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a previous patch completely disabled trivial unswitching, this fixees it.
Thanks to nate for pointing this out :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26280 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -168,7 +168,6 @@ static bool isTrivialLoopExitBlockHelper(Loop *L, BasicBlock *BB,
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static BasicBlock *isTrivialLoopExitBlock(Loop *L, BasicBlock *BB) {
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std::set<BasicBlock*> Visited;
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Visited.insert(L->getHeader()); // Branches to header are ok.
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Visited.insert(BB); // Don't revisit BB after we do.
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BasicBlock *ExitBB = 0;
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if (isTrivialLoopExitBlockHelper(L, BB, ExitBB, Visited))
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return ExitBB;
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