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| -rw-r--r-- | lib/Transforms/Scalar/DeadLoopElimination.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/DeadLoopElimination.cpp b/lib/Transforms/Scalar/DeadLoopElimination.cpp index 3ae59c32f5..fc11cab809 100644 --- a/lib/Transforms/Scalar/DeadLoopElimination.cpp +++ b/lib/Transforms/Scalar/DeadLoopElimination.cpp @@ -126,6 +126,10 @@ bool DeadLoopElimination::IsLoopDead(Loop* L) { return true; } +/// runOnLoop - Remove dead loops, by which we mean loops that do not impact the +/// observable behavior of the program other than finite running time. Note +/// we do ensure that this never remove a loop that might be infinite, as doing +/// so could change the halting/non-halting nature of a program. bool DeadLoopElimination::runOnLoop(Loop* L, LPPassManager& LPM) { // Don't remove loops for which we can't solve the trip count. // They could be infinite, in which case we'd be changing program behavior. |