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[LoopSimplify] Reuse changeToUnreachable

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Use existing functionality provided in changeToUnreachable instead of
reinventing it in LoopSimplify.

No functionality change is intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258663 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2016-01-24 19:32:52 +00:00
parent 846ffdada2
commit de2bf5828a
1 changed files with 1 additions and 6 deletions
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7
lib/Transforms/Utils/LoopSimplify.cpp
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@ -489,14 +489,9 @@ ReprocessLoop:
DEBUG(dbgs() << "LoopSimplify: Deleting edge from dead predecessor "
<< P->getName() << "\n");
// Inform each successor of each dead pred.
for (succ_iterator SI = succ_begin(P), SE = succ_end(P); SI != SE; ++SI)
(*SI)->removePredecessor(P);
// Zap the dead pred's terminator and replace it with unreachable.
TerminatorInst *TI = P->getTerminator();
TI->replaceAllUsesWith(UndefValue::get(TI->getType()));
P->getTerminator()->eraseFromParent();
new UnreachableInst(P->getContext(), P);
changeToUnreachable(TI, /*UseLLVMTrap=*/false);
Changed = true;
}
}