diff options
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 669afa33ac..ede3bd9dde 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -218,7 +218,9 @@ namespace { LoopPass *llvm::createLICMPass() { return new LICM(); } -/// Hoist expressions out of the specified loop... +/// Hoist expressions out of the specified loop. Note, alias info for inner +/// loop is not preserved so it is not a good idea to run LICM multiple +/// times on one loop. /// bool LICM::runOnLoop(Loop *L, LPPassManager &LPM) { Changed = false; |