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Update comments to reflect the current code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70357 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-04-29 01:54:20 +00:00
parent 1e59aa1332
commit f0aa4850ce
1 changed files with 4 additions and 4 deletions

8
lib/Analysis/ScalarEvolution.cpp

@ -717,8 +717,8 @@ SCEVHandle ScalarEvolution::getZeroExtendExpr(const SCEVHandle &Op,
// that value once it has finished.
SCEVHandle BECount = getBackedgeTakenCount(AR->getLoop());
if (!isa<SCEVCouldNotCompute>(BECount)) {
// Compute the extent of AR and divide it by the step value. This is
// used to determine if it's safe to extend the stride value.
// Manually compute the final value for AR, checking for
// overflow at each step.
SCEVHandle Start = AR->getStart();
SCEVHandle Step = AR->getStepRecurrence(*this);
@ -806,8 +806,8 @@ SCEVHandle ScalarEvolution::getSignExtendExpr(const SCEVHandle &Op,
// that value once it has finished.
SCEVHandle BECount = getBackedgeTakenCount(AR->getLoop());
if (!isa<SCEVCouldNotCompute>(BECount)) {
// Compute the extent of AR and divide it by the step value. This is
// used to determine if it's safe to extend the stride value.
// Manually compute the final value for AR, checking for
// overflow at each step.
SCEVHandle Start = AR->getStart();
SCEVHandle Step = AR->getStepRecurrence(*this);