mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 03:23:01 +02:00
07d10a6e30
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 llvm-svn: 265036
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
//===-- SparcFrameLowering.h - Define frame lowering for Sparc --*- 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_SPARC_SPARCFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
|
|
|
|
#include "Sparc.h"
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
|
|
class SparcSubtarget;
|
|
class SparcFrameLowering : public TargetFrameLowering {
|
|
public:
|
|
explicit SparcFrameLowering(const SparcSubtarget &ST);
|
|
|
|
/// 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;
|
|
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) const override;
|
|
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override;
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
|
|
RegScavenger *RS = nullptr) const override;
|
|
|
|
int getFrameIndexReference(const MachineFunction &MF, int FI,
|
|
unsigned &FrameReg) const override;
|
|
|
|
/// targetHandlesStackFrameRounding - Returns true if the target is
|
|
/// responsible for rounding up the stack frame (probably at emitPrologue
|
|
/// time).
|
|
bool targetHandlesStackFrameRounding() const override { return true; }
|
|
|
|
private:
|
|
// Remap input registers to output registers for leaf procedure.
|
|
void remapRegsForLeafProc(MachineFunction &MF) const;
|
|
|
|
// Returns true if MF is a leaf procedure.
|
|
bool isLeafProc(MachineFunction &MF) const;
|
|
|
|
|
|
// Emits code for adjusting SP in function prologue/epilogue.
|
|
void emitSPAdjustment(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MBBI,
|
|
int NumBytes, unsigned ADDrr, unsigned ADDri) const;
|
|
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|