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synced 2024-08-19 19:29:31 +00:00
switch the inliner from being recursive to being iterative.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34832 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -175,7 +175,8 @@ namespace {
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/// CloneBlock - The specified block is found to be reachable, clone it and
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/// anything that it can reach.
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void CloneBlock(const BasicBlock *BB);
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void CloneBlock(const BasicBlock *BB,
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std::vector<const BasicBlock*> &ToClone);
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public:
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/// ConstantFoldMappedInstruction - Constant fold the specified instruction,
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@ -186,7 +187,8 @@ namespace {
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/// CloneBlock - The specified block is found to be reachable, clone it and
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/// anything that it can reach.
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void PruningFunctionCloner::CloneBlock(const BasicBlock *BB) {
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void PruningFunctionCloner::CloneBlock(const BasicBlock *BB,
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std::vector<const BasicBlock*> &ToClone){
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Value *&BBEntry = ValueMap[BB];
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// Have we already cloned this block?
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@ -240,7 +242,7 @@ void PruningFunctionCloner::CloneBlock(const BasicBlock *BB) {
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if (Cond) {
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BasicBlock *Dest = BI->getSuccessor(!Cond->getZExtValue());
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ValueMap[OldTI] = new BranchInst(Dest, NewBB);
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CloneBlock(Dest);
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ToClone.push_back(Dest);
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TerminatorDone = true;
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}
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}
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@ -252,7 +254,7 @@ void PruningFunctionCloner::CloneBlock(const BasicBlock *BB) {
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if (Cond) { // Constant fold to uncond branch!
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BasicBlock *Dest = SI->getSuccessor(SI->findCaseValue(Cond));
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ValueMap[OldTI] = new BranchInst(Dest, NewBB);
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CloneBlock(Dest);
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ToClone.push_back(Dest);
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TerminatorDone = true;
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}
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}
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@ -267,7 +269,7 @@ void PruningFunctionCloner::CloneBlock(const BasicBlock *BB) {
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// Recursively clone any reachable successor blocks.
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const TerminatorInst *TI = BB->getTerminator();
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for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
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CloneBlock(TI->getSuccessor(i));
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ToClone.push_back(TI->getSuccessor(i));
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}
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if (CodeInfo) {
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@ -322,7 +324,13 @@ void llvm::CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
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NameSuffix, CodeInfo, TD);
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// Clone the entry block, and anything recursively reachable from it.
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PFC.CloneBlock(&OldFunc->getEntryBlock());
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std::vector<const BasicBlock*> CloneWorklist;
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CloneWorklist.push_back(&OldFunc->getEntryBlock());
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while (!CloneWorklist.empty()) {
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const BasicBlock *BB = CloneWorklist.back();
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CloneWorklist.pop_back();
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PFC.CloneBlock(BB, CloneWorklist);
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}
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// Loop over all of the basic blocks in the old function. If the block was
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// reachable, we have cloned it and the old block is now in the value map:
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