[mips] Forbid the use of registers t6, t7 and t8 if the target is NaCl.

[oota-llvm.git] / lib / Target / Mips / MipsMachineFunction.h

diff --git a/lib/Target/Mips/MipsMachineFunction.h b/lib/Target/Mips/MipsMachineFunction.h
index b05f6187d230e7b6c569af133b1a41c3cb5a3bfe..43bf6827eefb3a8f6b7246e9d3c1577d0415257d 100644 (file)
--- a/lib/Target/Mips/MipsMachineFunction.h
+++ b/lib/Target/Mips/MipsMachineFunction.h
@@ -15,17 +15,84 @@
 #define MIPS_MACHINE_FUNCTION_INFO_H
 
 #include "MipsSubtarget.h"
-#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/ValueMap.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/IR/GlobalValue.h"
 #include "llvm/Target/TargetFrameLowering.h"
 #include "llvm/Target/TargetMachine.h"
 #include <utility>
 
 namespace llvm {
 
+/// \brief A class derived from PseudoSourceValue that represents a GOT entry
+/// resolved by lazy-binding.
+class MipsCallEntry : public PseudoSourceValue {
+public:
+  explicit MipsCallEntry(const StringRef &N);
+  explicit MipsCallEntry(const GlobalValue *V);
+  virtual bool isConstant(const MachineFrameInfo *) const;
+  virtual bool isAliased(const MachineFrameInfo *) const;
+  virtual bool mayAlias(const MachineFrameInfo *) const;
+
+private:
+  virtual void printCustom(raw_ostream &O) const;
+#ifndef NDEBUG
+  std::string Name;
+  const GlobalValue *Val;
+#endif
+};
+
 /// MipsFunctionInfo - This class is derived from MachineFunction private
 /// Mips target-specific information for each MachineFunction.
 class MipsFunctionInfo : public MachineFunctionInfo {
+public:
+  MipsFunctionInfo(MachineFunction& MF)
+   : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), Mips16SPAliasReg(0),
+     VarArgsFrameIndex(0), CallsEhReturn(false)
+  {}
+
+  ~MipsFunctionInfo();
+
+  unsigned getSRetReturnReg() const { return SRetReturnReg; }
+  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
+
+  bool globalBaseRegSet() const;
+  unsigned getGlobalBaseReg();
+
+  bool mips16SPAliasRegSet() const;
+  unsigned getMips16SPAliasReg();
+
+  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
+  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
+
+  bool hasByvalArg() const { return HasByvalArg; }
+  void setFormalArgInfo(unsigned Size, bool HasByval) {
+    IncomingArgSize = Size;
+    HasByvalArg = HasByval;
+  }
+
+  unsigned getIncomingArgSize() const { return IncomingArgSize; }
+
+  bool callsEhReturn() const { return CallsEhReturn; }
+  void setCallsEhReturn() { CallsEhReturn = true; }
+
+  void createEhDataRegsFI();
+  int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
+  bool isEhDataRegFI(int FI) const;
+
+  /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
+  /// representing a GOT entry for an external function.
+  MachinePointerInfo callPtrInfo(const StringRef &Name);
+
+  /// \brief Create a MachinePointerInfo that has a MipsCallEntr object
+  /// representing a GOT entry for a global function.
+  MachinePointerInfo callPtrInfo(const GlobalValue *Val);
+
+private:
   virtual void anchor();
 
   MachineFunction& MF;
@@ -39,28 +106,29 @@ class MipsFunctionInfo : public MachineFunctionInfo {
   /// relocation models.
   unsigned GlobalBaseReg;
 
+  /// Mips16SPAliasReg - keeps track of the virtual register initialized for
+  /// use as an alias for SP for use in load/store of halfword/byte from/to
+  /// the stack
+  unsigned Mips16SPAliasReg;
+
   /// VarArgsFrameIndex - FrameIndex for start of varargs area.
   int VarArgsFrameIndex;
 
-  bool EmitNOAT;
+  /// True if function has a byval argument.
+  bool HasByvalArg;
 
-public:
-  MipsFunctionInfo(MachineFunction& MF)
-  : MF(MF), SRetReturnReg(0), GlobalBaseReg(0),
-    VarArgsFrameIndex(0), EmitNOAT(false)
-  {}
+  /// Size of incoming argument area.
+  unsigned IncomingArgSize;
 
-  unsigned getSRetReturnReg() const { return SRetReturnReg; }
-  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
+  /// CallsEhReturn - Whether the function calls llvm.eh.return.
+  bool CallsEhReturn;
 
-  bool globalBaseRegSet() const;
-  unsigned getGlobalBaseReg();
-
-  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
-  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
+  /// Frame objects for spilling eh data registers.
+  int EhDataRegFI[4];
 
-  bool getEmitNOAT() const { return EmitNOAT; }
-  void setEmitNOAT() { EmitNOAT = true; }
+  /// MipsCallEntry maps.
+  StringMap<const MipsCallEntry *> ExternalCallEntries;
+  ValueMap<const GlobalValue *, const MipsCallEntry *> GlobalCallEntries;
 };
 
 } // end of namespace llvm