ad4a582fd9
Some targets (e.g. PPC and Hexagon) already did this. I think it's best to do this consistently so that frontend authors don't run into inconsistent results when they emit `naked` functions. For example, in Zig, we had to change our emit code to also set `frame-pointer=none` to get reliable results across targets. Note: I don't have commit access.
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
//===-- LanaiFrameLowering.h - Define frame lowering for Lanai --*- C++-*--===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class implements Lanai-specific bits of TargetFrameLowering class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_LANAI_LANAIFRAMELOWERING_H
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#define LLVM_LIB_TARGET_LANAI_LANAIFRAMELOWERING_H
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class BitVector;
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class LanaiSubtarget;
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class LanaiFrameLowering : public TargetFrameLowering {
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private:
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void determineFrameLayout(MachineFunction &MF) const;
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void replaceAdjDynAllocPseudo(MachineFunction &MF) const;
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protected:
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const LanaiSubtarget &STI;
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public:
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explicit LanaiFrameLowering(const LanaiSubtarget &Subtarget)
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: TargetFrameLowering(StackGrowsDown,
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/*StackAlignment=*/Align(8),
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/*LocalAreaOffset=*/0),
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STI(Subtarget) {}
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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, MachineBasicBlock &MBB) const override;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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MachineBasicBlock::iterator
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) 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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protected:
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bool hasFPImpl(const MachineFunction & /*MF*/) const override { return true; }
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};
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} // namespace llvm
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#endif // LLVM_LIB_TARGET_LANAI_LANAIFRAMELOWERING_H
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