[llvm] r236049 - Avoid one more walk over all sections. NFC.

[Rafael Espindola]

Author: rafael
Date: Tue Apr 28 17:03:22 2015
New Revision: 236049

URL: http://llvm.org/viewvc/llvm-project?rev=236049&view=rev
Log:
Avoid one more walk over all sections. NFC.

Set the group section index as they are created.

Modified:
    llvm/trunk/lib/MC/ELFObjectWriter.cpp

Modified: llvm/trunk/lib/MC/ELFObjectWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/ELFObjectWriter.cpp?rev=236049&r1=236048&r2=236049&view=diff
==============================================================================
--- llvm/trunk/lib/MC/ELFObjectWriter.cpp (original)
+++ llvm/trunk/lib/MC/ELFObjectWriter.cpp Tue Apr 28 17:03:22 2015
@@ -957,15 +957,6 @@ void ELFObjectWriter::maybeAddToGroup(MC
 void ELFObjectWriter::computeIndexMap(
     MCAssembler &Asm, std::vector<const MCSectionELF *> &Sections,
     SectionIndexMapTy &SectionIndexMap, const RevGroupMapTy &RevGroupMap) {
-  for (const MCSectionData &SD : Asm) {
-    const MCSectionELF &Section =
-        static_cast<const MCSectionELF &>(SD.getSection());
-    if (Section.getType() != ELF::SHT_GROUP)
-      continue;
-    Sections.push_back(&Section);
-    SectionIndexMap[&Section] = Sections.size();
-  }
-
   std::vector<const MCSectionELF *> RelSections;
   for (const MCSectionData &SD : Asm) {
     const MCSectionELF &Section =
@@ -1465,6 +1456,9 @@ void ELFObjectWriter::createIndexedSecti
     const MCSectionELF *&Group = RevGroupMap[SignatureSymbol];
     if (!Group) {
       Group = Ctx.createELFGroupSection(SignatureSymbol);
+      Sections.push_back(Group);
+      SectionIndexMap[Group] = Sections.size();
+
       MCSectionData &Data = Asm.getOrCreateSectionData(*Group);
       Data.setAlignment(4);
       MCDataFragment *F = new MCDataFragment(&Data);