diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsMachineFunction.h')
| -rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsMachineFunction.h | 123 |
1 files changed, 39 insertions, 84 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h b/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h index 1e8e4fe..df40e6c 100644 --- a/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h +++ b/contrib/llvm/lib/Target/Mips/MipsMachineFunction.h @@ -14,6 +14,7 @@ #ifndef MIPS_MACHINE_FUNCTION_INFO_H #define MIPS_MACHINE_FUNCTION_INFO_H +#include <utility> #include "llvm/ADT/SmallVector.h" #include "llvm/ADT/VectorExtras.h" #include "llvm/CodeGen/MachineFunction.h" @@ -26,50 +27,6 @@ namespace llvm { class MipsFunctionInfo : public MachineFunctionInfo { private: - /// Holds for each function where on the stack the Frame Pointer must be - /// saved. This is used on Prologue and Epilogue to emit FP save/restore - int FPStackOffset; - - /// Holds for each function where on the stack the Return Address must be - /// saved. This is used on Prologue and Epilogue to emit RA save/restore - int RAStackOffset; - - /// At each function entry, two special bitmask directives must be emitted - /// to help debugging, for CPU and FPU callee saved registers. Both need - /// the negative offset from the final stack size and its higher registers - /// location on the stack. - int CPUTopSavedRegOff; - int FPUTopSavedRegOff; - - /// 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 LowerFormalArguments 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 - // LowerFormalArguments, the Stack Pointer Offset calculation must be - // postponed to emitPrologue. - SmallVector<MipsFIHolder, 4> FnStoreVarArgs; - bool HasStoreVarArgs; - /// 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. @@ -83,55 +40,47 @@ private: /// 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 + unsigned MaxCallFrameSize; + + /// AtomicFrameIndex - To implement atomic.swap and atomic.cmp.swap + /// intrinsics, it is necessary to use a temporary stack location. + /// This field holds the frame index of this location. + int AtomicFrameIndex; public: MipsFunctionInfo(MachineFunction& MF) - : FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0), - FPUTopSavedRegOff(0), GPHolder(-1,-1), HasLoadArgs(false), - HasStoreVarArgs(false), SRetReturnReg(0), GlobalBaseReg(0), - VarArgsFrameIndex(0) + : SRetReturnReg(0), GlobalBaseReg(0), + VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)), + OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), MaxCallFrameSize(0), + AtomicFrameIndex(-1) {} - int getFPStackOffset() const { return FPStackOffset; } - void setFPStackOffset(int Off) { FPStackOffset = Off; } - - int getRAStackOffset() const { return RAStackOffset; } - void setRAStackOffset(int Off) { RAStackOffset = Off; } - - int getCPUTopSavedRegOff() const { return CPUTopSavedRegOff; } - void setCPUTopSavedRegOff(int Off) { CPUTopSavedRegOff = Off; } - - int getFPUTopSavedRegOff() const { return FPUTopSavedRegOff; } - void setFPUTopSavedRegOff(int Off) { FPUTopSavedRegOff = Off; } - - 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; } - bool needGPSaveRestore() const { return GPHolder.SPOffset != -1; } - - bool hasLoadArgs() const { return HasLoadArgs; } - bool hasStoreVarArgs() const { return HasStoreVarArgs; } - - 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 isInArgFI(int FI) const { + return FI <= InArgFIRange.first && FI >= InArgFIRange.second; } + void setLastInArgFI(int FI) { InArgFIRange.second = FI; } - 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 ); + bool isOutArgFI(int FI) const { + return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second; } - 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 ); + 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; } + unsigned getSRetReturnReg() const { return SRetReturnReg; } void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } @@ -140,6 +89,12 @@ public: int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } + + unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; } + void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; } + + int getAtomicFrameIndex() const { return AtomicFrameIndex; } + void setAtomicFrameIndex(int Index) { AtomicFrameIndex = Index; } }; } // end of namespace llvm |
