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Given two identical weak functions, produce one internal function and two weak

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thunks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73230 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2009-06-12 15:56:56 +00:00
parent 7e0842fb21
commit 8728d7a3ea
2 changed files with 30 additions and 4 deletions
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21
lib/Transforms/IPO/MergeFunctions.cpp
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@ -458,8 +458,8 @@ static LinkageCategory categorize(const Function *F) {
}
static void ThunkGToF(Function *F, Function *G) {
Function *NewG = Function::Create(G->getFunctionType(), G->getLinkage(),
"", G->getParent());
Function *NewG = Function::Create(G->getFunctionType(), G->getLinkage(), "",
G->getParent());
BasicBlock *BB = BasicBlock::Create("", NewG);
std::vector<Value *> Args;
@ -539,8 +539,21 @@ static bool fold(std::vector<Function *> &FnVec, unsigned i, unsigned j) {
}
break;
case ExternalWeak:
return false;
case ExternalWeak: {
assert(catG == ExternalWeak);
// Make them both thunks to the same internal function.
F->setAlignment(std::max(F->getAlignment(), G->getAlignment()));
Function *H = Function::Create(F->getFunctionType(), F->getLinkage(), "",
F->getParent());
H->copyAttributesFrom(F);
H->takeName(F);
ThunkGToF(F, G);
ThunkGToF(F, H);
F->setLinkage(GlobalValue::InternalLinkage);
} break;
case Internal:
switch (catG) {