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thirdparty/clang/include/llvm/MC/MCInstrAnalysis.h

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+//===-- llvm/MC/MCInstrAnalysis.h - InstrDesc target hooks ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the MCInstrAnalysis class which the MCTargetDescs can
+// derive from to give additional information to MC.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrDesc.h"
+#include "llvm/MC/MCInstrInfo.h"
+
+namespace llvm {
+
+class MCInstrAnalysis {
+protected:
+  friend class Target;
+  const MCInstrInfo *Info;
+
+public:
+  MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
+
+  virtual ~MCInstrAnalysis() {}
+
+  virtual bool isBranch(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isBranch();
+  }
+
+  virtual bool isConditionalBranch(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isConditionalBranch();
+  }
+
+  virtual bool isUnconditionalBranch(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isUnconditionalBranch();
+  }
+
+  virtual bool isIndirectBranch(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isIndirectBranch();
+  }
+
+  virtual bool isCall(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isCall();
+  }
+
+  virtual bool isReturn(const MCInst &Inst) const {
+    return Info->get(Inst.getOpcode()).isReturn();
+  }
+
+  /// evaluateBranch - Given a branch instruction try to get the address the
+  /// branch targets. Otherwise return -1.
+  virtual uint64_t
+  evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size) const;
+};
+
+}