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db6cbe1ff1
add <rd>, sp, #<imm8> ldr <rd>, [sp, #<imm8>] When the offset from sp is multiple of 4 and in range of 0-1020. This saves code size by utilizing 16-bit instructions. rdar://9321541 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129971 91177308-0d34-0410-b5e6-96231b3b80d8
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
//==-- ARMTargetFrameLowering.h - Define frame lowering for ARM --*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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//
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//
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//===----------------------------------------------------------------------===//
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#ifndef ARM_FRAMEINFO_H
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#define ARM_FRAMEINFO_H
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#include "ARM.h"
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#include "ARMSubtarget.h"
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#include "llvm/Target/TargetFrameLowering.h"
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namespace llvm {
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class ARMSubtarget;
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class ARMFrameLowering : public TargetFrameLowering {
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protected:
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const ARMSubtarget &STI;
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public:
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explicit ARMFrameLowering(const ARMSubtarget &sti)
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: TargetFrameLowering(StackGrowsDown, sti.getStackAlignment(), 0, 4),
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STI(sti) {
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}
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/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
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/// the function.
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void emitPrologue(MachineFunction &MF) const;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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const std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const;
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bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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const std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const;
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bool hasFP(const MachineFunction &MF) const;
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bool hasReservedCallFrame(const MachineFunction &MF) const;
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bool canSimplifyCallFramePseudos(const MachineFunction &MF) const;
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int getFrameIndexReference(const MachineFunction &MF, int FI,
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unsigned &FrameReg) const;
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int ResolveFrameIndexReference(const MachineFunction &MF,
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int FI,
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unsigned &FrameReg, int SPAdj) const;
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int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
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void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
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RegScavenger *RS) const;
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private:
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void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
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const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc,
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unsigned StrOpc, bool NoGap,
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bool(*Func)(unsigned, bool),
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unsigned MIFlags = 0) const;
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void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
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const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc,
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unsigned LdrOpc, bool isVarArg, bool NoGap,
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bool(*Func)(unsigned, bool)) const;
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};
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} // End llvm namespace
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#endif
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