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split the ELF-specific section flag inference-from-name code out

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into its own helper function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76974 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-07-24 16:50:24 +00:00
parent 8adc547a91
commit 27f3065cf3
1 changed files with 32 additions and 25 deletions
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57
lib/Target/TargetAsmInfo.cpp
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@ -189,8 +189,7 @@ static bool isConstantString(const Constant *C) {
}
static unsigned SectionFlagsForGlobal(const GlobalValue *GV,
SectionKind::Kind Kind,
const char *Name = 0) {
SectionKind::Kind Kind) {
unsigned Flags = SectionFlags::None;
// Decode flags from global itself.
@ -222,28 +221,28 @@ static unsigned SectionFlagsForGlobal(const GlobalValue *GV,
if (GV->isWeakForLinker())
Flags |= SectionFlags::Linkonce;
// Add flags from sections, if any.
if (Name && *Name != '\0') {
Flags |= SectionFlags::Named;
// Some lame default implementation based on some magic section names.
if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 ||
strncmp(Name, ".llvm.linkonce.b.", 17) == 0 ||
strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.sb.", 18) == 0)
Flags |= SectionFlags::BSS;
else if (strcmp(Name, ".tdata") == 0 ||
strncmp(Name, ".tdata.", 7) == 0 ||
strncmp(Name, ".gnu.linkonce.td.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.td.", 18) == 0)
Flags |= SectionFlags::TLS;
else if (strcmp(Name, ".tbss") == 0 ||
strncmp(Name, ".tbss.", 6) == 0 ||
strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.tb.", 18) == 0)
Flags |= SectionFlags::BSS | SectionFlags::TLS;
}
return Flags;
}
static unsigned GetSectionFlagsForNamedELFSection(const char *Name) {
unsigned Flags = 0;
// Some lame default implementation based on some magic section names.
if (strncmp(Name, ".gnu.linkonce.b.", 16) == 0 ||
strncmp(Name, ".llvm.linkonce.b.", 17) == 0 ||
strncmp(Name, ".gnu.linkonce.sb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.sb.", 18) == 0)
Flags |= SectionFlags::BSS;
else if (strcmp(Name, ".tdata") == 0 ||
strncmp(Name, ".tdata.", 7) == 0 ||
strncmp(Name, ".gnu.linkonce.td.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.td.", 18) == 0)
Flags |= SectionFlags::TLS;
else if (strcmp(Name, ".tbss") == 0 ||
strncmp(Name, ".tbss.", 6) == 0 ||
strncmp(Name, ".gnu.linkonce.tb.", 17) == 0 ||
strncmp(Name, ".llvm.linkonce.tb.", 18) == 0)
Flags |= SectionFlags::BSS | SectionFlags::TLS;
return Flags;
}
@ -291,8 +290,16 @@ const Section *TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
// Select section name
if (GV->hasSection()) {
// Honour section already set, if any.
unsigned Flags = SectionFlagsForGlobal(GV, SectionKindForGlobal(GV),
GV->getSection().c_str());
unsigned Flags = SectionFlagsForGlobal(GV, SectionKindForGlobal(GV));
// This is an explicitly named section.
Flags |= SectionFlags::Named;
// If the target has magic semantics for certain section names, make sure to
// pick up the flags. This allows the user to write things with attribute
// section and still get the appropriate section flags printed.
Flags |= GetSectionFlagsForNamedELFSection(GV->getSection().c_str());
return getNamedSection(GV->getSection().c_str(), Flags);
}