/// hasFlag - Determine if a feature has a flag; '+' or '-'
///
-static inline bool hasFlag(const StringRef Feature) {
+static inline bool hasFlag(StringRef Feature) {
assert(!Feature.empty() && "Empty string");
// Get first character
char Ch = Feature[0];
/// StripFlag - Return string stripped of flag.
///
-static inline std::string StripFlag(const StringRef Feature) {
+static inline std::string StripFlag(StringRef Feature) {
return hasFlag(Feature) ? Feature.substr(1) : Feature;
}
/// isEnabled - Return true if enable flag; '+'.
///
-static inline bool isEnabled(const StringRef Feature) {
+static inline bool isEnabled(StringRef Feature) {
assert(!Feature.empty() && "Empty string");
// Get first character
char Ch = Feature[0];
/// Split - Splits a string of comma separated items in to a vector of strings.
///
-static void Split(std::vector<std::string> &V, const StringRef S) {
+static void Split(std::vector<std::string> &V, StringRef S) {
SmallVector<StringRef, 3> Tmp;
S.split(Tmp, ",", -1, false /* KeepEmpty */);
V.assign(Tmp.begin(), Tmp.end());
}
/// Adding features.
-void SubtargetFeatures::AddFeature(const StringRef String) {
- // Don't add empty features or features we already have.
+void SubtargetFeatures::AddFeature(StringRef String, bool Enable) {
+ // Don't add empty features.
if (!String.empty())
// Convert to lowercase, prepend flag if we don't already have a flag.
- Features.push_back(hasFlag(String) ? String.str() : "+" + String.lower());
+ Features.push_back(hasFlag(String) ? String.lower()
+ : (Enable ? "+" : "-") + String.lower());
}
/// Find KV in array using binary search.
// SubtargetFeatures Implementation
//===----------------------------------------------------------------------===//
-SubtargetFeatures::SubtargetFeatures(const StringRef Initial) {
+SubtargetFeatures::SubtargetFeatures(StringRef Initial) {
// Break up string into separate features
Split(Features, Initial);
}
/// ToggleFeature - Toggle a feature and returns the newly updated feature
/// bits.
uint64_t
-SubtargetFeatures::ToggleFeature(uint64_t Bits, const StringRef Feature,
+SubtargetFeatures::ToggleFeature(uint64_t Bits, StringRef Feature,
ArrayRef<SubtargetFeatureKV> FeatureTable) {
// Find feature in table.
/// getFeatureBits - Get feature bits a CPU.
///
uint64_t
-SubtargetFeatures::getFeatureBits(const StringRef CPU,
+SubtargetFeatures::getFeatureBits(StringRef CPU,
ArrayRef<SubtargetFeatureKV> CPUTable,
ArrayRef<SubtargetFeatureKV> FeatureTable) {