void AMDGPUAlwaysInline::recursivelyVisitUsers(
  GlobalValue &GV,
  SmallPtrSetImpl<Function *> &FuncsToAlwaysInline) {
  SmallVector<User *, 16> Stack;

  SmallPtrSet<const Value *, 8> Visited;

  for (User *U : GV.users())
    Stack.push_back(U);

  while (!Stack.empty()) {
    User *U = Stack.pop_back_val();
    if (!Visited.insert(U).second)
      continue;

    if (Instruction *I = dyn_cast<Instruction>(U)) {
      Function *F = I->getParent()->getParent();
      if (!AMDGPU::isEntryFunctionCC(F->getCallingConv())) {
        FuncsToAlwaysInline.insert(F);
        Stack.push_back(F);
      }

      // No need to look at further users, but we do need to inline any callers.
      continue;
    }

    for (User *UU : U->users())
      Stack.push_back(UU);
  }
}
예제 #2
0
void GlobalDCEPass::UpdateGVDependencies(GlobalValue &GV) {
  SmallPtrSet<GlobalValue *, 8> Deps;
  for (User *User : GV.users())
    ComputeDependencies(User, Deps);
  Deps.erase(&GV); // Remove self-reference.
  for (GlobalValue *GVU : Deps) {
    GVDependencies.insert(std::make_pair(GVU, &GV));
  }
}