}
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// If the requested type was not found, generate a constant value.
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if (Tp->isIntegerTy()) {
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if (Ran->Rand() & 1)
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return ConstantInt::getAllOnesValue(Tp);
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return ConstantInt::getNullValue(Tp);
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} else if (Tp->isFloatingPointTy()) {
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if (Ran->Rand() & 1)
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return ConstantFP::getAllOnesValue(Tp);
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return ConstantFP::getNullValue(Tp);
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} else if (Tp->isVectorTy()) {
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VectorType *VTp = cast<VectorType>(Tp);
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std::vector<Constant*> TempValues;
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TempValues.reserve(VTp->getNumElements());
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for (unsigned i = 0; i < VTp->getNumElements(); ++i)
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TempValues.push_back(getRandomConstant(VTp->getScalarType()));
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ArrayRef<Constant*> VectorValue(TempValues);
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return ConstantVector::get(VectorValue);
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}
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return UndefValue::get(Tp);
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}
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/// Return a random value of any pointer type.
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Value *getRandomPointerValue() {
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unsigned index = Ran->Rand();
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for (unsigned i=0; i<PT->size(); ++i) {
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Value *V = PT->at((index + i) % PT->size());
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if (V->getType()->isPointerTy())
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return V;
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}
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return UndefValue::get(pickPointerType());
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}
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/// Return a random value of any vector type.
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Value *getRandomVectorValue() {
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unsigned index = Ran->Rand();
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for (unsigned i=0; i<PT->size(); ++i) {
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Value *V = PT->at((index + i) % PT->size());
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if (V->getType()->isVectorTy())
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return V;
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}
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return UndefValue::get(pickVectorType());
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}
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/// Pick a random type.
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Type *pickType() {
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return (Ran->Rand() & 1 ? pickVectorType() : pickScalarType());
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}
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/// Pick a random pointer type.
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Type *pickPointerType() {
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Type *Ty = pickType();
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return PointerType::get(Ty, 0);
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}
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/// Pick a random vector type.
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Type *pickVectorType(unsigned len = (unsigned)-1) {
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Type *Ty = pickScalarType();
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// Pick a random vector width in the range 2**0 to 2**4.
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// by adding two randoms we are generating a normal-like distribution
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// around 2**3.
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unsigned width = 1<<((Ran->Rand() % 3) + (Ran->Rand() % 3));
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if (len != (unsigned)-1)
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width = len;
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return VectorType::get(Ty, width);
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}
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/// Pick a random scalar type.
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Type *pickScalarType() {
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Type *t = 0;
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do {
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switch (Ran->Rand() % 30) {
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case 0: t = Type::getInt1Ty(Context); break;
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case 1: t = Type::getInt8Ty(Context); break;
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case 2: t = Type::getInt16Ty(Context); break;
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case 3: case 4:
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case 5: t = Type::getFloatTy(Context); break;
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case 6: case 7:
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case 8: t = Type::getDoubleTy(Context); break;
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case 9: case 10:
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case 11: t = Type::getInt32Ty(Context); break;
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case 12: case 13:
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case 14: t = Type::getInt64Ty(Context); break;
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case 15: case 16:
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case 17: if (GenHalfFloat) t = Type::getHalfTy(Context); break;
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case 18: case 19:
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case 20: if (GenX86FP80) t = Type::getX86_FP80Ty(Context); break;
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case 21: case 22:
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case 23: if (GenFP128) t = Type::getFP128Ty(Context); break;
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case 24: case 25:
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case 26: if (GenPPCFP128) t = Type::getPPC_FP128Ty(Context); break;
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case 27: case 28:
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case 29: if (GenX86MMX) t = Type::getX86_MMXTy(Context); break;
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default: llvm_unreachable("Invalid scalar value");
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}
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} while (t == 0);
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return t;
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}
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/// Basic block to populate
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BasicBlock *BB;
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/// Value table
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PieceTable *PT;
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/// Random number generator
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Random *Ran;
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/// Context
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LLVMContext &Context;
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};
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struct LoadModifier: public Modifier {
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LoadModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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// Try to use predefined pointers. If non exist, use undef pointer value;
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Value *Ptr = getRandomPointerValue();
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Value *V = new LoadInst(Ptr, "L", BB->getTerminator());
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PT->push_back(V);
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}
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};
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struct StoreModifier: public Modifier {
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StoreModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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// Try to use predefined pointers. If non exist, use undef pointer value;
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Value *Ptr = getRandomPointerValue();
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Type *Tp = Ptr->getType();
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Value *Val = getRandomValue(Tp->getContainedType(0));
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Type *ValTy = Val->getType();
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// Do not store vectors of i1s because they are unsupported
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// by the codegen.
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if (ValTy->isVectorTy() && ValTy->getScalarSizeInBits() == 1)
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return;
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new StoreInst(Val, Ptr, BB->getTerminator());
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}
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};
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struct BinModifier: public Modifier {
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BinModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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Value *Val0 = getRandomVal();
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Value *Val1 = getRandomValue(Val0->getType());
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// Don't handle pointer types.
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if (Val0->getType()->isPointerTy() ||
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Val1->getType()->isPointerTy())
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return;
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// Don't handle i1 types.
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if (Val0->getType()->getScalarSizeInBits() == 1)
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return;
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bool isFloat = Val0->getType()->getScalarType()->isFloatingPointTy();
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Instruction* Term = BB->getTerminator();
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unsigned R = Ran->Rand() % (isFloat ? 7 : 13);
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Instruction::BinaryOps Op;
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switch (R) {
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default: llvm_unreachable("Invalid BinOp");
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case 0:{Op = (isFloat?Instruction::FAdd : Instruction::Add); break; }
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case 1:{Op = (isFloat?Instruction::FSub : Instruction::Sub); break; }
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case 2:{Op = (isFloat?Instruction::FMul : Instruction::Mul); break; }
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case 3:{Op = (isFloat?Instruction::FDiv : Instruction::SDiv); break; }
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case 4:{Op = (isFloat?Instruction::FDiv : Instruction::UDiv); break; }
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case 5:{Op = (isFloat?Instruction::FRem : Instruction::SRem); break; }
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case 6:{Op = (isFloat?Instruction::FRem : Instruction::URem); break; }
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case 7: {Op = Instruction::Shl; break; }
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case 8: {Op = Instruction::LShr; break; }
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case 9: {Op = Instruction::AShr; break; }
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case 10:{Op = Instruction::And; break; }
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case 11:{Op = Instruction::Or; break; }
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case 12:{Op = Instruction::Xor; break; }
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}
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PT->push_back(BinaryOperator::Create(Op, Val0, Val1, "B", Term));
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}
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};
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/// Generate constant values.
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struct ConstModifier: public Modifier {
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ConstModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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Type *Ty = pickType();
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if (Ty->isVectorTy()) {
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switch (Ran->Rand() % 2) {
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case 0: if (Ty->getScalarType()->isIntegerTy())
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return PT->push_back(ConstantVector::getAllOnesValue(Ty));
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case 1: if (Ty->getScalarType()->isIntegerTy())
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return PT->push_back(ConstantVector::getNullValue(Ty));
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}
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}
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if (Ty->isFloatingPointTy()) {
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if (Ran->Rand() & 1)
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return PT->push_back(ConstantFP::getNullValue(Ty));
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return PT->push_back(ConstantFP::get(Ty,
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static_cast<double>(1)/Ran->Rand()));
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}
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if (Ty->isIntegerTy()) {
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switch (Ran->Rand() % 7) {
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case 0: if (Ty->isIntegerTy())
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return PT->push_back(ConstantInt::get(Ty,
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APInt::getAllOnesValue(Ty->getPrimitiveSizeInBits())));
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case 1: if (Ty->isIntegerTy())
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return PT->push_back(ConstantInt::get(Ty,
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APInt::getNullValue(Ty->getPrimitiveSizeInBits())));
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case 2: case 3: case 4: case 5:
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case 6: if (Ty->isIntegerTy())
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PT->push_back(ConstantInt::get(Ty, Ran->Rand()));
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}
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}
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}
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};
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struct AllocaModifier: public Modifier {
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AllocaModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R){}
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virtual void Act() {
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Type *Tp = pickType();
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PT->push_back(new AllocaInst(Tp, "A", BB->getFirstNonPHI()));
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}
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};
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struct ExtractElementModifier: public Modifier {
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ExtractElementModifier(BasicBlock *BB, PieceTable *PT, Random *R):
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Modifier(BB, PT, R) {}
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virtual void Act() {
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Value *Val0 = getRandomVectorValue();
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Value *V = ExtractElementInst::Create(Val0,
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ConstantInt::get(Type::getInt32Ty(BB->getContext()),
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Ran->Rand() % cast<VectorType>(Val0->getType())->getNumElements()),
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"E", BB->getTerminator());
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return PT->push_back(V);
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}
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};
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struct ShuffModifier: public Modifier {
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ShuffModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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Value *Val0 = getRandomVectorValue();
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Value *Val1 = getRandomValue(Val0->getType());
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unsigned Width = cast<VectorType>(Val0->getType())->getNumElements();
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std::vector<Constant*> Idxs;
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Type *I32 = Type::getInt32Ty(BB->getContext());
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for (unsigned i=0; i<Width; ++i) {
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Constant *CI = ConstantInt::get(I32, Ran->Rand() % (Width*2));
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// Pick some undef values.
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if (!(Ran->Rand() % 5))
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CI = UndefValue::get(I32);
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Idxs.push_back(CI);
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}
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Constant *Mask = ConstantVector::get(Idxs);
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Value *V = new ShuffleVectorInst(Val0, Val1, Mask, "Shuff",
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BB->getTerminator());
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PT->push_back(V);
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}
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};
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struct InsertElementModifier: public Modifier {
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InsertElementModifier(BasicBlock *BB, PieceTable *PT, Random *R):
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Modifier(BB, PT, R) {}
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virtual void Act() {
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Value *Val0 = getRandomVectorValue();
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Value *Val1 = getRandomValue(Val0->getType()->getScalarType());
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Value *V = InsertElementInst::Create(Val0, Val1,
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ConstantInt::get(Type::getInt32Ty(BB->getContext()),
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Ran->Rand() % cast<VectorType>(Val0->getType())->getNumElements()),
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"I", BB->getTerminator());
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return PT->push_back(V);
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}
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};
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struct CastModifier: public Modifier {
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CastModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
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virtual void Act() {
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Value *V = getRandomVal();
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Type *VTy = V->getType();
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Type *DestTy = pickScalarType();
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// Handle vector casts vectors.
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if (VTy->isVectorTy()) {
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VectorType *VecTy = cast<VectorType>(VTy);
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DestTy = pickVectorType(VecTy->getNumElements());
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}
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// no need to casr.
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if (VTy == DestTy) return;
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// Pointers:
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if (VTy->isPointerTy()) {
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if (!DestTy->isPointerTy())
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DestTy = PointerType::get(DestTy, 0);
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return PT->push_back(
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new BitCastInst(V, DestTy, "PC", BB->getTerminator()));
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}
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// Generate lots of bitcasts.
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if ((Ran->Rand() & 1) &&
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VTy->getPrimitiveSizeInBits() == DestTy->getPrimitiveSizeInBits()) {
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return PT->push_back(
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new BitCastInst(V, DestTy, "BC", BB->getTerminator()));
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}
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// Both types are integers:
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if (VTy->getScalarType()->isIntegerTy() &&
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DestTy->getScalarType()->isIntegerTy()) {
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if (VTy->getScalarType()->getPrimitiveSizeInBits() >
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DestTy->getScalarType()->getPrimitiveSizeInBits()) {
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return PT->push_back(
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new TruncInst(V, DestTy, "Tr", BB->getTerminator()));
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} else {
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if (Ran->Rand() & 1)
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return PT->push_back(
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new ZExtInst(V, DestTy, "ZE", BB->getTerminator()));
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return PT->push_back(new SExtInst(V, DestTy, "Se", BB->getTerminator()));
|
|
}
|
|
}
|
|
|
|
// Fp to int.
|
|
if (VTy->getScalarType()->isFloatingPointTy() &&
|
|
DestTy->getScalarType()->isIntegerTy()) {
|
|
if (Ran->Rand() & 1)
|
|
return PT->push_back(
|
|
new FPToSIInst(V, DestTy, "FC", BB->getTerminator()));
|
|
return PT->push_back(new FPToUIInst(V, DestTy, "FC", BB->getTerminator()));
|
|
}
|
|
|
|
// Int to fp.
|
|
if (VTy->getScalarType()->isIntegerTy() &&
|
|
DestTy->getScalarType()->isFloatingPointTy()) {
|
|
if (Ran->Rand() & 1)
|
|
return PT->push_back(
|
|
new SIToFPInst(V, DestTy, "FC", BB->getTerminator()));
|
|
return PT->push_back(new UIToFPInst(V, DestTy, "FC", BB->getTerminator()));
|
|
|
|
}
|
|
|
|
// Both floats.
|
|
if (VTy->getScalarType()->isFloatingPointTy() &&
|
|
DestTy->getScalarType()->isFloatingPointTy()) {
|
|
if (VTy->getScalarType()->getPrimitiveSizeInBits() >
|
|
DestTy->getScalarType()->getPrimitiveSizeInBits()) {
|
|
return PT->push_back(
|
|
new FPTruncInst(V, DestTy, "Tr", BB->getTerminator()));
|
|
} else {
|
|
return PT->push_back(
|
|
new FPExtInst(V, DestTy, "ZE", BB->getTerminator()));
|
|
}
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
struct SelectModifier: public Modifier {
|
|
SelectModifier(BasicBlock *BB, PieceTable *PT, Random *R):
|
|
Modifier(BB, PT, R) {}
|
|
|
|
virtual void Act() {
|
|
// Try a bunch of different select configuration until a valid one is found.
|
|
Value *Val0 = getRandomVal();
|
|
Value *Val1 = getRandomValue(Val0->getType());
|
|
|
|
Type *CondTy = Type::getInt1Ty(Context);
|
|
|
|
// If the value type is a vector, and we allow vector select, then in 50%
|
|
// of the cases generate a vector select.
|
|
if (Val0->getType()->isVectorTy() && (Ran->Rand() % 1)) {
|
|
unsigned NumElem = cast<VectorType>(Val0->getType())->getNumElements();
|
|
CondTy = VectorType::get(CondTy, NumElem);
|
|
}
|
|
|
|
Value *Cond = getRandomValue(CondTy);
|
|
Value *V = SelectInst::Create(Cond, Val0, Val1, "Sl", BB->getTerminator());
|
|
return PT->push_back(V);
|
|
}
|
|
};
|
|
|
|
|
|
struct CmpModifier: public Modifier {
|
|
CmpModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
|
|
virtual void Act() {
|
|
|
|
Value *Val0 = getRandomVal();
|
|
Value *Val1 = getRandomValue(Val0->getType());
|
|
|
|
if (Val0->getType()->isPointerTy()) return;
|
|
bool fp = Val0->getType()->getScalarType()->isFloatingPointTy();
|
|
|
|
int op;
|
|
if (fp) {
|
|
op = Ran->Rand() %
|
|
(CmpInst::LAST_FCMP_PREDICATE - CmpInst::FIRST_FCMP_PREDICATE) +
|
|
CmpInst::FIRST_FCMP_PREDICATE;
|
|
} else {
|
|
op = Ran->Rand() %
|
|
(CmpInst::LAST_ICMP_PREDICATE - CmpInst::FIRST_ICMP_PREDICATE) +
|
|
CmpInst::FIRST_ICMP_PREDICATE;
|
|
}
|
|
|
|
Value *V = CmpInst::Create(fp ? Instruction::FCmp : Instruction::ICmp,
|
|
op, Val0, Val1, "Cmp", BB->getTerminator());
|
|
return PT->push_back(V);
|
|
}
|
|
};
|
|
|
|
void FillFunction(Function *F) {
|
|
// Create a legal entry block.
|
|
BasicBlock *BB = BasicBlock::Create(F->getContext(), "BB", F);
|
|
ReturnInst::Create(F->getContext(), BB);
|
|
|
|
// Create the value table.
|
|
Modifier::PieceTable PT;
|
|
// Pick an initial seed value
|
|
Random R(SeedCL);
|
|
|
|
// Consider arguments as legal values.
|
|
for (Function::arg_iterator it = F->arg_begin(), e = F->arg_end();
|
|
it != e; ++it)
|
|
PT.push_back(it);
|
|
|
|
// List of modifiers which add new random instructions.
|
|
std::vector<Modifier*> Modifiers;
|
|
std::auto_ptr<Modifier> LM(new LoadModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> SM(new StoreModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> EE(new ExtractElementModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> SHM(new ShuffModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> IE(new InsertElementModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> BM(new BinModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> CM(new CastModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> SLM(new SelectModifier(BB, &PT, &R));
|
|
std::auto_ptr<Modifier> PM(new CmpModifier(BB, &PT, &R));
|
|
Modifiers.push_back(LM.get());
|
|
Modifiers.push_back(SM.get());
|
|
Modifiers.push_back(EE.get());
|
|
Modifiers.push_back(SHM.get());
|
|
Modifiers.push_back(IE.get());
|
|
Modifiers.push_back(BM.get());
|
|
Modifiers.push_back(CM.get());
|
|
Modifiers.push_back(SLM.get());
|
|
Modifiers.push_back(PM.get());
|
|
|
|
// Generate the random instructions
|
|
AllocaModifier AM(BB, &PT, &R); AM.ActN(5); // Throw in a few allocas
|
|
ConstModifier COM(BB, &PT, &R); COM.ActN(40); // Throw in a few constants
|
|
|
|
for (unsigned i=0; i< SizeCL / Modifiers.size(); ++i)
|
|
for (std::vector<Modifier*>::iterator it = Modifiers.begin(),
|
|
e = Modifiers.end(); it != e; ++it) {
|
|
(*it)->Act();
|
|
}
|
|
|
|
SM->ActN(5); // Throw in a few stores.
|
|
}
|
|
|
|
void IntroduceControlFlow(Function *F) {
|
|
std::set<Instruction*> BoolInst;
|
|
for (BasicBlock::iterator it = F->begin()->begin(),
|
|
e = F->begin()->end(); it != e; ++it) {
|
|
if (it->getType() == IntegerType::getInt1Ty(F->getContext()))
|
|
BoolInst.insert(it);
|
|
}
|
|
|
|
for (std::set<Instruction*>::iterator it = BoolInst.begin(),
|
|
e = BoolInst.end(); it != e; ++it) {
|
|
Instruction *Instr = *it;
|
|
BasicBlock *Curr = Instr->getParent();
|
|
BasicBlock::iterator Loc= Instr;
|
|
BasicBlock *Next = Curr->splitBasicBlock(Loc, "CF");
|
|
Instr->moveBefore(Curr->getTerminator());
|
|
if (Curr != &F->getEntryBlock()) {
|
|
BranchInst::Create(Curr, Next, Instr, Curr->getTerminator());
|
|
Curr->getTerminator()->eraseFromParent();
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
// Init LLVM, call llvm_shutdown() on exit, parse args, etc.
|
|
llvm::PrettyStackTraceProgram X(argc, argv);
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm codegen stress-tester\n");
|
|
llvm_shutdown_obj Y;
|
|
|
|
std::auto_ptr<Module> M(new Module("/tmp/autogen.bc", getGlobalContext()));
|
|
Function *F = GenEmptyFunction(M.get());
|
|
FillFunction(F);
|
|
IntroduceControlFlow(F);
|
|
|
|
// Figure out what stream we are supposed to write to...
|
|
OwningPtr<tool_output_file> Out;
|
|
// Default to standard output.
|
|
if (OutputFilename.empty())
|
|
OutputFilename = "-";
|
|
|
|
std::string ErrorInfo;
|
|
Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
|
|
raw_fd_ostream::F_Binary));
|
|
if (!ErrorInfo.empty()) {
|
|
errs() << ErrorInfo << '\n';
|
|
return 1;
|
|
}
|
|
|
|
PassManager Passes;
|
|
Passes.add(createVerifierPass());
|
|
Passes.add(createPrintModulePass(&Out->os()));
|
|
Passes.run(*M.get());
|
|
Out->keep();
|
|
|
|
return 0;
|
|
}
|