mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 19:12:56 +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
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
//===-- MipsFrameLowering.h - Define frame lowering for Mips ----*- 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_MIPS_MIPSFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_MIPS_MIPSFRAMELOWERING_H
|
|
|
|
#include "Mips.h"
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
class MipsSubtarget;
|
|
|
|
class MipsFrameLowering : public TargetFrameLowering {
|
|
protected:
|
|
const MipsSubtarget &STI;
|
|
|
|
public:
|
|
explicit MipsFrameLowering(const MipsSubtarget &sti, unsigned Alignment)
|
|
: TargetFrameLowering(StackGrowsDown, Alignment, 0, Alignment), STI(sti) {}
|
|
|
|
static const MipsFrameLowering *create(const MipsSubtarget &ST);
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
|
|
bool hasBP(const MachineFunction &MF) const;
|
|
|
|
bool isFPCloseToIncomingSP() const override { return false; }
|
|
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) const override;
|
|
|
|
protected:
|
|
uint64_t estimateStackSize(const MachineFunction &MF) const;
|
|
};
|
|
|
|
/// Create MipsFrameLowering objects.
|
|
const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST);
|
|
const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST);
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|