mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
important. - Cleanup in the Subtarget info with addition of new features, not all support yet, but they allow the future inclusion of features easier. Among new features, we have : Arch family info (mips1, mips2, ...), ABI info (o32, eabi), 64-bit integer and float registers, allegrex vector FPU (VFPU), single float only support. - TargetMachine now detects allegrex core. - Added allegrex (Mips32r2) sext_inreg instructions. - *Added Float Point Instructions*, handling single float only, and aliased accesses for 32-bit FPUs. - Some cleanup in FP instruction formats and FP register classes. - Calling conventions improved to support mips 32-bit EABI. - Added Asm Printer support for fp cond codes. - Added support for sret copy to a return register. - EABI support added into LowerCALL and FORMAL_ARGS. - MipsFunctionInfo now keeps a virtual register per function to track the sret on function entry until function ret. - MipsInstrInfo FP support into methods (isMoveInstr, isLoadFromStackSlot, ...), FP cond codes mapping and initial FP Branch Analysis. - Two new Mips SDNode to handle fp branch and compare instructions : FPBrcond, FPCmp - MipsTargetLowering : handling different FP classes, Allegrex support, sret return copy, no homing location within EABI, non 32-bit stack objects arguments, and asm constraint for float. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53146 91177308-0d34-0410-b5e6-96231b3b80d8
122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
//===-- 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/ADT/VectorExtras.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// MipsFunctionInfo - This class is derived from MachineFunction private
|
|
/// Mips target-specific information for each MachineFunction.
|
|
class MipsFunctionInfo : public MachineFunctionInfo {
|
|
|
|
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;
|
|
|
|
/// 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), SRetReturnReg(0)
|
|
{}
|
|
|
|
int getFPStackOffset() const { return FPStackOffset; }
|
|
void setFPStackOffset(int Off) { FPStackOffset = Off; }
|
|
|
|
int getRAStackOffset() const { return RAStackOffset; }
|
|
void setRAStackOffset(int Off) { RAStackOffset = 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; }
|
|
|
|
int getTopSavedRegOffset() const {
|
|
return (RAStackOffset > FPStackOffset) ?
|
|
(RAStackOffset) : (FPStackOffset);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
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 );
|
|
}
|
|
|
|
unsigned getSRetReturnReg() const { return SRetReturnReg; }
|
|
void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
|
|
};
|
|
|
|
} // end of namespace llvm
|
|
|
|
#endif // MIPS_MACHINE_FUNCTION_INFO_H
|