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Use more terse and precise linkage checks.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76237 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-07-17 21:00:50 +00:00
parent 8906f95006
commit 3e0f60be46
1 changed files with 6 additions and 15 deletions
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21
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@ -147,35 +147,26 @@ void DwarfException::EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
assert(!EHFrameInfo.function->hasAvailableExternallyLinkage() &&
"Should not emit 'available externally' functions at all");
Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
const Function *TheFunc = EHFrameInfo.function;
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
// Externally visible entry into the functions eh frame info. If the
// corresponding function is static, this should not be externally visible.
if (linkage != Function::InternalLinkage &&
linkage != Function::PrivateLinkage) {
if (!TheFunc->hasLocalLinkage())
if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
}
// If corresponding function is weak definition, this should be too.
if ((linkage == Function::WeakAnyLinkage ||
linkage == Function::WeakODRLinkage ||
linkage == Function::LinkOnceAnyLinkage ||
linkage == Function::LinkOnceODRLinkage) &&
TAI->getWeakDefDirective())
if (TheFunc->isWeakForLinker() && TAI->getWeakDefDirective())
O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
// If there are no calls then you can't unwind. This may mean we can omit the
// EH Frame, but some environments do not handle weak absolute symbols. If
// UnwindTablesMandatory is set we cannot do this optimization; the unwind
// info is to be available for non-EH uses.
if (!EHFrameInfo.hasCalls &&
!UnwindTablesMandatory &&
((linkage != Function::WeakAnyLinkage &&
linkage != Function::WeakODRLinkage &&
linkage != Function::LinkOnceAnyLinkage &&
linkage != Function::LinkOnceODRLinkage) ||
if (!EHFrameInfo.hasCalls && !UnwindTablesMandatory &&
(!TheFunc->isWeakForLinker() ||
!TAI->getWeakDefDirective() ||
TAI->getSupportsWeakOmittedEHFrame())) {
O << EHFrameInfo.FnName << " = 0\n";