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[ELF] Inline InputSection::getParent. NFC 

Combined with the previous change, lld executable is ~2K smaller and some code
paths using InputSection::getParent are more efficient.

The fragmented headers lead to a design limitation that OutputSection has to be
incomplete, so we cannot use static_cast.
This commit is contained in:
Fangrui Song 2022-03-08 11:26:12 -08:00
parent 6c814931bc
commit 72bedf46c7
2 changed files with 3 additions and 5 deletions
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4
lld/ELF/InputSection.cpp
View File

@ -323,10 +323,6 @@ InputSection::InputSection(ObjFile<ELFT> &f, const typename ELFT::Shdr &header,
StringRef name)
: InputSectionBase(f, header, name, InputSectionBase::Regular) {}
OutputSection *InputSection::getParent() const {
return cast_or_null<OutputSection>(parent);
}
// Copy SHT_GROUP section contents. Used only for the -r option.
template <class ELFT> void InputSection::copyShtGroup(uint8_t *buf) {
// ELFT::Word is the 32-bit integral type in the target endianness.

4
lld/ELF/InputSection.h
View File

@ -348,7 +348,9 @@ public:
// beginning of the output section.
template <class ELFT> void writeTo(uint8_t *buf);
OutputSection *getParent() const;
OutputSection *getParent() const {
return reinterpret_cast<OutputSection *>(parent);
}
// This variable has two usages. Initially, it represents an index in the
// OutputSection's InputSection list, and is used when ordering SHF_LINK_ORDER