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Add r228980 back.

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Add support for having multiple sections with the same name and comdat.

Using this in combination with -ffunction-sections allows LLVM to output a .o
file with mulitple sections named .text. This saves space by avoiding long
unique names of the form .text.<C++ mangled name>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-02-17 20:48:01 +00:00
parent 84f0507260
commit e0a2541eb7
10 changed files with 72 additions and 29 deletions
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10
include/llvm/MC/MCSectionELF.h
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@@ -39,6 +39,8 @@ class MCSectionELF : public MCSection {
/// below.
unsigned Flags;
bool Unique;
/// EntrySize - The size of each entry in this section. This size only
/// makes sense for sections that contain fixed-sized entries. If a
/// section does not contain fixed-sized entries 'EntrySize' will be 0.
@@ -48,10 +50,10 @@ class MCSectionELF : public MCSection {
private:
friend class MCContext;
MCSectionELF(StringRef Section, unsigned type, unsigned flags,
SectionKind K, unsigned entrySize, const MCSymbol *group)
: MCSection(SV_ELF, K), SectionName(Section), Type(type), Flags(flags),
EntrySize(entrySize), Group(group) {}
MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K,
unsigned entrySize, const MCSymbol *group, bool Unique)
: MCSection(SV_ELF, K), SectionName(Section), Type(type), Flags(flags),
Unique(Unique), EntrySize(entrySize), Group(group) {}
~MCSectionELF();
void setSectionName(StringRef Name) { SectionName = Name; }