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Don't internalize llvm.global[cd]tor unless there are uses of it. This

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unbreaks front-ends that don't use __main (like the new CFE).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25429 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-19 00:40:39 +00:00
parent 8ff318b7fb
commit ee9e14cb8a
1 changed files with 9 additions and 3 deletions
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10
lib/Transforms/IPO/Internalize.cpp
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@ -125,13 +125,19 @@ bool InternalizePass::runOnModule(Module &M) {
// the list if it's empty. // the list if it's empty.
// //
if (I->hasAppendingLinkage() && (I->getName() == "llvm.global_ctors" || if (I->hasAppendingLinkage() && (I->getName() == "llvm.global_ctors" ||
I->getName() == "llvm.global_dtors")) I->getName() == "llvm.global_dtors")) {
I->setConstant(true); I->setConstant(true);
// If the global ctors/dtors list has no uses, do not internalize it, as
// there is no __main in this program, so the asmprinter should handle
// it.
if (I->use_empty()) continue;
}
I->setLinkage(GlobalValue::InternalLinkage); I->setLinkage(GlobalValue::InternalLinkage);
Changed = true; Changed = true;
++NumGlobals; ++NumGlobals;
DEBUG(std::cerr << "Internalizing gvar " << I->getName() << "\n"); DEBUG(std::cerr << "Internalized gvar " << I->getName() << "\n");
} }
return Changed; return Changed;