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Revert "Use std::bitset for SubtargetFeatures"

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This reverts commit r233055.

It still causes buildbot failures (gcc running out of memory on several platforms, and a self-host failure on arm), although less than the previous time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Kuperstein
2015-03-24 12:56:59 +00:00
parent 9990bb34aa
commit 765aab84d6
33 changed files with 308 additions and 348 deletions
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23
lib/MC/SubtargetFeature.cpp
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@ -150,12 +150,12 @@ std::string SubtargetFeatures::getString() const {
/// feature, set it.
///
static
void SetImpliedBits(FeatureBitset &Bits, const SubtargetFeatureKV *FeatureEntry,
void SetImpliedBits(uint64_t &Bits, const SubtargetFeatureKV *FeatureEntry,
ArrayRef<SubtargetFeatureKV> FeatureTable) {
for (auto &FE : FeatureTable) {
if (FeatureEntry->Value == FE.Value) continue;
if ((FeatureEntry->Implies & FE.Value).any()) {
if (FeatureEntry->Implies & FE.Value) {
Bits |= FE.Value;
SetImpliedBits(Bits, &FE, FeatureTable);
}
@ -166,13 +166,12 @@ void SetImpliedBits(FeatureBitset &Bits, const SubtargetFeatureKV *FeatureEntry,
/// feature, clear it.
///
static
void ClearImpliedBits(FeatureBitset &Bits,
const SubtargetFeatureKV *FeatureEntry,
void ClearImpliedBits(uint64_t &Bits, const SubtargetFeatureKV *FeatureEntry,
ArrayRef<SubtargetFeatureKV> FeatureTable) {
for (auto &FE : FeatureTable) {
if (FeatureEntry->Value == FE.Value) continue;
if ((FE.Implies & FeatureEntry->Value).any()) {
if (FE.Implies & FeatureEntry->Value) {
Bits &= ~FE.Value;
ClearImpliedBits(Bits, &FE, FeatureTable);
}
@ -181,8 +180,8 @@ void ClearImpliedBits(FeatureBitset &Bits,
/// ToggleFeature - Toggle a feature and returns the newly updated feature
/// bits.
FeatureBitset
SubtargetFeatures::ToggleFeature(FeatureBitset Bits, StringRef Feature,
uint64_t
SubtargetFeatures::ToggleFeature(uint64_t Bits, StringRef Feature,
ArrayRef<SubtargetFeatureKV> FeatureTable) {
// Find feature in table.
@ -192,6 +191,7 @@ SubtargetFeatures::ToggleFeature(FeatureBitset Bits, StringRef Feature,
if (FeatureEntry) {
if ((Bits & FeatureEntry->Value) == FeatureEntry->Value) {
Bits &= ~FeatureEntry->Value;
// For each feature that implies this, clear it.
ClearImpliedBits(Bits, FeatureEntry, FeatureTable);
} else {
@ -212,13 +212,13 @@ SubtargetFeatures::ToggleFeature(FeatureBitset Bits, StringRef Feature,
/// getFeatureBits - Get feature bits a CPU.
///
FeatureBitset
uint64_t
SubtargetFeatures::getFeatureBits(StringRef CPU,
ArrayRef<SubtargetFeatureKV> CPUTable,
ArrayRef<SubtargetFeatureKV> FeatureTable) {
if (CPUTable.empty() || FeatureTable.empty())
return FeatureBitset();
return 0;
#ifndef NDEBUG
for (size_t i = 1, e = CPUTable.size(); i != e; ++i) {
@ -230,8 +230,7 @@ SubtargetFeatures::getFeatureBits(StringRef CPU,
"CPU features table is not sorted");
}
#endif
// Resulting bits
FeatureBitset Bits;
uint64_t Bits = 0; // Resulting bits
// Check if help is needed
if (CPU == "help")
@ -248,7 +247,7 @@ SubtargetFeatures::getFeatureBits(StringRef CPU,
// Set the feature implied by this CPU feature, if any.
for (auto &FE : FeatureTable) {
if ((CPUEntry->Value & FE.Value).any())
if (CPUEntry->Value & FE.Value)
SetImpliedBits(Bits, &FE, FeatureTable);
}
} else {