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Fix ScalarEvolution::isLoopGuardedByCond to accept a null Loop*, for
consistency with other routines that use a null Loop* to mean code not contained by any loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72008 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3328,6 +3328,10 @@ ScalarEvolution::getPredecessorWithUniqueSuccessorForBB(BasicBlock *BB) {
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bool ScalarEvolution::isLoopGuardedByCond(const Loop *L,
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ICmpInst::Predicate Pred,
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const SCEV *LHS, const SCEV *RHS) {
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// Interpret a null as meaning no loop, where there is obviously no guard
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// (interprocedural conditions notwithstanding).
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if (!L) return false;
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BasicBlock *Predecessor = getLoopPredecessor(L);
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BasicBlock *PredecessorDest = L->getHeader();
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