LLVM 19.0.0git
PPCELFStreamer.h
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1//===- PPCELFStreamer.h - ELF Object Output --------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This is a custom MCELFStreamer for PowerPC.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
14#define LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
15
17#include <memory>
18
19namespace llvm {
20
21class MCAsmBackend;
22class MCCodeEmitter;
23class MCContext;
24class MCSubtargetInfo;
25
27 // We need to keep track of the last label we emitted (only one) because
28 // depending on whether the label is on the same line as an aligned
29 // instruction or not, the label may refer to the instruction or the nop.
30 MCSymbol *LastLabel;
31 SMLoc LastLabelLoc;
32
33public:
34 PPCELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> MAB,
35 std::unique_ptr<MCObjectWriter> OW,
36 std::unique_ptr<MCCodeEmitter> Emitter);
37
38 void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
39
40 // EmitLabel updates LastLabel and LastLabelLoc when a new label is emitted.
41 void emitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
42private:
43 void emitPrefixedInstruction(const MCInst &Inst, const MCSubtargetInfo &STI);
44 void emitGOTToPCRelReloc(const MCInst &Inst);
45 void emitGOTToPCRelLabel(const MCInst &Inst);
46};
47
48// Check if the instruction Inst is part of a pair of instructions that make up
49// a link time GOT PC Rel optimization.
50std::optional<bool> isPartOfGOTToPCRelPair(const MCInst &Inst,
51 const MCSubtargetInfo &STI);
52
54 std::unique_ptr<MCAsmBackend> MAB,
55 std::unique_ptr<MCObjectWriter> OW,
56 std::unique_ptr<MCCodeEmitter> Emitter);
57} // end namespace llvm
58
59#endif // LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
dxil DXContainer Global Emitter
Context object for machine code objects.
Definition: MCContext.h:82
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
Generic base class for all target subtargets.
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:40
void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override
Emit the given Instruction into the current section.
void emitLabel(MCSymbol *Symbol, SMLoc Loc=SMLoc()) override
Emit a label for Symbol into the current section.
Represents a location in source code.
Definition: SMLoc.h:23
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
MCELFStreamer * createPPCELFStreamer(MCContext &Context, std::unique_ptr< MCAsmBackend > MAB, std::unique_ptr< MCObjectWriter > OW, std::unique_ptr< MCCodeEmitter > Emitter)
std::optional< bool > isPartOfGOTToPCRelPair(const MCInst &Inst, const MCSubtargetInfo &STI)