vendor/llvm/llvm-r135360

1 files changed, 79 insertions, 0 deletions

diff --git a/include/llvm/MC/MCSubtargetInfo.h b/include/llvm/MC/MCSubtargetInfo.h
new file mode 100644
index 000000000000..3b53f205cd55
--- /dev/null
+++ b/include/llvm/MC/MCSubtargetInfo.h
@@ -0,0 +1,79 @@
+//==-- llvm/MC/MCSubtargetInfo.h - Subtarget Information ---------*- C++ -*-==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file describes the subtarget options of a Target machine.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCSUBTARGET_H
+#define LLVM_MC_MCSUBTARGET_H
+
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/MC/MCInstrItineraries.h"
+#include <string>
+
+namespace llvm {
+
+class StringRef;
+
+//===----------------------------------------------------------------------===//
+///
+/// MCSubtargetInfo - Generic base class for all target subtargets.
+///
+class MCSubtargetInfo {
+  std::string TargetTriple;            // Target triple
+  const SubtargetFeatureKV *ProcFeatures;  // Processor feature list
+  const SubtargetFeatureKV *ProcDesc;  // Processor descriptions
+  const SubtargetInfoKV *ProcItins;    // Scheduling itineraries
+  const InstrStage *Stages;            // Instruction stages
+  const unsigned *OperandCycles;       // Operand cycles
+  const unsigned *ForwardingPathes;    // Forwarding pathes
+  unsigned NumFeatures;                // Number of processor features
+  unsigned NumProcs;                   // Number of processors
+  uint64_t FeatureBits;                // Feature bits for current CPU + FS
+
+public:
+  void 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);
+
+  /// getTargetTriple - Return the target triple string.
+  StringRef getTargetTriple() const {
+    return TargetTriple;
+  }
+
+  /// getFeatureBits - Return the feature bits.
+  ///
+  uint64_t getFeatureBits() const {
+    return FeatureBits;
+  }
+
+  /// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
+  /// feature string), recompute and return feature bits.
+  uint64_t ReInitMCSubtargetInfo(StringRef CPU, StringRef FS);
+
+  /// ToggleFeature - Toggle a feature and returns the re-computed feature
+  /// bits. This version does not change the implied bits.
+  uint64_t ToggleFeature(uint64_t FB);
+
+  /// ToggleFeature - Toggle a feature and returns the re-computed feature
+  /// bits. This version will also change all implied bits.
+  uint64_t ToggleFeature(StringRef FS);
+
+  /// getInstrItineraryForCPU - Get scheduling itinerary of a CPU.
+  ///
+  InstrItineraryData getInstrItineraryForCPU(StringRef CPU) const;
+};
+
+} // End llvm namespace
+
+#endif