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use continue to reduce indentation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60192 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2076,25 +2076,26 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) {
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//
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//
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// FIXME: this needs to eliminate an induction variable even if it's being
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// FIXME: this needs to eliminate an induction variable even if it's being
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// compared against some value to decide loop termination.
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// compared against some value to decide loop termination.
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if (PN->hasOneUse()) {
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if (!PN->hasOneUse())
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SmallPtrSet<PHINode *, 2> PHIs;
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continue;
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for (Instruction *J = dyn_cast<Instruction>(*PN->use_begin());
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J && J->hasOneUse() && !J->mayWriteToMemory();
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SmallPtrSet<PHINode *, 4> PHIs;
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J = dyn_cast<Instruction>(*J->use_begin())) {
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for (Instruction *J = dyn_cast<Instruction>(*PN->use_begin());
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// If we find the original PHI, we've discovered a cycle.
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J && J->hasOneUse() && !J->mayWriteToMemory();
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if (J == PN) {
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J = dyn_cast<Instruction>(*J->use_begin())) {
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// Break the cycle and mark the PHI for deletion.
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// If we find the original PHI, we've discovered a cycle.
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SE->deleteValueFromRecords(PN);
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if (J == PN) {
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PN->replaceAllUsesWith(UndefValue::get(PN->getType()));
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// Break the cycle and mark the PHI for deletion.
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DeadInsts.insert(PN);
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SE->deleteValueFromRecords(PN);
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Changed = true;
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PN->replaceAllUsesWith(UndefValue::get(PN->getType()));
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break;
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DeadInsts.insert(PN);
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}
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Changed = true;
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// If we find a PHI more than once, we're on a cycle that
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break;
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// won't prove fruitful.
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if (isa<PHINode>(J) && !PHIs.insert(cast<PHINode>(J)))
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break;
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}
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}
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// If we find a PHI more than once, we're on a cycle that
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// won't prove fruitful.
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if (isa<PHINode>(J) && !PHIs.insert(cast<PHINode>(J)))
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break;
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}
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}
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}
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}
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DeleteTriviallyDeadInstructions(DeadInsts);
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DeleteTriviallyDeadInstructions(DeadInsts);
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