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e0590a0b56fc16eb7f8a3d3a2aba1a856f6103f0
RedBear-OS/local/recipes/dev/libclc/source/llvm/tools/llvm-stress/llvm-stress.cpp
T
vasilito cb424d7448 build: static patch-sanity linter (shift-left the malformed-patch class) 
verify-patch-sanity.py validates every active recipe .patch has internally-
consistent hunk line counts — catching the 'malformed patch at line N' failure
at commit/CI/preflight time instead of hours into a cook. This cycle hit that
class three times (qtwaylandscanner, sddm, xwayland), each only discovered when
cookbook tried to apply the patch.

Running it across the repo found 29 latent malformed patches (validated against
GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22').
They were harmless only because they sit in vendored recipes (baked, not re-
applied) — but would fail on any version-bump re-derivation. --fix recounts the
hunk headers (body untouched) and repaired all 29.

Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test
(test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats
(empty placeholders, bare-@@ git hunks).
2026-08-01 05:13:02 +03:00

763 lines
24 KiB
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//===- llvm-stress.cpp - Generate random LL files to stress-test LLVM -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This program is a utility that generates random .ll files to stress-test
// different components in LLVM.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>
#include <system_error>
#include <vector>
namespace llvm {
static cl::OptionCategory StressCategory("Stress Options");
static cl::opt<unsigned> SeedCL("seed", cl::desc("Seed used for randomness"),
cl::init(0), cl::cat(StressCategory));
static cl::opt<unsigned> SizeCL(
"size",
cl::desc("The estimated size of the generated function (# of instrs)"),
cl::init(100), cl::cat(StressCategory));
static cl::opt<std::string> OutputFilename("o",
cl::desc("Override output filename"),
cl::value_desc("filename"),
cl::cat(StressCategory));
static cl::list<StringRef> AdditionalScalarTypes(
"types", cl::CommaSeparated,
cl::desc("Additional IR scalar types "
"(always includes i1, i8, i16, i32, i64, float and double)"));
static cl::opt<bool> EnableScalableVectors(
"enable-scalable-vectors",
cl::desc("Generate IR involving scalable vector types"),
cl::init(false), cl::cat(StressCategory));
namespace {
/// A utility class to provide a pseudo-random number generator which is
/// the same across all platforms. This is somewhat close to the libc
/// implementation. Note: This is not a cryptographically secure pseudorandom
/// number generator.
class Random {
public:
/// C'tor
Random(unsigned _seed):Seed(_seed) {}
/// Return a random integer, up to a
/// maximum of 2**19 - 1.
uint32_t Rand() {
uint32_t Val = Seed + 0x000b07a1;
Seed = (Val * 0x3c7c0ac1);
// Only lowest 19 bits are random-ish.
return Seed & 0x7ffff;
}
/// Return a random 64 bit integer.
uint64_t Rand64() {
uint64_t Val = Rand() & 0xffff;
Val |= uint64_t(Rand() & 0xffff) << 16;
Val |= uint64_t(Rand() & 0xffff) << 32;
Val |= uint64_t(Rand() & 0xffff) << 48;
return Val;
}
/// Rand operator for STL algorithms.
ptrdiff_t operator()(ptrdiff_t y) {
return Rand64() % y;
}
/// Make this like a C++11 random device
using result_type = uint32_t ;
static constexpr result_type min() { return 0; }
static constexpr result_type max() { return 0x7ffff; }
uint32_t operator()() {
uint32_t Val = Rand();
assert(Val <= max() && "Random value out of range");
return Val;
}
private:
unsigned Seed;
};
/// Generate an empty function with a default argument list.
Function *GenEmptyFunction(Module *M) {
// Define a few arguments
LLVMContext &Context = M->getContext();
Type* ArgsTy[] = {
PointerType::get(Context, 0),
PointerType::get(Context, 0),
PointerType::get(Context, 0),
Type::getInt32Ty(Context),
Type::getInt64Ty(Context),
Type::getInt8Ty(Context)
};
auto *FuncTy = FunctionType::get(Type::getVoidTy(Context), ArgsTy, false);
// Pick a unique name to describe the input parameters
Twine Name = "autogen_SD" + Twine{SeedCL};
auto *Func = Function::Create(FuncTy, GlobalValue::ExternalLinkage, Name, M);
Func->setCallingConv(CallingConv::C);
return Func;
}
/// A base class, implementing utilities needed for
/// modifying and adding new random instructions.
struct Modifier {
/// Used to store the randomly generated values.
using PieceTable = std::vector<Value *>;
public:
/// C'tor
Modifier(BasicBlock *Block, PieceTable *PT, Random *R)
: BB(Block), PT(PT), Ran(R), Context(BB->getContext()) {
ScalarTypes.assign({Type::getInt1Ty(Context), Type::getInt8Ty(Context),
Type::getInt16Ty(Context), Type::getInt32Ty(Context),
Type::getInt64Ty(Context), Type::getFloatTy(Context),
Type::getDoubleTy(Context)});
for (auto &Arg : AdditionalScalarTypes) {
Type *Ty = nullptr;
if (Arg == "half")
Ty = Type::getHalfTy(Context);
else if (Arg == "fp128")
Ty = Type::getFP128Ty(Context);
else if (Arg == "x86_fp80")
Ty = Type::getX86_FP80Ty(Context);
else if (Arg == "ppc_fp128")
Ty = Type::getPPC_FP128Ty(Context);
else if (Arg.starts_with("i")) {
unsigned N = 0;
Arg.drop_front().getAsInteger(10, N);
if (N > 0)
Ty = Type::getIntNTy(Context, N);
}
if (!Ty) {
errs() << "Invalid IR scalar type: '" << Arg << "'!\n";
exit(1);
}
ScalarTypes.push_back(Ty);
}
}
/// virtual D'tor to silence warnings.
virtual ~Modifier() = default;
/// Add a new instruction.
virtual void Act() = 0;
/// Add N new instructions,
virtual void ActN(unsigned n) {
for (unsigned i=0; i<n; ++i)
Act();
}
protected:
/// Return a random integer.
uint32_t getRandom() {
return Ran->Rand();
}
/// Return a random value from the list of known values.
Value *getRandomVal() {
assert(PT->size());
return PT->at(getRandom() % PT->size());
}
Constant *getRandomConstant(Type *Tp) {
if (Tp->isIntegerTy()) {
if (getRandom() & 1)
return ConstantInt::getAllOnesValue(Tp);
return ConstantInt::getNullValue(Tp);
} else if (Tp->isFloatingPointTy()) {
if (getRandom() & 1)
return ConstantFP::getAllOnesValue(Tp);
return ConstantFP::getZero(Tp);
}
return UndefValue::get(Tp);
}
/// Return a random value with a known type.
Value *getRandomValue(Type *Tp) {
unsigned index = getRandom();
for (unsigned i=0; i<PT->size(); ++i) {
Value *V = PT->at((index + i) % PT->size());
if (V->getType() == Tp)
return V;
}
// If the requested type was not found, generate a constant value.
if (Tp->isIntegerTy()) {
if (getRandom() & 1)
return ConstantInt::getAllOnesValue(Tp);
return ConstantInt::getNullValue(Tp);
} else if (Tp->isFloatingPointTy()) {
if (getRandom() & 1)
return ConstantFP::getAllOnesValue(Tp);
return ConstantFP::getZero(Tp);
} else if (auto *VTp = dyn_cast<FixedVectorType>(Tp)) {
std::vector<Constant*> TempValues;
TempValues.reserve(VTp->getNumElements());
for (unsigned i = 0; i < VTp->getNumElements(); ++i)
TempValues.push_back(getRandomConstant(VTp->getScalarType()));
ArrayRef<Constant*> VectorValue(TempValues);
return ConstantVector::get(VectorValue);
}
return UndefValue::get(Tp);
}
/// Return a random value of any pointer type.
Value *getRandomPointerValue() {
unsigned index = getRandom();
for (unsigned i=0; i<PT->size(); ++i) {
Value *V = PT->at((index + i) % PT->size());
if (V->getType()->isPointerTy())
return V;
}
return UndefValue::get(PointerType::get(Context, 0));
}
/// Return a random value of any vector type.
Value *getRandomVectorValue() {
unsigned index = getRandom();
for (unsigned i=0; i<PT->size(); ++i) {
Value *V = PT->at((index + i) % PT->size());
if (V->getType()->isVectorTy())
return V;
}
return UndefValue::get(pickVectorType());
}
/// Pick a random type.
Type *pickType() {
return (getRandom() & 1) ? pickVectorType() : pickScalarType();
}
/// Pick a random vector type.
Type *pickVectorType(VectorType *VTy = nullptr) {
Type *Ty = pickScalarType();
if (VTy)
return VectorType::get(Ty, VTy->getElementCount());
// Select either fixed length or scalable vectors with 50% probability
// (only if scalable vectors are enabled)
bool Scalable = EnableScalableVectors && getRandom() & 1;
// Pick a random vector width in the range 2**0 to 2**4.
// by adding two randoms we are generating a normal-like distribution
// around 2**3.
unsigned width = 1<<((getRandom() % 3) + (getRandom() % 3));
return VectorType::get(Ty, width, Scalable);
}
/// Pick a random scalar type.
Type *pickScalarType() {
return ScalarTypes[getRandom() % ScalarTypes.size()];
}
/// Basic block to populate
BasicBlock *BB;
/// Value table
PieceTable *PT;
/// Random number generator
Random *Ran;
/// Context
LLVMContext &Context;
std::vector<Type *> ScalarTypes;
};
struct LoadModifier: public Modifier {
LoadModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
// Try to use predefined pointers. If non-exist, use undef pointer value;
Value *Ptr = getRandomPointerValue();
Type *Ty = pickType();
Value *V = new LoadInst(Ty, Ptr, "L", BB->getTerminator()->getIterator());
PT->push_back(V);
}
};
struct StoreModifier: public Modifier {
StoreModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
// Try to use predefined pointers. If non-exist, use undef pointer value;
Value *Ptr = getRandomPointerValue();
Type *ValTy = pickType();
// Do not store vectors of i1s because they are unsupported
// by the codegen.
if (ValTy->isVectorTy() && ValTy->getScalarSizeInBits() == 1)
return;
Value *Val = getRandomValue(ValTy);
new StoreInst(Val, Ptr, BB->getTerminator()->getIterator());
}
};
struct BinModifier: public Modifier {
BinModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *Val0 = getRandomVal();
Value *Val1 = getRandomValue(Val0->getType());
// Don't handle pointer types.
if (Val0->getType()->isPointerTy() ||
Val1->getType()->isPointerTy())
return;
// Don't handle i1 types.
if (Val0->getType()->getScalarSizeInBits() == 1)
return;
bool isFloat = Val0->getType()->getScalarType()->isFloatingPointTy();
Instruction* Term = BB->getTerminator();
unsigned R = getRandom() % (isFloat ? 7 : 13);
Instruction::BinaryOps Op;
switch (R) {
default: llvm_unreachable("Invalid BinOp");
case 0:{Op = (isFloat?Instruction::FAdd : Instruction::Add); break; }
case 1:{Op = (isFloat?Instruction::FSub : Instruction::Sub); break; }
case 2:{Op = (isFloat?Instruction::FMul : Instruction::Mul); break; }
case 3:{Op = (isFloat?Instruction::FDiv : Instruction::SDiv); break; }
case 4:{Op = (isFloat?Instruction::FDiv : Instruction::UDiv); break; }
case 5:{Op = (isFloat?Instruction::FRem : Instruction::SRem); break; }
case 6:{Op = (isFloat?Instruction::FRem : Instruction::URem); break; }
case 7: {Op = Instruction::Shl; break; }
case 8: {Op = Instruction::LShr; break; }
case 9: {Op = Instruction::AShr; break; }
case 10:{Op = Instruction::And; break; }
case 11:{Op = Instruction::Or; break; }
case 12:{Op = Instruction::Xor; break; }
}
PT->push_back(
BinaryOperator::Create(Op, Val0, Val1, "B", Term->getIterator()));
}
};
/// Generate constant values.
struct ConstModifier: public Modifier {
ConstModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Type *Ty = pickType();
if (Ty->isVectorTy()) {
switch (getRandom() % 2) {
case 0: if (Ty->isIntOrIntVectorTy())
return PT->push_back(ConstantVector::getAllOnesValue(Ty));
break;
case 1: if (Ty->isIntOrIntVectorTy())
return PT->push_back(ConstantVector::getNullValue(Ty));
}
}
if (Ty->isFloatingPointTy()) {
// Generate 128 random bits, the size of the (currently)
// largest floating-point types.
uint64_t RandomBits[2];
for (unsigned i = 0; i < 2; ++i)
RandomBits[i] = Ran->Rand64();
APInt RandomInt(Ty->getPrimitiveSizeInBits(), ArrayRef(RandomBits));
APFloat RandomFloat(Ty->getFltSemantics(), RandomInt);
if (getRandom() & 1)
return PT->push_back(ConstantFP::getZero(Ty));
return PT->push_back(ConstantFP::get(Ty->getContext(), RandomFloat));
}
if (Ty->isIntegerTy()) {
switch (getRandom() % 7) {
case 0:
return PT->push_back(ConstantInt::get(
Ty, APInt::getAllOnes(Ty->getPrimitiveSizeInBits())));
case 1:
return PT->push_back(
ConstantInt::get(Ty, APInt::getZero(Ty->getPrimitiveSizeInBits())));
case 2:
case 3:
case 4:
case 5:
case 6:
PT->push_back(ConstantInt::get(Ty, getRandom()));
}
}
}
};
struct AllocaModifier: public Modifier {
AllocaModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Type *Tp = pickType();
const DataLayout &DL = BB->getDataLayout();
PT->push_back(new AllocaInst(Tp, DL.getAllocaAddrSpace(), "A",
BB->getFirstNonPHIIt()));
}
};
struct ExtractElementModifier: public Modifier {
ExtractElementModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *Val0 = getRandomVectorValue();
Value *V = ExtractElementInst::Create(
Val0, getRandomValue(Type::getInt32Ty(BB->getContext())), "E",
BB->getTerminator()->getIterator());
return PT->push_back(V);
}
};
struct ShuffModifier: public Modifier {
ShuffModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *Val0 = getRandomVectorValue();
Value *Val1 = getRandomValue(Val0->getType());
// Can't express arbitrary shufflevectors for scalable vectors
if (isa<ScalableVectorType>(Val0->getType()))
return;
unsigned Width = cast<FixedVectorType>(Val0->getType())->getNumElements();
std::vector<Constant*> Idxs;
Type *I32 = Type::getInt32Ty(BB->getContext());
for (unsigned i=0; i<Width; ++i) {
Constant *CI = ConstantInt::get(I32, getRandom() % (Width*2));
// Pick some undef values.
if (!(getRandom() % 5))
CI = UndefValue::get(I32);
Idxs.push_back(CI);
}
Constant *Mask = ConstantVector::get(Idxs);
Value *V = new ShuffleVectorInst(Val0, Val1, Mask, "Shuff",
BB->getTerminator()->getIterator());
PT->push_back(V);
}
};
struct InsertElementModifier: public Modifier {
InsertElementModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *Val0 = getRandomVectorValue();
Value *Val1 = getRandomValue(Val0->getType()->getScalarType());
Value *V = InsertElementInst::Create(
Val0, Val1, getRandomValue(Type::getInt32Ty(BB->getContext())), "I",
BB->getTerminator()->getIterator());
return PT->push_back(V);
}
};
struct CastModifier: public Modifier {
CastModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *V = getRandomVal();
Type *VTy = V->getType();
Type *DestTy = pickScalarType();
// Handle vector casts vectors.
if (VTy->isVectorTy())
DestTy = pickVectorType(cast<VectorType>(VTy));
// no need to cast.
if (VTy == DestTy) return;
// Pointers:
if (VTy->isPointerTy()) {
if (!DestTy->isPointerTy())
DestTy = PointerType::get(Context, 0);
return PT->push_back(
new BitCastInst(V, DestTy, "PC", BB->getTerminator()->getIterator()));
}
unsigned VSize = VTy->getScalarType()->getPrimitiveSizeInBits();
unsigned DestSize = DestTy->getScalarType()->getPrimitiveSizeInBits();
// Generate lots of bitcasts.
if ((getRandom() & 1) && VSize == DestSize) {
return PT->push_back(
new BitCastInst(V, DestTy, "BC", BB->getTerminator()->getIterator()));
}
// Both types are integers:
if (VTy->isIntOrIntVectorTy() && DestTy->isIntOrIntVectorTy()) {
if (VSize > DestSize) {
return PT->push_back(
new TruncInst(V, DestTy, "Tr", BB->getTerminator()->getIterator()));
} else {
assert(VSize < DestSize && "Different int types with the same size?");
if (getRandom() & 1)
return PT->push_back(new ZExtInst(
V, DestTy, "ZE", BB->getTerminator()->getIterator()));
return PT->push_back(
new SExtInst(V, DestTy, "Se", BB->getTerminator()->getIterator()));
}
}
// Fp to int.
if (VTy->isFPOrFPVectorTy() && DestTy->isIntOrIntVectorTy()) {
if (getRandom() & 1)
return PT->push_back(new FPToSIInst(
V, DestTy, "FC", BB->getTerminator()->getIterator()));
return PT->push_back(
new FPToUIInst(V, DestTy, "FC", BB->getTerminator()->getIterator()));
}
// Int to fp.
if (VTy->isIntOrIntVectorTy() && DestTy->isFPOrFPVectorTy()) {
if (getRandom() & 1)
return PT->push_back(new SIToFPInst(
V, DestTy, "FC", BB->getTerminator()->getIterator()));
return PT->push_back(
new UIToFPInst(V, DestTy, "FC", BB->getTerminator()->getIterator()));
}
// Both floats.
if (VTy->isFPOrFPVectorTy() && DestTy->isFPOrFPVectorTy()) {
if (VSize > DestSize) {
return PT->push_back(new FPTruncInst(
V, DestTy, "Tr", BB->getTerminator()->getIterator()));
} else if (VSize < DestSize) {
return PT->push_back(
new FPExtInst(V, DestTy, "ZE", BB->getTerminator()->getIterator()));
}
// If VSize == DestSize, then the two types must be fp128 and ppc_fp128,
// for which there is no defined conversion. So do nothing.
}
}
};
struct SelectModifier: public Modifier {
SelectModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
// 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 (auto *VTy = dyn_cast<VectorType>(Val0->getType()))
if (getRandom() & 1)
CondTy = VectorType::get(CondTy, VTy->getElementCount());
Value *Cond = getRandomValue(CondTy);
Value *V = SelectInst::Create(Cond, Val0, Val1, "Sl",
BB->getTerminator()->getIterator());
return PT->push_back(V);
}
};
struct CmpModifier: public Modifier {
CmpModifier(BasicBlock *BB, PieceTable *PT, Random *R)
: Modifier(BB, PT, R) {}
void Act() override {
Value *Val0 = getRandomVal();
Value *Val1 = getRandomValue(Val0->getType());
if (Val0->getType()->isPointerTy()) return;
bool fp = Val0->getType()->getScalarType()->isFloatingPointTy();
int op;
if (fp) {
op = getRandom() %
(CmpInst::LAST_FCMP_PREDICATE - CmpInst::FIRST_FCMP_PREDICATE) +
CmpInst::FIRST_FCMP_PREDICATE;
} else {
op = getRandom() %
(CmpInst::LAST_ICMP_PREDICATE - CmpInst::FIRST_ICMP_PREDICATE) +
CmpInst::FIRST_ICMP_PREDICATE;
}
Value *V = CmpInst::Create(fp ? Instruction::FCmp : Instruction::ICmp,
(CmpInst::Predicate)op, Val0, Val1, "Cmp",
BB->getTerminator()->getIterator());
return PT->push_back(V);
}
};
} // end anonymous namespace
static void FillFunction(Function *F, Random &R) {
// 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;
// Consider arguments as legal values.
for (auto &arg : F->args())
PT.push_back(&arg);
// List of modifiers which add new random instructions.
std::vector<std::unique_ptr<Modifier>> Modifiers;
Modifiers.emplace_back(new LoadModifier(BB, &PT, &R));
Modifiers.emplace_back(new StoreModifier(BB, &PT, &R));
auto SM = Modifiers.back().get();
Modifiers.emplace_back(new ExtractElementModifier(BB, &PT, &R));
Modifiers.emplace_back(new ShuffModifier(BB, &PT, &R));
Modifiers.emplace_back(new InsertElementModifier(BB, &PT, &R));
Modifiers.emplace_back(new BinModifier(BB, &PT, &R));
Modifiers.emplace_back(new CastModifier(BB, &PT, &R));
Modifiers.emplace_back(new SelectModifier(BB, &PT, &R));
Modifiers.emplace_back(new CmpModifier(BB, &PT, &R));
// Generate the random instructions
AllocaModifier{BB, &PT, &R}.ActN(5); // Throw in a few allocas
ConstModifier{BB, &PT, &R}.ActN(40); // Throw in a few constants
for (unsigned i = 0; i < SizeCL / Modifiers.size(); ++i)
for (auto &Mod : Modifiers)
Mod->Act();
SM->ActN(5); // Throw in a few stores.
}
static void IntroduceControlFlow(Function *F, Random &R) {
std::vector<Instruction*> BoolInst;
for (auto &Instr : F->front()) {
if (Instr.getType() == IntegerType::getInt1Ty(F->getContext()))
BoolInst.push_back(&Instr);
}
llvm::shuffle(BoolInst.begin(), BoolInst.end(), R);
for (auto *Instr : BoolInst) {
BasicBlock *Curr = Instr->getParent();
BasicBlock::iterator Loc = Instr->getIterator();
BasicBlock *Next = Curr->splitBasicBlock(Loc, "CF");
Instr->moveBefore(Curr->getTerminator()->getIterator());
if (Curr != &F->getEntryBlock()) {
BranchInst::Create(Curr, Next, Instr,
Curr->getTerminator()->getIterator());
Curr->getTerminator()->eraseFromParent();
}
}
}
} // end namespace llvm
int main(int argc, char **argv) {
using namespace llvm;
InitLLVM X(argc, argv);
cl::HideUnrelatedOptions({&StressCategory, &getColorCategory()});
cl::ParseCommandLineOptions(argc, argv, "llvm codegen stress-tester\n");
LLVMContext Context;
auto M = std::make_unique<Module>("/tmp/autogen.bc", Context);
Function *F = GenEmptyFunction(M.get());
// Pick an initial seed value
Random R(SeedCL);
// Generate lots of random instructions inside a single basic block.
FillFunction(F, R);
// Break the basic block into many loops.
IntroduceControlFlow(F, R);
// Figure out what stream we are supposed to write to...
std::unique_ptr<ToolOutputFile> Out;
// Default to standard output.
if (OutputFilename.empty())
OutputFilename = "-";
std::error_code EC;
Out.reset(new ToolOutputFile(OutputFilename, EC, sys::fs::OF_None));
if (EC) {
errs() << EC.message() << '\n';
return 1;
}
// Check that the generated module is accepted by the verifier.
if (verifyModule(*M.get(), &Out->os()))
report_fatal_error("Broken module found, compilation aborted!");
// Output textual IR.
M->print(Out->os(), nullptr);
Out->keep();
return 0;
}
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