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a36268215f
This changes TargetFrameLowering::processFunctionBeforeCalleeSavedScan(): - Rename the function to determineCalleeSaves() - Pass a bitset of callee saved registers by reference, thus avoiding the function-global PhysRegUsed bitset in MachineRegisterInfo. - Without PhysRegUsed the implementation is fine tuned to not save physcial registers which are only read but never modified. Related to rdar://21539507 Differential Revision: http://reviews.llvm.org/D10909 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242165 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
2.4 KiB
C++
64 lines
2.4 KiB
C++
//===-- XCoreFrameLowering.h - Frame info for XCore Target ------*- 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 file contains XCore frame information that doesn't fit anywhere else
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// cleanly...
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_XCORE_XCOREFRAMELOWERING_H
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#define LLVM_LIB_TARGET_XCORE_XCOREFRAMELOWERING_H
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#include "llvm/Target/TargetFrameLowering.h"
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#include "llvm/Target/TargetMachine.h"
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namespace llvm {
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class XCoreSubtarget;
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class XCoreFrameLowering: public TargetFrameLowering {
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public:
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XCoreFrameLowering(const XCoreSubtarget &STI);
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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,
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MachineBasicBlock &MBB) const override;
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void emitEpilogue(MachineFunction &MF,
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MachineBasicBlock &MBB) const override;
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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 override;
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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 override;
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void eliminateCallFramePseudoInstr(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const override;
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bool hasFP(const MachineFunction &MF) const override;
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS = nullptr) const override;
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void processFunctionBeforeFrameFinalized(MachineFunction &MF,
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RegScavenger *RS = nullptr) const override;
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//! Stack slot size (4 bytes)
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static int stackSlotSize() {
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return 4;
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}
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};
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}
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#endif
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