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Fix for 2006-06-26-MultipleExitsSingleBlock.
If a single exit block has multiple predecessors within the loop, it will appear in the exit blocks list more than once. LCSSA needs to take that into account so that it doesn't double process that exit block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28750 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -155,13 +155,16 @@ void LCSSA::processInstruction(Instruction* Instr,
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std::vector<PHINode*> workList;
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for (std::vector<BasicBlock*>::const_iterator BBI = exitBlocks.begin(),
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BBE = exitBlocks.end(); BBI != BBE; ++BBI)
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if (DT->getNode(Instr->getParent())->dominates(DT->getNode(*BBI))) {
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PHINode *phi = new PHINode(Instr->getType(), Instr->getName()+".lcssa",
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BBE = exitBlocks.end(); BBI != BBE; ++BBI) {
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Instruction*& phi = Phis[*BBI];
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if (phi == 0 &&
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DT->getNode(Instr->getParent())->dominates(DT->getNode(*BBI))) {
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phi = new PHINode(Instr->getType(), Instr->getName()+".lcssa",
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(*BBI)->begin());
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workList.push_back(phi);
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workList.push_back(cast<PHINode>(phi));
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Phis[*BBI] = phi;
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}
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}
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// Phi nodes that need to have their incoming values filled.
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std::vector<PHINode*> needIncomingValues;
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