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Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsMachineFunction.h')
-rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsMachineFunction.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h b/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h new file mode 100644 index 0000000..0fde55c --- /dev/null +++ b/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h @@ -0,0 +1,111 @@ +//===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- C++ -*-=// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file declares the Mips specific subclass of MachineFunctionInfo. +// +//===----------------------------------------------------------------------===// + +#ifndef MIPS_MACHINE_FUNCTION_INFO_H +#define MIPS_MACHINE_FUNCTION_INFO_H + +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineFrameInfo.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(); + + 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; + + /// 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; + + // Range of frame object indices. + // InArgFIRange: Range of indices of all frame objects created during call to + // LowerFormalArguments. + // OutArgFIRange: Range of indices of all frame objects created during call to + // LowerCall except for the frame object for restoring $gp. + std::pair<int, int> InArgFIRange, OutArgFIRange; + int GPFI; // Index of the frame object for restoring $gp + mutable int DynAllocFI; // Frame index of dynamically allocated stack area. + unsigned MaxCallFrameSize; + + bool EmitNOAT; + +public: + MipsFunctionInfo(MachineFunction& MF) + : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), + VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)), + OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), DynAllocFI(0), + MaxCallFrameSize(0), EmitNOAT(false) + {} + + bool isInArgFI(int FI) const { + return FI <= InArgFIRange.first && FI >= InArgFIRange.second; + } + void setLastInArgFI(int FI) { InArgFIRange.second = FI; } + + bool isOutArgFI(int FI) const { + return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second; + } + void extendOutArgFIRange(int FirstFI, int LastFI) { + if (!OutArgFIRange.second) + // this must be the first time this function was called. + OutArgFIRange.first = FirstFI; + OutArgFIRange.second = LastFI; + } + + int getGPFI() const { return GPFI; } + void setGPFI(int FI) { GPFI = FI; } + bool needGPSaveRestore() const { return getGPFI(); } + bool isGPFI(int FI) const { return GPFI && GPFI == FI; } + + // The first call to this function creates a frame object for dynamically + // allocated stack area. + int getDynAllocFI() const { + if (!DynAllocFI) + DynAllocFI = MF.getFrameInfo()->CreateFixedObject(4, 0, true); + + return DynAllocFI; + } + bool isDynAllocFI(int FI) const { return DynAllocFI && DynAllocFI == FI; } + + unsigned getSRetReturnReg() const { return SRetReturnReg; } + void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } + + bool globalBaseRegFixed() const; + bool globalBaseRegSet() const; + unsigned getGlobalBaseReg(); + + int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } + void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } + + unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; } + void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; } + + bool getEmitNOAT() const { return EmitNOAT; } + void setEmitNOAT() { EmitNOAT = true; } +}; + +} // end of namespace llvm + +#endif // MIPS_MACHINE_FUNCTION_INFO_H |