Update comments to reflect the current code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70357 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 63ad297..7f63217 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -717,8 +717,8 @@
// 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 @@
// 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);