#include "llvm/Support/COFF.h"
namespace llvm {
+class MCSymbol;
/// MCSectionCOFF - This represents a section on Windows
class MCSectionCOFF : public MCSection {
// The memory for this string is stored in the same MCContext as *this.
StringRef SectionName;
+ // FIXME: The following fields should not be mutable, but are for now so
+ // the asm parser can honor the .linkonce directive.
+
/// Characteristics - This is the Characteristics field of a section,
- // drawn from the enums below.
- unsigned Characteristics;
+ /// drawn from the enums below.
+ mutable unsigned Characteristics;
+
+ /// The COMDAT symbol of this section. Only valid if this is a COMDAT
+ /// section. Two COMDAT sections are merged if they have the same
+ /// COMDAT symbol.
+ MCSymbol *COMDATSymbol;
/// Selection - This is the Selection field for the section symbol, if
/// it is a COMDAT section (Characteristics & IMAGE_SCN_LNK_COMDAT) != 0
- int Selection;
+ mutable int Selection;
private:
friend class MCContext;
MCSectionCOFF(StringRef Section, unsigned Characteristics,
- int Selection, SectionKind K)
- : MCSection(SV_COFF, K), SectionName(Section),
- Characteristics(Characteristics), Selection (Selection) {
+ MCSymbol *COMDATSymbol, int Selection, SectionKind K,
+ MCSymbol *Begin)
+ : MCSection(SV_COFF, K, Begin), SectionName(Section),
+ Characteristics(Characteristics), COMDATSymbol(COMDATSymbol),
+ Selection(Selection) {
assert ((Characteristics & 0x00F00000) == 0 &&
"alignment must not be set upon section creation");
}
- ~MCSectionCOFF();
+ ~MCSectionCOFF() override;
public:
/// ShouldOmitSectionDirective - Decides whether a '.section' directive
bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
StringRef getSectionName() const { return SectionName; }
- virtual std::string getLabelBeginName() const {
- return SectionName.str() + "_begin";
- }
- virtual std::string getLabelEndName() const {
- return SectionName.str() + "_end";
- }
unsigned getCharacteristics() const { return Characteristics; }
- int getSelection () const { return Selection; }
+ MCSymbol *getCOMDATSymbol() const { return COMDATSymbol; }
+ int getSelection() const { return Selection; }
+
+ void setSelection(int Selection) const;
- virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
- raw_ostream &OS) const;
- virtual bool UseCodeAlign() const;
- virtual bool isVirtualSection() const;
+ void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
+ const MCExpr *Subsection) const override;
+ bool UseCodeAlign() const override;
+ bool isVirtualSection() const override;
static bool classof(const MCSection *S) {
return S->getVariant() == SV_COFF;