mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-28 15:33:14 +00:00
f864a32c13
This will become necessary in a subsequent change to make this method merge adjacent stack adjustments, i.e. it might erase the previous and/or next instruction. It also greatly simplifies the calls to this function from Prolog- EpilogInserter. Previously, that had a bunch of logic to resume iteration after the call; now it just continues with the returned iterator. Note that this changes the behaviour of PEI a little. Previously, it attempted to re-visit the new instruction created by eliminateCallFramePseudoInstr(). That code was added in r36625, but I can't see any reason for it: the new instructions will obviously not be pseudo instructions, they will not have FrameIndex operands, and we have already accounted for the stack adjustment. Differential Revision: http://reviews.llvm.org/D18627 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265036 91177308-0d34-0410-b5e6-96231b3b80d8
86 lines
3.4 KiB
C++
86 lines
3.4 KiB
C++
//==-- ARMTargetFrameLowering.h - Define frame lowering for ARM --*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
//
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
|
|
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
class ARMSubtarget;
|
|
|
|
class ARMFrameLowering : public TargetFrameLowering {
|
|
protected:
|
|
const ARMSubtarget &STI;
|
|
|
|
public:
|
|
explicit ARMFrameLowering(const ARMSubtarget &sti);
|
|
|
|
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
|
|
/// the function.
|
|
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
|
|
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
|
|
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
|
|
bool noFramePointerElim(const MachineFunction &MF) const override;
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override;
|
|
bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
|
|
int getFrameIndexReference(const MachineFunction &MF, int FI,
|
|
unsigned &FrameReg) const override;
|
|
int ResolveFrameIndexReference(const MachineFunction &MF, int FI,
|
|
unsigned &FrameReg, int SPAdj) const;
|
|
|
|
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
|
|
RegScavenger *RS) const override;
|
|
|
|
void adjustForSegmentedStacks(MachineFunction &MF,
|
|
MachineBasicBlock &MBB) const override;
|
|
|
|
/// Returns true if the target will correctly handle shrink wrapping.
|
|
bool enableShrinkWrapping(const MachineFunction &MF) const override {
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc,
|
|
unsigned StrOpc, bool NoGap,
|
|
bool(*Func)(unsigned, bool), unsigned NumAlignedDPRCS2Regs,
|
|
unsigned MIFlags = 0) const;
|
|
void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
|
|
const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc,
|
|
unsigned LdrOpc, bool isVarArg, bool NoGap,
|
|
bool(*Func)(unsigned, bool),
|
|
unsigned NumAlignedDPRCS2Regs) const;
|
|
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI) const override;
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|