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Disable tail duplication in a case that breaks on Olden/tsp
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12021 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -135,6 +135,10 @@ bool TailDup::canEliminateUnconditionalBranch(TerminatorInst *TI) {
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Instruction *User = cast<Instruction>(*UI);
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if (User->getParent() != Tail && User->getParent() != BB)
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return false;
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// The 'swap' problem foils the tail duplication rewriting code.
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if (isa<PHINode>(User) && User->getParent() == Tail)
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return false;
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}
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return true;
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}
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@ -42,7 +42,7 @@ using namespace llvm;
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namespace {
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Statistic<> NumLowered("lowerinvoke", "Number of invoke & unwinds replaced");
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cl::opt<bool> ExpensiveEHSupport("enable-correct-eh-support",
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cl::opt<bool> ExpensiveEHSupport("enable-correct-eh-support",
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cl::desc("Make the -lowerinvoke pass insert expensive, but correct, EH code"));
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class LowerInvoke : public FunctionPass {
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