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Also remove functions that use complex constant expressions in terms of

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another function.

llvm-svn: 122705
This commit is contained in:
Nick Lewycky 2011-01-02 19:16:44 +00:00
parent c78e4bc366
commit 06b94a5e5b
1 changed files with 18 additions and 5 deletions
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23
lib/Transforms/IPO/MergeFunctions.cpp
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@ -696,11 +696,24 @@ void MergeFunctions::Remove(Function *F) {
// RemoveUsers - For each instruction used by the value, Remove() the function
// that contains the instruction. This should happen right before a call to RAUW.
void MergeFunctions::RemoveUsers(Value *V) {
for (Value::use_iterator UI = V->use_begin(), UE = V->use_end();
UI != UE; ++UI) {
Use &U = UI.getUse();
if (Instruction *I = dyn_cast<Instruction>(U.getUser())) {
Remove(I->getParent()->getParent());
std::vector<Value *> Worklist;
Worklist.push_back(V);
while (!Worklist.empty()) {
Value *V = Worklist.back();
Worklist.pop_back();
for (Value::use_iterator UI = V->use_begin(), UE = V->use_end();
UI != UE; ++UI) {
Use &U = UI.getUse();
if (Instruction *I = dyn_cast<Instruction>(U.getUser())) {
Remove(I->getParent()->getParent());
} else if (isa<GlobalValue>(U.getUser())) {
// do nothing
} else if (Constant *C = dyn_cast<Constant>(U.getUser())) {
for (Value::use_iterator CUI = C->use_begin(), CUE = C->use_end();
CUI != CUE; ++CUI)
Worklist.push_back(*CUI);
}
}
}
}