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//===-- OptNone.cpp -------------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Passes.h"
#include "klee/Config/Version.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Module.h"
namespace klee {
char OptNonePass::ID;
bool OptNonePass::runOnModule(llvm::Module &M) {
// Find list of functions that start with `klee_`
// and mark all functions that contain such call or invoke as optnone
llvm::SmallPtrSet<llvm::Function *,16> CallingFunctions;
for (auto &F : M) {
if (!F.hasName() || !F.getName().startswith("klee_"))
continue;
#if LLVM_VERSION_CODE >= LLVM_VERSION(3, 5)
for (auto *U : F.users()) {
// skip non-calls and non-invokes
if (!llvm::isa<llvm::CallInst>(U) && !llvm::isa<llvm::InvokeInst>(U))
continue;
auto *Inst = llvm::cast<llvm::Instruction>(U);
CallingFunctions.insert(Inst->getParent()->getParent());
}
#else
for (auto i = F.use_begin(), e = F.use_end(); i != e; ++i) {
if (auto Inst = llvm::dyn_cast<llvm::Instruction>(*i)) {
CallingFunctions.insert(Inst->getParent()->getParent());
}
}
#endif
}
bool changed = false;
for (auto F : CallingFunctions) {
// Skip if already annotated
if (F->hasFnAttribute(llvm::Attribute::OptimizeNone))
continue;
F->addFnAttr(llvm::Attribute::OptimizeNone);
F->addFnAttr(llvm::Attribute::NoInline);
changed = true;
}
return changed;
}
} // namespace klee
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