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Global variables with APPENDING linkage are very important to keep around!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8632 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-09-20 19:00:50 +00:00
parent 894263bc9f
commit a2d51afd79
1 changed files with 6 additions and 3 deletions
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9
lib/Transforms/IPO/GlobalDCE.cpp
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@ -48,14 +48,17 @@ bool GlobalDCE::run(Module &M) {
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
Changed |= RemoveUnusedConstantPointerRef(*I);
// Functions with external linkage are needed if they have a body
if (I->hasExternalLinkage() && !I->isExternal())
if ((!I->hasInternalLinkage() && !I->hasLinkOnceLinkage()) &&
!I->isExternal())
GlobalIsNeeded(I);
}
for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
Changed |= RemoveUnusedConstantPointerRef(*I);
// Externally visible globals are needed, if they have an initializer.
if (I->hasExternalLinkage() && !I->isExternal())
// Externally visible & appending globals are needed, if they have an
// initializer.
if ((!I->hasInternalLinkage() && !I->hasLinkOnceLinkage()) &&
!I->isExternal())
GlobalIsNeeded(I);
}