/// TestFuncs - Extract all blocks for the miscompiled functions except for the
/// specified blocks. If the problem still exists, return true.
///
bool ReduceMiscompiledBlocks::TestFuncs(const std::vector<BasicBlock*> &BBs,
std::string &Error) {
// Test to see if the function is misoptimized if we ONLY run it on the
// functions listed in Funcs.
outs() << "Checking to see if the program is misoptimized when all ";
if (!BBs.empty()) {
outs() << "but these " << BBs.size() << " blocks are extracted: ";
for (unsigned i = 0, e = BBs.size() < 10 ? BBs.size() : 10; i != e; ++i)
outs() << BBs[i]->getName() << " ";
if (BBs.size() > 10) outs() << "...";
} else {
outs() << "blocks are extracted.";
}
outs() << '\n';
// Split the module into the two halves of the program we want.
ValueToValueMapTy VMap;
Module *Clone = CloneModule(BD.getProgram(), VMap);
Module *Orig = BD.swapProgramIn(Clone);
std::vector<Function*> FuncsOnClone;
std::vector<BasicBlock*> BBsOnClone;
for (unsigned i = 0, e = FunctionsBeingTested.size(); i != e; ++i) {
Function *F = cast<Function>(VMap[FunctionsBeingTested[i]]);
FuncsOnClone.push_back(F);
}
for (unsigned i = 0, e = BBs.size(); i != e; ++i) {
BasicBlock *BB = cast<BasicBlock>(VMap[BBs[i]]);
BBsOnClone.push_back(BB);
}
VMap.clear();
Module *ToNotOptimize = CloneModule(BD.getProgram(), VMap);
Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize,
FuncsOnClone,
VMap);
// Try the extraction. If it doesn't work, then the block extractor crashed
// or something, in which case bugpoint can't chase down this possibility.
if (std::unique_ptr<Module> New =
BD.extractMappedBlocksFromModule(BBsOnClone, ToOptimize)) {
delete ToOptimize;
// Run the predicate,
// note that the predicate will delete both input modules.
bool Ret = TestFn(BD, New.get(), ToNotOptimize, Error);
delete BD.swapProgramIn(Orig);
return Ret;
}
delete BD.swapProgramIn(Orig);
delete ToOptimize;
delete ToNotOptimize;
return false;
}
/// TestFuncs - split functions in a Module into two groups: those that are
/// under consideration for miscompilation vs. those that are not, and test
/// accordingly. Each group of functions becomes a separate Module.
///
bool ReduceMiscompilingFunctions::TestFuncs(const std::vector<Function*> &Funcs,
std::string &Error) {
// Test to see if the function is misoptimized if we ONLY run it on the
// functions listed in Funcs.
outs() << "Checking to see if the program is misoptimized when "
<< (Funcs.size()==1 ? "this function is" : "these functions are")
<< " run through the pass"
<< (BD.getPassesToRun().size() == 1 ? "" : "es") << ":";
PrintFunctionList(Funcs);
outs() << '\n';
// Create a clone for two reasons:
// * If the optimization passes delete any function, the deleted function
// will be in the clone and Funcs will still point to valid memory
// * If the optimization passes use interprocedural information to break
// a function, we want to continue with the original function. Otherwise
// we can conclude that a function triggers the bug when in fact one
// needs a larger set of original functions to do so.
ValueToValueMapTy VMap;
Module *Clone = CloneModule(BD.getProgram(), VMap);
Module *Orig = BD.swapProgramIn(Clone);
std::vector<Function*> FuncsOnClone;
for (unsigned i = 0, e = Funcs.size(); i != e; ++i) {
Function *F = cast<Function>(VMap[Funcs[i]]);
FuncsOnClone.push_back(F);
}
// Split the module into the two halves of the program we want.
VMap.clear();
Module *ToNotOptimize = CloneModule(BD.getProgram(), VMap);
Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize, FuncsOnClone,
VMap);
// Run the predicate, note that the predicate will delete both input modules.
bool Broken = TestFn(BD, ToOptimize, ToNotOptimize, Error);
delete BD.swapProgramIn(Orig);
return Broken;
}