1 files changed, 52 insertions, 8 deletions

diff --git a/lib/MC/MCSubtargetInfo.cpp b/lib/MC/MCSubtargetInfo.cpp
index 1874bf0..86dc108 100644
--- a/lib/MC/MCSubtargetInfo.cpp
+++ b/lib/MC/MCSubtargetInfo.cpp
@@ -11,11 +11,63 @@
 #include "llvm/MC/MCInstrItineraries.h"
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 
 using namespace llvm;
 
+void
+MCSubtargetInfo::InitMCSubtargetInfo(StringRef TT, StringRef CPU, StringRef FS,
+                                     const SubtargetFeatureKV *PF,
+                                     const SubtargetFeatureKV *PD,
+                                     const SubtargetInfoKV *PI,
+                                     const InstrStage *IS,
+                                     const unsigned *OC,
+                                     const unsigned *FP,
+                                     unsigned NF, unsigned NP) {
+  TargetTriple = TT;
+  ProcFeatures = PF;
+  ProcDesc = PD;
+  ProcItins = PI;
+  Stages = IS;
+  OperandCycles = OC;
+  ForwardingPathes = FP;
+  NumFeatures = NF;
+  NumProcs = NP;
+
+  SubtargetFeatures Features(FS);
+  FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
+                                        ProcFeatures, NumFeatures);
+}
+
+
+/// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
+/// feature string) and recompute feature bits.
+uint64_t MCSubtargetInfo::ReInitMCSubtargetInfo(StringRef CPU, StringRef FS) {
+  SubtargetFeatures Features(FS);
+  FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
+                                        ProcFeatures, NumFeatures);
+  return FeatureBits;
+}
+
+/// ToggleFeature - Toggle a feature and returns the re-computed feature
+/// bits. This version does not change the implied bits.
+uint64_t MCSubtargetInfo::ToggleFeature(uint64_t FB) {
+  FeatureBits ^= FB;
+  return FeatureBits;
+}
+
+/// ToggleFeature - Toggle a feature and returns the re-computed feature
+/// bits. This version will also change all implied bits.
+uint64_t MCSubtargetInfo::ToggleFeature(StringRef FS) {
+  SubtargetFeatures Features;
+  FeatureBits = Features.ToggleFeature(FeatureBits, FS,
+                                       ProcFeatures, NumFeatures);
+  return FeatureBits;
+}
+
+
 InstrItineraryData
 MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
   assert(ProcItins && "Instruction itineraries information not available!");
@@ -42,11 +94,3 @@ MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
   return InstrItineraryData(Stages, OperandCycles, ForwardingPathes,
                             (InstrItinerary *)Found->Value);
 }
-
-/// getFeatureBits - Get the feature bits for a CPU (optionally supplemented
-/// with feature string).
-uint64_t MCSubtargetInfo::getFeatureBits(StringRef CPU, StringRef FS) const {
-  SubtargetFeatures Features(FS);
-  return Features.getFeatureBits(CPU, ProcDesc, NumProcs,
-                                 ProcFeatures, NumFeatures);
-}