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Update comments to reflect the current code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70357 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -717,8 +717,8 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
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// that value once it has finished.
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SCEVHandle BECount = getBackedgeTakenCount(AR->getLoop());
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if (!isa<SCEVCouldNotCompute>(BECount)) {
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// Compute the extent of AR and divide it by the step value. This is
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// used to determine if it's safe to extend the stride value.
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// Manually compute the final value for AR, checking for
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// overflow at each step.
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SCEVHandle Start = AR->getStart();
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SCEVHandle Step = AR->getStepRecurrence(*this);
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@ -806,8 +806,8 @@ SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op,
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// that value once it has finished.
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SCEVHandle BECount = getBackedgeTakenCount(AR->getLoop());
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if (!isa<SCEVCouldNotCompute>(BECount)) {
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// Compute the extent of AR and divide it by the step value. This is
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// used to determine if it's safe to extend the stride value.
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// Manually compute the final value for AR, checking for
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// overflow at each step.
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SCEVHandle Start = AR->getStart();
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SCEVHandle Step = AR->getStepRecurrence(*this);
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