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llvm-stress: Stabalize (by using an ordered container) and add randomness to the order in which loops are generated.

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llvm-svn: 158908
This commit is contained in:
Nadav Rotem 2012-06-21 08:58:15 +00:00
parent b856af08dc
commit e1481b910d
1 changed files with 20 additions and 9 deletions
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29
tools/llvm-stress/llvm-stress.cpp
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@ -82,6 +82,12 @@ public:
uint64_t Val = Rand32();
return Val | (uint64_t(Rand32()) << 32);
}
/// Rand operator for STL algorithms.
ptrdiff_t operator()(ptrdiff_t y) {
return Rand64() % y;
}
private:
unsigned Seed;
};
@ -599,15 +605,13 @@ struct CmpModifier: public Modifier {
}
};
void FillFunction(Function *F) {
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;
// 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();
@ -648,15 +652,17 @@ void FillFunction(Function *F) {
SM->ActN(5); // Throw in a few stores.
}
void IntroduceControlFlow(Function *F) {
std::set<Instruction*> BoolInst;
void IntroduceControlFlow(Function *F, Random &R) {
std::vector<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);
BoolInst.push_back(it);
}
for (std::set<Instruction*>::iterator it = BoolInst.begin(),
std::random_shuffle(BoolInst.begin(), BoolInst.end(), R);
for (std::vector<Instruction*>::iterator it = BoolInst.begin(),
e = BoolInst.end(); it != e; ++it) {
Instruction *Instr = *it;
BasicBlock *Curr = Instr->getParent();
@ -678,8 +684,13 @@ int main(int argc, char **argv) {
std::auto_ptr<Module> M(new Module("/tmp/autogen.bc", getGlobalContext()));
Function *F = GenEmptyFunction(M.get());
FillFunction(F);
IntroduceControlFlow(F);
// 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...
OwningPtr<tool_output_file> Out;