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93cf0939f9
This allows constructing a Mangler with just a TargetMachine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193630 91177308-0d34-0410-b5e6-96231b3b80d8
158 lines
6.0 KiB
C++
158 lines
6.0 KiB
C++
//===-- llvm/Target/TargetLoweringObjectFile.h - Object Info ----*- 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 implements classes used to handle lowerings specific to common
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// object file formats.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
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#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/IR/Module.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/SectionKind.h"
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namespace llvm {
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class MachineModuleInfo;
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class Mangler;
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class MCContext;
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class MCExpr;
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class MCSection;
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class MCSymbol;
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class MCSymbolRefExpr;
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class MCStreamer;
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class GlobalValue;
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class TargetMachine;
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class TargetLoweringObjectFile : public MCObjectFileInfo {
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MCContext *Ctx;
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TargetLoweringObjectFile(
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const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
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void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
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public:
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MCContext &getContext() const { return *Ctx; }
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TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0) {}
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virtual ~TargetLoweringObjectFile();
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/// Initialize - this method must be called before any actual lowering is
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/// done. This specifies the current context for codegen, and gives the
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/// lowering implementations a chance to set up their default sections.
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virtual void Initialize(MCContext &ctx, const TargetMachine &TM);
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virtual void emitPersonalityValue(MCStreamer &Streamer,
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const TargetMachine &TM,
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const MCSymbol *Sym) const;
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/// emitModuleFlags - Emit the module flags that the platform cares about.
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virtual void emitModuleFlags(MCStreamer &,
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ArrayRef<Module::ModuleFlagEntry>,
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Mangler *, const TargetMachine &) const {
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}
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/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
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/// decide not to emit the UsedDirective for some symbols in llvm.used.
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/// FIXME: REMOVE this (rdar://7071300)
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virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
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Mangler *) const {
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return GV != 0;
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}
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/// getSectionForConstant - Given a constant with the SectionKind, return a
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/// section that it should be placed in.
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virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
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/// getKindForGlobal - Classify the specified global variable into a set of
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/// target independent categories embodied in SectionKind.
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static SectionKind getKindForGlobal(const GlobalValue *GV,
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const TargetMachine &TM);
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/// SectionForGlobal - This method computes the appropriate section to emit
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/// the specified global variable or function definition. This should not
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/// be passed external (or available externally) globals.
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const MCSection *SectionForGlobal(const GlobalValue *GV,
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SectionKind Kind, Mangler *Mang,
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const TargetMachine &TM) const;
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/// SectionForGlobal - This method computes the appropriate section to emit
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/// the specified global variable or function definition. This should not
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/// be passed external (or available externally) globals.
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const MCSection *SectionForGlobal(const GlobalValue *GV,
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Mangler *Mang,
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const TargetMachine &TM) const {
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return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM);
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}
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/// getExplicitSectionGlobal - Targets should implement this method to assign
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/// a section to globals with an explicit section specfied. The
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/// implementation of this method can assume that GV->hasSection() is true.
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virtual const MCSection *
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getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler *Mang, const TargetMachine &TM) const = 0;
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/// getSpecialCasedSectionGlobals - Allow the target to completely override
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/// section assignment of a global.
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virtual const MCSection *
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getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang,
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SectionKind Kind) const {
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return 0;
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}
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/// getTTypeGlobalReference - Return an MCExpr to use for a reference
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/// to the specified global variable from exception handling information.
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///
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virtual const MCExpr *
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getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
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MachineModuleInfo *MMI, unsigned Encoding,
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MCStreamer &Streamer) const;
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/// Return the MCSymbol for the specified global value. This symbol is the
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/// main label that is the address of the global
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MCSymbol *getSymbol(Mangler &M, const GlobalValue *GV) const;
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// getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
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virtual MCSymbol *
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getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
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MachineModuleInfo *MMI) const;
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///
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const MCExpr *
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getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
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MCStreamer &Streamer) const;
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virtual const MCSection *
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getStaticCtorSection(unsigned Priority = 65535) const {
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(void)Priority;
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return StaticCtorSection;
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}
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virtual const MCSection *
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getStaticDtorSection(unsigned Priority = 65535) const {
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(void)Priority;
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return StaticDtorSection;
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}
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/// \brief Create a symbol reference to describe the given TLS variable when
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/// emitting the address in debug info.
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virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
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protected:
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virtual const MCSection *
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SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler *Mang, const TargetMachine &TM) const;
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};
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} // end namespace llvm
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#endif
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