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fix a significant difference between llvm and gcc on ELF systems:

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GCC would put weak zero initialized mutable data in the .bss section,
we would put it into a crasy '.gnu.linkonce.b.test,"aw",@nobits' 
section.  Fixing this will allow simplifications next up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-01-19 03:06:01 +00:00
parent a3839bc371
commit c7fbe90389
3 changed files with 20 additions and 3 deletions
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6
lib/Target/TargetLoweringObjectFile.cpp
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@ -565,7 +565,6 @@ static const char *getSectionPrefixForUniqueGlobal(SectionKind Kind) {
if (Kind.isThreadData()) return ".gnu.linkonce.td.";
if (Kind.isThreadBSS()) return ".gnu.linkonce.tb.";
if (Kind.isBSS()) return ".gnu.linkonce.b.";
if (Kind.isDataNoRel()) return ".gnu.linkonce.d.";
if (Kind.isDataRelLocal()) return ".gnu.linkonce.d.rel.local.";
if (Kind.isDataRel()) return ".gnu.linkonce.d.rel.";
@ -581,7 +580,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
// If this global is linkonce/weak and the target handles this by emitting it
// into a 'uniqued' section name, create and return the section now.
if (GV->isWeakForLinker() && !Kind.isCommon()) {
if (GV->isWeakForLinker() && !Kind.isCommon() && !Kind.isBSS()) {
const char *Prefix = getSectionPrefixForUniqueGlobal(Kind);
SmallString<128> Name;
Name.append(Prefix, Prefix+strlen(Prefix));
@ -634,6 +633,9 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
if (Kind.isThreadData()) return TLSDataSection;
if (Kind.isThreadBSS()) return TLSBSSSection;
// Note: we claim that common symbols are put in BSSSection, but they are
// really emitted with the magic .comm directive, which creates a symbol table
// entry but not a section.
if (Kind.isBSS() || Kind.isCommon()) return BSSSection;
if (Kind.isDataNoRel()) return DataSection;