[mips] Delete MipsFunctionInfo::MaxCallFrameSize which is no longer used.

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

diff --git a/lib/Target/Mips/MipsMachineFunction.h b/lib/Target/Mips/MipsMachineFunction.h
index e0ecdd91b94d54e9f67f86f77dd8adef3bba12cc..5b766f22a80d383f9ccba42517aaf704987c34aa 100644 (file)
--- a/lib/Target/Mips/MipsMachineFunction.h
+++ b/lib/Target/Mips/MipsMachineFunction.h
@@ -14,101 +14,63 @@
 #ifndef MIPS_MACHINE_FUNCTION_INFO_H
 #define MIPS_MACHINE_FUNCTION_INFO_H
 
-#include "llvm/ADT/VectorExtras.h"
+#include "MipsSubtarget.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetMachine.h"
+#include <utility>
 
 namespace llvm {
 
 /// MipsFunctionInfo - This class is derived from MachineFunction private
 /// Mips target-specific information for each MachineFunction.
 class MipsFunctionInfo : public MachineFunctionInfo {
+  virtual void anchor();
 
-private:
-  /// Holds for each function where on the stack 
-  /// the Frame Pointer must be saved
-  int FPStackOffset;
-
-  /// Holds for each function where on the stack 
-  /// the Return Address must be saved
-  int RAStackOffset;
-
-  /// MipsFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
-  struct MipsFIHolder {
-
-    int FI;
-    int SPOffset;
-
-    MipsFIHolder(int FrameIndex, int StackPointerOffset)
-      : FI(FrameIndex), SPOffset(StackPointerOffset) {}
-  };
-
-  /// When PIC is used the GP must be saved on the stack
-  /// on the function prologue and must be reloaded from this
-  /// stack location after every call. A reference to its stack
-  /// location and frame index must be kept to be used on
-  /// emitPrologue and processFunctionBeforeFrameFinalized.
-  MipsFIHolder GPHolder;
-
-  // On LowerFORMAL_ARGUMENTS the stack size is unknown,
-  // so the Stack Pointer Offset calculation of "not in 
-  // register arguments" must be postponed to emitPrologue. 
-  SmallVector<MipsFIHolder, 16> FnLoadArgs;
-  bool HasLoadArgs;
-
-  // When VarArgs, we must write registers back to caller
-  // stack, preserving on register arguments. Since the 
-  // stack size is unknown on LowerFORMAL_ARGUMENTS,
-  // the Stack Pointer Offset calculation must be
-  // postponed to emitPrologue. 
-  SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
-  bool HasStoreVarArgs;
+  MachineFunction& MF;
+  /// SRetReturnReg - Some subtargets require that sret lowering includes
+  /// returning the value of the returned struct in a register. This field
+  /// holds the virtual register into which the sret argument is passed.
+  unsigned SRetReturnReg;
 
-public:
-  MipsFunctionInfo(MachineFunction& MF) 
-  : FPStackOffset(0), RAStackOffset(0), GPHolder(-1,-1),
-    HasLoadArgs(false), HasStoreVarArgs(false)
-  {}
+  /// GlobalBaseReg - keeps track of the virtual register initialized for
+  /// use as the global base register. This is used for PIC in some PIC
+  /// relocation models.
+  unsigned GlobalBaseReg;
+
+  /// VarArgsFrameIndex - FrameIndex for start of varargs area.
+  int VarArgsFrameIndex;
 
-  int getFPStackOffset() const { return FPStackOffset; }
-  void setFPStackOffset(int Off) { FPStackOffset = Off; }
+  // Range of frame object indices.
+  // InArgFIRange: Range of indices of all frame objects created during call to
+  //               LowerFormalArguments.
+  std::pair<int, int> InArgFIRange;
 
-  int getRAStackOffset() const { return RAStackOffset; }
-  void setRAStackOffset(int Off) { RAStackOffset = Off; }
+  bool EmitNOAT;
 
-  int getGPStackOffset() const { return GPHolder.SPOffset; }
-  int getGPFI() const { return GPHolder.FI; }
-  void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; }
-  void setGPFI(int FI) { GPHolder.FI = FI; }
+public:
+  MipsFunctionInfo(MachineFunction& MF)
+  : MF(MF), SRetReturnReg(0), GlobalBaseReg(0),
+    VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)), EmitNOAT(false)
+  {}
 
-  int getTopSavedRegOffset() const { 
-    return (RAStackOffset > FPStackOffset) ? 
-           (RAStackOffset) : (FPStackOffset);
+  bool isInArgFI(int FI) const {
+    return FI <= InArgFIRange.first && FI >= InArgFIRange.second;
   }
+  void setLastInArgFI(int FI) { InArgFIRange.second = FI; }
 
-  bool hasLoadArgs() const { return HasLoadArgs; }
-  bool hasStoreVarArgs() const { return HasStoreVarArgs; } 
+  unsigned getSRetReturnReg() const { return SRetReturnReg; }
+  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
 
-  void recordLoadArgsFI(int FI, int SPOffset) {
-    if (!HasLoadArgs) HasLoadArgs=true;
-    FnLoadArgs.push_back(MipsFIHolder(FI, SPOffset));
-  }
-  void recordStoreVarArgsFI(int FI, int SPOffset) {
-    if (!HasStoreVarArgs) HasStoreVarArgs=true;
-    FnStoreVarArgs.push_back(MipsFIHolder(FI, SPOffset));
-  }
+  bool globalBaseRegSet() const;
+  unsigned getGlobalBaseReg();
 
-  void adjustLoadArgsFI(MachineFrameInfo *MFI) const {
-    if (!hasLoadArgs()) return;
-    for (unsigned i = 0, e = FnLoadArgs.size(); i != e; ++i) 
-      MFI->setObjectOffset( FnLoadArgs[i].FI, FnLoadArgs[i].SPOffset );
-  }
-  void adjustStoreVarArgsFI(MachineFrameInfo *MFI) const {
-    if (!hasStoreVarArgs()) return; 
-    for (unsigned i = 0, e = FnStoreVarArgs.size(); i != e; ++i) 
-      MFI->setObjectOffset( FnStoreVarArgs[i].FI, FnStoreVarArgs[i].SPOffset );
-  }
+  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
+  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
 
+  bool getEmitNOAT() const { return EmitNOAT; }
+  void setEmitNOAT() { EmitNOAT = true; }
 };
 
 } // end of namespace llvm