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use std::vector instead of std::list for both Section and Symbol lists because

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we care more about random access than insertion/deletion of elements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75828 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes
2009-07-15 20:49:10 +00:00
parent cf20031f60
commit 4b70fab658
5 changed files with 193 additions and 190 deletions
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29
lib/CodeGen/ELFWriter.h
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@@ -16,7 +16,6 @@
#include "llvm/ADT/SetVector.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include <list>
#include <map>
namespace llvm {
@@ -95,13 +94,13 @@ namespace llvm {
BinaryObject ElfHdr;
/// SectionList - This is the list of sections that we have emitted to the
/// file. Once the file has been completely built, the section header table
/// file. Once the file has been completely built, the section header table
/// is constructed from this info.
std::list<ELFSection> SectionList;
std::vector<ELFSection*> SectionList;
unsigned NumSections; // Always = SectionList.size()
/// SectionLookup - This is a mapping from section name to section number in
/// the SectionList.
/// the SectionList. Used to quickly gather the Section Index from TAI names
std::map<std::string, ELFSection*> SectionLookup;
/// GblSymLookup - This is a mapping from global value to a symbol index
@@ -109,17 +108,18 @@ namespace llvm {
/// must be quickly mapped to a symbol table index
std::map<const GlobalValue*, uint32_t> GblSymLookup;
/// SymbolList - This is the list of symbols emitted to the symbol table
/// Local symbols go to the front and Globals to the back.
std::list<ELFSym> SymbolList;
/// SymbolList - This is the list of symbols emitted to the symbol table.
/// When the SymbolList is finally built, local symbols must be placed in
/// the beginning while non-locals at the end.
std::vector<ELFSym*> SymbolList;
/// PendingGlobals - List of externally defined symbols that we have been
/// asked to emit, but have not seen a reference to. When a reference
/// is seen, the symbol will move from this list to the SymbolList.
SetVector<GlobalValue*> PendingGlobals;
// Remove tab from section name prefix. This is necessary becase TAI
// sometimes return a section name prefixed with a "\t" char. This is
// Remove tab from section name prefix. This is necessary becase TAI
// sometimes return a section name prefixed with elf unused chars. This is
// a little bit dirty. FIXME: find a better approach, maybe add more
// methods to TAI to get the clean name?
void fixNameForSection(std::string &Name) {
@@ -140,14 +140,14 @@ namespace llvm {
/// section if one does not already exist.
ELFSection &getSection(const std::string &Name, unsigned Type,
unsigned Flags = 0, unsigned Align = 0) {
std::string SectionName(Name);
fixNameForSection(SectionName);
std::string SName(Name);
fixNameForSection(SName);
ELFSection *&SN = SectionLookup[SectionName];
ELFSection *&SN = SectionLookup[SName];
if (SN) return *SN;
SectionList.push_back(ELFSection(SectionName, isLittleEndian, is64Bit));
SN = &SectionList.back();
SectionList.push_back(new ELFSection(SName, isLittleEndian, is64Bit));
SN = SectionList.back();
SN->SectionIdx = NumSections++;
SN->Type = Type;
SN->Flags = Flags;
@@ -245,6 +245,7 @@ namespace llvm {
void EmitSymbolTable();
void EmitStringTable();
void OutputSectionsAndSectionTable();
unsigned SortSymbols();
};
}