static void EraseUnwantedCUDAMatchesImpl(Sema &S, const FunctionDecl *Caller,
llvm::SmallVectorImpl<T> &Matches,
FetchDeclFn FetchDecl) {
assert(S.getLangOpts().CUDATargetOverloads &&
"Should not be called w/o enabled target overloads.");
if (Matches.size() <= 1)
return;
// Find the best call preference among the functions in Matches.
Sema::CUDAFunctionPreference P, BestCFP = Sema::CFP_Never;
for (auto const &Match : Matches) {
P = S.IdentifyCUDAPreference(Caller, FetchDecl(Match));
if (P > BestCFP)
BestCFP = P;
}
// Erase all functions with lower priority.
for (unsigned I = 0, N = Matches.size(); I != N;)
if (S.IdentifyCUDAPreference(Caller, FetchDecl(Matches[I])) < BestCFP) {
Matches[I] = Matches[--N];
Matches.resize(N);
} else {
++I;
}
}
