LLVM  8.0.0svn
AVRTargetObjectFile.cpp
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1 //===-- AVRTargetObjectFile.cpp - AVR Object Files ------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "AVRTargetObjectFile.h"
11 
12 #include "llvm/BinaryFormat/ELF.h"
13 #include "llvm/IR/DerivedTypes.h"
14 #include "llvm/IR/GlobalValue.h"
15 #include "llvm/IR/Mangler.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCSectionELF.h"
18 
19 #include "AVR.h"
20 
21 namespace llvm {
23  Base::Initialize(Ctx, TM);
24  ProgmemDataSection =
25  Ctx.getELFSection(".progmem.data", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
26 }
27 
28 MCSection *
31  const TargetMachine &TM) const {
32  // Global values in flash memory are placed in the progmem.data section
33  // unless they already have a user assigned section.
34  if (AVR::isProgramMemoryAddress(GO) && !GO->hasSection())
35  return ProgmemDataSection;
36 
37  // Otherwise, we work the same way as ELF.
38  return Base::SelectSectionForGlobal(GO, Kind, TM);
39 }
40 } // end of namespace llvm
41 
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
This class represents lattice values for constants.
Definition: AllocatorList.h:24
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
bool isProgramMemoryAddress(T *V)
Checks if a given type is a pointer to program memory.
Definition: AVR.h:44
Context object for machine code objects.
Definition: MCContext.h:63
SectionKind - This is a simple POD value that classifies the properties of a section.
Definition: SectionKind.h:23
bool hasSection() const
Check if this global has a custom object file section.
Definition: GlobalObject.h:82
const unsigned Kind
MCSectionELF * getELFSection(const Twine &Section, unsigned Type, unsigned Flags)
Definition: MCContext.h:389
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:59
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
void Initialize(MCContext &ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.