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09b02c8ddd
unwind encoding for that function. This simply crawls through the prolog looking for machine instrs marked as "frame setup". It can calculate from these what the compact unwind should look like. This is currently disabled because of needed linker support. But initial tests look good. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135922 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
//=-- X86TargetFrameLowering.h - Define frame lowering for X86 ---*- 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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// This class implements X86-specific bits of TargetFrameLowering class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef X86_FRAMELOWERING_H
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#define X86_FRAMELOWERING_H
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#include "X86Subtarget.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/Target/TargetFrameLowering.h"
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namespace llvm {
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class MCSymbol;
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class X86TargetMachine;
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class X86FrameLowering : public TargetFrameLowering {
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const X86TargetMachine &TM;
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const X86Subtarget &STI;
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public:
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explicit X86FrameLowering(const X86TargetMachine &tm, const X86Subtarget &sti)
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: TargetFrameLowering(StackGrowsDown,
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sti.getStackAlignment(),
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(sti.is64Bit() ? -8 : -4)),
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TM(tm), STI(sti) {
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}
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void emitCalleeSavedFrameMoves(MachineFunction &MF, MCSymbol *Label,
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unsigned FramePtr) const;
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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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void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
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RegScavenger *RS = NULL) 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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int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
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uint32_t getCompactUnwindEncoding(MachineFunction &MF) const;
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};
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} // End llvm namespace
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#endif
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