Rename forgetLoopBackedgeTakenCount to forgetLoop, because it

clears out more information than just the stored backedge taken count.

llvm-svn: 85664

1 files changed, 8 insertions, 8 deletions

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index abcd5292145..3e87ca22be3 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -3265,9 +3265,8 @@ ScalarEvolution::getBackedgeTakenInfo(const Loop *L) {
     // Now that we know more about the trip count for this loop, forget any
     // existing SCEV values for PHI nodes in this loop since they are only
     // conservative estimates made without the benefit of trip count
-    // information. This is similar to the code in
-    // forgetLoopBackedgeTakenCount, except that it handles SCEVUnknown PHI
-    // nodes specially.
+    // information. This is similar to the code in forgetLoop, except that
+    // it handles SCEVUnknown PHI nodes specially.
     if (ItCount.hasAnyInfo()) {
       SmallVector<Instruction *, 16> Worklist;
       PushLoopPHIs(L, Worklist);
@@ -3301,13 +3300,14 @@ ScalarEvolution::getBackedgeTakenInfo(const Loop *L) {
   return Pair.first->second;
 }
 
-/// forgetLoopBackedgeTakenCount - This method should be called by the
-/// client when it has changed a loop in a way that may effect
-/// ScalarEvolution's ability to compute a trip count, or if the loop
-/// is deleted.
-void ScalarEvolution::forgetLoopBackedgeTakenCount(const Loop *L) {
+/// forgetLoop - This method should be called by the client when it has
+/// changed a loop in a way that may effect ScalarEvolution's ability to
+/// compute a trip count, or if the loop is deleted.
+void ScalarEvolution::forgetLoop(const Loop *L) {
+  // Drop any stored trip count value.
   BackedgeTakenCounts.erase(L);
 
+  // Drop information about expressions based on loop-header PHIs.
   SmallVector<Instruction *, 16> Worklist;
   PushLoopPHIs(L, Worklist);