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llvm-extract changes linkages so that functions on both sides of the

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split module can see each other. If it is keeping a symbol that already has
a non local linkage, it doesn't need to change it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166908 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2012-10-29 01:59:03 +00:00
parent c0916d30e0
commit 9cb90e7c15
3 changed files with 53 additions and 16 deletions
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lib/Transforms/IPO/ExtractGV.cpp
+25 -12
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@@ -51,32 +51,44 @@ namespace {
// Visit the GlobalVariables.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (deleteStuff == (bool)Named.count(I) && !I->isDeclaration()) {
I->setInitializer(0);
} else {
bool Delete =
deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
if (!Delete) {
if (I->hasAvailableExternallyLinkage())
continue;
if (I->getName() == "llvm.global_ctors")
continue;
}
if (I->hasLocalLinkage())
bool Local = I->hasLocalLinkage();
if (Local)
I->setVisibility(GlobalValue::HiddenVisibility);
I->setLinkage(GlobalValue::ExternalLinkage);
if (Local || Delete)
I->setLinkage(GlobalValue::ExternalLinkage);
if (Delete)
I->setInitializer(0);
}
// Visit the Functions.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
if (deleteStuff == (bool)Named.count(I) && !I->isDeclaration()) {
I->deleteBody();
} else {
bool Delete =
deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
if (!Delete) {
if (I->hasAvailableExternallyLinkage())
continue;
}
if (I->hasLocalLinkage())
bool Local = I->hasLocalLinkage();
if (Local)
I->setVisibility(GlobalValue::HiddenVisibility);
I->setLinkage(GlobalValue::ExternalLinkage);
if (Local || Delete)
I->setLinkage(GlobalValue::ExternalLinkage);
if (Delete)
I->deleteBody();
}
// Visit the Aliases.
@@ -85,9 +97,10 @@ namespace {
Module::alias_iterator CurI = I;
++I;
if (CurI->hasLocalLinkage())
if (CurI->hasLocalLinkage()) {
CurI->setVisibility(GlobalValue::HiddenVisibility);
CurI->setLinkage(GlobalValue::ExternalLinkage);
CurI->setLinkage(GlobalValue::ExternalLinkage);
}
if (deleteStuff == (bool)Named.count(CurI)) {
Type *Ty = CurI->getType()->getElementType();