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Avoid if-converting simple block that ends with unconditional branch or fallthrough unless it branches / falls to the 'false' block. Not profitable, may end up increasing code size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37660 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -399,6 +399,9 @@ bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups) const {
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if (TrueBBI.IsBeingAnalyzed || TrueBBI.IsDone)
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return false;
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if (TrueBBI.IsBrAnalyzable)
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return false;
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if (TrueBBI.BB->pred_size() > 1) {
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if (TrueBBI.CannotBeCopied ||
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TrueBBI.NonPredSize > TLI->getIfCvtDupBlockSizeLimit())
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@ -406,7 +409,7 @@ bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups) const {
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Dups = TrueBBI.NonPredSize;
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}
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return !blockAlwaysFallThrough(TrueBBI) && TrueBBI.BrCond.size() == 0;
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return true;
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}
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/// ValidTriangle - Returns true if the 'true' and 'false' blocks (along
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