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+//===-- llvm/Target/TargetLoweringObjectFile.h - Object Info ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements classes used to handle lowerings specific to common
+// object file formats.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
+#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/SectionKind.h"
+
+namespace llvm {
+ class MachineModuleInfo;
+ class Mangler;
+ class MCContext;
+ class MCExpr;
+ class MCSection;
+ class MCSymbol;
+ class MCSymbolRefExpr;
+ class MCStreamer;
+ class GlobalValue;
+ class TargetMachine;
+
+class TargetLoweringObjectFile : public MCObjectFileInfo {
+ MCContext *Ctx;
+
+ TargetLoweringObjectFile(
+ const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
+ void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
+
+public:
+ MCContext &getContext() const { return *Ctx; }
+
+ TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0) {}
+
+ virtual ~TargetLoweringObjectFile();
+
+ /// Initialize - this method must be called before any actual lowering is
+ /// done. This specifies the current context for codegen, and gives the
+ /// lowering implementations a chance to set up their default sections.
+ virtual void Initialize(MCContext &ctx, const TargetMachine &TM);
+
+ virtual void emitPersonalityValue(MCStreamer &Streamer,
+ const TargetMachine &TM,
+ const MCSymbol *Sym) const;
+
+ /// emitModuleFlags - Emit the module flags that the platform cares about.
+ virtual void emitModuleFlags(MCStreamer &,
+ ArrayRef<Module::ModuleFlagEntry>,
+ Mangler *, const TargetMachine &) const {
+ }
+
+ /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
+ /// decide not to emit the UsedDirective for some symbols in llvm.used.
+ /// FIXME: REMOVE this (rdar://7071300)
+ virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
+ Mangler *) const {
+ return GV != 0;
+ }
+
+ /// getSectionForConstant - Given a constant with the SectionKind, return a
+ /// section that it should be placed in.
+ virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
+
+ /// getKindForGlobal - Classify the specified global variable into a set of
+ /// target independent categories embodied in SectionKind.
+ static SectionKind getKindForGlobal(const GlobalValue *GV,
+ const TargetMachine &TM);
+
+ /// SectionForGlobal - This method computes the appropriate section to emit
+ /// the specified global variable or function definition. This should not
+ /// be passed external (or available externally) globals.
+ const MCSection *SectionForGlobal(const GlobalValue *GV,
+ SectionKind Kind, Mangler *Mang,
+ const TargetMachine &TM) const;
+
+ /// SectionForGlobal - This method computes the appropriate section to emit
+ /// the specified global variable or function definition. This should not
+ /// be passed external (or available externally) globals.
+ const MCSection *SectionForGlobal(const GlobalValue *GV,
+ Mangler *Mang,
+ const TargetMachine &TM) const {
+ return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM);
+ }
+
+ /// getExplicitSectionGlobal - Targets should implement this method to assign
+ /// a section to globals with an explicit section specfied. The
+ /// implementation of this method can assume that GV->hasSection() is true.
+ virtual const MCSection *
+ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const = 0;
+
+ /// getSpecialCasedSectionGlobals - Allow the target to completely override
+ /// section assignment of a global.
+ virtual const MCSection *
+ getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang,
+ SectionKind Kind) const {
+ return 0;
+ }
+
+ /// getTTypeGlobalReference - Return an MCExpr to use for a reference
+ /// to the specified global variable from exception handling information.
+ ///
+ virtual const MCExpr *
+ getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding,
+ MCStreamer &Streamer) const;
+
+ // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
+ virtual MCSymbol *
+ getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
+ MachineModuleInfo *MMI) const;
+
+ ///
+ const MCExpr *
+ getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
+ MCStreamer &Streamer) const;
+
+ virtual const MCSection *
+ getStaticCtorSection(unsigned Priority = 65535) const {
+ (void)Priority;
+ return StaticCtorSection;
+ }
+ virtual const MCSection *
+ getStaticDtorSection(unsigned Priority = 65535) const {
+ (void)Priority;
+ return StaticDtorSection;
+ }
+
+protected:
+ virtual const MCSection *
+ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler *Mang, const TargetMachine &TM) const;
+};
+
+} // end namespace llvm
+
+#endif
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